CN108842073A - A kind of method of alkaline process processing zinc cadmium slag - Google Patents
A kind of method of alkaline process processing zinc cadmium slag Download PDFInfo
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- CN108842073A CN108842073A CN201810558757.0A CN201810558757A CN108842073A CN 108842073 A CN108842073 A CN 108842073A CN 201810558757 A CN201810558757 A CN 201810558757A CN 108842073 A CN108842073 A CN 108842073A
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/06—Sulfates
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/24—Obtaining zinc otherwise than by distilling with leaching with alkaline solutions, e.g. ammonia
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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
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
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Abstract
The present invention provides a kind of methods of alkaline process processing zinc cadmium slag, include the following steps：(1) zinc cadmium slag is dipped in NaOH solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；(2) after the cadmium slag being washed with water, useless cadmium slag and the first wash water are obtained；(3) the zincic acid sodium solution, the first wash water are mixed with calcium hydroxide, after precipitation reaction, filtering obtains spent lye and calcium zincates crude product；(4) after the calcium zincates crude product being washed with water, purification calcium zincates and the second wash water are obtained；(5) preparation steps (1) described NaOH solution is used for after mixing the spent lye with the second wash water；(6) the purification calcium zincates are mixed with sulfuric acid, is filtered after carrying out acidolysis reaction, obtains solution of zinc sulfate and calcium sulphate solid.The method of alkaline process processing zinc cadmium slag of the invention is not needed using zinc powder, and zinc can be recycled effectively, realize Zero discharge, and can produce calcium sulfate.
Description
Technical field
The present invention relates to zinc cadmium slag processing technology field more particularly to a kind of methods of alkaline process processing zinc cadmium slag.
Background technique
A large amount of zinc cadmium slags can be generated in the purification and impurity removal process of Zinc hydrometallurgy process, wherein zinc is with the shape of ZnO and Zn simple substance
Formula exists, and cadmium is with CdO, Cd simple substance and Cd (OH)2Form exist.Traditional treatment method to zinc cadmium slag is the acid-hatching of young eggs, i.e.,
Then zinc cadmium slag sulfuric acid dissolution adjusts the pH value of solution to certain acidity, is added in zinc dust precipitation solution under preference temperature
Cadmium, become Spongy Cadmium precipitation, then according to the purity of gained Spongy Cadmium, decide whether again it is again sour molten, then into
Row zinc dust precipitation, gained solution of zinc sulfate condensing crystallizing industrial sulphuric acid zinc or sends to production electrolytic zinc.The technical maturity is stablized,
It is easily operated, but due to acidleach after, need to carry out using zinc powder displacement removal cadmium, cause the processing cost of zinc cadmium slag higher.
Summary of the invention
The purpose of the present invention is to provide a kind of method of alkaline process processing zinc cadmium slag, this method does not need that Zn powder substitution is added
Cadmium, to reduce the processing cost of zinc cadmium slag.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical scheme：
A kind of method of alkaline process processing zinc cadmium slag, includes the following steps：
(1) zinc cadmium slag is dipped in NaOH solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；
(2) after the cadmium slag being washed with water, useless cadmium slag and the first wash water are obtained；
(3) the zincic acid sodium solution, the first wash water are mixed with calcium hydroxide, after precipitation reaction, filtering obtains spent lye
With calcium zincates crude product；
(4) after the calcium zincates crude product being washed with water, purification calcium zincates and the second wash water are obtained；
(5) preparation steps (1) described NaOH solution is used for after mixing the spent lye with the second wash water；
(6) the purification calcium zincates are mixed with sulfuric acid, is filtered after carrying out acidolysis reaction, obtains solution of zinc sulfate and sulfuric acid
Calcium solid；
The step (5) and step (6) the not restriction of sequencing in time.
Preferably, the concentration of the NaOH solution is 7~8mol/L.
Preferably, the ratio between volume of quality (dry weight) Yu NaOH solution of the zinc cadmium slag is 1g:2.5~3.5mL.
Preferably, the temperature of the alkali soluble reaction is 55~65 DEG C, and the time of the alkali soluble reaction is 1.5~2.5h.
