CN106495104A - A kind of method that sodium sulfide is produced based on vanadium extraction solid waste sodium sulfate - Google Patents
A kind of method that sodium sulfide is produced based on vanadium extraction solid waste sodium sulfate Download PDFInfo
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- CN106495104A CN106495104A CN201610864424.1A CN201610864424A CN106495104A CN 106495104 A CN106495104 A CN 106495104A CN 201610864424 A CN201610864424 A CN 201610864424A CN 106495104 A CN106495104 A CN 106495104A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/22—Alkali metal sulfides or polysulfides
- C01B17/24—Preparation by reduction
- C01B17/26—Preparation by reduction with carbon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention belongs to sodium sulfide production technical field, and in particular to a kind of solid waste sodium sulfate for producing metallurgical process for extracting vanadium is used for the method for producing sodium sulfide.Of the prior art relatively costly present in prior art for solving, coal consumption is big, and the waste residue of generation is more, is unfavorable for the technical problem of environmental protection；A kind of method that sodium sulfide is produced based on vanadium extraction solid waste sodium sulfate is provided, which includes step：A：Dispensing；B：Roasting；C：Transconversion into heat leaches；D：Slagging-off clarification；E:Evaporation and concentration.The solid waste sodium sulfate that the present invention is produced using process for extracting vanadium reduces cost of material as raw material by secondary for waste material use；Using coke powder as reducing agent, consumption of raw materials is reduced as reducing agent using the coal dust in pulverized coke instead traditional processing technology；The technological process of production of the present invention using dispensing, roasting, transconversion into heat leaching, slagging-off clarification, evaporation and concentration and crystallization, production cost are lower, to more environment-friendly, so that the present invention produces more preferable economic benefit and environmental benefit.
Description
Technical field
The invention belongs to sodium sulfide production technical field, and in particular to a kind of solid waste sulphuric acid for producing metallurgical process for extracting vanadium
Sodium is used for the method for producing sodium sulfide.
Background technology
Sodium sulfide is also known as smelly alkali, smelly soda, yellow alkali, akali sulphide.Sodium sulfide is inorganic compound, and pure sodium sulfide is colourless knot
Crystalline flour end.Moisture absorption is strong, soluble in water.Aqueous solution is reacted in strong basicity.Can cause to burn when touching skin and hair.Therefore sulfuration
Sodium is commonly called as akali sulphide.Sodium sulfide solution can lentamente be oxidized to sodium thiosulfate, sodium sulfite, sodium sulfate and many in atmosphere
Sodium sulfide.
The production method of existing sodium sulfide mainly has coal reduction method, absorption process, barium sulfide method and gas reducing process etc.,
And coal reduction method is in the industrial production using more.Coal reduction method is to mix Natrii Sulfas with coal dust according to proportioning at high temperature
Calcining reduction, obtains sodium sulfide product through subsequent treatment.However, the purity requirement of its raw material for adopting is higher, it is relatively costly,
During production, coal consumption is big simultaneously, and the waste residue of generation is more, is unfavorable for environmental protection.
Content of the invention
It is an object of the invention to solving technical problem present in prior art, there is provided a kind of low cost, utilization of energy
Rate is high, and the garbage of generation is few, the method for producing sodium sulfide based on vanadium extraction solid waste sodium sulfate of safety and environmental protection.
The purpose of the present invention is achieved through the following technical solutions：
A kind of method for producing sodium sulfide based on vanadium extraction solid waste sodium sulfate, including step：
A：Dispensing：Weigh solid waste sodium sulfate, coke powder and barium sulfide to be put in converter；
B：Roasting：Converter described in step A is heated, calcination is carried out, alkaline residue and molten sodium sulfide is generated；
C：Transconversion into heat leaches：Molten sodium sulfide described in step B is proceeded to stirring leaching in hot water, thick slag and one-level sulfuration is obtained
Sodium water solution；
D：Slagging-off clarification：One-level sodium sulfide solution described in step C is stood, after solid-liquid separation operation, fine slag and two is obtained
Level sodium sulfide solution；
E:Evaporation and concentration：By two grades of sodium sulfide solutions described in step D, evaporation and concentration, the sodium sulfide after being concentrated are water-soluble
Liquid.
