CN108165775A - A kind of method of recovery indium in caustic fusion slag from jamesonite - Google Patents
A kind of method of recovery indium in caustic fusion slag from jamesonite Download PDFInfo
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- CN108165775A CN108165775A CN201711393830.5A CN201711393830A CN108165775A CN 108165775 A CN108165775 A CN 108165775A CN 201711393830 A CN201711393830 A CN 201711393830A CN 108165775 A CN108165775 A CN 108165775A
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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
- C22B58/00—Obtaining gallium or indium
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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
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- C—CHEMISTRY; METALLURGY
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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Abstract
The method that the present invention discloses recovery indium in a kind of caustic fusion slag from jamesonite, reducing agent and filling carrier are added in jamesonite caustic fusion solid impurity particle, heated in input heating furnace after granulation, drying, the flue gas to volatilize in heating process is imported into double-deck crystallizer, crystal is collected using bagroom after cooling, obtains composite oxygen powder；Composite oxygen powder is leached using acid solution, precipitating reagent is added in leachate and carries out heavy indium processing, press filtration obtains indium slag, and indium slag is sent to indium factory carries out purification processes；The method of recovery indium is conducive to improve the comprehensive utilization of jamesonite basic clinker in the slave jamesonite basic clinker of the present invention, reduces smelting slag and stacks the pollution of management cost and the heavy metal wherein contained to environment；Secondly, valuable element can be made to be enriched in metal oxygen powder, realizes that the metal in oxygen powder is detached with wet-treating, metal recovery rate is high, and treating capacity is big, and low energy consumption, good in economic efficiency, there is vast potential for future development.
Description
Technical field
The present invention relates to metal smelt technical fields, more particularly relate to one kind and are returned from jamesonite caustic fusion slag
The method for receiving indium.
Background technology
Jamesonite is a kind of mixed type for being associated with the various metals such as zinc, silver, indium, copper vulcanization based on lead, antimony
Ore deposit is contained most abundant in the big factories and miness area in China Guangxi Hechi.Since the 1990s, the exploitation profit of fragile S-Pb-Sb ore resources
With having had considerable scale, until there are the jamesonite smeltery of scale in the period of great prosperity in 1999, only Guangxi province up to 10
More than, ability of smelting reaches 300,000 tons of year processing jamesonite concentrate or more.
The main smelting process of China's jamesonite concentrate is sintering-blast furnace smelting process, and there are product structure lists
First, cost is higher or the bad independent processing of the lead skim of Leaching of Antimony, it is limited to associated metal recycling the shortcomings of, slurry electrolysis is current
Then without industrialized production.Usual fragile S-Pb-Sb smelting slag purchases processing or purposes of paving the way by slag factory, causes wherein valuable
Rich in phosphide element in the waste of metals resources, especially fragile S-Pb-Sb caustic fusion slag, reach 200-800g/t.
Indium has excellent physics, chemistry, mechanics, electronics, photoelectricity and performance of technical process, thus is widely used in army
The fields such as thing, space flight, electronics industry and medical and health.The recovery method of indium mainly has oxidation slag practice at present, is electrolysed concentration method,
Ion-exchange, sulfating roasting method, hot acid leach ferrovanadium method, and hot acid leaches goethite process etc..At present in the recovery technology of indium
Have been achieved for very big progress, but also there are it is certain the problem of, such as recovery indium, the separation of indium iron in high-iron zinc sulfide concentrate smelting
Production cost it is high, the rate of recovery is low；The ferrovanadium slag for the indium in high-iron zinc sulfide concentrate obtain in removal process using ferrovanadium method
The quantity of slag is big, and energy expenditure is high, pollutes the environment.
Invention content
It is an object of the invention to overcome defect of the existing technology, provide a kind of from jamesonite caustic fusion slag
The method of middle recovery indium, the method is easy to operate, and production cost is low, can effectively recycle the phosphide element in jamesonite.
