CN113441275A - High-ash coking coal deep dissociation separation equipment and method - Google Patents
High-ash coking coal deep dissociation separation equipment and method Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 232
- 238000010494 dissociation reaction Methods 0.000 title claims abstract description 30
- 230000005593 dissociations Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000000926 separation method Methods 0.000 title claims abstract description 30
- 238000004939 coking Methods 0.000 title claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 20
- 239000006148 magnetic separator Substances 0.000 claims description 20
- 239000010878 waste rock Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 239000012141 concentrate Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 240000005561 Musa balbisiana Species 0.000 claims description 2
- 235000018290 Musa x paradisiaca Nutrition 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 2
- 238000007873 sieving Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 241000196324 Embryophyta Species 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001584775 Tunga penetrans Species 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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Abstract
The embodiment of the invention provides a high-ash coking coal deep dissociation and separation device and a method thereof, wherein the device comprises: the cyclone is used for separating the raw material coal into gangue, middlings and clean coal; a gangue outlet of the cyclone is connected with a gangue medium removal sieve which is used for removing medium, dehydrating and grading gangue; the middling outlet and the clean coal outlet of the cyclone are correspondingly connected with a middling medium removing sieve and a clean coal medium removing sieve respectively through a medium draining sieve, the middling medium removing sieve and the clean coal medium removing sieve respectively perform medium removing, dewatering and grading on middling coal and clean coal, and respectively obtain oversize products, and the oversize product outlets of the middling medium removing sieve and the clean coal medium removing sieve are both connected with the inlet of the crusher; the crusher is used for deeply crushing and dissociating oversize products of the middlings medium removing sieve and the clean coal medium removing sieve, namely, lump middlings and lump clean coals, and an outlet of the crusher is connected with an inlet of the cyclone so as to separate the crushed products serving as raw material coals to be separated again. The method reduces the cost, simplifies the operation and improves the recovery rate of coking coal resources.
Description
Technical Field
The invention relates to the technical field of coal separation, in particular to high-ash coking coal deep dissociation separation equipment and method.
Background
In the coal sorting process, due to the poor dissociation degree of the lump coal, the embedment of clean coal and inorganic minerals is common, and particularly, the embedment phenomenon of the lump coal with high ash content is more serious. When the lump coal contains a small amount of inorganic minerals, the lump coal is generally used as clean coal products, but the inorganic minerals in the lump coal can cause the ash content and the sulfur content of the lump clean coal to be higher, and have larger influence on the subsequent steel smelting. When the lump coal contains more inorganic minerals, the part of the lump coal is generally used as a middling product, and the middling product is often used as power coal, so that the waste of coking coal resources is caused.
The low-ash clean coal and the inorganic mineral can be separated to a certain extent by increasing the dissociation degree of the lump coal, the ash content and the sulfur content of the clean coal can be effectively reduced by dissociating and re-selecting the lump coal, the low-ash clean coal carried in the lump clean coal and the lump middling coal is recycled, the yield of the clean coal can be increased, and the resource utilization rate is improved. In the prior art, there are many methods for dissociating and reselecting lump coals, for example, the publication number is CN 104437831a, which is named as a patent application of a reselecting middlings sorting process, and the method dissociates and reselects lump middlings by adding a sorting system, but needs to set a plurality of sorting systems, resulting in a complex production process, increased investment cost, increased production and operation cost, and low reselecting economic benefit.
In addition, when the separation process is designed for raw coal with high gangue content, a pre-gangue discharge link is usually added, and most of gangue is discharged out of a production system in advance, so that the investment and production cost are reduced. The mode of pre-discharging waste rock in the prior art comprises the steps of discharging waste rock by a movable screen jigger, discharging waste rock by an intelligent dry separator, discharging waste rock by a heavy medium shallow slot separator and the like, but the fact that the link of pre-discharging waste rock is additionally arranged in actual production can make a production system of a coal preparation plant complex, directly causes the investment and production cost of the coal preparation plant to be greatly increased, is not beneficial to the improvement of the economic benefit of the coal preparation plant, and does not accord with the energy-saving policy of the state.
