CN112048618B - Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor - Google Patents
Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor Download PDFInfo
- Publication number
- CN112048618B CN112048618B CN202010952565.5A CN202010952565A CN112048618B CN 112048618 B CN112048618 B CN 112048618B CN 202010952565 A CN202010952565 A CN 202010952565A CN 112048618 B CN112048618 B CN 112048618B
- Authority
- CN
- China
- Prior art keywords
- water outlet
- mother liquor
- liquid
- pipe
- mountain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012452 mother liquor Substances 0.000 title claims abstract description 71
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 31
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 27
- 238000002386 leaching Methods 0.000 title claims abstract description 24
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000007788 liquid Substances 0.000 claims description 76
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- -1 rare earth ions Chemical class 0.000 description 26
- 230000008569 process Effects 0.000 description 18
- 239000000243 solution Substances 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 6
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 6
- 235000011130 ammonium sulphate Nutrition 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 241001122767 Theaceae Species 0.000 description 4
- 238000009940 knitting Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 241001494479 Pecora Species 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000008204 material by function Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
本发明公开了一种提高离子型稀土原地浸矿母液收集效率的方法，属于原地浸矿开采技术领域。本发明在导流孔(1)成孔后，立即插入桥式滤管(2)；在导流孔(1)孔口处，封堵桥式滤管(2)与导流孔(1)之间的间隙；桥式滤管(2)出水口连接三通管件(3)；三通管件(3)的另外两个管口分别连接出水管(4)和进气阀(5)；出水管(4)的出水口连接出水阀(6)；当出水管(4)中母液集满时，关闭进气阀(5)，开启出水阀(6)，收集母液。本发明在原有的渗流作用上安装桥式滤管(2)，加上虹吸作用，提高了母液在山体中的渗流速度，盲孔率的降低和渗流速度的提高，双重效应提高了母液收集效率。
The invention discloses a method for improving the collection efficiency of ionic rare earth in-situ leaching mother liquor, and belongs to the technical field of in-situ leaching and mining. In the present invention, the bridge filter tube (2) is inserted immediately after the diversion hole (1) is formed; the bridge filter tube (2) and the diversion hole (1) are blocked at the orifice of the diversion hole (1). the gap between; the water outlet of the bridge filter tube (2) is connected to the three-way pipe fitting (3); the other two nozzles of the three-way pipe fitting (3) are respectively connected to the water outlet pipe (4) and the intake valve (5); The water outlet of the water pipe (4) is connected to the water outlet valve (6); when the mother liquor in the water outlet pipe (4) is full, the air inlet valve (5) is closed, the water outlet valve (6) is opened, and the mother liquor is collected. In the present invention, bridge filter tubes (2) are installed on the original seepage effect, and the siphon effect is added to improve the seepage speed of the mother liquor in the mountain, reduce the blind porosity rate and increase the seepage speed, and the dual effect improves the mother liquor collection efficiency .
Description
Technical Field
The invention belongs to the technical field of ionic rare earth in-situ leaching mining, and particularly relates to a method for improving the collection efficiency of ionic rare earth in-situ leaching mother liquor.
Background
The rare earth is a general name of 17 rare elements such as lanthanum, cerium, praseodymium and the like, is a group of novel functional materials with various characteristics such as electricity, magnetism, light, biology and the like, and is an important basic material for the high-tech fields such as information technology, biotechnology, energy technology and the like and national defense construction. The rare earth has wide application, and the functional materials needing to use the rare earth have various types, form a large-scale and large-scale high-technology industrial group, and have very wide market prospect and extremely important strategic significance. The ionic rare earth resources in five provinces in south such as Jiangxi and Guangdong belong to medium-heavy rare earth resources, are discovered only in China so far, have extremely high and valuable economic values, are listed as the implementation of national protective mining of specific mineral species by the government of China, and are national strategic resources.