To achieve these goals, the technical solution adopted by the present invention is as follows：
The method of recovery indium, includes the following steps in the slave jamesonite caustic fusion slag of the present invention：
(1) jamesonite caustic fusion slag is ground up, sieved, adds in reducing agent and filling carrier, pelletized, is dry to it
Water content is 10-20%, obtains pre-add thermal material；
(2) the pre-add thermal material of the step (1) is put into heating furnace and heated, control the temperature of heating furnace
It is 1000-1500 DEG C, heating time 1.5-10h；
(3) flue gas that the pre-add thermal material of the step (2) volatilizees in heating process is imported into double-deck crystallizer, cooling
Crystal is collected using bagroom afterwards, obtains composite oxygen powder；
(4) the composite oxygen powder of the step (3) is leached using acid solution, filters, take filtrate, obtain rich indium leaching
Go out liquid；
(5) precipitating reagent is added in the rich indium leachate of the step (4) and carries out heavy indium processing, press filtration takes filter residue, obtains
Indium slag is sent to indium factory and carries out purification processes by indium slag.
Preferably, when the jamesonite caustic fusion slag of the step (1) is ground up, sieved, with ball mill by crisp sulphur
Lead antimony ore caustic fusion slag grinds 2-10h, selects particle and reducing agent and filling carrier system of the grain size for 100-300 μm
Grain.
Preferably, the reducing agent of the step (1) is coke powder or coal dust.
Preferably, the filling carrier of the step (1) is calcium carbonate and/or magnesium carbonate powder；The filling carrier
Grain size is 1-3mm.
Preferably, the mass ratio of the jamesonite caustic fusion slag of the step (1), reducing agent and filling carrier is
80-120：30-70：15-30.
Preferably, the acid solution of the step (4) is sulfuric acid, and the sulfuric acid concentration is 90-98%.
Preferably, when being leached in the step (4) using acid solution to composite oxygen powder, using counterflow leaching mode
Composite oxygen powder is leached, it is 1 to control the solid-to-liquid ratio of composite oxygen powder and acid solution：3-20, extraction temperature are 75-98 DEG C,
Extraction time is 120-180min.
Preferably, it is 3-8 that the step (5), which adds in precipitating reagent and the molal weight ratio of indium in rich indium leachate,：10.
Preferably, when addition precipitating reagent carries out heavy indium processing in the rich indium leachate of the step (5), rich indium leaching is heated
Liquid simultaneously makes it maintain 35-50 DEG C, then adds in precipitating reagent in the rich indium leachate of stirring, rich indium is adjusted after addition and is leached
The pH value of liquid is 2.4-2.9, and the reaction system is made to react 1-5h under agitation.
Preferably, the precipitating reagent of the step (5) is sodium tripolyphosphate.
The present invention is by adopting the above-described technical solution, have the advantages that：
1st, in the basic clinker provided by the invention from jamesonite recovery indium method, preferably solve fragile S-Pb-Sb
The comprehensive reutilization problem of ore deposit caustic fusion slag；Jamesonite caustic fusion slag is ground and is sieved, is selected micron-sized
Smelting slag particles benefit can promote the gold in melting solid impurity particle in reduction drying and the reaction time in heating furnace, high-temperature roasting
Belong to sulfide and be converted into metal oxide, make the concentration of the sulfur dioxide in flue gas of output that can meet the needs of production sulfuric acid, and
The elements such as the lead in melting solid impurity particle, cadmium, arsenic, antimony, indium is made to fling to removing as much as possible, are conducive to improve jamesonite alkalinity
The comprehensive utilization of slag improves productivity effect, and reduces the management cost and smelting slag of the stacking of jamesonite basic clinker
Pollution of the middle heavy metal to environment.
2nd, the present invention uses pyrogenic attack jamesonite caustic fusion slag, and valuable element is made to be enriched in metal oxygen powder,
Oxygen powder is directly realized by the metal separation in oxygen powder by wet-treating, and metal recovery rate is high, and treating capacity is big, and mechanization degree is high,
Low energy consumption, good in economic efficiency.