Disclosure of Invention
In view of this, the embodiments of the present invention provide an apparatus and a method for deep dissociation and separation of high ash content coking coal, so as to solve the above technical problems.
In order to achieve the technical purpose, the embodiment of the invention provides a high ash content coking coal deep dissociation separation device, which is improved by comprising the following components: the device comprises a cyclone, a gangue medium removal sieve, two medium discharge sieves, a middling medium removal sieve, a clean coal medium removal sieve and a crusher;
the cyclone inlet is used for receiving raw material coal to be sorted, the cyclone is used for sorting the raw material coal, and sorted products comprise gangue, middlings and clean coal;
the gangue outlet of the cyclone is connected with the gangue medium removing sieve, and the gangue medium removing sieve is used for removing medium, dehydrating and grading gangue and then discharging the gangue;
the middling outlet and the clean coal outlet of the cyclone are respectively and correspondingly connected with the middling medium removing sieve and the clean coal medium removing sieve through the medium draining sieve, the middling medium removing sieve and the clean coal medium removing sieve respectively remove media, dehydrate and classify middling coal and clean coal, and respectively obtain oversize product blocks of middling coal and clean coal, and the oversize product outlets of the middling medium removing sieve and the clean coal medium removing sieve are both connected with the inlet of the crusher;
the breaker is arranged in carrying out the degree of depth breakage to the product piece middlings on the screen and the piece cleaned coal and disassociates, the exit linkage of breaker the swirler import to select separately the feed coal once more as waiting to select separately the broken product.
In order to achieve the technical purpose, the embodiment of the invention also provides a deep dissociation and separation method of high ash content coking coal, which is improved by comprising the following steps:
sorting raw material coal through a cyclone, wherein the sorted products comprise gangue, middlings and clean coal;
discharging the processed gangue, processing the middlings and clean coals to obtain lump middlings and lump clean coals, and discharging the lump middlings and the lump clean coals to a crusher for deep crushing and dissociation;
screening out lump coal products with the size above a preset size for deep crushing and dissociation;
the crushed product is returned to the cyclone for re-sorting.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, the cyclone is arranged to divide the raw material coal into the gangue, the middlings and the clean coals, the gangue is discharged after being treated, and only the graded middlings and clean coals are deeply crushed and dissociated, so that the feeding amount of the crusher is reduced by times, therefore, the cost of the crushing link is reduced, the service life of the crusher is prolonged, the over-crushing of the coal is reduced, and the pressure of a subsequent slime water treatment system is reduced.
2. According to the invention, the outlet of the crusher is connected with the inlet of the cyclone, so that the crushed product is selected again as the raw material coal to be selected, namely, the separation degree is increased and then the crushed product is selected, therefore, the ash content and the sulfur content of the clean coal are effectively reduced, the process is simplified, the recovery rate of the clean coal is improved, the effective recovery of scarce coking coal resources is realized, and the investment and production operation cost are reduced.
3. According to the invention, the 'pre-gangue discharge' and 'lump coal crushing and backwashing' of coal dressing are integrated into the main dressing system, so that the coal quality change can be more conveniently adjusted, the operation is simpler, and the energy consumption and equipment failure rate of a coal dressing plant can be greatly reduced.
The invention has convenient operation and low cost, and can be widely applied to the technical field of coal separation.
