CN109234522A - A kind of cobalt iron concentrate synthetical recovery processing method - Google Patents
A kind of cobalt iron concentrate synthetical recovery processing method Download PDFInfo
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- CN109234522A CN109234522A CN201811140326.9A CN201811140326A CN109234522A CN 109234522 A CN109234522 A CN 109234522A CN 201811140326 A CN201811140326 A CN 201811140326A CN 109234522 A CN109234522 A CN 109234522A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/10—Roasting processes in fluidised form
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/0067—Leaching or slurrying with acids or salts thereof
- C22B15/0071—Leaching or slurrying with acids or salts thereof containing sulfur
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- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
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- C22B23/043—Sulfurated acids or salts thereof
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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Abstract
The invention belongs to technical field of non-ferrous metallurgy, and in particular to a kind of cobalt iron concentrate synthetical recovery processing method.Cobalt iron concentrate is carried out fluid bed oxidation roasting by it, obtains calcining and SO2Flue gas, SO2Enter the relieving haperacidity of flue gas acid preparing system after the purified dedusting of flue gas；Ball milling obtains fine grained after calcining is cooling, fine grained carries out pulp preimpregnation, continuous pressure leaching system carries out continuous Selectively leaching, milk of lime ore pulp carries out preneutralization, obtain supernatant and filter residue, enter copper extraction system after supernatant processing to be extracted, obtains liquid and raffinate after tough cathode, electrodeposition；After filter residue is washed cleaning solution, liquid and cleaning solution carry out pulp pre-preg to calcining as pulp liquid after electrodeposition, and raffinate enters that heavy cobalt process, magnesium sinking process obtains cobalt, magnesium is expected admittedly, are sent to cinder field and store up.This method disposably can effectively recycle cobalt and copper in mine, and the rate of recovery of cobalt, copper is high, and low-grade cobalt iron concentrate can be effectively treated, realize maximally utilizing for resource.
Description
Technical field
The present invention relates to technical field of non-ferrous metallurgy, and in particular to a kind of cobalt iron concentrate synthetical recovery processing method.
Background technique
It can be divided into cobalt iron concentrate treatment process both at home and abroad at present following several: 1) pyrometallurgical smelting: by pyrogenic attack cobalt
Iron concentrate, using thermal process such as oxygen-enriched air converting, continuous converting, anode furnace refinings.Copper sulfide cobalt in cobalt iron concentrate is first turned
Copper matte regulus is turned to, then refining is blister copper, is cast into anode plate, then recycle copper cobalt using electrorefining, the process flow is simple, former
Expect adaptable, processing capacity is big, but there is a problem of that grade is low for low-grade cobalt iron concentrate, and cobalt recycles in the technique
Rate is low, and the cobalt market price is very high, therefore pyrogenic attack is lost more than gain；2) sulfating roasting: sulfating roasting has sintering temperature
It spends low, the characteristics of less energy consumption, can directly convert cobalt copper sulfide in mine to soluble cobalt copper sulfate, the latter can directly adopt
Separate valuable metal from mine with the mode of water logging, therefore the technique is substantially shorter the processing of cobalt iron concentrate synthetical recovery
Process, but sulfating roasting technique equally exists the low problem of the cobalt rate of recovery, only 75% or so, while processing capacity is low, roasting
Process control requirements are high, and then part cobalt, copper and iron form amounts of insoluble iron hydrochlorate and reduces leaching rate maturing temperature height, maturing temperature
Not exclusively, in addition iron leaching rate is high, causes except iron is at high cost, the quantity of slag is big, and cobalt copper entrainment loss is big for low then cobalt copper sulfide conversion；
3) Bioleaching: Bioleaching is a kind of emerging metallurgical technology, mainly uses Bioleaching-extraction-washing-stripping process.
Low energy consumption for Bioleaching, also has good adaptability to the mine of the low complicated component of grade, but iron leaching rate is higher, post-processing
At high cost, Bioleaching processing capacity is small, is not suitable for large-scale application.
The prior art either pyrometallurgical smelting, sulfating roasting or Bioleaching handle cobalt iron concentrate, are difficult to cobalt
Iron concentrate carries out systematic recycling and there is a problem of that the rate of recovery is low especially for the cobalt that the market price is high.