3rd, the present invention carries out Selectively leaching using the concentrated sulfuric acid to zinc, indium, lead, antimony, and zinc, indium is made to enter in solution and lead antimony
It is enriched in waste residue, so as to achieve the effect that separating indium, antimony；And it in the indium in using sulfuric acid leaching composite oxygen powder, uses
Disposable counterflow leaching, leaching rate reach more than 95%, and technological process is short, easy to operate, and leaching rate is high, save raw material and the energy
Consumption avoids complex process, reaction condition not easy to control, the complicated for operation, energy consumption of traditional two-period form counterflow leaching technique
, leaching rate low, production efficiency low, environmental pollution serious the problems such as high with material consumption, the present invention is with good economic efficiency
And social benefit, there is vast potential for future development.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, preferred embodiment is enumerated below, to this hair
Bright further description.However, it is necessary to illustrate, many details listed in specification are used for the purpose of making reader to this
There are one thorough explanations for the one or more aspects of invention, can also realize the present invention's even without these specific details
These aspects.
Embodiment 1
Jamesonite caustic fusion slag is ground into 2h with ball mill, selects grain size spare for 100 μm of particle；By coke
Powder, the calcium carbonate powder that grain size is 1mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 16：6：3 mass ratio
It is uniformly mixed, it is 10% that water content is dried to after granulation, then puts into heating furnace and is heated, controls the temperature of heating furnace
It is 1000 DEG C to spend, heating time 10h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, cloth bag is used after cooling
Dust-precipitator collects crystal, obtains composite oxygen powder；With a concentration of 90% sulfuric acid using counterflow leaching mode to composite oxygen powder into
Row leaches, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：3, extraction temperature is 98 DEG C, extraction time 180min, leaches knot
It is filtered after beam, takes filtrate, obtain rich indium leachate, heat rich indium leachate and it is made to maintain 35 DEG C, then the rich indium of side stirring
Leachate side adds in sodium tripolyphosphate, and the pH value that rich indium leachate is adjusted after addition is 2.4, makes rich indium leachate and trimerization
The reaction system of sodium phosphate reacts 1h under agitation, carries out press filtration after reaction, takes filter residue, obtains indium slag, by indium slag
It is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and the molal weight of indium in rich indium leachate
Than being 3：10.
Embodiment 2
Jamesonite caustic fusion slag is ground into 3h with ball mill, selects grain size spare for 150 μm of particle；By coal
Powder, the magnesium carbonate powder that grain size is 1.5mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 12：7：3 mass ratio
It is uniformly mixed, it is 12% that water content is dried to after granulation, then puts into heating furnace and is heated, controls the temperature of heating furnace
It is 1080 DEG C to spend, heating time 9h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, is received after cooling using cloth bag
Dirt device collects crystal, obtains composite oxygen powder；Composite oxygen powder is carried out using counterflow leaching mode with a concentration of 91% sulfuric acid
It leaches, it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：6, extraction temperature is 95 DEG C, and extraction time 170min, leaching terminates
After filter, take filtrate, obtain rich indium leachate, heating rich indium leachate simultaneously makes it maintain 38 DEG C, then the rich indium leaching of side stirring
Go out liquid side and add in sodium tripolyphosphate, the pH value that rich indium leachate is adjusted after addition is 2.5, makes rich indium leachate and trimerization phosphorus
The reaction system of sour sodium reacts 1.8h under agitation, carries out press filtration after reaction, takes filter residue, obtains indium slag, by indium slag
It is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and the molal weight of indium in rich indium leachate
Than being 2：5.
Embodiment 3
Jamesonite caustic fusion slag is ground into 4h with ball mill, selects grain size spare for 200 μm of particle；By coal
Powder, the calcium carbonate powder that grain size is 1.8mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 84：38：19 quality
Than being uniformly mixed, it is 14% that water content is dried to after granulation, then puts into heating furnace and is heated, controls heating furnace
Temperature is 1160 DEG C, heating time 8h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, cloth bag is used after cooling
Dust-precipitator collects crystal, obtains composite oxygen powder；With a concentration of 92% sulfuric acid using counterflow leaching mode to composite oxygen powder into
Row leaches, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：9, extraction temperature is 92 DEG C, extraction time 162min, leaches knot
It is filtered after beam, takes filtrate, obtain rich indium leachate, heat rich indium leachate and it is made to maintain 41 DEG C, then the rich indium of side stirring
Leachate side adds in sodium tripolyphosphate, and the pH value that rich indium leachate is adjusted after addition is 2.7, makes rich indium leachate and trimerization
The reaction system of sodium phosphate reacts 2.6h under agitation, carries out press filtration after reaction, takes filter residue, obtains indium slag, by indium
Slag is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and mole matter of indium in rich indium leachate
Amount is than being 1：2.
Embodiment 4
Jamesonite caustic fusion slag is ground into 5h with ball mill, selects grain size spare for 230 μm of particle；By coal
Powder, the magnesium carbonate powder that grain size is 2.1mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 107：48：23 quality
Than being uniformly mixed, it is 16% that water content is dried to after granulation, then puts into heating furnace and is heated, controls heating furnace
Temperature is 1240 DEG C, heating time 7h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, cloth bag is used after cooling
Dust-precipitator collects crystal, obtains composite oxygen powder；With a concentration of 93% sulfuric acid using counterflow leaching mode to composite oxygen powder into
Row leaches, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：12, extraction temperature is 88 DEG C, extraction time 155min, is leached
After filter, take filtrate, obtain rich indium leachate, heating rich indium leachate simultaneously makes it maintain 45 DEG C, and then side stirring is rich
Indium leachate side adds in sodium tripolyphosphate, and the pH value that rich indium leachate is adjusted after addition is 2.8, makes rich indium leachate and three
The reaction system of polyphosphate sodium reacts 3.2h under agitation, carries out press filtration after reaction, takes filter residue, obtains indium slag, will
Indium slag is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and mole of indium in rich indium leachate
Mass ratio is 2：3.
Embodiment 5
Jamesonite caustic fusion slag is ground into 7h with ball mill, selects grain size spare for 250 μm of particle；By coal
Powder, the mixed-powder of the magnesium carbonate that grain size is 2.4mm and magnesium carbonate and above-mentioned jamesonite caustic fusion solid impurity particle are pressed
According to 111：52：25 mass ratio is uniformly mixed, and it is 18% that water content is dried to after granulation, is then put into heating furnace and is heated
Processing, the temperature for controlling heating furnace are 1300 DEG C, heating time 5h；The flue gas to volatilize in heating process is imported into double-deck crystallization
Device collects crystal using bagroom after cooling, obtains composite oxygen powder；Counterflow leaching is used with a concentration of 95% sulfuric acid
Mode leaches composite oxygen powder, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：14, extraction temperature is 83 DEG C, during leaching
Between for 145min, filtered after leaching, take filtrate, obtain rich indium leachate, heating rich indium leachate simultaneously makes it maintain 48
DEG C, sodium tripolyphosphate then is added in the rich indium leachate of stirring, the pH value that rich indium leachate is adjusted after addition is 2.9,
The reaction system of rich indium leachate and sodium tripolyphosphate is made to react 3.7h under agitation, press filtration is carried out after reaction, takes
Filter residue obtains indium slag, and indium slag is sent to indium factory carries out purification processes, the mole that control sodium tripolyphosphate adds in and rich indium
The molal weight ratio of indium is 7 in leachate：10.
Embodiment 6
Jamesonite caustic fusion slag is ground into 8h with ball mill, selects grain size spare for 270 μm of particle；By coal
Powder, the mixed-powder of the magnesium carbonate that grain size is 2.6mm and magnesium carbonate and above-mentioned jamesonite caustic fusion solid impurity particle are pressed
According to 120：65：28 mass ratio is uniformly mixed, and it is 20% that water content is dried to after granulation, is then put into heating furnace and is heated
Processing, the temperature for controlling heating furnace are 1380 DEG C, heating time 3.8h；The flue gas to volatilize in heating process is imported into double-deck knot
Brilliant device collects crystal using bagroom after cooling, obtains composite oxygen powder；It is soaked with a concentration of 96% sulfuric acid using adverse current
Go out mode to leach composite oxygen powder, it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：16, extraction temperature is 80 DEG C, is leached
Time is 133min, is filtered after leaching, takes filtrate, obtains rich indium leachate, heats rich indium leachate and maintains it
50 DEG C, sodium tripolyphosphate then is added in the rich indium leachate of stirring, the pH value that rich indium leachate is adjusted after addition is
2.8, the reaction system of rich indium leachate and sodium tripolyphosphate is made to react 4.2h under agitation, is pressed after reaction
Filter, takes filter residue, obtains indium slag, and indium slag is sent to indium factory carries out purification processes, the mole that control sodium tripolyphosphate adds in
Molal weight ratio with indium in rich indium leachate is 4：5.
Embodiment 7
Jamesonite caustic fusion slag is ground into 9h with ball mill, selects grain size spare for 290 μm of particle；By coal
Powder, the magnesium carbonate powder that grain size is 2.8mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 96：70：29 matter
For amount than being uniformly mixed, it is 19% that water content is dried to after granulation, then puts into heating furnace and is heated, controls heating furnace
Temperature for 1420 DEG C, heating time 2.5h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, is used after cooling
Bagroom collects crystal, obtains composite oxygen powder；With a concentration of 97% sulfuric acid using counterflow leaching mode to composite oxygen
Powder is leached, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：18, extraction temperature is 78 DEG C, extraction time 125min,
It is filtered after leaching, takes filtrate, obtain rich indium leachate, heat rich indium leachate and it is made to maintain 52 DEG C, then side is stirred
It mixes rich indium leachate side and adds in sodium tripolyphosphate, the pH value that rich indium leachate is adjusted after addition is 2.7, makes rich indium leachate
4.5h is reacted under agitation with the reaction system of sodium tripolyphosphate, is carried out press filtration after reaction, is taken filter residue, obtains indium
Indium slag is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and indium in rich indium leachate by slag
Molal weight ratio be 3.8：10.
Embodiment 8
Jamesonite caustic fusion slag is ground into 10h with ball mill, selects grain size spare for 300 μm of particle；By coal
Powder, the calcium carbonate powder that grain size is 3mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 99：35：30 quality
Than being uniformly mixed, it is 15% that water content is dried to after granulation, then puts into heating furnace and is heated, controls heating furnace
Temperature is 1460 DEG C, heating time 2h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, cloth bag is used after cooling
Dust-precipitator collects crystal, obtains composite oxygen powder；With a concentration of 98% sulfuric acid using counterflow leaching mode to composite oxygen powder into
Row leaches, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：20, extraction temperature is 76 DEG C, extraction time 120min, is leached
After filter, take filtrate, obtain rich indium leachate, heating rich indium leachate simultaneously makes it maintain 54 DEG C, and then side stirring is rich
Indium leachate side adds in sodium tripolyphosphate, and the pH value that rich indium leachate is adjusted after addition is 2.6, makes rich indium leachate and three
The reaction system of polyphosphate sodium reacts 4.8h under agitation, carries out press filtration after reaction, takes filter residue, obtains indium slag, will
Indium slag is sent to indium factory and carries out purification processes, the mole that control sodium tripolyphosphate adds in and mole of indium in rich indium leachate
Mass ratio is 4.7：10.