Further improvement is also to include step F, F：Crystallization：Sodium sulfide solution cooling after the concentration that step E is obtained
Crystallization, obtains solid sodium sulfide.
Further improvement is that the particle diameter of the coke powder is less than 1mm.
Further improvement is that step B is heated to the converter using coal gas, and the temperature of the heating is
850-1100 DEG C, roasting time is 80-90min.
Further improvement is that waste heat of step A before solid waste sodium sulfate is weighed using converter is to solid waste sulphuric acid
Sodium is dried.
Further improvement is that the molten sodium sulfide in step C is first cooled to 500 DEG C and is proceeded in hot water again and soaks
Take, the temperature of the hot water is 80 ~ 100 DEG C.
Further improvement is also to include step G, and the thick slag that step C is produced is used as heating through washing, after filtering and turns
The fuel of stove.
Further improvement is that the time stood in step D is more than 12h, and the solid-liquid separation operation is alternating
Carry out once above standing and filter operation.
Further improvement is, according to weight than solid waste sodium sulfate in step A：Coke powder：Barium sulfide=85.36-
85.93：13.73-14.22：0.34-0.42 weighs solid waste sodium sulfate, coke powder and barium sulfide and is put in converter.
Further improvement is that step E is heated to two grades of sodium sulfide solutions of step D using converter waste heat
Evaporation.
The present invention relative to the beneficial effect of prior art is：
The solid waste sodium sulfate that the method that sodium sulfide is produced based on solid waste sodium sulfate of the present invention is produced using process for extracting vanadium is used as original
Secondary for waste material use is reduced cost of material by material；Using coke powder as reducing agent, using pulverized coke instead traditional processing technology in
Coal dust reduce consumption of raw materials as reducing agent, fix carbon content higher than coal dust 10% or so in coke powder and reduction can be substantially improved
Rate, reduces reducing agent consumption, the solid waste amount final so as to reduce this method；Coke powder volatility only 2%, so that fume emission ratio
6% is reduced using anthracite, adopted coke powder can be coke-oven plant's by-product, belong to secondary resource, more environmentally friendly；Using barium sulfide
As precipitant, can be by the sodium hydroxide contained in raw materials for production, sodium carbonate, sodium thiosulfate and sodium sulfite, more effectively
Be converted into sodium sulfide, so as to improve so that this method while the productivity ratio of sodium sulfide is lifted to greatest extent by raw material
Unnecessary impurity is removed；
The present invention produces the method for sodium sulfide using the thick Slag treatment that will be produced in method production process based on solid waste sodium sulfate
Afterwards, the raw material or other raw materials as heating converter is used so as to save energy resource consumption, improves energy utilization rate；Carry
For discharging after multiple for fine slag carrying out washing treatment, the less pollution to environment, by washing after solution carry out reuse, improve energy
Source utilization rate, reduces the pollution to environment, makes safer environmental protection of the invention；
The method based on solid waste sodium sulfate production sodium sulfide of the present invention is using dispensing, roasting, transconversion into heat leaching, slagging-off clarification, steaming
The technological process of production of concentration and crystallization is sent out, optimized production process causes the solid waste for producing less, and production cost is lower, to environment
More friendly, so that the present invention produces more preferable economic benefit and environmental benefit.
Specific embodiment
Technical scheme is described in detail with reference to embodiment, so that those skilled in the art is need not be through
In the case of crossing creative work, the record according to this specification realizes that technical scheme solves to exist in prior art
Problem, reach corresponding technique effect, it should be noted that within the spirit and principles in the present invention, that made any repaiies
Change, equivalent, improvement etc., belong to protection scope of the present invention.