The mining process of the ionic rare earth ore is subjected to a pool leaching process and a heap leaching process, and is developed into in-situ ore leaching. The process for mining ionic rare earth by in-situ leaching is characterized by that in the rare earth ore body zone a liquid-injection well network is arranged, and a leaching agent solution is injected into the ore body by means of liquid-injection well to make it and rare earth ions produce exchange reaction to form mother liquor, and the mother liquor is flowed out from liquor-collecting engineering, and the rare earth in the mother liquor is precipitated by oxalic acid so as to implement the goal of recovering resource. Because surface soil does not need to be stripped and ore bodies do not need to be excavated and carried in the in-situ leaching mining process, the aims of not damaging vegetation, having small environmental pollution and greatly improving the recovery rate of rare earth resources are fulfilled, the mining process is called as a green and efficient mining process, and better social and economic benefits are obtained. At present, the ion type rare earth mine in south is popularizing and applying an in-situ leaching mining process.
How to efficiently recover the mother liquor is one of the core technical problems faced by the in-situ ore leaching process, and the composite liquid collection of a roadway and a diversion hole is mainly adopted. The liquid is directly collected after the high-pressure pore-forming of the diversion holes, and the internal collapse and blockage of the diversion holes are easily caused in the liquid collecting process along with the seepage of mother liquid, so that blind holes are formed. In the existing in-situ leaching ion type rare earth mining process, the rate of blind holes formed by blocking the diversion holes reaches more than 30 percent, and the recovery rate of mother liquor is greatly reduced, so that the vitality of the in-situ leaching process is directly determined by a liquor collecting technology. Because the mother liquor can not be smoothly leaked out, the mother liquor is retained in the mountain, and the problems of geological disasters, environmental pollution and the like are easily caused. How to reduce the blind hole rate and improve the liquid collection efficiency by a scientific means is an urgent problem to be solved in the ionic rare earth in-situ leaching mining.
Disclosure of Invention
The invention aims to solve the technical problem of low collection efficiency of the ionic rare earth in-situ leaching mother liquor.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for improving the collection efficiency of the ionic rare earth in-situ leaching mother liquor comprises the following steps:
a. after the diversion holes are formed, the bridge type filter pipe is immediately inserted;
b. at the orifice of the diversion hole, the gap between the bridge filter tube and the diversion hole is sealed; the water outlet of the bridge type filter pipe is connected with a three-way pipe fitting; the other two pipe orifices of the three-way pipe fitting are respectively connected with a water outlet pipe and an air inlet valve; the water outlet of the water outlet pipe is connected with a water outlet valve;
c. opening an air inlet valve, closing a water outlet valve, and gradually accumulating the mother liquor in a water outlet pipe along with the seepage of the mother liquor;
d. when the mother liquid in the water outlet pipe is full, the air inlet valve is closed, the water outlet valve is opened, the outlet of the water outlet valve is immersed in the mother liquid or other liquid, and the mother liquid is collected.
In the method, the water outlet pipe is a hose or is formed by connecting a hose and a hard pipe.
In the method, the flow speed v of the control liquid in the mountain is calculated according to the following equation by controlling the height difference h between the water outlet valve and the three-way pipe fittingwThe liquid is prevented from forming a direct current channel;
ρwgh2·πr2＝P0V0；
r-inner radius of the water outlet pipe;
h is the height difference between the water outlet valve and the tee pipe fitting;
V0-the effective volume of the flow guiding hole;
ρw-the mother liquor density;
g-gravitational acceleration;
P0the height difference between the water outlet valve and the tee pipe fitting is used for generating siphon pressure in the bridge type filter pipe;
hw-head or total head;
uw-liquid pore pressure;
vw-the flow velocity of the liquid in the mountain;
va-the flow velocity of the gas in the mountain;
kathe air flows down along the mountain to the permeability coefficient of the diversion hole;
l is the distance from the residual air in the mountain to the diversion hole;
y is a gravity head, a liquid injection port is connected to the liquid gravity head of the diversion hole;
vi-the velocity of the i-phase flow in the mountain;
ki-permeability coefficient of phase i in the mountain;
i-the phase of the fluid in the mountain, containing water w and air a.
As can be understood by those skilled in the art, the invention requires installation of the bridge type filter pipe, and the diversion hole has a certain depth, so as to facilitate the operation, the diversion hole should extend from the side wall of the mountain to the inside of the mountain, the bridge type filter pipe extends to the inside of the mountain along with the diversion hole, and the water outlet of the bridge type filter pipe is positioned outside the side wall of the mountain. In addition, it will also be appreciated that to avoid liquid flowing out of the inlet valve, the inlet valve should be higher than the tee.