Preferably, in terms of the sum of amount of substance of sodium zincate in zincic acid sodium solution and the first wash water, the sodium zincate with
The molar ratio of calcium hydroxide is 1:0.8~0.9.
Preferably, the concentration of the sulfuric acid is 135~145g/L.
Preferably, the ratio between the quality of the calcium zincates and the volume of sulfuric acid are 1g:8~12mL.
Preferably, the time of the acidolysis reaction is 1~2h.
Preferably, the ratio between the quality (dry weight) of cadmium slag and the volume of water are 1g in the step (2):3~3.5mL.
Preferably, the ratio between the quality (dry weight) of calcium zincates crude product and the volume of water are 1g in the step (4):3~4mL.
The present invention provides a kind of methods of alkaline process processing zinc cadmium slag, include the following steps：(1) zinc cadmium slag is dipped in NaOH
In solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；(2) after cadmium slag being washed with water, obtain useless cadmium slag and
First wash water；(3) the zincic acid sodium solution, the first wash water are mixed with calcium hydroxide, after precipitation reaction, filtering obtains salkali waste
Liquid and calcium zincates crude product；(4) after the calcium zincates crude product being washed with water, purification calcium zincates and the second wash water are obtained；(5) by institute
It states after spent lye is mixed with the second wash water for preparation steps (1) described NaOH solution；(6) by the purification calcium zincates and sulfuric acid
Mixing filters after carrying out acidolysis reaction, obtains solution of zinc sulfate and calcium sulphate solid；The step (5) and step (6) are in the time
On not no sequencing restriction.Zinc cadmium slag is dipped in NaOH solution by the present invention, is converted sodium zincate for zinc, is dissolved in solution
In, to realize the separation of zinc cadmium；By mixing zincic acid sodium solution with calcium hydroxide, calcium zincates are generated, zinc is separated；It will
Purification calcium zincates are mixed with sulfuric acid, carry out acidolysis reaction, generate calcium sulfate precipitation and solution of zinc sulfate, and calcium sulfate can be used as
Product is sold, and solution of zinc sulfate can return to electrolytic zinc workshop for electrolytic zinc, or for producing monohydrate zinc sulphate；In addition, useless
Lye and wash water can be recycled for preparing NaOH solution, realize the zero-emission of waste liquid.As it can be seen that alkaline process provided by the present invention
The method of processing zinc cadmium slag does not need the zinc powder using valuableness, and the zinc in zinc cadmium slag can be recycled effectively, and be realized useless
Liquid zero-emission, while calcium sulfate can be produced.
Detailed description of the invention
The process flow chart of Fig. 1 alkaline process processing zinc cadmium slag of the present invention.
Specific embodiment
The present invention provides a kind of methods of alkaline process processing zinc cadmium slag, include the following steps：
(1) zinc cadmium slag is dipped in NaOH solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；
(2) after the cadmium slag being washed with water, useless cadmium slag and the first wash water are obtained；
(3) the zincic acid sodium solution, the first wash water are mixed with calcium hydroxide, after precipitation reaction, filtering obtains spent lye
With calcium zincates crude product；
(4) after the calcium zincates crude product being washed with water, purification calcium zincates and the second wash water are obtained；
(5) preparation steps (1) described NaOH solution is used for after mixing the spent lye with the second wash water；
(6) the purification calcium zincates are mixed with sulfuric acid, is filtered after carrying out acidolysis reaction, obtains solution of zinc sulfate and sulfuric acid
Calcium solid；
The step (5) and step (6) the not restriction of sequencing in time.
The process flow chart of the method for alkaline process processing zinc cadmium slag provided by the invention is as shown in Figure 1, zinc cadmium slag is dipped in
In NaOH solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；Cadmium slag, will wherein a small amount of zincic acid through water washing
Sodium is dissolved in the first wash water, obtains useless cadmium slag and the first wash water；Useless cadmium slag muck is deposited；By the first wash water and zincic acid sodium solution and disappear
Lime mixing, generates zincic acid calcium precipitate, calcium zincates crude product and spent lye is obtained by filtration；Calcium zincates crude product can be incited somebody to action through water washing
Sodium zincate therein is dissolved in the second wash water, obtains purification calcium zincates and the second wash water；There is also not anti-on a small quantity in spent lye
The sodium zincate answered mixes the second wash water with spent lye, can be used for preparing the leaching of leachate (i.e. NaOH solution) for zinc cadmium slag
Out, recycling for waste liquid is realized；Purification calcium zincates are mixed with sulfuric acid, generate calcium sulfate precipitation and zinc sulfate, wherein sulfuric acid
Zinc is dissolved in solution, by filtering, obtains solution of zinc sulfate and calcium sulfate, calcium sulfate can be used as construction material and sell, and sulfuric acid
Zinc solution can directly return to electrolytic zinc workshop for electrolytic zinc, can be used for production monohydrate zinc sulphate.