A kind of method for producing sodium sulfide based on vanadium extraction solid waste sodium sulfate, including step：
A：Dispensing：Solid waste sodium sulfate, coke powder and barium sulfide are weighed according to weight ratio to be put in converter；
Moisture containing 20%-25% in the solid waste sodium sulfate produced due to process for extracting vanadium, for preferably remanufacture sodium sulfide
Need to be dried solid waste sodium sulfate raw materials for production using converter waste heat before production.In order to fully allow coke powder（C）With raw material
In sodium sulfate reaction generate sodium sulfide（Na2S）, need for coke ball milling to be machined to coke powder of the density less than 1mm
（C）.Solid waste sodium sulfate（Na2SO4）, coke powder（C）, barium sulfide（BaS）Proportioning is carried out according to corresponding ratio, is transported to after proportioning
Roasting converter material loading platform is stand-by.
B：Roasting：Converter described in step A is heated, calcination is carried out, alkaline residue and molten sodium sulfide is generated；
Sodium sulfate and coke powder, barium sulfide are added to converter.Burning coal gas is heated to converter as fuel, and furnace temperature reaches 850-
After 1100 DEG C, start chemical reaction in stove, after sodium sulfate reaction deoxidation, generate sodium sulfide, the hydroxide in barium sulfide and raw material
Sodium, sodium carbonate, sodium thiosulfate, sodium sulfite reaction generate sodium sulfide and barium hydroxide, barium sulfite, Barium hyposulfite., carbon
Sour barium, is fed to have reacted to come out of the stove and generally requires 80-90min.
C：Transconversion into heat leaches：Molten sodium sulfide described in step B is proceeded to stirring leaching in hot water, thick slag and one-level is obtained
Sodium sulfide solution；
After converter roasting, molten sodium sulfide natural cooling is cooled to 500 DEG C and is put into transconversion into heat leaching cylinder.Dissolved using sodium sulfide
In the chemical characteristic of water, sodium sulfide enters hot water（Water temperature 80-100 DEG C）Dissolving, after stirring and dissolving, is carried using three-level spiral
Thick slag is removed after rising machine washing slag（Main component is cinder, and content is 90%-95%）, the cinder after separating still has the heating of 1000K
Value, can be used to manufacture the construction materials such as cement, brick, can also mix saving fuel used in coal.Sodium sulfide after slagging-off is water-soluble
Liquid enters next process.
D：Slagging-off clarification：One-level sodium sulfide solution described in step C is stood, after solid-liquid separation operation, fine slag is obtained
With two grades of sodium sulfide solutions；
Sodium sulfide solution precipitation more than the 12h of thick slag is removed, then carries out a series of stirring, clarification, filtered, remove fine slag.
Alkali mud after sodium sulfide solution precipitation is put into 100 DEG C of boiling water and carries out secondary washing and filter pressing, waste water reclamation through pressure filter
Recycle, fine slag is transported outward.Remove the sodium sulfide solution after fine slag and enter next process.
E:Evaporation and concentration：By two grades of sodium sulfide solutions described in step D, evaporation and concentration, the sodium sulfide after being concentrated
Aqueous solution.
Remove the sodium sulfide solution after impurity and contain unnecessary moisture, the sodium sulfide solution after impurity will be removed and be put into
Sodium sulfide solution is carried out heating evaporation using converter waste heat by heating evaporation pot.Determined to evaporate sulfuration according to product hierarchy
Moisture in sodium water solution.Sodium sulfide is divided into 52-55% according to industry standard with sodium sulfide content；56-58%, 59-60% tri-
Grade.After sodium sulfide solution has been concentrated, lower one packaging process is entered.
Further improvement is also to include step F, F：Crystallization：Sodium sulfide solution cooling after the concentration that step E is obtained
Crystallization, obtains solid sodium sulfide.
Sodium sulfide solution temperature after concentration is at 80-90 DEG C, special less than the chemistry of 40 DEG C of crystallization and freezings using sodium sulfide
Property, during flake caustic unit carries out piece solution, flake caustic unit cylinder being cooled down using cold water, sodium sulfide solution is being rolled ibid
Crystallization and freezing, then scrapes the sodium sulfide of solidification with the blade of flake caustic unit, becomes sodium sulfide finished product.Treat that sodium sulfide is cooled to room temperature
After packed, pack and pack according to 25kg/ bags quota, pack according to three layers of national standard packaging.
Further improvement is that the particle diameter of the coke powder is less than 1mm.
