CN115747478B - Method for realizing gas recycling in cobalt production process - Google Patents
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Abstract
The invention relates to a method for realizing gas recycling in a cobalt production process, and belongs to the technical field of cobalt production. The method comprises the steps of (1) carrying out sulfating roasting leaching on the pyrite containing cobalt after flotation to prepare tailings and a mixed solution A, extracting the mixed solution A through P204 and P507 in sequence to obtain a cobalt chloride solution, wherein one part of cobalt chloride is subjected to electrolytic deposition of cobalt, and the other part of cobalt chloride is subjected to precipitation of cobalt carbonate and calcination to prepare cobalt powder; the calcined gas heat is used for water immersion heating, and sulfur dioxide in the gas and reduction leaching are used for preparing sulfuric acid; heating ammonium chloride crystals by using the calcination heat of cobalt carbonate to generate ammonia gas, hydrogen chloride and water vapor, preparing sulfuric acid by the water vapor, using solvent water for reuse water in a water leaching step, using the ammonia gas for saponification of a lean organic phase and preparing ammonium bicarbonate by carbon dioxide generated by calcination, and using the hydrogen chloride for back extraction of a cobalt-containing organic phase; hydrogen generated by electrolysis is used for reduction when cobalt carbonate is calcined; the whole process fully utilizes the heat energy of gas, and partial byproducts are returned to the process for utilization, so that the energy is saved and the environment is protected.
Description
Technical Field
The invention belongs to the technical field of cobalt production, and relates to a method for realizing gas recycling in a cobalt production process.
Background
Cobalt is an important strategic resource, plays an important role in the fields of national defense, high-tech fields such as lithium batteries and the like, and the value of cobalt is continuously increased along with the rising of new energy automobiles in recent years, so that the development of the cobalt resource has a larger economic value, and along with the increasing exhaustion of the cobalt resource, people are required to intensively study and develop the process of low-grade cobalt-containing ores. The cobalt ore in the nature is rarely singly existed and is mainly accompanied in nickel ore, copper ore, pyrite and arsenic ore deposit, the content is less, the extraction is relatively difficult, the cobalt ore resources mainly comprise nickel cobalt sulfide ore and oxidized ore, copper cobalt ore, arsenic cobalt ore and cobalt-containing pyrite, and the cobalt smelting characteristics are characterized by low grade of raw materials, long extraction flow and more extraction methods.
The traditional process for extracting cobalt from cobalt-containing pyrite is as follows: the cobalt-containing pyrite is subjected to flotation to prepare cobalt-sulfur concentrate, and the cobalt-sulfur concentrate is subjected to sulfating roasting to convert valuable elements such as cobalt, nickel, copper and the like into soluble sulfate, and the roasted product is subjected to water leaching or acid leaching to convert the cobalt, nickel, copper and the like into solution. Purifying the leaching solution to remove impurities such as copper, zinc and the like, separating nickel and cobalt to obtain a pure cobalt solution, and electrodepositing to produce metallic cobalt. However, in the traditional process, a large amount of heat in steam generated by roasting is not fully utilized, waste is caused, and a large amount of electric energy is consumed by preparing cobalt by an electro-deposition method, meanwhile, the recovery of chlorine generated in the process of preparing cobalt by the electro-deposition method is also a problem to be solved, and a large amount of waste liquid is generated in the step of purifying leaching liquid, so that the problem of environmental pollution exists. Therefore, research and improvement on the process for preparing cobalt from cobalt-containing pyrite fully utilizes steam and heat energy generated in the process, promotes the whole process to reduce external emission, saves energy and protects environment, and is a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for realizing gas