The invention has the beneficial effects that: the invention aims to solve the problem of low collection efficiency of ionic rare earth in-situ leaching mother liquor, and aims to improve the seepage speed of the mother liquor, thereby simultaneously avoiding blockage caused by collapse in a mountain diversion hole and improving the seepage speed of the mother liquor in a mountain.
The inventor tests that the common filter pipe is directly inserted into the diversion hole, but the filter hole is still blocked by silt, and although blind holes can be reduced, the liquid receiving amount is low; the back test wraps up cotton, numb or nylon knitting outside ordinary chimney filter, but the process of wrapping up the knitting outside ordinary chimney filter is too extravagant time, and tens meters's chimney filter need wrap up closely in proper order to the process of downthehole installation chimney filter of past water conservancy diversion is very difficult, and knitting and water conservancy diversion downthehole wall scraping can not promote, still very easily damages the knitting. The bridge type filter pipe is finally installed in the flow guide hole, the bridge type bulge is arranged outside the filter pipe, the flow guide hole can be effectively prevented from collapsing and blocking the water filter hole, the blind hole rate can be reduced to zero, and the bridge type filter pipe is convenient to install and durable.
The invention adds siphon action on the original seepage action by the measures of installing a bridge type filter pipe, plugging, connecting a tee joint, a drain pipe and the like, thereby greatly improving the seepage speed of the mother liquor in the mountain. The inventor also considers that the vacuum system is adopted to improve the seepage speed, but the vacuum system and the water-gas separation equipment are arranged, so that the investment cost is high, professional electric power and equipment maintenance personnel are needed, the labor cost is increased, the siphon action is directly adopted, the cost is low, the operation is simple, and the control is easy. The invention has the dual effects of reducing the blind hole rate and improving the seepage speed, thereby improving the mother liquor collection efficiency. Meanwhile, due to the improvement of the liquid receiving efficiency, the retention content of the mother liquid in the mine is also reduced, the saturation degree is reduced, the shear strength of the mine is improved, and the probability of geological disasters is further reduced.
In addition, the invention also provides a method for controlling the flowing speed v of the liquid in the mountain by controlling the height difference h between the water outlet valve and the three-way pipe fittingwThe technical scheme of (1); when the technical personnel specifically implement the scheme of the invention, the highest v can be judged according to the specific measurement data of the mountain and the experience of the technical personnelwThus obtaining the highest h; v can also be calculated by h set by the real situationwThen judging whether h is feasible or not according to some data of the mountain and self experience; therefore, the liquid is prevented from forming a direct current channel in the mountain body due to the use of too high h (direct current is easily formed after the pressure generated by siphoning is more than or equal to the residual air pressure value), and the problems of incomplete reaction after liquid injection and low rare earth content in the mother liquid are avoided.
Drawings
FIG. 1 is a schematic view showing the positions of a flow guide hole, a bridge type filter tube, a tee pipe fitting and a water outlet pipe of the present invention;
FIG. 2 is a schematic diagram of an in-situ leaching arrangement.
Labeled as: the device comprises a flow guide hole 1, a bridge type filter pipe 2, a three-way pipe 3, a water outlet pipe 4, an air inlet valve 5, a water outlet valve 6, a mountain 7 and a liquid injection well 8.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1 and fig. 2, the method for improving the collection efficiency of the ionic rare earth in-situ leaching mother liquor comprises the following steps:
a. after the diversion holes 1 are formed, the bridge type filter pipes 2 are immediately inserted;
b. at the orifice of the diversion hole 1, a gap between the bridge type filter pipe 2 and the diversion hole 1 is sealed; the water outlet of the bridge type filter pipe 2 is connected with a tee pipe fitting 3; the other two pipe orifices of the three-way pipe fitting 3 are respectively connected with a water outlet pipe 4 and an air inlet valve 5; the water outlet of the water outlet pipe 4 is connected with a water outlet valve 6;
c. an air inlet valve 5 is opened, a water outlet valve 6 is closed, and the mother liquor is gradually accumulated in a water outlet pipe 4 along with the seepage of the mother liquor;
d. when the mother liquor in the water outlet pipe 4 is full, the air inlet valve 5 is closed, the water outlet valve 6 is opened, the outlet of the water outlet valve 6 is immersed in the mother liquor or other liquids, and the mother liquor is collected.