Further improvement is that step B is heated to the converter using coal gas, and the temperature of the heating is
850-1100 DEG C, roasting time is 80-90min.
Further improvement is that the solid waste sodium sulfate includes following component：Sodium sulfate, ammonium sulfate, sodium hydroxide, carbon
Sour sodium, sodium sulfite, sodium thiosulfate, calcium oxide, iron sesquioxide, ammonium chloride, vanadic anhydride, silicon dioxide and water.
Further improvement is that waste heat of step A before solid waste sodium sulfate is weighed using converter is to solid waste sulphuric acid
Sodium is dried.
Further improvement is that the molten sodium sulfide in step C is first cooled to 500 DEG C and is proceeded in hot water again and soaks
Take, the temperature of the hot water is 80 ~ 100 DEG C.
Further improvement is that the time stood in step D is more than 12h, and the solid-liquid separation operation is alternating
Carry out once above standing and filter operation.
Further improvement is, according to weight than solid waste sodium sulfate in step A：Coke powder：Barium sulfide=85.36-
85.93：13.73-14.22：0.34-0.42 weighs solid waste sodium sulfate, coke powder and barium sulfide and is put in converter.
Further improvement is that step E is heated to two grades of sodium sulfide solutions of step D using converter waste heat
Evaporation.
Further improvement is also to include step G, and the thick slag that step C is produced is used as heating through washing, after filtering and turns
The fuel of stove.
Embodiment 1
A：Waste heat using converter before solid waste sodium sulfate is weighed is dried to solid waste sodium sulfate；The particle diameter of coke powder is crushed
To less than 1mm；Weigh solid waste sodium sulfate 8593kg, coke powder 1422kg and barium sulfide 42kg to be put in converter；
B：Temperature is carried out being heated to coal gas to the converter for 850 DEG C, is roasted to 90min, is generated alkaline residue and molten sulfuration
Sodium；
C：By the molten sodium sulfide natural cooling described in step B, it is cooled to 500 DEG C and is put into transconversion into heat leaching cylinder；Using sodium sulfide
The chemical characteristic of water is dissolved in, sodium sulfide is entered hot water water temperature and dissolved for 80 DEG C, after stirring and dissolving, carried using three-level spiral
After thick slag is removed after rising machine washing slag, thick slag and one-level sodium sulfide solution is obtained；The thick slag that step C is produced is through washing, mistake
It is used as the fuel of heating converter after filter；
D：Slagging-off clarification：12h is stood to the one-level sodium sulfide solution described in step C, is filtered, is stirred for, carries out standing, filter
It is repeated 3 times, removes fine slag；Alkali mud after sodium sulfide solution precipitation is put into 100 DEG C of boiling water and carries out secondary washing through pressure filter
Wash and filter pressing, waste water reclamation is recycled, fine slag is transported outward；
E:Evaporation and concentration：Heating evaporation concentration is carried out to two grades of sodium sulfide solutions of step D using converter waste heat, is concentrated
Sodium sulfide solution afterwards；
F：Crystallization：Sodium sulfide solution crystallisation by cooling after the concentration that step E is obtained, obtains solid sodium sulfide.
Embodiment 2
A：Waste heat using converter before solid waste sodium sulfate is weighed is dried to solid waste sodium sulfate；The particle diameter of coke powder is crushed
To less than 1mm；Weigh solid waste sodium sulfate 8536kg, coke powder 1373kg and barium sulfide 34kg to be put in converter；
B：Temperature is carried out being heated to coal gas to the converter for 1100 DEG C, is roasted to 80min, is generated alkaline residue and molten sulfuration
Sodium；
C：By the molten sodium sulfide natural cooling described in step B, it is cooled to 500 DEG C and is put into transconversion into heat leaching cylinder；Using sodium sulfide
The chemical characteristic of water is dissolved in, sodium sulfide enters hot water water temperature and dissolves for 100 DEG C, after stirring and dissolving, using three-level spiral
After thick slag is removed after elevator washery slag, obtain thick slag and one-level sodium sulfide solution；The thick slag process that step C is produced is washed,
It is used as the fuel of heating converter after filtration；
D：Slagging-off clarification：12h is stood to the one-level sodium sulfide solution described in step C, is filtered, is stirred for, carries out standing, filter
It is repeated 5 times, removes fine slag；Alkali mud after sodium sulfide solution precipitation is put in boiling water and carries out secondary washing and pressure through pressure filter
Filter, waste water reclamation are recycled, and fine slag is transported outward；
E:Evaporation and concentration：Heating evaporation concentration is carried out to two grades of sodium sulfide solutions of step D using converter waste heat, is concentrated
Sodium sulfide solution afterwards；
F：Crystallization：Sodium sulfide solution crystallisation by cooling after the concentration that step E is obtained, obtains solid sodium sulfide.