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art, a kind of cobalt iron concentrate synthetical recovery processing method is provided,
This method disposably can effectively recycle cobalt and copper in mine, and the rate of recovery of cobalt, copper is high, and low-grade cobalt sulphur essence can be effectively treated
Mine realizes maximally utilizing for resource.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that the following steps are included:
1) cobalt iron concentrate is subjected to fluid bed oxidation roasting, the metal sulfide in cobalt iron concentrate is converted into oxide, obtain calcining and
SO2Flue gas, the heat recovery that roasting process generates；SO2Enter the relieving haperacidity of flue gas acid preparing system after the purified dedusting of flue gas；Calcining is cold
But ball milling obtains fine grained after, and fine grained carries out pulp preimpregnation, obtains preimpregnation mixed liquor；
2) the resulting preimpregnation mixed liquor of step 1) is transferred to the continuous Selectively leaching of continuous pressure leaching system progress and obtains slurry, starched
Material carries out preneutralization using milk of lime ore pulp, and the reaction solution after preneutralization is separated by solid-liquid separation to obtain supernatant and filter through dense seperator
Slag, most of iron are entered in filter residue in the form of bloodstone, and cobalt copper is entered in solution by Ore Leaching, are become cobaltous sulfate copper solution and are existed
In supernatant, filter residue carries out dense countercurrent washing through water, obtains slag after cleaning solution and washing；Supernatant enters extraction work in next step
Sequence, cleaning solution is as pulp liquid return step 1) pulp pre-preg is carried out to calcining, slag is delivered to tailing neutralization chamber after washing
It is discharged after being neutralized；
3) refined filtration will be carried out after the resulting supernatant cooling of step 2, liquid enters copper extraction system and extracted after obtained refined filtration
It takes, separates copper in solution with cobalt, copper is enriched with as copper-bath, and raffinate is to be processed；
4) copper-bath in step 3) is entered into eddy flow electrodeposition system, after progress cyclone electrolytic cell obtains 1# tough cathode and electrodeposition
Liquid returns to pulp liquid and carries out pulp preimpregnation to the calcining of step 1) after liquid is mixed with the cleaning solution of step 1) after electrodeposition；
5) raffinate in step 3) is entered into heavy cobalt process, carries out heavy cobalt by precipitating reagent of magnesia slurry, cobalt is changed into hydrogen
It precipitates, separate from slurry after cobalt oxide, cobalt hydroxide is dehydrated to obtain cobalt hydroxide crude product, the slurry after separation using expansion drying
Body is Adlerika；
6) Adlerika in step 5) enters magnesium sinking process, and using milk of lime ore pulp as precipitating reagent, magnesium precipitate is generated hydrogen-oxygen
Change magnesium and calcium sulfate precipitation, slurry is separated by solid-liquid separation after precipitating, Gu material is calcium and magnesium slag, is sent to cinder field stockpiling；Filtrate is recycled simultaneously
For the wet-milling of ball mill, the pulp of lime, magnesia.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that cobalt iron concentrate maturing temperature in step 1)
It is 800-950 DEG C, calcining cooling temperature is 240-260, and preferably 250 DEG C, granularity mesh number accounts for 90% less than 150 mesh in thin material
More than.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that after step 1) fine grinding when material pulp,
Its liquid-solid ratio is 3-5:1, and is passed through saturated vapor heating in slurrying process, and control pulp outlet temperature is 70 ~ 80 DEG C.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that be passed through in Selectively leaching in step 2
Saturated vapor makes 130 ~ 150 DEG C of Selectively leaching temperature, while being passed through oxygen, and pressure is 1.3 ~ 1.5MPa.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that copper extraction system uses in step 3)
Copper extractant is lix984n, and after extraction, organic phase uses the Acidic Liquid of liquid or sulfur acid 95-100g/L after electrodeposition to be stripped,
Enter the copper in organic phase in solution, so that it is enriched with copper, copper-rich liquid cupric > 30g/L after control back extraction, and raffinate
Liquid cupric < 0.2g/L.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that eddy flow electrodeposition system is anti-in step 4)
Answer condition: current density 400 ~ 550A/ ㎡, reaction end are cupric < 8g/L in liquid after electrodeposition.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that the terminal of heavy cobalt reaction in step 5)
PH value is 8 ~ 9, contains cobalt < 0.03g/L in heavy cobalt filtrate.
A kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that when the terminal that magnesium sinking is reacted in step 5)
Reacting liquid pH value is 10-12, preferably 11.
Compared with the existing technology, the beneficial effect that the present invention obtains is:
1) present invention handles cobalt iron concentrate by using the comprehensive processing technique that pyrogenic process wet process combines, and cobalt copper is realized in pyrogenic process desulfurization
Structural form conversion, wet process using continuous pressure leach, with high temperature and pressure make cobalt copper leach completely, subsequent technique segmentation recycles
Copper, cobalt, and leached mud, calcium and magnesium slag are dealt carefully with, the sharpest edges of technique are to have ensured the high-recovery of cobalt and copper, including place
Low-grade cobalt iron concentrate is managed, to realize maximally utilizing for resource, effectively solves the prior art existing cobalt rate of recovery mostly
The not cost-effective problem of low, low-grade cobalt iron concentrate processing cost；
2) present invention has combined the rationalization processing of exhaust gas, waste residue and waste water and has recycled, the sulfur dioxide that pyrogenic process generates
Flue gas carries out relieving haperacidity, gained sulfuric acid be entirely produce used in, output waste residue has carried out harmless treatment, and output waste water can be into
Row circulating and recovering, therefore whole set process is environmentally protective, it is energy-saving；
3) cyclone electrolytic cell technical treatment cupric leachate is used in system of the present invention, utilizes the selective electrodeposition of eddy flow electrodeposition technology
And depth decopper(ing) advantage, it realizes the extraction electrode copper from cupric leachate and settles at one go, while the technology is to initial feed liquid
Middle copper concentration is of less demanding, and can be carried out depth decopper(ing), and copper direct yield is high；
4) the raffinate liquid phase in the present invention carries out heavy cobalt reaction by precipitating reagent of the mild magnesia of alkalinity, can ensure heavy cobalt
While, the precipitating of other metal impurities is avoided, to improve the content of cobalt in heavy cobalt slag, rational technology, magnesia is inexpensive easily
, processing cost is cheap.
Detailed description of the invention
Fig. 1 is the process flow chart schematic diagram of the embodiment of the present invention.
Specific embodiment
Illustrate technical solution of the present invention below by way of specific embodiment, but the scope of the present invention is not limited thereto:
As shown, a kind of cobalt iron concentrate synthetical recovery processing method of the invention, comprising the following steps:
1) cobalt iron concentrate is subjected to fluid bed oxidation roasting, cobalt iron concentrate maturing temperature is 800-950 DEG C, the metal in cobalt iron concentrate
Sulfide is converted into oxide, obtains calcining and SO2Flue gas, the heat recovery that roasting process generates；SO2After the purified dedusting of flue gas
Into flue gas acid preparing system relieving haperacidity；Ball milling obtains fine grained after calcining is cooling, and fine grained carries out pulp preimpregnation, obtains preimpregnation mixing
Liquid, the calcining cooling temperature are 240-260, and preferably 250 DEG C, granularity mesh number accounts for 90% or more less than 150 mesh in thin material；
2) the resulting preimpregnation mixed liquor of step 1) is transferred to the continuous Selectively leaching of continuous pressure leaching system progress and obtains slurry, selected
Selecting property is passed through saturated vapor in leaching, and makes 130 ~ 150 DEG C of Selectively leaching temperature, while being passed through oxygen, pressure for 1.3 ~
1.5MPa；Slurry carries out preneutralization using milk of lime ore pulp, and the reaction solution after preneutralization is separated by solid-liquid separation through dense seperator
Clear liquid and filter residue, most of iron are entered in filter residue in the form of bloodstone, and cobalt copper is entered in solution by Ore Leaching, become cobaltous sulfate