The preferred outlet pipe 4 is a hose, or is formed by connecting a hose and a hard pipe, so that the adjustment can be more conveniently carried out according to the seepage condition, namely, the height difference between the outlet valve 6 and the three-way pipe fitting 3 is adjusted according to the seepage condition, and the siphon negative pressure acting force is increased or reduced.
Preferably, the inner diameter of the water outlet pipe 4 is 50 mm.
The flowing speed of the fluid in the soil satisfies the formula (1), and the negative sign is the flowing direction:
vi-the velocity of the i-phase flow in the mountain 7;
ki-permeability coefficient of phase i in mountain 7;
i-the phase of the fluid in the mountain 7, comprising water w and air a;
the original diversion hole directly receives the liquid, the total flow head of the mother liquid is shown as the formula (2),
hw-head or total head;
g-gravitational acceleration;
uw-liquid pore pressure;
vwthe flow velocity of the liquid in the mountain 7;
vathe flow velocity of the gas in the mountain 7;
kathe air flows down along the mountain 7 to the permeability coefficient of the diversion holes;
l is the distance from the residual air in the mountain 7 to the diversion hole;
ρw-the mother liquor density;
the liquid is collected by using the siphon negative pressure filter tube drainage technology, the total flow head of the mother liquid is as shown in the formula (3),
P0the height difference between the water outlet valve 6 and the tee pipe fitting 3 is used for generating siphon pressure in the bridge type filter pipe 2;
the first term y on the right in the formula (3) is a gravity head; second item
A mother liquor pressure head; item III
Is a mother liquor velocity head; item four
The maximum value of the residual air pressure in the soil is the soil air inlet value and is related to the large pore diameter of the soil; the fifth item
An energy head for generating suction force to the mother liquid for siphoning.
EgThe gravitational potential energy of the mother liquor in the water outlet pipe 4;
EP-siphon energy;
r-inner radius of water outlet pipe 4;
h is the height difference between the water outlet valve 6 and the tee pipe fitting 3;
V0-effective volume of the flow guiding hole 1;
from the above analysis, it is found that the equation (3) has a larger energy head by the fifth term siphon action than the equation (2), and therefore the total energy head when there is siphon action is larger than that when there is no siphon action, and further, the seepage rate of the mother liquor when there is siphon action, that is, the seepage rate per unit time is larger than that when there is no siphon action, and the liquid collecting efficiency is improved by the equation (1). On the other hand, when implementing the solution of the present invention, the technician can judge the highest v according to some measured data and his own experience of the mountain 7wThus obtaining the highest h; v can also be calculated by h set by the real situationwThen judging whether h is feasible or not according to some measured data of the mountain and self experience; therefore, the liquid is prevented from forming a direct current channel in the mountain body 7 by using too high h (direct current is easily formed after the pressure generated by siphoning is more than or equal to the residual air pressure value), and the problems of incomplete reaction after liquid injection and low rare earth content of the mother liquid are avoided.
The technical solution of the present invention is further described below by way of examples.
In the rare earth mining tea garden block in the Yan river sheep industrial park area of south county, Yan river sheep of Ningde City of Fujian province, the mother liquor is directly collected by adopting the diversion holes, and the rear original holes are all transformed into the diversion holes with the insertion of bridge filter tubes for siphon effect to assist in collecting the mother liquor.
The original mother liquor is collected after the direct diversion holes are formed, the blind hole rate is about 30 percent, all diversion holes are cleaned again, the bridge type filter tube is inserted, and after the mother liquor is collected by siphonage, the blind hole rate is 0 percent.