Embodiment 9
Jamesonite caustic fusion slag is ground into 8.4h with ball mill, selects grain size spare for 275 μm of particle；By coal
Powder, the magnesium carbonate powder that grain size is 2.7mm and above-mentioned jamesonite caustic fusion solid impurity particle are according to 120：70：27 matter
For amount than being uniformly mixed, it is 12% that water content is dried to after granulation, then puts into heating furnace and is heated, controls heating furnace
Temperature for 1500 DEG C, heating time 1.5h；The flue gas to volatilize in heating process is imported into double-deck crystallizer, is used after cooling
Bagroom collects crystal, obtains composite oxygen powder；With a concentration of 98% sulfuric acid using counterflow leaching mode to composite oxygen
Powder is leached, and it is 1 to control the solid-to-liquid ratio of composite oxygen powder and sulfuric acid：17, extraction temperature is 75 DEG C, extraction time 120min,
It is filtered after leaching, takes filtrate, obtain rich indium leachate, heat rich indium leachate and it is made to maintain 55 DEG C, then side is stirred
It mixes rich indium leachate side and adds in sodium tripolyphosphate, the pH value that rich indium leachate is adjusted after addition is 2.5, makes rich indium leachate
5h is reacted under agitation with the reaction system of sodium tripolyphosphate, press filtration is carried out after reaction, takes filter residue, obtains indium slag,
It indium slag is sent to indium factory carries out purification processes, the mole that control sodium tripolyphosphate adds in is rubbed with indium in richness indium leachate
Your mass ratio is 7：10.
Claims (10)
1. a kind of method of recovery indium in caustic fusion slag from jamesonite, which is characterized in that include the following steps：
(1) jamesonite caustic fusion slag is ground up, sieved, adds in reducing agent and filling carrier, granulation, drying are aqueous to its
It measures as 10-20%, obtains pre-add thermal material；
(2) the pre-add thermal material of the step (1) is put into heating furnace and heated, the temperature for controlling heating furnace is
1000-1500 DEG C, heating time 1.5-10h；
(3) flue gas that the pre-add thermal material of the step (2) volatilizees in heating process is imported into double-deck crystallizer, made after cooling
Crystal is collected with bagroom, obtains composite oxygen powder；
(4) the composite oxygen powder of the step (3) is leached using acid solution, filters, take filtrate, obtained rich indium and leach
Liquid；
(5) precipitating reagent is added in the rich indium leachate of the step (4) and carries out heavy indium processing, press filtration takes filter residue, obtains indium
Indium slag is sent to indium factory and carries out purification processes by slag.
2. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：By institute
When stating the jamesonite caustic fusion slag of step (1) and being ground up, sieved, jamesonite caustic fusion slag is ground with ball mill
2-10h selects grain size to pelletize for 100-300 μm of particle with reducing agent and filling carrier.
3. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
The reducing agent of step (1) is coke powder or coal dust.
4. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
The filling carrier of step (1) is calcium carbonate and/or magnesium carbonate powder；The grain size of the filling carrier is 1-3mm.
5. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
The mass ratio of the jamesonite caustic fusion slag of step (1), reducing agent and filling carrier is 80-120：30-70：15-30.
6. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
The acid solution of step (4) is sulfuric acid, and the sulfuric acid concentration is 90-98%.
7. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
When being leached in step (4) using acid solution to composite oxygen powder, composite oxygen powder is leached using counterflow leaching mode,
It is 1 to control the solid-to-liquid ratio of composite oxygen powder and acid solution：3-20, extraction temperature are 75-98 DEG C, extraction time 120-
180min。
8. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：It is described
It is 3-8 that step (5), which adds in precipitating reagent and the molal weight ratio of indium in rich indium leachate,：10.
9. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：Institute
It states when precipitating reagent is added in the rich indium leachate of step (5) carrying out heavy indium processing, heating rich indium leachate simultaneously makes it maintain 35-
50 DEG C, precipitating reagent then is added in the rich indium leachate of stirring, the pH value that rich indium leachate is adjusted after addition is 2.4-
2.9, the reaction system of rich indium leachate and precipitating reagent is made to react 1-5h under agitation.
10. the method for recovery indium in the caustic fusion slag according to claim 1 from jamesonite, it is characterised in that：Institute
The precipitating reagent for stating step (5) is sodium tripolyphosphate.
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