recycling in the cobalt production process, and belongs to the technical field of cobalt production. The method comprises the steps of carrying out sulfating roasting leaching on pyrite containing cobalt after flotation to prepare tailings containing ferric oxide and a mixed solution A, extracting the mixed solution A by P204 and P507 to obtain a cobalt chloride solution, carrying out electrolytic deposition on one part of the cobalt chloride solution to prepare cobalt, and further calcining the other part of the cobalt chloride solution to precipitate cobalt carbonate in a hydrogen atmosphere to prepare cobalt powder; the heat of the gas calcined by the pyrite containing cobalt is used for heating in the water leaching treatment step, and the sulfur trioxide, sulfur dioxide and water vapor in the gas are used for preparing sulfuric acid and reducing the water leaching to prepare sulfuric acid for use in the return process; heating ammonium chloride crystals by using heat of cobalt carbonate calcination to generate ammonia gas, hydrogen chloride and water vapor, wherein the water vapor is used for preparing sulfuric acid, the ammonia gas is used for saponification of a lean organic phase and preparing ammonium bicarbonate by carbon dioxide generated by the cobalt carbonate calcination, the hydrogen chloride is used for back extraction of a cobalt-containing organic phase, and solvent water in an ammonium chloride solution is used for reuse water in a water leaching step; hydrogen generated in the electrolysis process is used for reducing the calcination of cobalt carbonate; the whole process fully utilizes the heat energy of the gas, and simultaneously, part of byproducts are returned to the process for utilization, so that the energy is saved and the environment is protected.
The aim of the invention can be achieved by the following technical scheme:
a method for realizing gas recycling in a cobalt production process, comprising the following steps:
(1) Preparing cobalt-sulfur concentrate from cobalt-containing pyrite through floatation, uniformly mixing the cobalt-sulfur concentrate with sulfuric acid solution, and roasting in a roasting furnace to generate calcine, smoke dust and gas containing sulfur dioxide, sulfur trioxide and water vapor after roasting;
(2) Discharging the calcine, adding reuse water for water leaching treatment, and filtering to obtain tailings with ferric oxide as a main component and mixed solution A containing cobalt sulfate, nickel sulfate, copper sulfate and zinc sulfate;
(3) Extracting the mixed solution A by using P204 extraction equipment to obtain mixed solution B containing cobalt sulfate and nickel sulfate and a loaded organic phase 1 containing copper ions, zinc ions and the like;
(4) Adding sulfuric acid solution into the loaded organic phase 1 to wash cobalt to obtain a mixed solution C containing a small amount of cobalt sulfate and nickel sulfate, and a loaded organic phase 2 containing copper ions, zinc ions and the like, adding sulfuric acid into the loaded organic phase 2 to carry out back extraction to obtain a mixed solution D containing copper sulfate and zinc sulfate and a lean organic phase 1, wherein the mixed solution D is used for recovering copper and zinc, and the lean organic phase 1 is continuously used for extraction by P204 extraction equipment after alkali saponification;
(5) Extracting the mixed solution B obtained in the step (3) and the mixed solution C obtained in the step (4) through P507 extraction equipment to obtain a cobalt-containing organic phase and a raffinate containing nickel sulfate, wherein the raffinate is used for recovering nickel;
(6) The cobalt-containing organic phase is added into a hydrochloric acid solution for back extraction to obtain a cobalt chloride solution and an organic phase 2, and the organic phase 2 is added with alkali for saponification and then is continuously used for extraction by P507 extraction equipment;
(7) Preparing cobalt from a part of cobalt chloride solution by an electrolytic deposition method, and simultaneously generating chlorine and a small amount of byproduct hydrogen;
(8) And adding the other part of cobalt chloride solution into ammonium bicarbonate solution to prepare precipitated cobalt carbonate, generating ammonium chloride solution simultaneously, filtering, and placing the cobalt carbonate into a calciner to calcine in a hydrogen atmosphere to prepare cobalt powder.
The main element contents in cobalt-sulfur concentrate obtained by flotation of cobalt-containing pyrite are shown in the following table 1:
TABLE 1 content of main elements in cobalt-sulfur concentrate
| Sequence number | Element(s) | Content (%) |
| 1 | Co | 0.628 |
| 2 | Ni | 0.059 |
| 3 | Cu | 0.921 |
| 4 | Fe | 31.947 |
| 5 | S | 33.452 |
| 6 | Zn | 0.024 |
| 7 | H 2 O | 0.352 |
As a preferable technical scheme of the invention, the roasting temperature in the step (1) is 610-630 ℃ and the roasting time is 2-4h. After the optimized temperature and time roasting, the iron element in the cobalt-sulfur concentrate is converted into ferric oxide, the sulfur element is oxidized into sulfur dioxide and sulfur trioxide to enter smoke dust and gas, and the water in the cobalt-sulfur concentrate is converted into water vapor to enter the gas.
As a preferable technical scheme of the invention, the temperature of the water leaching treatment in the step (2) is 70-90 ℃, the water leaching treatment time is 4-6h, the liquid-solid ratio of the water leaching treatment is 2-4:1, and water vapor generated in the water leaching process is used for preparing sulfuric acid. The roasted product is subjected to a water leaching step to obtain tailings and a mixed solution A, ferric oxide enters the tailings, and the mixed solution A contains cobalt ions, nickel ions, copper ions, zinc ions and the like.
As a preferable technical scheme of the invention, the electrowinning method in the step (7) has a current density of 300-400A/m 2 The cell voltage is 2-3V.
As a preferable technical scheme of the invention, the calcination temperature of the cobalt carbonate in the step (8) in the hydrogen atmosphere is 400-600 ℃ and the calcination time is 3-5h.
As a preferable technical scheme of the invention, a heat exchanger 1 is arranged outside the roasting furnace in the step (1), high-temperature smoke dust and gas generated in the roasting process are replaced by low-temperature smoke dust and gas, the low-temperature smoke dust and gas comprises smoke dust, sulfur trioxide, sulfur dioxide and water vapor, the smoke dust is collected through cyclone, cloth bags and electric dust collection, and the sulfur trioxide and the sulfur dioxide are used for preparing sulfuric acid through catalytic oxidation and the water vapor; the heat exchanger 1 replaces low temperature reuse water with high temperature reuse water for water leaching in step (2), which is carried out in a reaction kettle with a coil device.
As a preferable technical scheme of the invention, the sulfuric acid prepared from sulfur trioxide, sulfur dioxide and water vapor is used for washing cobalt by the loaded organic phase 1 and back-extracting by the loaded organic phase 2 in the step (4) and roasting in the step (1) after being purified.
As a preferable technical scheme of the invention, chlorine generated in the electrolytic deposition process in the step (7) is collected and used for leaching, oxidizing and removing impurities.
As a preferable technical scheme of the invention, the byproduct hydrogen in the step (7) is collected and then used for preparing cobalt powder by calcining cobalt carbonate in the step (8).
As a preferred technical scheme of the invention, a heat exchanger 2 is arranged outside the calciner in the step (8), high-temperature carbon dioxide gas generated after the cobalt carbonate is calcined is replaced by low-temperature carbon dioxide gas through the heat exchanger 2, the low-temperature ammonium chloride solution is replaced by high-temperature ammonium chloride solution through the heat exchanger 2, the decomposition of ammonium chloride crystals is promoted to generate ammonia gas, hydrogen chloride and water vapor, the water vapor is used for preparing sulfuric acid, the ammonia gas is used for the alkaline saponification of the lean organic phase 1 in the step (4) and the alkaline saponification of the lean organic phase 2 in the step (6), and the ammonium bicarbonate is prepared by the carbon dioxide generated by the cobalt carbonate calcination, the hydrogen chloride is dissolved in water to prepare hydrochloric acid solution for the back extraction of the cobalt-containing organic phase in the step (6), and the solvent water in the ammonium chloride solution is used for the reuse water of the water leaching step.
The invention has the beneficial effects that:
(1) The invention replaces high-temperature smoke dust and gas generated in the roasting process with low-temperature smoke dust and gas through the heat exchanger 1, the heat is used for replacing low-temperature reuse water with high-temperature reuse water for water leaching treatment in the step (2), the heat generated in the roasting process is fully utilized, and meanwhile, the stability of the temperature in the roasting furnace is controlled;
(2) The sulfuric acid prepared from the sulfur trioxide, the sulfur dioxide and the water vapor generated in the roasting process is purified and then used for carrying the organic phase 1 to wash cobalt and carrying the organic phase 2 to back extract in the step (4) and roasting in the step (1), so that the outward emission of harmful gases is prevented, raw materials are saved for the subsequent cobalt washing, back extraction and front-end roasting steps, and the method is energy-saving and environment-friendly;
(3) The chlorine generated in the electrolytic deposition process is collected and is used for leaching, oxidizing and removing impurities, so that the emission of harmful gases is reduced, meanwhile, hydrogen chloride is generated in the decomposition process of ammonium chloride crystals, and is dissolved in water to prepare hydrochloric acid solution for back extraction of the cobalt-containing organic phase in the step (6), so that the emission of waste liquid is reduced, and meanwhile, raw materials are provided for the subsequent back extraction process;
(4) The ammonia gas generated by the decomposition of the ammonium chloride crystal is used for the alkali adding saponification of the lean organic phase 1 in the step (4) and the alkali adding saponification of the lean organic phase 2 in the step (6), and the ammonia gas and the carbon dioxide generated by the calcination of the cobalt carbonate are prepared into ammonium bicarbonate to be recycled in the process, so that the emission of waste liquid is reduced, and the saponification and the regeneration of the lean organic phase extracted by the subsequent P204 extraction and the saponification and the regeneration of the lean organic phase extracted by the P507 extraction are promoted;
(5) The invention uses the vapor generated in the water leaching step and the vapor generated by the decomposition of ammonium chloride crystal to prepare sulfuric acid, and the sulfuric acid is reused in the process after purification; the solvent water in the ammonium chloride solution is used for reuse water in the water leaching step, so that water waste is avoided, and water resources are saved;
(6) According to the invention, the heat of carbon dioxide gas generated in the calcination process of the cobalt carbonate is replaced by the heat exchanger 2, and the heat is used for preparing ammonia and hydrogen chloride by decomposing ammonium chloride crystals, so that the heat recycling is realized, and the energy is saved and the environment is protected.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description will refer to the specific embodiments, structures, features and effects according to the present invention in conjunction with examples.
Example 1
A method for realizing gas recycling in a cobalt production process, comprising the following steps:
(1) Preparing cobalt-sulfur concentrate from cobalt-containing pyrite through flotation, uniformly mixing the cobalt-sulfur concentrate and sulfuric acid solution, and then placing the mixture in a roasting furnace for roasting at 620 ℃ for 3 hours, wherein calcine and smoke dust and gas containing sulfur dioxide, sulfur trioxide and water vapor are generated after roasting, iron element in the cobalt-sulfur concentrate is converted into ferric oxide, sulfur element is oxidized into sulfur trioxide and sulfur dioxide enters the smoke dust and gas, and moisture in the cobalt-sulfur concentrate is converted into water vapor to enter the gas;
(2) Discharging calcine, adding reuse water, and performing water leaching treatment at 80 ℃ for 5 hours, wherein the water leaching treatment is performed in a reaction kettle with a coil pipe device, the water leaching solid-liquid ratio is controlled to be 3:1, and filtering is performed to obtain tailings with main components of ferric oxide and a mixed solution A containing cobalt sulfate, nickel sulfate, copper sulfate and zinc sulfate; a heat exchanger 1 is arranged outside the roasting furnace, high-temperature smoke dust and gas generated in the roasting process are replaced by low-temperature smoke dust and gas, the low-temperature smoke dust and gas comprises smoke dust, sulfur trioxide, sulfur dioxide and water vapor, the smoke dust is collected through cyclone, cloth bags and electric dust collection, and the sulfur trioxide and the sulfur dioxide are used for preparing sulfuric acid through catalytic oxidation and the water vapor; the heat exchanger 1 replaces low-temperature reuse water with high-temperature reuse water for water leaching treatment in the step (2); the sulfuric acid prepared from sulfur trioxide, sulfur dioxide and water vapor is used for washing cobalt by the loaded organic phase 1 and back extraction by the loaded organic phase 2 in the step (4) and roasting in the step (1) after being purified;
(3) Extracting the mixed solution A by using P204 extraction equipment to obtain mixed solution B containing cobalt sulfate and nickel sulfate and a loaded organic phase 1 containing copper ions, zinc ions and the like;
(4) Adding sulfuric acid solution into the loaded organic phase 1 to wash cobalt to obtain a mixed solution C containing a small amount of cobalt sulfate and nickel sulfate, and a loaded organic phase 2 containing copper ions, zinc ions and the like, adding sulfuric acid into the loaded organic phase 2 to carry out back extraction to obtain a mixed solution D containing copper sulfate and zinc sulfate and a lean organic phase 1, wherein the mixed solution D is used for recovering copper and zinc, and the lean organic phase 1 is continuously used for extraction by P204 extraction equipment after alkali saponification;
(5) Extracting the mixed solution B obtained in the step (3) and the mixed solution C obtained in the step (4) through P507 extraction equipment to obtain a cobalt-containing organic phase and a raffinate containing nickel sulfate, wherein the raffinate is used for recovering nickel;
(6) The cobalt-containing organic phase is added into a hydrochloric acid solution for back extraction to obtain a cobalt chloride solution and an organic phase 2, and the organic phase 2 is added with alkali for saponification and then is continuously used for extraction by P507 extraction equipment;
(7) Cobalt is prepared from 78% cobalt chloride solution by electrolytic deposition method, and the current density is controlled to be 350A/m 2 The tank voltage is 3V, and chlorine and a small amount of byproduct hydrogen are generated at the same time, and the chlorine is used for leaching, oxidizing and removing impurities after being collected; after the hydrogen is collected, the hydrogen is used forCalcining cobalt carbonate in the step (8) to prepare cobalt powder;
(8) Adding an ammonium bicarbonate solution and a nucleating agent into a cobalt chloride solution with the concentration of 22 percent to prepare precipitated cobalt carbonate, generating an ammonium chloride solution at the same time, filtering, taking the cobalt carbonate, and placing the cobalt carbonate into a calciner to calcine for 4 hours at the temperature of 500 ℃ in a hydrogen atmosphere to prepare cobalt powder; the calcination furnace is externally provided with a replacement heater 2, high-temperature carbon dioxide gas generated after the cobalt carbonate is calcined is replaced by low-temperature carbon dioxide gas through the heat exchanger 2, the low-temperature ammonium chloride solution is replaced by high-temperature ammonium chloride solution through the heat exchanger 2 after the catalyst is added, so that ammonium chloride crystals are decomposed to generate ammonia gas, hydrogen chloride and water vapor, the ammonia gas is used for alkali-adding saponification of the lean organic phase 1 in the step (4) and alkali-adding saponification of the lean organic phase 2 in the step (6) and carbon dioxide generated by the cobalt carbonate calcination to prepare ammonium bicarbonate, the hydrogen chloride is dissolved in water to prepare hydrochloric acid solution for back extraction of the cobalt-containing organic phase in the step (6), the water vapor is used for preparing sulfuric acid, and solvent water in the ammonium chloride solution is used for reuse water in the water leaching step.
The project of the embodiment realizes 50 ten thousand yuan of total investment, and the actual test operation is calculated to utilize 326.47t of water vapor in cobalt-sulfur concentrate annually; the water 7412.3t can be saved in year, the annual yield of sulfur dioxide 8975.35t in the roasting stage of cobalt-sulfur concentrate, and the utilization rate of the sulfur dioxide reaches 98.5%; preparing annual chlorine 684.21t in cobalt stage by an electrolytic deposition method, wherein the utilization rate of the chlorine reaches 99.1%; preparing 38.7t of annual hydrogen produced in the cobalt stage by an electrolytic deposition method, wherein the hydrogen utilization rate reaches 99.6%; the annual production of ammonia gas 158.23t in the cobalt carbonate precipitation stage reaches 99.5 percent; the annual hydrogen chloride generation of the cobalt carbonate precipitation stage is 335.08t, and the hydrogen chloride utilization rate reaches 99.8%; the annual production of the carbon dioxide 267.28t in the cobalt carbonate calcination stage has the carbon dioxide utilization rate reaching 95.2%; through the arrangement of the heat exchanger 1 and the heat exchanger 2, the annual energy consumption is saved by 3.152 multiplied by 10 10 kJ; the yield of cobalt reaches 94.58%, and the purity of cobalt reaches 99.55%.
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (2)
1. The method for realizing gas recycling in the cobalt production process is characterized by comprising the following steps of:
(1) Preparing cobalt-sulfur concentrate from cobalt-containing pyrite through floatation, uniformly mixing the cobalt-sulfur concentrate with sulfuric acid solution, and roasting in a roasting furnace to generate calcine, smoke dust and gas containing sulfur dioxide, sulfur trioxide and water vapor after roasting;
(2) Discharging the calcine, adding reuse water for water leaching treatment, and filtering to obtain tailings with ferric oxide as a main component and mixed solution A containing cobalt sulfate, nickel sulfate, copper sulfate and zinc sulfate;
(3) Extracting the mixed solution A by using P204 extraction equipment to obtain mixed solution B containing cobalt sulfate and nickel sulfate and a loaded organic phase 1 containing copper ions and zinc ions;
(4) Adding sulfuric acid solution into the loaded organic phase 1 to wash cobalt to obtain a mixed solution C containing cobalt sulfate and nickel sulfate and a loaded organic phase 2 containing copper ions and zinc ions, adding sulfuric acid into the loaded organic phase 2 to carry out back extraction to obtain a mixed solution D containing copper sulfate and zinc sulfate and a lean organic phase 1, wherein the mixed solution D is used for recovering copper and zinc, and the lean organic phase 1 is continuously used for extraction by P204 extraction equipment after alkali saponification;
(5) Extracting the mixed solution B obtained in the step (3) and the mixed solution C obtained in the step (4) through P507 extraction equipment to obtain a cobalt-containing organic phase and a raffinate containing nickel sulfate, wherein the raffinate is used for recovering nickel;
(6) The cobalt-containing organic phase is added into a hydrochloric acid solution for back extraction to obtain a cobalt chloride solution and an organic phase 2, and the organic phase 2 is added with alkali for saponification and then is continuously used for extraction by P507 extraction equipment;
(7) Preparing cobalt from a 78% cobalt chloride solution by an electrolytic deposition method, and simultaneously generating chlorine and byproduct hydrogen;
(8) Adding 22% cobalt chloride solution into ammonium bicarbonate solution to prepare precipitated cobalt carbonate, generating ammonium chloride solution at the same time, filtering, and placing the cobalt carbonate into a calciner to calcine in a hydrogen atmosphere to prepare cobalt powder;
the cobalt-sulfur concentrate contains the following main elements: co:0.628%, ni:0.059%, cu:0.921%, fe:31.947%, S:33.452%, zn:0.024%, H 2 O：0.352%；
The roasting temperature in the step (1) is 610-630 ℃, and the roasting time is 2-4h;
the method comprises the steps that a heat exchanger 1 is arranged outside a roasting furnace, high-temperature smoke dust and gas generated in the roasting process are replaced by low-temperature smoke dust and gas, the low-temperature smoke dust and gas comprises smoke dust, sulfur trioxide, sulfur dioxide and water vapor, the smoke dust is collected through cyclone, cloth bags and electric dust collection, and the sulfur trioxide and the sulfur dioxide are subjected to catalytic oxidation and the water vapor to prepare sulfuric acid; the heat exchanger 1 replaces low-temperature reuse water with high-temperature reuse water for water leaching treatment in the step (2), and the water leaching treatment is carried out in a reaction kettle with a coil pipe device; the sulfuric acid prepared from the sulfur trioxide, the sulfur dioxide and the water vapor is purified and then used for washing cobalt by the loaded organic phase 1 and back extraction by the loaded organic phase 2 in the step (4) and roasting in the step (1);
the electrowinning current density of step (7) is 300-400A/m 2 The tank voltage is 2-3V;
chlorine generated in the electrolytic deposition process of the step (7) is used for leaching, oxidizing and removing impurities;
collecting the byproduct hydrogen in the step (7) and then calcining the byproduct hydrogen in the step (8) to prepare cobalt powder;
the calcination temperature of the cobalt carbonate in the hydrogen atmosphere in the step (8) is 400-600 ℃, and the calcination time is 3-5h;
and (8) arranging a replacement heater 2 outside the calciner, replacing high-temperature carbon dioxide gas generated after the calcination of the cobalt carbonate with low-temperature carbon dioxide gas through the heat exchanger 2, then reacting with ammonia water to prepare ammonium bicarbonate, replacing low-temperature ammonium chloride solution with high-temperature ammonium chloride solution through the heat exchanger 2 to promote the decomposition of ammonium chloride crystals to generate ammonia gas, hydrogen chloride and water vapor, wherein the ammonia gas is used for the alkaline saponification of the poor organic phase 1 in the step (4) and the alkaline saponification of the poor organic phase 2 in the step (6) and preparing the ammonium bicarbonate, the hydrogen chloride is dissolved in water to prepare hydrochloric acid solution for the back extraction of the cobalt-containing organic phase in the step (6), and the water vapor is used for preparing sulfuric acid, and the solvent water in the ammonium chloride solution is used as reuse water for the water leaching step.
2. The method for realizing gas recycling in the cobalt production process according to claim 1, wherein the temperature of the water leaching treatment in the step (2) is 70-90 ℃, the water leaching treatment time is 4-6h, the liquid-solid ratio of the water leaching treatment is 2-4:1, and water vapor generated in the water leaching process is used for preparing sulfuric acid.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB357366A (en) * | 1929-09-17 | 1931-09-24 | Eugen Assar Alexis Groenwall | Process for the recovery of cobalt or compounds thereof |
| US4594102A (en) * | 1983-03-29 | 1986-06-10 | Sherritt Gordon Mines Limited | Recovery of cobalt and nickel from sulphidic material |
| CN101250626A (en) * | 2008-03-18 | 2008-08-27 | 贵研铂业股份有限公司 | Method for extracting metallic nickel cobalt from irony nickel mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS50112211A (en) * | 1974-02-13 | 1975-09-03 | ||
| CN100395354C (en) * | 2006-11-27 | 2008-06-18 | 紫金矿业集团股份有限公司 | A kind of comprehensive recovery method of polymetallic sulfide ore |
| CN109234522B (en) * | 2018-09-28 | 2020-06-09 | 浙江科菲科技股份有限公司 | Comprehensive recovery processing method for cobalt-sulfur concentrate |
| CN112520790A (en) * | 2020-11-12 | 2021-03-19 | 四川顺应动力电池材料有限公司 | Method for producing cobalt sulfate by using organic cobalt slag of zinc smelting plant |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB357366A (en) * | 1929-09-17 | 1931-09-24 | Eugen Assar Alexis Groenwall | Process for the recovery of cobalt or compounds thereof |
| US4594102A (en) * | 1983-03-29 | 1986-06-10 | Sherritt Gordon Mines Limited | Recovery of cobalt and nickel from sulphidic material |
| CN101250626A (en) * | 2008-03-18 | 2008-08-27 | 贵研铂业股份有限公司 | Method for extracting metallic nickel cobalt from irony nickel mine |
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