Example 1 raw guide hole direct receiving liquid
The specific operation process is as follows:
a. using a kilometer drill to extend and drill a diversion hole 1 to the interior of the mountain body upwards from the side wall of the mountain body, wherein the hole diameter is 10cm, the hole depth is 45m, and the distance is 0.25 m;
b. injecting an ammonium sulfate solution from the injection well 8;
c. the ammonium sulfate solution flows through the mountain 7, the ammonium ions and the rare earth ions in the mountain are subjected to exchange reaction to generate a rare earth sulfate solution (namely mother liquor), and the mother liquor flows out of the roadway and the diversion holes 1 through seepage and is collected in a liquid collecting pool;
after the seepage is stable, the blind hole rate of the diversion hole of the tea garden block is counted to be about 30 percent, and the 15 percent liquid receiving amount is 2-3 m3D, about 50% liquid recovery from 8 to 10m3D pore, about 5% liquid take-up of 15-17 m3D; the liquid receiving amount is 2-3 m3D and 8-10 m3The rare earth ion content of mother liquor of hole d is 0.3-0.4 g/L, and the liquor receiving amount is 15-17 m3The rare earth ion content of the mother liquor of the hole d is 0.7-1.5 g/L, and when the rare earth ion content in the mother liquor is less than 0.1g/L, the collection value is not considered; namely: the liquid is directly received by the diversion holes, the diversion hole rate for normally efficiently receiving the liquid is about 50%, the blind hole rate is as high as 30%, 15% of the diversion holes are low in liquid receiving efficiency, and 5% of the diversion holes have low rare earth ion content in the mother liquid of the direct current channel.
EXAMPLE 2 liquid recovery Using bridge Filter tubes
The specific operation process is as follows:
a. using a kilometer drill to extend and drill a diversion hole 1 to the interior of the mountain body upwards from the side wall of the mountain body, wherein the hole diameter is 10cm, the hole depth is 45m, and the distance is 0.25 m;
b. after the diversion holes 1 are formed, jacks are used for connecting and inserting the bridge type filter pipes 2 in sections;
c. injecting an ammonium sulfate solution from the injection well 8;
d. the ammonium sulfate solution flows through the mountain 7, the ammonium ions and the rare earth ions in the mountain are subjected to exchange reaction to generate a rare earth sulfate solution (namely mother liquor), and the mother liquor flows out of the roadway and the bridge type filter pipe 2 through seepage to a liquid collecting pool for collection;
after the seepage is stable, the blind hole rate of the diversion hole of the tea garden block is counted to be 0 percent, and the about 21 percent liquid receiving amount is counted to be 2-3 m3D pore, about 72% liquid take-up of 8-10 m3D pore, about 7% liquid recovery from 15 to 17m3D; the liquid receiving amount is 2-3 m3D and 8-10 m3The rare earth ion content of mother liquor of hole d is 0.3-0.4 g/L, and the liquor receiving amount is 15-17 m3The rare earth ion content of the mother liquor of the hole d is 0.7-1.5 g/L, and when the rare earth ion content in the mother liquor is less than 0.1g/L, the collection value is not considered; namely: after the liquid is collected by the bridge type filter tube, the flow guide hole rate of the liquid collected with normal efficiency is about 72 percent, the blind hole rate is 0 percent, the liquid collecting efficiency of 21 percent of flow guide holes is low, and the rare earth ion content of the mother liquid of a direct current channel existing in 7 percent of flow guide holes is low.
Example 3 mother liquor Collection Using the Process of the invention
The specific operation process is as follows:
a. using a kilometer drill to extend and drill a diversion hole 1 to the interior of the mountain body upwards from the side wall of the mountain body, wherein the hole diameter is 10cm, the hole depth is 45m, and the distance is 0.25 m;
b. after the diversion holes 1 are formed, jacks are used for connecting and inserting the bridge type filter pipes 2 in sections;
c. at the orifice of the diversion hole 1, a gap between the bridge type filter pipe 2 and the diversion hole 1 is sealed; the water outlet of the bridge type filter pipe 2 is connected with a tee pipe fitting 3; the other two pipe orifices of the three-way pipe fitting 3 are respectively connected with a water outlet pipe 4 and an air inlet valve 5; the water outlet of the water outlet pipe 4 is connected with a water outlet valve 6;
d. injecting an ammonium sulfate solution from the injection well 8;
e. enabling the ammonium sulfate solution to flow through the mountain body 7, enabling ammonium ions to perform exchange reaction with rare earth ions in the mountain body to generate a sulfuric acid rare earth solution (namely mother liquor), opening the air inlet valve 5, closing the water outlet valve 6, and gradually accumulating the mother liquor in the water outlet pipe 4 along with the seepage of the mother liquor;
f. when the mother liquor in the water outlet pipe 4 is full, the air inlet valve 5 is closed, the water outlet valve 6 is opened, and the mother liquor is collected.