Zinc cadmium slag is dipped in NaOH solution by the present invention, and after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration.
In the present invention, the concentration of the NaOH solution is preferably 7~8mol/L, more preferably 7.5mol/L.
In the present invention, the ratio between volume of quality (dry weight) Yu NaOH solution of the zinc cadmium slag is preferably 1g:2.5~
3.5mL, more preferably 1g:2.8~3.2mL.
In the present invention, the temperature of the alkali soluble reaction is preferably 55~65 DEG C, and more preferably 60 DEG C；The alkali soluble reaction
Time be preferably 1.5~2.5h, more preferably 2.0h；The time of the alkali soluble reaction preferably temperature needed for reaching alkali soluble reaction
It is counted when spending.
In the present invention, stirring is preferably remained in the alkali soluble reaction process；Revolving speed of the present invention to the stirring
It is not particularly limited, using conventional speed of agitator.
In the present invention, the alkali soluble reaction products therefrom can be cooled to room temperature is filtered again, can not also cool down straight
It connects and is filtered；Upon cooling to room temperature, the present invention is not particularly limited the rate of the cooling, can be any cooling speed
Rate；In embodiments of the present invention, the cooling is preferably natural cooling.
After obtaining cadmium slag and zincic acid sodium solution, after the cadmium slag is washed with water the present invention, obtains useless cadmium slag and first and wash
Water.In the present invention, cadmium slag is washed, the sodium zincate in cadmium slag can be dissolved in wash water, to make zinc cadmium discretely more
Sufficiently.
The present invention is not particularly limited the mode of washing of the cadmium slag, using conventional mode of washing, in this hair
In bright embodiment, the mode of washing preferably mixes cadmium slag and water, stirs 30min, then filters, and obtains useless cadmium slag and the
One wash water；Present invention preferably employs a certain amount of water to wash repeatedly cadmium slag, i.e., after the completion of once washing, gained wash water after
Continue for washing next time；In the present invention, the washing times of the cadmium slag are preferably 3~5 times；The quality of the cadmium slag
The ratio between volume of (dry weight) and water preferably 1g:3~3.5mL.
After the washing for completing cadmium slag, the present invention mixes the zincic acid sodium solution, the first wash water with calcium hydroxide, anti-through precipitating
Ying Hou, filtering, obtains spent lye and calcium zincates crude product.
In the present invention, in terms of the sum of amount of substance of sodium zincate in zincic acid sodium solution and the first wash water, the zincic acid
The molar ratio of sodium and calcium hydroxide is preferably 1:0.8~0.9.In the present invention, the amount of the substance of the sodium zincate preferably passes through pole
The content of zinc, is then calculated the amount of the substance of sodium zincate in spectrum analysis zincic acid sodium solution and the first wash water.
The present invention is not particularly limited the source of the calcium hydroxide, can be commercially available calcium hydroxide, can also be by CaO and water
Preparation obtains.In embodiments of the present invention, it is preferred to use the mode of matching while using, by CaO and water mixed preparing calcium hydroxide；It is described
Matching while using can reduce calcium hydroxide and CO to the greatest extent2Reaction, to guarantee the activity of calcium hydroxide used.
The present invention is not particularly limited the order by merging of the zincic acid sodium solution, the first wash water and calcium hydroxide, Ke Yiwei
Any order by merging.
In the present invention, the temperature of the precipitation reaction is preferably room temperature；The time of the precipitation reaction is preferably 1~
2h, more preferably 1h；Stirring is preferably remained during the precipitation reaction；The present invention is to the revolving speed of the stirring without spy
It is different to limit, using conventional speed of agitator.