Drawings
FIG. 1 is a block diagram of one embodiment of the high ash coking coal deep dissociation separation apparatus of the present invention;
FIG. 2 is a schematic view of the use of FIG. 1;
FIG. 3 is a flow diagram of one embodiment of the deep dissociation separation method for high ash coking coal of the present invention;
FIG. 4 is a structural view of a high ash coking coal deep dissociation separation apparatus of the present invention in which comparative example 1 is employed;
FIG. 5 is a schematic view of the use of FIG. 4;
FIG. 6 is a structural view of a high ash coking coal deep dissociation separation apparatus of the present invention in comparative example 2;
fig. 7 is a schematic view of the use process of fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides a high ash coking coal deep dissociation separation apparatus, including: the device comprises a cyclone 1, a gangue medium removing sieve 2, two medium draining sieves 3, a middling medium removing sieve 4, a clean coal medium removing sieve 5 and a crusher 6;
an inlet of the cyclone 1 is used for receiving raw material coal to be sorted, the cyclone 1 is used for sorting the raw material coal, and sorted products include but are not limited to gangue, middlings and clean coal;
a gangue outlet of the cyclone 1 is connected with a gangue medium removing sieve 2, and the gangue medium removing sieve 2 is used for removing medium, dehydrating and grading gangue and then discharging the gangue;
a middling outlet and a clean coal outlet of the cyclone 1 are correspondingly connected with a middling medium removing sieve 4 and a clean coal medium removing sieve 5 through a medium draining sieve 3 respectively, the middling medium removing sieve 4 and the clean coal medium removing sieve 5 are used for removing media and grading middling and clean coal respectively and obtaining oversize products respectively, and oversize product outlets of the middling medium removing sieve 4 and the clean coal medium removing sieve 5 are connected with an inlet of a crusher 6;
the crusher 6 is used for deeply crushing and dissociating the coal in the oversize product blocks and the block clean coal, and the outlet of the crusher 6 is connected with the inlet of the cyclone 1 so as to separate the crushed product serving as the raw material coal to be separated again.
Obviously, the cyclone 1 is arranged to divide raw material coal into gangue, middlings and clean coal, the gangue is discharged after being treated, and only the treated middlings and clean coal blocks are deeply crushed and dissociated, so that the feeding amount of the crusher 6 is reduced by times, the cost of a crushing link is reduced, the service life of the crusher 6 is prolonged, over-crushing of the coal is reduced, and the pressure of a subsequent slime water treatment system is reduced;
because the outlet of the crusher 6 is connected with the inlet of the cyclone 1, the crushed product is selected again as the raw material coal to be selected, namely, the separation degree is increased and then the crushed product is selected again, the ash content and the sulfur content of the clean coal are effectively reduced, the process is simplified, the recovery rate of the clean coal is improved, the effective recovery of scarce coking coal resources is realized, and the investment and the production operation cost are reduced;
along with the enhancement of the mining degree of coal, the coal quality change is larger, the change of the content of gangue in raw coal is larger, and coking coal with high ash content is more prominent.
In some embodiments, a raw coal rubber belt conveyor 7 is arranged at the inlet of the cyclone 1, and the raw coal rubber belt conveyor 7 is used for conveying raw coal to be sorted to the inlet of the cyclone 1;
in this embodiment, preprocessing device is connected to 7 pan feeding positions of raw coal rubber belt conveyor, and preprocessing device is used for carrying out edulcoration deironing with the raw coal and handles to acquire the granularity upper limit and wait to select separately raw coal for 200mm, 7 ejection of compact positions of raw coal rubber belt conveyor set up and fall the case, will wait to select separately raw coal through falling the case and import to swirler 1.
In some embodiments, the cyclone 1 can adopt a non-pressure feeding three-product dense medium cyclone, in particular to an S-3GHMC type super non-pressure feeding three-product dense medium cyclone which has the characteristics of large gangue discharge amount, large upper limit of feeding, low energy consumption, high separation precision and the like, and raw coal entering a factory can be separated only by simply removing impurities and iron, rather than adopting a conventional process to remove impurities, crush and iron and then separate;
in this embodiment, the non-pressure feeding three-product dense medium cyclone realizes the high-precision separation of raw material coal through the dense medium suspension that the income medium mouth was pumped, selects clean coal, middlings and the gangue of comparison pureness.
In some embodiments, the gangue medium removing screen 2, the middlings medium removing screen 4 and the clean coal medium removing screen 5 can adopt banana screens;
the gangue medium removing screen 2 is provided with a high-pressure water spraying device which is used for supplying liquid required by medium removal;
the gangue medium removing screen 2 comprises three sections, wherein the first section is connected with a medium combining barrel to return the screened water of the first section to the medium combining barrel as a medium, the second section is connected with an inlet of a gangue magnetic separator 21 to enable the screened water (namely dilute medium) of the second section to enter the gangue magnetic separator 21, a concentrate outlet of the gangue magnetic separator 21 is connected with the medium combining barrel, tailings of the gangue magnetic separator 21 are connected with a slime water treatment link, the third section is arranged to be a grading section, and a screen gap of the grading section is 13mm to screen an oversize product with the granularity of +13mm, namely block gangue, and an undersize product with the granularity of-13 mm, namely tail gangue.
In some embodiments, medium discharge screen 3 may be a flat medium discharge screen or a trommel screen to pre-de-medium through the flat medium discharge screen or the trommel screen;
the inlets of the two medium discharge sieves are respectively connected with a middling outlet and a clean coal outlet, the oversize product outlets of the two medium discharge sieves 3 are respectively correspondingly connected with an inlet of a middling medium removing sieve 4 and an inlet of a clean coal medium removing sieve 5, and undersize parts of the two medium discharge sieves 3 are respectively connected with a medium combining barrel so as to return screened water of the medium discharge sieves 3 to the medium combining barrel as combined medium.
In some embodiments, a high-pressure water injector is arranged on the medium coal de-mediating screen 4 and is used for supplying liquid required by de-mediating;
the middling medium removing screen 4 comprises three sections, wherein the first section is connected with a medium combining barrel to return screened water of the first section to the medium combining barrel as combined media, the second section is connected with an inlet of a middling magnetic separator 41 to enable screened water (namely dilute media) of the second section to enter the middling magnetic separator 41, a concentrate outlet of the middling magnetic separator 41 is connected with the medium combining barrel, tailings of the middling magnetic separator 41 are connected with a slime water treatment link, the third section is arranged to be a grading section, a screen gap of the grading section is 13mm to screen oversize products with the particle size of +13mm and undersize products with the particle size of-13 mm, an outlet of the undersize products is connected with an inlet of a middling coal centrifuge 42, the middling coal centrifuge 42 is used for separating out slack middling coal products, and the middling centrifuge 42 is further provided with an outlet for discharging a centrifugal liquid.
In some embodiments, a high-pressure water injector is arranged on the clean coal medium removing screen 5 and used for supplying liquid required by medium removing;
the clean coal medium-removing screen 5 comprises three sections, wherein the first section is connected with a medium combining barrel to return the screen underflow of the first section to the medium combining barrel as combined medium, the second section is connected with an inlet of a clean coal magnetic separator 51 to enable the screen underflow of the second section (namely dilute medium) to enter the clean coal magnetic separator 51, a concentrate outlet of the clean coal magnetic separator 51 is connected with the medium combining barrel, tailings of the clean coal magnetic separator 51 are connected with a slime water treatment link, the third section is arranged to be a grading section, a screen gap of the grading section is 13mm to screen oversize products with the granularity of +13mm and undersize products with the granularity of-13 mm, an outlet of the undersize products is connected with an inlet of a clean coal centrifuge 52, the clean coal centrifuge 52 is used for separating out fine clean coal products, and the clean coal centrifuge 52 is also provided with an outlet for discharging centrifugal liquid.
In some embodiments, the oversize product outlets of the middlings and cleaned coal sculping sieves 4 and 5 are both conveyed to the inlet of the crusher 6 through a transfer belt conveyor 8, the upper limit of the discharge particle size of the crusher 6 is not larger than the size of the screen gaps of the middlings and cleaned coal sculping sieves 4 and 5, and the outlet of the crusher 6 is connected with the feeding position of the raw coal belt conveyor 7.
Based on the same inventive concept, the embodiment of the present invention further provides a deep dissociation separation method for high ash content coking coal, as shown in fig. 3, including:
sorting raw material coal through a cyclone, wherein the sorted products comprise, but are not limited to, gangue, middlings and clean coal;
discharging the processed gangue, and discharging the cleaned coal blocks and the middlings obtained after grading treatment of the middlings and the cleaned coal blocks to a crusher for deep crushing and dissociation;
screening out lump coal products with the size above a preset size for deep crushing and dissociation;
the crushed product is returned to the cyclone for re-sorting.