g. According to experience and indoor experiments, when the permeation speed is more than 1 m/day and night, the concentration of rare earth ions in the ore block mother liquor is low; the field collection of soil sample canTesting the permeability coefficient k of the i phasei(ii) a The air inlet value of the soil sample, namely the maximum residual air pressure, can be tested through a triaxial experiment, and then the maximum residual air pressure can be obtained
The gravity head y and the liquid pore pressure u can be known according to the position of the flow guide holewAnd then respectively calculating the maximum siphon negative pressure required by the 21% diversion holes with lower liquid receiving efficiency, further converting the maximum siphon negative pressure into the maximum height difference h15 m between the water outlet valve 6 of the hose 4 and the tee pipe fitting, and correspondingly adjusting the height difference to be close to and lower than the calculated value, for example, the height difference of a siphon pipe needs to be adjusted to 14 m by No. 79-87 9 diversion holes. When the siphon height difference is 0m, the liquid receiving amount of the 9 diversion holes is lower than that of diversion holes in other areas, but the rare earth ion content of mother liquor is 0.3-0.4 g/L, the siphon height difference is gradually increased, the liquid receiving amount of the diversion holes is correspondingly increased, but the rare earth ion content of the mother liquor is gradually reduced, and when the siphon height difference exceeds 14 m and reaches 15 m, the average liquid receiving amount of the 9 diversion holes reaches 16.3m3D, but the content of rare earth ions in the mother liquor is less than 0.1 g/L.
In conclusion, the technology of the invention can reduce the blind hole rate of the guide hole of the tea garden block to 0 percent and the about 93 percent liquid receiving amount to 8-10 m3D pore, about 7% liquid recovery from 15 to 17m3D; the liquid receiving amount is 8-10 m3The rare earth ion content of mother liquor of hole d is 0.3-0.4 g/L, and the liquor receiving amount is 15-17 m3The rare earth ion content of the mother liquor of the hole d is 0.7-1.5 g/L, and when the rare earth ion content in the mother liquor is less than 0.1g/L, the collection value is not considered; namely: by adopting the method, the flow guide hole ratio of the liquid collected at normal efficiency is improved to about 93 percent, the blind hole ratio is reduced to 0 percent, the flow guide hole ratio of the liquid collected at low efficiency is reduced to 0 percent, and the rare earth ion content of the mother liquid in a direct current channel existing in 7 percent of flow guide holes is low.
Claims (2)
1. The method for improving the collection efficiency of the ionic rare earth in-situ leaching mother liquor is characterized by comprising the following steps of:
a. after the diversion holes (1) are formed, the bridge type filter pipes (2) are immediately inserted;
b. at the hole opening of the diversion hole (1), a gap between the bridge type filter pipe (2) and the diversion hole (1) is sealed; the water outlet of the bridge type filter pipe (2) is connected with a three-way pipe fitting (3); the other two pipe orifices of the three-way pipe fitting (3) are respectively connected with a water outlet pipe (4) and an air inlet valve (5); the water outlet of the water outlet pipe (4) is connected with a water outlet valve (6);
c. an air inlet valve (5) is opened, a water outlet valve (6) is closed, and the mother liquor is gradually accumulated in a water outlet pipe (4) along with the seepage of the mother liquor;
d. when the mother liquor in the water outlet pipe (4) is fully collected, closing the air inlet valve (5), opening the water outlet valve (6), immersing the outlet of the water outlet valve (6) into the mother liquor or other liquids, and collecting the mother liquor;
by controlling the height difference h between the water outlet valve (6) and the tee pipe (3), the flow speed v of the control liquid in the mountain body (7) is calculated according to the following equationwThe liquid is prevented from forming a direct current channel;
ρwgh2·πr2＝P0V0；
r is the inner radius of the water outlet pipe (4);
h is the height difference between the water outlet valve (6) and the three-way pipe fitting (3);
V0-effective volume of the flow guiding hole (1);
ρw-the mother liquor density;
g-gravitational acceleration;
P0the height difference between the water outlet valve (6) and the three-way pipe fitting (3) is used for controlling the siphon pressure generated in the bridge type filter pipe (2);
the liquid is collected by using a siphon negative pressure filter tube drainage technology, and the flowing total head of the mother liquid is shown as the following formula:
uw-liquid pore pressure;
vw-the flow velocity of the liquid in the mountain (7);
va-the flow velocity of the gas in the mountain (7);
ka-air rimThe mountain body (7) is downward to the permeability coefficient of the diversion hole;
l is the distance from the residual air in the mountain body (7) to the diversion hole;
y is a gravity head, and the liquid injection port is connected to the liquid gravity head of the diversion hole (1);
the flow velocity of the fluid in the soil is shown by the following formula, with the negative sign indicating the direction of flow:
vi-the velocity of the i-phase flow in the mountain (7);
ki-permeability coefficient of phase i in the mountain (7);
i-the phase of the fluid in the mountain (7), comprising water w and air a.