After obtaining spent lye and calcium zincates crude product, after calcium zincates crude product is washed with water the present invention, purification calcium zincates are obtained
With the second wash water.In the present invention, calcium zincates crude product is washed, can by calcium zincates crude product sodium zincate and alkali sufficiently wash
Out, and then the higher calcium zincates of purity are obtained.
The present invention is not particularly limited the mode of washing of the calcium zincates crude product, using conventional mode of washing,
In embodiments of the present invention, the mode of washing preferably mixes calcium zincates crude product and water, stirs 30min, then filters, obtain
To purification calcium zincates and the second wash water；Present invention preferably employs a certain amount of water to wash repeatedly calcium zincates crude product, i.e., and one
After the completion of secondary washing, gained wash water continues on for washing next time；In the present invention, the washing times of the calcium zincates crude product
Preferably 3~5 times；The ratio between quality (dry weight) and the volume of water of the calcium zincates crude product are preferably 1g:3~4mL.
After completing to the washing of calcium zincates crude product, the present invention is back to zinc cadmium slag after mixing spent lye with the second wash water
(i.e. alkali soluble reaction) step is leached, for preparing NaOH solution；The purification calcium zincates are mixed with sulfuric acid, it is anti-to carry out acidolysis
It answers, acidolysis reaction products therefrom is filtered, solution of zinc sulfate and calcium sulphate solid are obtained.
In embodiments of the present invention, it after preferably mixing spent lye with the second wash water, is concentrated by evaporation to zinc cadmium slag and is leached
NaOH concentration needed for (i.e. alkali soluble reaction) is then directly used for the leaching (i.e. alkali soluble reaction) of zinc cadmium slag.
In the present invention, the concentration of the sulfuric acid is preferably 135~145g/L, more preferably 140g/L.
In the present invention, the ratio between the quality (dry weight) of the calcium zincates and the volume of sulfuric acid preferably 1g:8~12mL, more
Preferably 1g:10ml.
In the present invention, the time of the acidolysis reaction is preferably 1~2h, more preferably 1h；The temperature of the acidolysis reaction
Degree is preferably room temperature；Stirring is preferably remained during the acidolysis reaction；The present invention is to the revolving speed of the stirring without spy
It is different to limit, using conventional speed of agitator.
After the filtering for completing acidolysis reaction products therefrom, preferably filtering gained calcium sulfate wet product is dried by the present invention,
Obtain calcium sulfate.
The present invention is not particularly limited the mode of the drying, can obtain the calcium sulfate of constant weight.In the present invention
In, gained calcium sulfate can be used as construction material sale.
In the present invention, after the filtering of acidolysis reaction products therefrom, obtained solution of zinc sulfate can directly return to electrolytic zinc
Workshop mentions zinc for being electrolysed；Monohydrate zinc sulphate can also be prepared by being concentrated by evaporation.
It is described in detail below with reference to method of the embodiment to alkaline process provided by the invention processing zinc cadmium slag, but not
They can be interpreted as limiting the scope of the present invention.
Embodiment 1
(1) 1000g (dry weight) zinc cadmium slag is mixed with the NaOH solution that 3000mL concentration is 7.5mol/L, is heated to 60
DEG C, after alkali soluble reacts 2h, it is naturally cooling to room temperature, is filtered, 2800mL zincic acid sodium solution and 478g cadmium slag are obtained；Wherein zinc cadmium
Mass percentage containing Zn element in slag is that the mass percentage of 26.5%, Cd element is 27.41%；Using polarogram point
The Zn content that analysis method tests zincic acid sodium solution is 91.8g/L；
(2) the cadmium slag is mixed with 1500mL water, stirs 30min, then filters, complete to wash for the first time；It used
Filter gained filtrate is repeated twice above-mentioned washing process, obtains the first wash water of 476g cadmium slag and 1420mL；It is surveyed using polarogarphy
Trying Zn content in the first wash water is 0.86g/L, and the leaching rate for being computed Zn is 97.5%；
(3) amount that calculates the total material of sodium zincate in zincic acid sodium solution and the first wash water, according to the total material of sodium zincate
The ratio between amount and the amount of substance of calcium hydroxide are 1:0.8 ratio mixes the zincic acid sodium solution, the first wash water and calcium hydroxide,
Room temperature carry out precipitation reaction, react 1h after, precipitation reaction products therefrom is filtered, obtain 416.87g calcium zincates crude product and
4120mL spent lye；
(4) the calcium zincates crude product is mixed with 1500mL water, stirs 30min, then filters, complete to wash for the first time；
It is repeated twice above-mentioned washing process using filtering gained filtrate, obtains 409.67g purification calcium zincates and the second wash water of 1340mL；
(5) the second wash water is mixed with the spent lye, the NaOH for detecting gained mixed liquor using titration with hydrochloric acid method is dense
Degree, is then evaporated concentration for gained mixed liquor, until the concentration of gained mixed liquor reaches 4~5mol/L；
(6) purification calcium zincates and the 4000mL concentration is mixed for the sulfuric acid of 140g/L to (calcium zincates dry weight and sulfuric acid
Volume ratio is 1g:10mL), acidolysis reaction is carried out in room temperature, after reacting 2h, filtering obtains 3750mL solution of zinc sulfate；Through polarogram
It is 50.32g/L that analysis, which obtains Zn content in solution of zinc sulfate, and being computed and recycling the rate of recovery of zinc from calcium zincates is 97.08%.
(7) solution of zinc sulfate is obtained into monohydrate zinc sulphate after being concentrated by evaporation, is detected with EDTA compleximetry
Zn content into monohydrate zinc sulphate is 34.89%.
Embodiment 2
(1) 1000g (dry weight) zinc cadmium slag is mixed with the NaOH solution that 3500ml concentration is 7.5mol/L, is heated to 60
DEG C, after aqueous slkali reacts 2h, it is naturally cooling to room temperature, 3275ml zincic acid sodium solution and 479g cadmium slag is obtained by filtration；Wherein zinc
Mass percentage containing Zn element in cadmium slag is that the mass percentage of 26.5%, Cd element is 27.41%；Using polarogram
The Zn content that analytic approach tests zincic acid sodium solution is 78.65g/L；
(2) the cadmium slag is mixed with 1200ml water, stirs 30min, then filters, complete to wash for the first time；It used
Filter gained filtrate is repeated twice above-mentioned washing process, obtains the first wash water of 477.8g cadmium slag and 1160ml；Using polarogarphy
Testing Zn content in the first wash water is 0.0097g/L, and the leaching rate for being computed Zn is 98.3%；
(3) test the Zn content in zincic acid sodium solution and the first wash water with polarogarphy, and calculate zincic acid sodium solution and
The amount of total substance of sodium zincate in first wash water is according to the ratio between the amount of the total material of sodium zincate and amount of substance of calcium hydroxide
1:0.9 ratio mixes the zincic acid sodium solution, the first wash water and calcium hydroxide, after room temperature carries out precipitation reaction 1h, will sink
The reaction products therefrom that forms sediment filters, and obtains 473.95g calcium zincates crude product and 4325ml spent lye；
(4) the calcium zincates crude product is mixed with 1450mL water, stirs 30min, then filters, complete to wash for the first time,
It is repeated twice above-mentioned washing process using filtering gained filtrate, obtains 471g purification calcium zincates and the second wash water of 1300ml；
(5) the second wash water is mixed with the spent lye, is detected using titration with hydrochloric acid method, the NaOH of gained mixed liquor is dense
Degree, is then evaporated concentration for gained mixed liquor, until the concentration of gained mixed liquor reaches 4~5mol/L；
(6) purification calcium zincates and the 4500mL concentration is mixed for the sulfuric acid of 140g/L to (calcium zincates dry weight and sulfuric acid
Volume ratio is 1g:10mL), acidolysis reaction is carried out in room temperature, is filtered after reacting 2h, 4230mL solution of zinc sulfate is obtained, through polarogram
It analyzes, the Zn content in solution of zinc sulfate is 51.45g/L, is computed, and the rate of recovery that zinc is recycled from calcium zincates is 97.4%；
(7) solution of zinc sulfate is obtained into monohydrate zinc sulphate after evaporating, detects to obtain one with EDTA compleximetry
Water zinc sulphate content is 35%.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method of alkaline process processing zinc cadmium slag, includes the following steps：
(1) zinc cadmium slag is dipped in NaOH solution, after alkali soluble is reacted, zincic acid sodium solution and cadmium slag is obtained by filtration；
(2) after the cadmium slag being washed with water, useless cadmium slag and the first wash water are obtained；
(3) the zincic acid sodium solution, the first wash water are mixed with calcium hydroxide, after precipitation reaction, filtering obtains spent lye and zinc
Sour calcium crude product；
(4) after the calcium zincates crude product being washed with water, purification calcium zincates and the second wash water are obtained；
(5) preparation steps (1) described NaOH solution is used for after mixing the spent lye with the second wash water；
(6) the purification calcium zincates are mixed with sulfuric acid, is filtered after carrying out acidolysis reaction, obtained solution of zinc sulfate and calcium sulfate is solid
Body；
The step (5) and step (6) the not restriction of sequencing in time.