Obviously, because the cyclone is arranged to divide the raw material coal into gangue, middlings and clean coal, the gangue is discharged after being treated, and only the graded middlings and clean coals are deeply crushed and dissociated, the feeding amount of the crusher is reduced by times, so that the cost of the crushing link is reduced, the service life of the crusher is prolonged, the over-crushing of the coal is reduced, and the pressure of a subsequent slime water treatment system is reduced;
because the crushed product is selected again as the raw material coal to be selected, namely the separation degree is increased and then the crushed product is selected, the ash content and the sulfur content of clean coal are effectively reduced, the process is simplified, the recovery rate of the clean coal is improved, the effective recovery of scarce coking coal resources is realized, and the investment and the production operation cost are reduced;
along with the enhancement of the mining degree of coal, the coal quality change is larger, the change of the content of gangue in raw coal is larger, and coking coal with high ash content is more prominent.
In some embodiments, the high ash coking coal deep dissociation separation process further comprises:
and (3) removing impurities and iron from the raw coal, and obtaining the raw coal to be sorted with the upper limit of the granularity of 200 mm.
In some embodiments, discharge after handling the waste rock, the piece cleaned coal and the piece middlings after the classification are discharged to the breaker and are carried out the degree of depth breakage and dissociation, wherein, discharge after handling the waste rock specifically includes:
and (4) performing medium removal, dehydration and classification on the gangue through a gangue medium removal sieve, and then discharging.
In some embodiments, discharge after handling the waste rock, the piece clean coal and the piece middlings are arranged to the breaker and are carried out the degree of depth breakage and dissociate, wherein, the piece clean coal and the piece middlings after the hierarchical processing are arranged to the breaker and are carried out the degree of depth breakage and dissociate, specifically include:
pre-medium removal is carried out on the middling coal and the clean coal through a medium discharge sieve;
medium removing, dehydrating and grading the middlings by a middling medium removing sieve to obtain oversize products with the granularity of +13mm and undersize products with the granularity of-13 mm, wherein the undersize products enter a middling centrifuge to separate out slack middling products;
the cleaned coal is subjected to medium removal, dehydration and classification through a cleaned coal medium removal sieve, so that an oversize product with the particle size of +13mm and an undersize product with the particle size of-13 mm are sieved, wherein the undersize product enters a cleaned coal centrifuge to separate a fine cleaned coal product.
In some embodiments, lump coal products above a predetermined size are screened, wherein the predetermined size is 13 mm.
In order to clearly embody the technical scheme of the invention, the following two comparative examples are combined for explanation:
comparative example 1, as shown in figures 4 and 5:
a. compared with the example 1, the process link of the part A is added, and the process link of pre-discharging the waste rock in the compared example 1 is more conventional in the current coal preparation plant and also has relatively higher separation precision;
b.A the concrete steps of part of the process links are as follows: -200mm of raw material coal is firstly classified by a classifying screen, -less than 13mm of raw material coal enters a non-pressure feeding three-product heavy medium cyclone separation system, 200-13mm of raw material coal enters a heavy medium shallow groove for separation, so that gangue pre-discharge of lump coal is realized, the gangue with the thickness of +13mm is firstly discharged out of the system, and the clean coal with the thickness of +13mm is crushed and then enters the separation system of the non-pressure feeding three-product heavy medium cyclone to realize deep dissociation separation;
c. compared with the invention, the comparative example 1 not only adds the process links, but also adds a medium supplying system of the heavy medium suspension liquid separately, and the medium supplying system comprises: a medium combining barrel, a medium combining pump, a medium supply pipeline, a closed control system and the like;
d. comparative example 1 the total investment and energy consumption were higher relative to the present invention, both in terms of equipment type selection, equipment installed capacity and total floor plan, requiring an increase of nearly 1000 million in equipment investment and civil engineering investment alone.
Comparative example 2, as shown in fig. 6 and 7:
a. compared with the invention, the comparative example 2 increases the process link of the part B, and the comparative example 2 is a relatively simple process link and lower investment cost in the existing coal preparation plant recleaning process;
b.B the method comprises the following steps: the lump clean coal and the lump medium coal are crushed by a lump coal crusher and then transferred into a non-pressure (pressure) three-product heavy medium cyclone which is arranged independently for separation, and clean, medium and gangue products separated by the heavy medium cyclone respectively enter a medium removal and dehydration link of a main selection system for subsequent treatment;
c. compared with the prior art 2, the added process links are relatively simple, but a set of medium supplying system of the heavy medium suspension liquid is still required to be added separately;
d. the investment of the equipment of the comparative example 2 needs to be increased by more than 200 ten thousand compared with the equipment of the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The utility model provides a high ash coking coal degree of depth separation equipment that dissociates which characterized in that includes: the device comprises a cyclone, a gangue medium removal sieve, two medium discharge sieves, a middling medium removal sieve, a clean coal medium removal sieve and a crusher;
the cyclone inlet is used for receiving raw material coal to be sorted, the cyclone is used for sorting the raw material coal, and sorted products comprise gangue, middlings and clean coal;
the gangue outlet of the cyclone is connected with the gangue medium removing sieve, and the gangue medium removing sieve is used for medium removing, dewatering and grading gangue;
the middling outlet and the clean coal outlet of the cyclone are respectively and correspondingly connected with the middling medium removing sieve and the clean coal medium removing sieve through the medium draining sieve, the middling medium removing sieve and the clean coal medium removing sieve respectively perform medium removing, dewatering and grading on middling coal and clean coal, and respectively obtain oversize products, and the oversize product outlets of the middling medium removing sieve and the clean coal medium removing sieve are both connected with the crusher inlet;
the breaker is used for carrying out the degree of depth breakage dissociation to the product piece middlings and the piece cleaned coal of sieving after grading, the exit linkage of breaker the swirler import to select separately the feed coal once more as waiting to select separately the broken product.
2. The apparatus of claim 1, wherein a raw coal belt conveyor is arranged at the cyclone inlet and used for conveying raw coal to be sorted to the cyclone inlet;
raw coal rubber belt conveyor pan feeding position connects preprocessing device, preprocessing device is used for carrying out edulcoration deironing with the raw coal and handles to acquire the granularity upper limit and wait to select separately raw coal for 200mm, raw coal rubber belt conveyor ejection of compact position sets up and falls the case, with through it will wait to select separately raw coal to drop the case leading-in extremely the swirler import.
3. The apparatus of claim 1, wherein said cyclone is a pressureless feed three-product dense medium cyclone.
4. The apparatus of claim 1, wherein the gangue media removing screen, the middling media removing screen and the clean coal media removing screen are all banana screens.
5. The equipment according to claim 1, characterized in that a high-pressure water spraying device is arranged on the gangue medium removal screen and used for supplying liquid required by medium removal;
waste rock demeshing sieve includes the three-section, and wherein, first section and close the bucket connection of beting, in order to incite somebody to action the under-sieve water of first section returns as closing the beting the bucket, second section and waste rock magnet separator entry linkage, so that second section under-sieve water can get into the waste rock magnet separator, wherein, waste rock magnet separator concentrate exit linkage close the bucket, the coal slime water treatment link is connected to waste rock magnet separator tailings, and the third section sets up to the grading section, the grading section crack is 13mm to sieve out the granularity and be +13 mm's oversize product to and the granularity is-13 mm's undersize product.
6. The apparatus of claim 1, wherein the medium discharge screen is a flat medium discharge screen or a curved screen.
7. The apparatus according to claim 1, characterized in that a high-pressure water spray device is arranged on the medium coal de-mediating screen and is used for supplying liquid required by de-mediating;
the middlings medium removing sieve includes the three-section, and wherein, first section and close the bucket and connect, in order to incite somebody to action the under-sieve water of first section returns as closing the medium bucket, second section and middlings magnetic separator entry linkage, so that second section under-sieve water can get into the middlings magnetic separator, wherein, middlings magnetic separator concentrate exit linkage close the bucket, middlings magnetic separator tailings are connected the coal slime water and are handled the link, and the third section sets up to the stage, the stage screen cut is 13mm to sieve out the granularity and be +13 mm's oversize product, and the granularity is-13 mm undersize product, undersize product exit linkage middlings coal centrifuge entry, middlings coal centrifuge is used for separating out terminal middlings coal product, middlings centrifuge still sets up the export that is used for discharging the centrifugate.
8. The apparatus according to claim 1, characterized in that a high-pressure water spray device is arranged on the clean coal de-mediating screen and is used for supplying liquid required by de-mediating;
the clean coal medium removing sieve comprises three sections, wherein a first section is connected with a medium combining barrel, so that the sieve water of the first section returns as a medium combining barrel, a second section is connected with a clean coal magnetic separator inlet, so that the sieve water of the second section can enter the clean coal magnetic separator, wherein a concentrate outlet of the clean coal magnetic separator is connected with the medium combining barrel, the tailings of the clean coal magnetic separator are connected with a slime water treatment link, the third section is arranged to be a grading section, the screen joint of the grading section is 13mm, so that the screened product with the granularity of +13mm is obtained, the screened product with the granularity of-13 mm is obtained, the screened product is obtained, the outlet of the screened product is connected with a clean coal centrifuge inlet, the clean coal centrifuge is used for separating out the end clean coal product, and the clean coal centrifuge is further provided with an outlet for discharging the centrifugal liquid.
9. The apparatus of claim 1, wherein the oversize product outlets of the middlings and cleaned coal sculping sieves are both conveyed to the crusher inlet by a transfer belt conveyor, the upper limit of the discharge particle size of the crusher is not larger than the slot size of the middlings and cleaned coal sculping sieves, and the outlet of the crusher is connected with the raw coal belt conveyor feeding position.
10. A deep dissociation and separation method of high-ash coking coal is characterized by comprising the following steps:
sorting raw material coal through a cyclone, wherein the sorted products comprise gangue, middlings and clean coal;
discharging the processed gangue, and discharging the graded clean coal blocks and medium coal blocks to a crusher for deep crushing and dissociation;
screening out lump coal products with the size above a preset size for deep crushing and dissociation;
returning the crushed product to the cyclone for re-sorting, in some embodiments, a high ash coking coal deep dissociation sorting method, further comprising:
and (3) removing impurities and iron from the raw coal, and obtaining the raw coal to be sorted with the upper limit of the granularity of 200 mm.
11. The method according to claim 10, wherein the gangue is discharged after being processed, and the graded clean coal and middlings are discharged to a crusher for deep crushing and dissociation, wherein the gangue is discharged after being processed, and the method specifically comprises the following steps:
and (3) performing medium removal, dehydration and classification on the gangue through a gangue medium removal sieve, and then discharging two products of lump gangue and tail gangue.
12. The method according to claim 10, wherein the gangue is discharged after being processed, and the graded lump medium coal and lump clean coal are discharged to a crusher for deep crushing and dissociation, wherein the graded lump clean coal and lump medium coal are discharged to the crusher for deep crushing and dissociation, and the method specifically comprises the following steps:
removing media from the clean coal and the middling coal through a medium discharge sieve;
medium removing, dehydrating and grading the middlings by a middling medium removing sieve to obtain oversize products with the granularity of +13mm and undersize products with the granularity of-13 mm, wherein the undersize products enter a middling centrifuge to separate out slack middling products;
the cleaned coal is subjected to medium removal, dehydration and classification through a cleaned coal medium removal sieve to obtain an oversize product with the particle size of +13mm and an undersize product with the particle size of-13 mm, wherein the undersize product enters a cleaned coal centrifuge to separate a fine cleaned coal product.
13. The method of claim 10, wherein the screening out the lump coal product is performed above a predetermined size, wherein the predetermined size is 13mm, but not limited to 13 mm.
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