For copper solution in supernatant, filter residue carries out dense countercurrent washing through water, obtains slag after cleaning solution and washing；Supernatant enters in next step
Extraction process, cleaning solution return to pulp liquid and carry out pulp preimpregnation to the calcining of step 1), and slag is delivered to tailing neutralization chamber after washing
It is discharged after being neutralized；
3) refined filtration will be carried out after the resulting supernatant cooling of step 2, liquid enters copper extraction system and extracted after obtained refined filtration
It takes, separates copper in solution with cobalt, copper is enriched with as copper-bath, and raffinate is to be processed, what the copper extraction system used
Copper extractant is lix984n, and after extraction, organic phase uses the Acidic Liquid of liquid or sulfur acid 95-100g/L after electrodeposition to be stripped,
Enter the copper in organic phase in solution, so that it is enriched with copper, copper-rich liquid cupric > 30g/L after control back extraction, and raffinate
Liquid cupric < 0.2g/L；
4) copper-bath in step 3) is entered into eddy flow electrodeposition system, after progress cyclone electrolytic cell obtains 1# tough cathode and electrodeposition
Liquid returns to pulp liquid and carries out pulp preimpregnation, eddy flow electricity to the calcining of step 1) after liquid is mixed with the cleaning solution of step 1) after electrodeposition
Current density 400 ~ 550A/ ㎡ of solution, reaction end are cupric < 8g/L in liquid after electrodeposition；
5) raffinate in step 3) is entered into heavy cobalt process, carries out heavy cobalt by precipitating reagent of magnesia slurry, cobalt is changed into hydrogen
It precipitates, separate from slurry after cobalt oxide, cobalt hydroxide is dehydrated to obtain cobalt hydroxide crude product, the slurry after separation using expansion drying
Body is Adlerika；The pH value of the terminal of heavy cobalt reaction is 8 ~ 9, contains cobalt < 0.03g/L in heavy cobalt filtrate；
6) Adlerika in step 5) enters magnesium sinking process, and using milk of lime ore pulp as precipitating reagent, magnesium precipitate is generated hydrogen-oxygen
Change magnesium and calcium sulfate precipitation, slurry is separated by solid-liquid separation after precipitating, Gu material is calcium and magnesium slag, is sent to cinder field stockpiling；Filtrate is recycled simultaneously
For the wet-milling of ball mill, the pulp of lime, magnesia, reacting liquid pH value is 10-12 when the terminal of magnesium sinking reaction, preferably
11。
Embodiment 1: a kind of cobalt iron concentrate synthetical recovery processing method of the present invention, process flow as shown in Figure 1, include with
Lower step:
1) cobalt iron concentrate using diesel oil as fuel, and blasts oxygenized air combustion supporting in fluidized bed roasting kiln roasting, roasts in-furnace temperature
Control obtains calcining and SO at 800-950 DEG C2Flue gas, SO2Fume afterheat is used for boiler for producing steam, then purified again to make afterwards
Acid, the calcining after roasting are cooled to 250 DEG C, levigate using wet ball mill, it is levigate after 94% or more thin material granularity mesh number
Less than 150 mesh, the thin material of gained with mass ratio 4:1 mixing pulp and is stirred with 200g/L dilution heat of sulfuric acid, and is passed through full
It is leached in advance with steam, until reacting liquid temperature is warming up to 80 DEG C of reactions and terminates, obtains preimpregnation mixed liquor；
2) preimpregnation mixed liquor obtained by step 1) is moved into autoclave, is passed through saturated vapor and oxygen, at 140 DEG C of temperature, kettle
Selectively leaching reaction is carried out under conditions of interior pressure 1.3MPa, presoaking mixed liquor residence time in autoclave is 5h or so,
The slurry of output is added milk of lime and carries out preneutralization, adjusts material liquid pH to 3.0, be separated by solid-liquid separation using dense seperator
To supernatant and filter residue, most of iron is entered in filter residue in the form of bloodstone, and cobalt copper is entered in solution by Ore Leaching, becomes sulphur
Sour cobalt copper solution controls solid masses content>25% in filter residue, supernatant solid masses content<5%, using clear in supernatant
Water carries out dense countercurrent washing to gained filter residue, obtains slag after cleaning solution and washing；Supernatant enters next step extraction process, washing
Liquid is as pulp liquid return step 1) pulp pre-preg is carried out to calcining, slag is delivered to tailing neutralization chamber and is neutralized after washing
It is discharged after processing；
3) refined filtration will be carried out after step (2) gained supernatant cooling, liquid enters copper extraction system progress copper extraction after obtained refined filtration
Take, separate copper in solution with cobalt, stratification, obtain raffinate liquid phase and copper extraction load it is organic, copper be enriched with for copper sulphate it is molten
Liquid, raffinate cupric < 0.2g/L；The extraction load of gained copper is organic by the washing of 10g/L or so dilute sulfuric acid, 100g/L or so sulfuric acid
Liquid is stripped after liquid or electrodeposition, obtains copper sulphate strip liquor, controls strip liquor cupric > 30g/L；
4) strip liquor obtained by step 3) is entered in eddy flow electrodeposition system, realizes selective electrodeposition, while electrodeposition mistake can be eliminated
Concentration polarization in journey, improves the direct yield of copper, and when electrodeposition controls 400 ~ 550A/ of current density ㎡, carries out electrodeposition reaction, obtains 1#
Liquid after tough cathode and electrodeposition, after the electrodeposition in liquid when copper content < 8g/L, liquid is back in step (1) as slurry after recycling electrodeposition
Change liquid and pulp preimpregnation is carried out to calcining；
5) MgO will be added in raffinate liquid phase obtained by step 3), carries out heavy cobalt reaction, when the pH value of reaction solution is 8.5, cobalt transformation
It to be precipitated from slurry after cobalt hydroxide, after reaction, is separated by solid-liquid separation, obtains heavy cobalt filtrate and solid material, control in heavy cobalt filtrate
Amount containing cobalt < 0.03g/L, gained expects that expansion drying to get finished product cobalt hydroxide crude product, directly outer can be sold admittedly, heavy after separation
Cobalt filtrate is Adlerika；
6) milk of lime is added into heavy cobalt filtrate obtained by step 5), using milk of lime as precipitating reagent, carries out magnesium sinking reaction, work as reaction solution
When pH value is 11, magnesium sinking reaction terminates, and reaction solution is separated by solid-liquid separation, and gained expects to be magnesium hydroxide and calcium sulfate product admittedly, is sent to
Cinder field stockpiling；Filtrate recycles and is used for the pulp of the wet-milling of ball mill, lime, magnesia.
Certain production project example, cobalt iron concentrate raw material day output 800t/d, using the method for embodiment 1 at it
Reason, the cobalt iron concentrate material composition are as shown in table 1 below:
1 cobalt iron concentrate material chemical component (%) of table
It is handled by process above, year produces 9400t/a standard cathode copper, and product quality meets GB standard (GB/T467-
1997), quality standard is as shown in table 2；Produce 30% crude cobalt hydroxide 15600t/a, main chemical compositions such as 3 institute of table per year
Show, 4690t/a containing cobalt, copper, cobalt total recovery be respectively 89.37%, 88.85%.Compare conventional process, copper, cobalt total recovery
Higher, recovering effect is more preferable.
2 99.95 standard cathode copper quality standard (%) of table
Year produces crude cobalt hydroxide 15600t/a, contains cobalt >=30%, cobalt tenor 4690t/a, crude cobalt hydroxide product matter
Amount meets YS/T 1152-2016 professional standard, and it is as shown in the table for main chemical compositions.
The crude cobalt hydroxide main chemical compositions (%) of table 3
Remarks: the oxide of cobalt cannot be greater than 1% in crude cobalt hydroxide, and Grade A, goods of inferior quality crude cobalt hydroxide is aqueous is not more than
30%。
It is only enumerating to the way of realization of inventive concept, protection model of the invention that this specification, which implements the content,
Enclosing should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in those skilled in the art
Member according to the present invention design it is conceivable that equivalent technologies mean.
Claims (8)
1. a kind of cobalt iron concentrate synthetical recovery processing method, it is characterised in that the following steps are included:
1) cobalt iron concentrate is subjected to fluid bed oxidation roasting, the metal sulfide in cobalt iron concentrate is converted into oxide, obtain calcining and
SO2Flue gas, the heat recovery that roasting process generates；SO2Enter the relieving haperacidity of flue gas acid preparing system after the purified dedusting of flue gas；Calcining is cold
But ball milling obtains fine grained after, and fine grained carries out pulp preimpregnation, obtains preimpregnation mixed liquor；
2) the resulting preimpregnation mixed liquor of step 1) is transferred to the continuous Selectively leaching of continuous pressure leaching system progress and obtains slurry, starched
Material carries out preneutralization using milk of lime ore pulp, and the reaction solution after preneutralization is separated by solid-liquid separation to obtain supernatant and filter through dense seperator
Slag, most of iron are entered in filter residue in the form of bloodstone, and cobalt copper is entered in solution by Ore Leaching, are become cobaltous sulfate copper solution and are existed
In supernatant, filter residue carries out dense countercurrent washing through water, obtains slag after cleaning solution and washing；Supernatant enters extraction work in next step
Sequence, cleaning solution is as pulp liquid return step 1) pulp pre-preg is carried out to calcining, slag is delivered to tailing neutralization chamber after washing
It is discharged after being neutralized；
3) refined filtration will be carried out after the resulting supernatant cooling of step 2, liquid enters copper extraction system and extracted after obtained refined filtration
It takes, separates copper in solution with cobalt, copper is enriched with as copper-bath, and raffinate is to be processed；
4) copper-bath in step 3) is entered into eddy flow electrodeposition system, after progress cyclone electrolytic cell obtains 1# tough cathode and electrodeposition
Liquid returns to pulp liquid and carries out pulp preimpregnation to the calcining of step 1) after liquid is mixed with the cleaning solution of step 1) after electrodeposition；
5) raffinate in step 3) is entered into heavy cobalt process, carries out heavy cobalt by precipitating reagent of magnesia slurry, cobalt is changed into hydrogen
It precipitates, separate from slurry after cobalt oxide, cobalt hydroxide is dehydrated to obtain cobalt hydroxide crude product, the slurry after separation using expansion drying
Body is Adlerika；
6) Adlerika in step 5) enters magnesium sinking process, and using milk of lime ore pulp as precipitating reagent, magnesium precipitate is generated hydrogen-oxygen
Change magnesium and calcium sulfate precipitation, slurry is separated by solid-liquid separation after precipitating, Gu material is calcium and magnesium slag, is sent to cinder field stockpiling；Filtrate is recycled simultaneously
For the wet-milling of ball mill, the pulp of lime, magnesia.
2. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that cobalt sulphur in step 1)
Concentrate maturing temperature is 800-950 DEG C, and calcining cooling temperature is 240-260, and preferably 250 DEG C, granularity mesh number is small in thin material
90% or more is accounted in 150 mesh.
3. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that after step 1) fine grinding
When material pulp, liquid-solid ratio 3-5:1, and slurrying process be passed through saturated vapor heating, control pulp outlet temperature be 70 ~
80℃。
4. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that selected in step 2
Property leach in be passed through saturated vapor, make 130 ~ 150 DEG C of Selectively leaching temperature, while being passed through oxygen, pressure for 1.3 ~
1.5MPa。
5. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that copper extracts in step 3)
The copper extractant for taking system to use is lix984n, and after extraction, organic phase uses the acid of liquid or sulfur acid 95-100g/L after electrodeposition
Property liquid be stripped, enter the copper in organic phase in solution, so that copper be made to be enriched with, copper-rich liquid cupric after control back extraction
>30g/L, and raffinate cupric<0.2g/L.
6. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that eddy flow in step 4)
The reaction condition of electrodeposition system: current density 400 ~ 550A/ ㎡, reaction end are cupric < 8g/L in liquid after electrodeposition.
7. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that heavy cobalt in step 5)
The pH value of the terminal of reaction is 8 ~ 9, contains cobalt < 0.03g/L in heavy cobalt filtrate.
8. a kind of cobalt iron concentrate synthetical recovery processing method according to claim 1, it is characterised in that magnesium sinking in step 6)
When the terminal of reaction reacting liquid pH value be 10-12, preferably 11.
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