Embodiment 3
A：Waste heat using converter before solid waste sodium sulfate is weighed is dried to solid waste sodium sulfate；The particle diameter of coke powder is crushed
To less than 1mm；Weigh solid waste sodium sulfate 8556kg, coke powder 1390kg and barium sulfide 38kg to be put in converter；
B：Temperature is carried out being heated to coal gas to the converter for 900 DEG C, is roasted to 85min, is generated alkaline residue and molten sulfuration
Sodium；
C：By the molten sodium sulfide natural cooling described in step B, it is cooled to 500 DEG C and is put into transconversion into heat leaching cylinder；Using sodium sulfide
The chemical characteristic of water is dissolved in, sodium sulfide is entered hot water water temperature and dissolved for 90 DEG C, after stirring and dissolving, carried using three-level spiral
After thick slag is removed after rising machine washing slag, thick slag and one-level sodium sulfide solution is obtained；The thick slag that step C is produced is through washing, mistake
It is used as the fuel of heating converter after filter；
D：Slagging-off clarification：12h is stood to the one-level sodium sulfide solution described in step C, is filtered, is stirred for, carries out standing, filter
It is repeated 4 times, removes fine slag；Alkali mud after sodium sulfide solution precipitation is put into 95 DEG C of hot water and carries out secondary washing through pressure filter
And filter pressing, waste water reclamation recycling, fine slag are transported outward；
E:Evaporation and concentration：Heating evaporation concentration is carried out to two grades of sodium sulfide solutions of step D using converter waste heat, is concentrated
Sodium sulfide solution afterwards；
F：Crystallization：Sodium sulfide solution crystallisation by cooling after the concentration that step E is obtained, obtains solid sodium sulfide.
Test case
The solid waste sodium sulfate material composition that the process for extracting vanadium of this test case is produced is as shown in table 1, solid waste in addition to all the components in table 1
The also moisture containing 20% or so and a small amount of waste residue in sulphuric acid sodium raw materials.
Component content synopsis in 1 solid waste sodium sulfate of table
In process of production, in raw material sulphuric acid sodium（Na2SO4）In allocate coke powder into（C）, in converter, then it is heated to 850-1100
DEG C by carbon reduction generate sodium sulfide（Na2S）, main chemical reactions formula is：
Na2SO4+ 2C→Na2S+2CO2↑
As raw materials for production are different from domestic common coal reduction method production sodium sulfide（Na2S）Raw material, contain in raw materials for production
NaOH（Sodium hydroxide）、Na2CO3（Sodium carbonate）、Na2S2O3（Sodium thiosulfate）、Na2SO3（Sodium sulfite）, so in dispensing
During add barium sulfide（BaS）Impurity can be removed, Na is more effectively reclaimed2S（Sodium sulfide）, main chemical reactions formula is：
BaS+2NAOH=Ba(OH)2↓+Na2S
BaS + Na2SO3=BaSO3↓+Na2S
BaS+Na2S2O3=BaS2O3↓+Na2S
BaS+2NaCO3=BaCO3↓+Na2S
Reduced in consumption of raw materials coke powder as reducing agent using the coal dust in pulverized coke instead traditional processing technology and fix carbon content ratio
Coal dust high 10% or so can lift percent reduction, reduce reducing agent proportional quantity, produce less solid waste, pollution abatement.Coke powder
Volatility only 2% fume emission ratio reduces 6% using anthracite, and adopted coke powder can select coking plant by-products, belong to secondary
Resource, more environmentally friendly.