2. The method for improving the collection efficiency of the ionic rare earth in-situ leaching mother liquor according to claim 1, wherein the method comprises the following steps: the water outlet pipe (4) is a hose or is formed by connecting a hose and a hard pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952565.5A CN112048618B (en) | 2020-09-11 | 2020-09-11 | Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010952565.5A CN112048618B (en) | 2020-09-11 | 2020-09-11 | Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112048618A CN112048618A (en) | 2020-12-08 |
| CN112048618B true CN112048618B (en) | 2022-03-04 |
Family
ID=73611059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010952565.5A Active CN112048618B (en) | 2020-09-11 | 2020-09-11 | Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112048618B (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906536B (en) * | 2010-08-03 | 2012-01-04 | 江西稀有金属钨业控股集团有限公司 | On-site extraction, drainage and liquid collection process with auxiliary tunnels |
| CN105112652B (en) * | 2015-08-10 | 2018-09-21 | 江西理工大学 | A kind of rare earth ore in-situ leaching disposing mother liquor canal body structure |
-
2020
- 2020-09-11 CN CN202010952565.5A patent/CN112048618B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112048618A (en) | 2020-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102392129B (en) | Method and system of in-situ ore leaching and leachate discharge of ion adsorption type ore | |
| CN106644385B (en) | Surface water and underground water subsurface flow exchange self-circulation test device and use method | |
| CN104787830B (en) | A kind of underground water in-situ arsenic removing method based on sulfate reduction | |
| CN109047305A (en) | Chemical pollution place soil and groundwater in-situ remediation system and restorative procedure | |
| CN110331281A (en) | A kind of in-situ acid uranium leaching list exploiting field independence acidization tool | |
| CN208350564U (en) | Sand tank device capable of finely depicting migration and conversion of pollutants in aquifer | |
| CN102352615B (en) | An emergency treatment method for water pollution accidents | |
| CN112048618B (en) | Method for improving collection efficiency of ionic rare earth in-situ leaching mother liquor | |
| CN113605873B (en) | Method and system for determining optimal mineralization of fracturing fluid for inhibiting coal powder retention in fractures | |
| CN209287958U (en) | Chemical pollution place soil and groundwater in-situ remediation system | |
| CN103880142B (en) | Method for plating iron and in situ removing arsenic for regional aquifer | |
| CN106242029B (en) | A kind of karez formula underground water pollution repair system | |
| CN102720266A (en) | Siphon type dredging device for water storage and drainage tunnel | |
| CN203161193U (en) | Oilfield closed water injection device based on capsule type gas pressure tank | |
| CN210066996U (en) | Underground pipe network water jet dredging construction device | |
| CN110066919B (en) | Vacuum extraction device and method for ionic rare earth mining | |
| CN217384945U (en) | Enrichment device | |
| CN218496820U (en) | Water quality measuring device | |
| CN105735418B (en) | A kind of underground hidden pipe formula seepage flow system | |
| CN218174706U (en) | Device for treating shale gas wastewater based on disc tube type reverse osmosis membrane | |
| KR102388941B1 (en) | SAPS unmanned automatic purification management system for mine drainage treatment | |
| CN211452999U (en) | Underground water monitoring well | |
| CN210718172U (en) | Partitioned recharge type middle-deep geothermal energy collecting well | |
| CN203487619U (en) | Water resource recycling system for city underground engineering construction | |
| CN207047948U (en) | Utilize the system that polluted underground water is collected with pressure-reduction level transverse tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |