CN103911506B - The method of wind concurrent heating roasting decarburization is adjusted in a kind of Carbonaceous gold ore lifting - Google Patents
The method of wind concurrent heating roasting decarburization is adjusted in a kind of Carbonaceous gold ore lifting Download PDFInfo
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- CN103911506B CN103911506B CN201410155534.1A CN201410155534A CN103911506B CN 103911506 B CN103911506 B CN 103911506B CN 201410155534 A CN201410155534 A CN 201410155534A CN 103911506 B CN103911506 B CN 103911506B
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- concurrent heating
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000010931 gold Substances 0.000 title claims abstract description 53
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 53
- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005261 decarburization Methods 0.000 title claims abstract description 15
- 238000001354 calcination Methods 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000002386 leaching Methods 0.000 claims abstract description 19
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000567 combustion gas Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 206010037660 Pyrexia Diseases 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005262 decarbonization Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- XKGUKYPCHPHAJL-UHFFFAOYSA-N methanetetracarbonitrile Chemical compound N#CC(C#N)(C#N)C#N XKGUKYPCHPHAJL-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a kind of method that wind concurrent heating roasting decarburization is adjusted in Carbonaceous gold ore lifting, the method uses and a kind of material in roasting facility can be made to kick up the roasting facility that its material at utmost can be come in contact with the air-flow in roasting facility.The present invention arranges lifting blade in calcination rotary kiln, and regulates the temperature (650 DEG C～850 DEG C) in roasting facility and atmosphere (O by the supply air quantity in regulation roasting facility and additional heat2>=20%).The carrying out of roasting process is ensured by regulation roasting time (150min～240min).The inventive method does not use the calcining of the Carbonaceous gold ore roasting technique output of lifting tune wind concurrent heating compared with other, and the cyanide leaching of gold can be greatly improved.
Description
Technical field
The invention belongs to the decarburization production technical field of Carbonaceous gold ore, be specifically related to a kind of method that wind concurrent heating roasting decarburization is adjusted in Carbonaceous gold ore lifting.
Background technology
The Cyanide Leaching of gold is the now widely used technology for gold that carries, and Carbonaceous gold ore exists interference effect due to carbon in the cyanidation-leaching process of gold, has had a strong impact on the leaching rate of golden Cyanide Leaching, and therefore Carbonaceous gold ore must carry out decarburization roasting before Cyanide Leaching.The purpose of gold mine roasting is the harmful element that gold process is smelted in removing, also includes that sulfur, arsenic etc., the most industrialized gold mine roasting technique mainly have: rotary kiln baking, Flash Smelting Furnace roasting, boiling roaster etc. beyond de-carbon.The industrialization of these roasting techniques is mainly used in (sulfur-bearing, arsenic) desulfurization of gold mine, dearsenization roasting, in the industrialization report of Carbonaceous gold ore decarburization roasting only shows " non-ferrous metal engineering " magazine in April, 2012, in paper " certain contains charcoal gold mine roasting expanding test design and the interpretation of result " literary composition i.e. write by the author.This project is gone into operation at the beginning of 2013, owing to designed decarbonization process system is to use traditional rotary kiln baking, can not effectively regulate the temperature in kiln and atmosphere, the gold mine material being difficult to ensure that in kiln is fully contacted with air-flow, cause roasting technique effect unsatisfactory, the golden calcining of Carbonaceous gold ore roasting output leaching rate of gold in cyanidation-leaching process is the most undesirable, and therefore the decarburization roasting technique innovation for Carbonaceous gold ore is imperative.
And applicant finds individually to use adjust wind or individually use concurrent heating in realizing the Carbonaceous gold ore industrialized production process of decarburization calcination rotary kiln, or individually use lifting, or the operation combined two-by-two can not meet production requirement.
Summary of the invention
It is contemplated that overcome the deficiencies in the prior art, it is provided that the method for roasting of a kind of Carbonaceous gold ore.
In order to achieve the above object, the technical scheme that the present invention provides is:
Described Carbonaceous gold ore lifting adjusts the method for wind concurrent heating roasting decarburization to comprise the steps:
(1) Carbonaceous gold ore is crushed to granularity≤8mm, obtains the material of roasting；Corning ore deposit after powdery to be worn into for dense form Carbonaceous gold ore；
(2) material is added roasting in calcination rotary kiln；
Described calcination rotary kiln is provided with lifting blade；Material in calcination rotary kiln is kicked up and is made material straight line fall to calcination rotary kiln after peak by lifting blade, material and air flow contacts in calcination rotary kiln；
When in calcination rotary kiln, temperature is less than 620～850 DEG C, to carrying out concurrent heating in calcination rotary kiln, when in calcination rotary kiln, temperature is higher than 620～850 DEG C, carry out adjusting wind in calcination rotary kiln；As O in calcination rotary kiln kiln exhaust gas atmosphere2When≤19.5%, carry out equally adjusting wind in calcination rotary kiln, make O2>=20%；
Wherein, described tune elegance straight tube wind form or the leeward form of kiln: described straight tube wind form be calcination rotary kiln kiln hood and kiln tail be respectively provided with air feed straight tube to calcination rotary kiln in carry out adjust wind；The leeward form of described kiln is to install blower fan at calcination rotary kiln kiln back, by blower fan to carrying out in calcination rotary kiln adjusting wind；
Described concurrent heating uses combustion gas concurrent heating mode or hot blast concurrent heating mode: described combustion gas concurrent heating mode is that coal gas or natural gas combustion nozzle are arranged on the one or both ends of calcination rotary kiln, by the gas flow of regulation burner to carrying out concurrent heating in calcination rotary kiln；Described hot blast concurrent heating mode is to utilize the hot blast of output in production system or construction fever furnace system output hot blast to carrying out concurrent heating in calcination rotary kiln；
(3) make the discharge end rushing calcination rotary kiln through the material of roasting flow out, after cooling, enter Cyanide Leaching operation (Cyanide Leaching operation is this area routine techniques means).
Preferably, the described material time of staying in calcination rotary kiln is 150min～240min.
Preferably, the described material time of staying in calcination rotary kiln is 180min～240min.
The time of staying determines with roasting effect.
Preferably, step (2) described set temperature value is 620～780 DEG C.
Preferably, described calcination rotary kiln includes cylinder of rotary kiln, kiln end sealing device, kiln head cover, primary ignition fuel burner nozzle, secondary air device in kiln body, temperature measuring equipment, power transmission slip-ring device and the support roller supporting being located at bottom rotary kiln；Described cylinder of rotary kiln is provided with the sleeve pipe being passed through in kiln；Being provided with by sleeve pipe the fixing post that stretches in kiln in described sleeve pipe, fixing have annular space between post and sleeve pipe；One end that described fixing post stretches out outside cylinder of rotary kiln is stretched out with sleeve pipe in the one end outside cylinder of rotary kiln is connected；Described one end stretching in cylinder of rotary kiln of fixing is provided with lifting blade.
Preferably, described fixing post includes fixing post body and fixing post external end head；The diameter of described fixing post external end head is more than the diameter of fixing post body；Described fixing post external end head is with telescopic joint.
Preferably, described fixing post external end head is provided with adjusting pad with the junction of sleeve pipe.
Preferably, it is filled with heat-barrier material in the annular space between described fixing post and sleeve pipe.
Wherein, described cylinder of rotary kiln, kiln end sealing device, kiln head cover, primary ignition fuel burner nozzle, secondary air device in kiln body, temperature measuring equipment is identical with rotary kiln described in Chinese patent ZL200820159159.8 with the structure of power transmission slip-ring device.
Below in conjunction with principle, the invention will be further described:
In the course of industrialization extracted gold from using Carbonaceous gold ore as the raw material of gold smelting, due to the existence severe jamming of the carbon Cyanide Leaching of gold mine in gold mine, thus have influence on the response rate of gold, therefore Carbonaceous gold ore must be carried out decarburization calcination process, just can carry out follow-up Cyanide Leaching and extract gold from.
Carbon containing roasting process is the carbon contained by gold mine and the course of reaction of oxygen in air, and therefore its decarbonization degree (carbon-drop rate) is relevant with the atmosphere in the air quantity delivered of calcination vessel and container.
Carbon contained in Carbonaceous gold ore must be carried out with the decarburization of the course of reaction gold mine of oxygen in air within the regular hour, and therefore its decarbonization degree (carbon-drop rate) is relevant with gold mine residence time in calcination vessel.
Carbon contained in Carbonaceous gold ore and the course of reaction of oxygen in air must carry out can be only achieved it most preferably within the temperature range of certain, and therefore its decarbonization degree (carbon-drop rate) is relevant with gold mine temperature range in calcination vessel.
Consideration based on above-mentioned factor, the present invention is additionally arranged lifting blade in traditional calcination rotary kiln, it is ensured that the gold mine material in rotary kiln can be fully contacted with air-flow.Secondly, the present invention is additionally arranged tune wind heat patching device outside traditional calcination rotary kiln, and includes the control adjusting wind heat patching device in computer-controlled program, can realize regulating air quantity and heat according to the concrete condition in kiln.Adjusting wind action to have two, one is the atmosphere in regulation kiln；Another be kiln temperature too high time, add cold wind reduce kiln temperature regulate the temperature in kiln；The effect of concurrent heating is that when kiln temperature is too low, additional heat raises kiln temperature to the temperature regulating in kiln, it is ensured that the carbon in stone Carbonaceous gold ore generates carbon dioxide in desirable temperature range and volatilized.
Wherein, louver can use two kinds of forms: 1. straight tube wind form, situation air feed in i.e. device air feed straight tube is directly according to kiln respectively at kiln hood and kiln tail, the shortcoming of this air feed form is that air feed point is few, air feed effect is undesirable, and its advantage is reduced investment, is typically only used for rotary furnace roasting.2. the leeward form of kiln, i.e. installs blower fan at kiln back, and according to situation in kiln by kiln leeward machine air feed, the advantage of this form is to be arranged as required to multiple air feed point, and air feed is satisfactory for result and is not affected by kiln length；Shortcoming is higher compared with the investment of straight tube wind form.
Heat patching device can take following form: 1. combustion gas concurrent heating, combustion gas concurrent heating is to carry out concurrent heating with combustion gas for thermal source, coal gas or natural gas combustion nozzle are generally arranged on the one or both ends of calcining kiln, and the flow opening and regulating its combustion gas according to the concrete condition of roasting carries out concurrent heating.2. hot blast concurrent heating, the concurrent heating i.e. utilizing the hot blast of output in production system or construction fever furnace system output hot blast to carry out Carbonaceous gold ore decarburization roasting process is referred to as hot blast concurrent heating.
Only coordinate carry out being additionally arranged tune wind heat patching device outside the lifting blade in rotary kiln baking facility and rotary kiln baking facility, and control the rotating speed (0～the rotating speed of motor nameplate) of calcining kiln to be only possible to reach preferable roasting effect in the case of reaching to control the purpose of roasting time with buncher.
In a word, the present invention uses and a kind of material in roasting facility can be made to kick up the roasting facility that its material at utmost can be come in contact with the air-flow in roasting facility.The present invention arranges lifting blade in calcination rotary kiln, and is combined with adjusting wind heat patching device by this calcination rotary kiln, regulates the temperature (650 DEG C～850 DEG C) in roasting facility and atmosphere (O by the supply air quantity in regulation roasting facility and additional heat2>=20%).The carrying out of roasting process is ensured by regulation roasting time (150min～240min).The inventive method does not use the calcining of the Carbonaceous gold ore roasting technique output of lifting tune wind concurrent heating compared with other, and the cyanide leaching of gold can be greatly improved.
Accompanying drawing explanation
Fig. 1 is the structure chart of calcination rotary kiln of the present invention；
Fig. 2 is the A-A profile (lifting blade) of Fig. 1；
Fig. 3 is partial enlarged drawing at the I of Fig. 2.
In figure, 1, cylinder of rotary kiln；2, kiln end sealing device；3, kiln head cover；4, primary ignition fuel burner nozzle；5, secondary air device in kiln body；6, temperature measuring equipment；7, power transmission slip-ring device；8, support roller supporting；9, lifting blade；10, fix；11, sleeve pipe；12, adjusting pad；13, fixing post body；14, fixing post external end head；15, air compensation device.
Detailed description of the invention
Embodiment
1
Described Carbonaceous gold ore lifting adjusts the method for wind concurrent heating roasting decarburization to comprise the steps:
(1) Carbonaceous gold ore is crushed to granularity≤8mm, obtains the material of roasting；Corning ore deposit after powdery to be worn into for dense form Carbonaceous gold ore；
(2) after being measured by feeder, material is added roasting in calcination rotary kiln；Calcination rotary kiln rotating speed controls to reach to control the material time of staying in kiln in kiln by frequency control motor.If the time of staying need to be shortened, just improve the rotating speed of kiln, make the material speed that moves down in kiln accelerate；Otherwise then reduce the rotating speed of kiln, move down speed in making material kiln and slow down；
Described calcination rotary kiln is provided with lifting blade 9；Material in calcination rotary kiln is kicked up and is made material straight line fall to calcination rotary kiln after peak by lifting blade, material and air flow contacts in calcination rotary kiln；
Material in calcination rotary kiln is kicked up and is made material straight line fall to calcination rotary kiln after peak by lifting blade 9, and material is fully contacted with air-flow in calcination rotary kiln；
When in calcination rotary kiln, temperature is less than 620～850 DEG C, to carrying out concurrent heating in calcination rotary kiln, when in calcination rotary kiln, temperature is higher than 620～850 DEG C, carry out adjusting wind in calcination rotary kiln；As O in calcination rotary kiln kiln exhaust gas atmosphere2When≤19.5%, carry out equally adjusting wind in calcination rotary kiln, make O2>=20%；
Wherein, described tune elegance straight tube wind form or the leeward form of kiln: described straight tube wind form be calcination rotary kiln kiln hood and kiln tail be respectively provided with air feed straight tube to calcination rotary kiln in carry out adjust wind；The leeward form of described kiln is to install blower fan at calcination rotary kiln kiln back, by blower fan to carrying out in calcination rotary kiln adjusting wind；
Described concurrent heating uses combustion gas concurrent heating mode or hot blast concurrent heating mode: described combustion gas concurrent heating mode is that coal gas or natural gas combustion nozzle are arranged on the one or both ends of calcination rotary kiln, by the gas flow of regulation burner to carrying out concurrent heating in calcination rotary kiln；Described hot blast concurrent heating mode is to utilize the hot blast of output in production system or construction fever furnace system output hot blast to carrying out concurrent heating in calcination rotary kiln；
(3) make the discharge end rushing calcination rotary kiln through the material of roasting flow out, after the cooling of cooled cylindrical machine, be transported to Cyanide Leaching operation by belt conveyer.
Wherein, described calcination rotary kiln includes cylinder of rotary kiln 1, kiln end sealing device 2, kiln head cover 3, primary ignition fuel burner nozzle 4, secondary air device 5 in kiln body, temperature measuring equipment 6, power transmission slip-ring device 7 and the support roller supporting 8 being located at bottom rotary kiln；Described cylinder of rotary kiln 1 is provided with the sleeve pipe 11 being passed through in kiln；Being provided with by sleeve pipe 11 the fixing post 10 that stretches in kiln in described sleeve pipe 11, fixing have annular space between post 10 and sleeve pipe 11；One end that described fixing post 10 stretches out outside cylinder of rotary kiln 1 is stretched out with sleeve pipe 11 in the one end outside cylinder of rotary kiln 1 is connected；Described fix 10 and stretch into the one end in cylinder of rotary kiln 1 and be provided with lifting blade 9.
Described fixing post 10 includes fixing post body 13 and fixing post external end head 14；The diameter of described fixing post external end head 14 is more than the diameter of fixing post body 13；Described fixing post external end head 14 is connected with sleeve pipe 11.Described fixing post external end head 14 is provided with adjusting pad 12 with the junction of sleeve pipe 11.It is filled with heat-barrier material in annular space between described fixing post 10 and sleeve pipe 11.
And adjust wind not consider in the engineering design of concurrent heating only considered, kiln not can drive；Carrying out at the same time in the engineering design of tune wind and concurrent heating, although kiln drives, but its effect is unsatisfactory, and its cyanide leaching only has about 30%；And the present invention uses lifting, adjusts wind and concurrent heating simultaneously, after lifting, adjusting wind, concurrent heating roasting, its cyanide leaching reaches more than 50%, say, that add more than 10%.The inventive method drastically increases the golden calcining of Carbonaceous gold ore roasting output leaching rate of gold in cyanidation-leaching process.
Claims (7)
1. the method that wind concurrent heating roasting decarburization is adjusted in a Carbonaceous gold ore lifting, it is characterised in that described method comprises the steps:
(1) Carbonaceous gold ore is crushed to granularity≤8mm, obtains the material of roasting；
(2) material is added roasting in calcination rotary kiln；
Described calcination rotary kiln includes cylinder of rotary kiln (1), kiln end sealing device (2), kiln head cover (3), primary ignition fuel burner nozzle (4), secondary air device (5) in kiln body, temperature measuring equipment (6), power transmission slip-ring device (7) and be located at bottom rotary kiln support roller supporting (8)；Described cylinder of rotary kiln (1) is provided with the sleeve pipe (11) being passed through in kiln；Being provided with by sleeve pipe (11) the fixing post (10) that stretches in kiln in described sleeve pipe (11), fixing have annular space between post (10) and sleeve pipe (11)；Described fixing post (10) is stretched out cylinder of rotary kiln (1) one end outward and is stretched out cylinder of rotary kiln (1) one end outward with sleeve pipe (11) and be connected；Described fix (10) are stretched into the one end in cylinder of rotary kiln (1) and are provided with lifting blade (9)；Material in calcination rotary kiln is kicked up and is made material straight line fall to calcination rotary kiln after peak by lifting blade (9), material and air flow contacts in calcination rotary kiln；
When in calcination rotary kiln, temperature is less than 620～850 DEG C, to carrying out concurrent heating in calcination rotary kiln, when in calcination rotary kiln, temperature is higher than 620～850 DEG C, carry out adjusting wind in calcination rotary kiln；As O in calcination rotary kiln kiln exhaust gas atmosphere2When≤19.5%, carry out equally adjusting wind in calcination rotary kiln, make O2>=20%；
Wherein, described tune elegance straight tube wind form or the leeward form of kiln: described straight tube wind form be calcination rotary kiln kiln hood and kiln tail be respectively provided with air feed straight tube to calcination rotary kiln in carry out adjust wind；The leeward form of described kiln is to install blower fan at calcination rotary kiln kiln back, by blower fan to carrying out in calcination rotary kiln adjusting wind；
Described concurrent heating uses combustion gas concurrent heating mode or hot blast concurrent heating mode: described combustion gas concurrent heating mode is that coal gas or natural gas combustion nozzle are arranged on the one or both ends of calcination rotary kiln, by the gas flow of regulation burner to carrying out concurrent heating in calcination rotary kiln；Described hot blast concurrent heating mode is to utilize the hot blast of output in production system or construction fever furnace system output hot blast to carrying out concurrent heating in calcination rotary kiln；
(3) make the discharge end rushing calcination rotary kiln through the material of roasting flow out, after cooling, enter Cyanide Leaching operation.
2. the method for claim 1, it is characterised in that the described material time of staying in calcination rotary kiln is 150min～240min.
3. method as claimed in claim 2, it is characterised in that the described material time of staying in calcination rotary kiln is 180min～240min.
4. the method for claim 1, it is characterised in that in step (2) described calcination rotary kiln, set temperature value is 620～780 DEG C.
5. the method for claim 1, it is characterised in that described fixing post (10) includes fixing post body (13) and fixing post external end head (14)；The diameter of described fixing post external end head (14) is more than the diameter of fixing post body (13)；Described fixing post external end head (14) is connected with sleeve pipe (11).
6. method as claimed in claim 5, it is characterised in that described fixing post external end head (14) is provided with adjusting pad (12) with the junction of sleeve pipe (11).
7. method as claimed in claim 6, it is characterised in that be filled with heat-barrier material in the annular space between described fixing post (10) and sleeve pipe (11).
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2014
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