Record according to this specification can preferably realize technical scheme.
Claims (10)
1. a kind of based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that including step：
A：Dispensing：Weigh solid waste sodium sulfate, coke powder and barium sulfide to be put in converter；
B：Roasting：Converter described in step A is heated, calcination is carried out, alkaline residue and molten sodium sulfide is generated；
C：Transconversion into heat leaches：Molten sodium sulfide described in step B is proceeded to stirring leaching in hot water, thick slag and one-level sulfuration is obtained
Sodium water solution；
D：Slagging-off clarification：One-level sodium sulfide solution described in step C is stood, after solid-liquid separation operation, fine slag and two is obtained
Level sodium sulfide solution；
E:Evaporation and concentration：By two grades of sodium sulfide solutions described in step D, evaporation and concentration, the sodium sulfide after being concentrated are water-soluble
Liquid.
2. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that also include
Step F, F：Crystallization：Sodium sulfide solution crystallisation by cooling after the concentration that step E is obtained, obtains solid sodium sulfide.
3. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that Jiao
The particle diameter of powder is less than 1mm.
4. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that the step
Rapid B is heated to the converter using coal gas, and the temperature of the heating is 850-1100 DEG C, and roasting time is 80-90min.
5. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that the step
Rapid A was dried to solid waste sodium sulfate using the waste heat of converter before solid waste sodium sulfate is weighed.
6. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that the step
Molten sodium sulfide in rapid C is first cooled to 500 DEG C and is proceeded in hot water again and leaches, and the temperature of the hot water is 80 ~ 100 DEG C.
7. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that also include
Step G, the thick slag that step C is produced are used as the fuel of heating converter through washing, after filtering.
8. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that the step
The time stood in rapid D is more than 12h, and the solid-liquid separation operation is alternately once above standing and filter operation.
9. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that the step
According to weight than solid waste sodium sulfate in rapid A：Coke powder：Barium sulfide=85.36-85.93：13.73-14.22：0.34-0.42 weighs solid
Waste Sulfuric Acid sodium, coke powder and barium sulfide are put in converter.
10. according to claim 1 based on vanadium extraction solid waste sodium sulfate produce sodium sulfide method, it is characterised in that described
Step E carries out heating evaporation using converter waste heat to two grades of sodium sulfide solutions of step D.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704303A (en) * | 2020-07-09 | 2020-09-25 | 攀枝花学院 | Drying method of evaporation crystallization liquid of vanadium precipitation wastewater and method for recycling sodium sulfide |
| CN112011692A (en) * | 2020-09-23 | 2020-12-01 | 攀钢集团研究院有限公司 | Method for extracting vanadium by composite roasting of solid waste slag |
| CN112010266A (en) * | 2020-08-04 | 2020-12-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing sodium sulfide by melting reduction of industrial sodium sulfate |
| CN112079336A (en) * | 2020-09-11 | 2020-12-15 | 刘德奎 | Kiln system and method for producing sodium sulfide by using industrial hazardous waste sodium sulfate |
-
2016
- 2016-09-29 CN CN201610864424.1A patent/CN106495104A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704303A (en) * | 2020-07-09 | 2020-09-25 | 攀枝花学院 | Drying method of evaporation crystallization liquid of vanadium precipitation wastewater and method for recycling sodium sulfide |
| CN111704303B (en) * | 2020-07-09 | 2022-06-21 | 攀枝花学院 | Drying method of evaporation crystallization liquid of vanadium precipitation wastewater and method for recycling sodium sulfide |
| CN112010266A (en) * | 2020-08-04 | 2020-12-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing sodium sulfide by melting reduction of industrial sodium sulfate |
| CN112079336A (en) * | 2020-09-11 | 2020-12-15 | 刘德奎 | Kiln system and method for producing sodium sulfide by using industrial hazardous waste sodium sulfate |
| CN112011692A (en) * | 2020-09-23 | 2020-12-01 | 攀钢集团研究院有限公司 | Method for extracting vanadium by composite roasting of solid waste slag |
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