2. the method for alkaline process according to claim 1 processing zinc cadmium slag, which is characterized in that the concentration of the NaOH solution is
7~8mol/L.
3. the method for alkaline process according to claim 2 processing zinc cadmium slag, which is characterized in that the quality of the zinc cadmium slag with
The ratio between volume of NaOH solution is 1g:2.5~3.5mL.
4. the method for described in any item alkaline process processing zinc cadmium slags according to claim 1~3, which is characterized in that the alkali soluble is anti-
The temperature answered is 55~65 DEG C, and the time of the alkali soluble reaction is 1.5~2.5h.
5. the method for alkaline process processing zinc cadmium slag according to claim 1, which is characterized in that washed with zincic acid sodium solution and first
The molar ratio of the sum of amount of substance of sodium zincate in water meter, the sodium zincate and calcium hydroxide is 1:0.8~0.9.
6. the method for alkaline process processing zinc cadmium slag according to claim 1, which is characterized in that the concentration of the sulfuric acid is 135
~145g/L.
7. the method for alkaline process processing zinc cadmium slag according to claim 6, which is characterized in that the quality and sulphur of the calcium zincates
The ratio between volume of acid is 1g:8~12mL.
8. the method for alkaline process according to claim 1 processing zinc cadmium slag, which is characterized in that the time of the acidolysis reaction is
1~2h.
9. the method for alkaline process processing zinc cadmium slag according to claim 1, which is characterized in that cadmium slag in the step (2)
The ratio between quality and the volume of water are 1g:3~3.5mL.
10. the method for alkaline process processing zinc cadmium slag according to claim 1, which is characterized in that calcium zincates in the step (4)
The ratio between quality and the volume of water of crude product are 1g:3~4mL.
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| CN109455754A (en) * | 2019-01-02 | 2019-03-12 | 森克创能(天津)新能源科技有限公司 | A kind of zinc-nickel battery anode material calcium zincate synthesis technology and equipment |
| CN110699547A (en) * | 2019-08-23 | 2020-01-17 | 白银有色集团股份有限公司 | Method for recovering zinc and cadmium from waste alkaline residues |
| CN113122735A (en) * | 2021-04-02 | 2021-07-16 | 云南云铜锌业股份有限公司 | Alkali-process zinc powder combined smelting method |
| CN115557719A (en) * | 2022-08-16 | 2023-01-03 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109455754A (en) * | 2019-01-02 | 2019-03-12 | 森克创能(天津)新能源科技有限公司 | A kind of zinc-nickel battery anode material calcium zincate synthesis technology and equipment |
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| CN113122735A (en) * | 2021-04-02 | 2021-07-16 | 云南云铜锌业股份有限公司 | Alkali-process zinc powder combined smelting method |
| CN113122735B (en) * | 2021-04-02 | 2022-11-15 | 云南云铜锌业股份有限公司 | Alkali-process zinc powder combined smelting method |
| CN115557719A (en) * | 2022-08-16 | 2023-01-03 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
| CN115557719B (en) * | 2022-08-16 | 2023-08-15 | 湖北祥云(集团)化工股份有限公司 | Comprehensive treatment method of phosphogypsum |
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