CN1289394C - Prepn process of recovering boric acid and magnesium sulfate from evaporation concentrated boric acid mother liquor in salt field - Google Patents
Prepn process of recovering boric acid and magnesium sulfate from evaporation concentrated boric acid mother liquor in salt field Download PDFInfo
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- CN1289394C CN1289394C CN 200510020275 CN200510020275A CN1289394C CN 1289394 C CN1289394 C CN 1289394C CN 200510020275 CN200510020275 CN 200510020275 CN 200510020275 A CN200510020275 A CN 200510020275A CN 1289394 C CN1289394 C CN 1289394C
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- boric acid
- magnesium sulfate
- sal epsom
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Abstract
The present invention relates to technology for once producing boric acid from boron mineral, particularly to a novel method for adopting salt fields to evaporate and concentrate mother liquor of boric acid to recover boric acid and magnesium sulfate, which has the preparing technology that firstly, mother liquor of boric acid is led into a salt field, the mother liquor in the salt field is evaporated and concentrated to separate out boric acid and magnesium sulfate, and mixed salt containing boric acid and magnesium sulfate is collected for floatation; secondly, after the floatation procedure, wet boric acid is prepared by foam separation, and the wet boric acid is refined to obtain products of boric acid; thirdly, the wet boric acid obtained from separation can also be sent back to a boric acid production line to be processed into products of boric acid; fourthly, after the floatation procedure, slag is selected and separated to obtain wet magnesium sulfate, and the wet magnesium sulfate is dried to obtain products of magnesium sulfate. The method of the present invention has the advantages that resources of boric acid and magnesium sulfate are effectively recovered, the recovery rate of boric acid is high, and the quality of magnesium sulfate is favorable; environmental pollution caused by the discharge of mother liquor of boric acid is solved. The method of the present invention has characteristics of little investment, simple technology, low cost and high economic benefit.
Description
Technical field
The present invention relates to single stage method and produce boric acid technology, particularly relate to a kind of novel method that adopts salt pan evaporation concentration mother liquid of boric acid to reclaim boric acid and sal epsom.
Background technology
Existing single stage method boric acid production technique is to adopt the sulfuric acid process boric ore to produce boric acid, and its main technique flow process is that boron magnesium ore deposit and sulfuric acid mixing and water adding carry out acidifying, filter, and crystallisation by cooling, centrifugation adds water washing, and drying makes the boric acid product.When using one ton of boric acid of this prepared, approximately generate the mother liquor about 7 tons, contain the boric acid of 2%-8% in the mother liquor approximately, the sal epsom of 25%-29%.The small part mother liquor uses in technological cycle, and most of mother liquor discharging is discarded.The boric acid and the sal epsom resource that exist in the mother liquor are not only wasted in a large amount of dischargings of mother liquor, and cause the pollution to environment.Adopt the method recovery boric acid of evaporation concentration mother liquor and the mixed salt of sal epsom, obtain boric acid and sal epsom through flotation again, this method facility investment is big, energy consumption is high, cost is high, benefit is low, can not generally adopt.At present, the boric acid in the recovery production mother liquid of boric acid and the novel process that facility investment is little, energy consumption is low, cost is low of sal epsom yet there are no record.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency that exists at prior art, provide a kind of salt pan evaporation concentration mother liquid of boric acid to reclaim the novel method of boric acid and sal epsom, this preparation method utilizes solar thermal energy to carry out the evaporation concentration of mother liquid of boric acid, and facility investment is little, energy consumption is low, cost is low, high efficiency.
Salt pan of the present invention evaporation concentration mother liquid of boric acid reclaims the preparation method of boric acid and sal epsom, and be achieved by following technical proposals: this preparation method is:
A, mother liquid of boric acid is imported the salt pan, the salt pan evaporation concentration is separated out boric acid and sal epsom crystallization, gathers the mixed salt of borated sal epsom, adopts floatation process to separate boric acid and sal epsom, a small amount of mixed salt is taken out directly return in the boric acid production process;
B, after the flotation operation, be provided with: foam separation, produce wet boric acid and the refining boric acid product sequence of carrying;
C, behind the wet boric acid that described separation obtains, be provided with and return the processing of boric acid production line and make the boric acid product sequence;
D, after described flotation operation, be provided with: select slag, separate wet sal epsom and dry sal epsom product sequence;
The preparation method that salt pan of the present invention evaporation concentration mother liquid of boric acid reclaims boric acid and sal epsom compared with prior art has following beneficial effect: the present invention utilizes solar thermal energy to carry out salt pan evaporation concentration mother liquid of boric acid and reclaims boric acid, sal epsom, boric acid and sal epsom resource have been reclaimed effectively, boric acid rate of recovery height, its rate of recovery is greater than 80%, the sal epsom quality is good, and sal epsom content is greater than 95%; Solved mother liquid of boric acid and caused pollution to environment because of discharging.The inventive method less investment, technology is simple, cost is low, economic benefit is high.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 reclaims preparation method's schema of boric acid and sal epsom for salt pan of the present invention evaporation concentration mother liquid of boric acid.
Embodiment
Below in conjunction with drawings and Examples technical solution of the present invention is further described.This preparation method is:
A, mother liquid of boric acid is imported the salt pan, the salt pan evaporation concentration is separated out boric acid and sal epsom crystallization, gathers the mixed salt of borated sal epsom, adopts floatation process to separate boric acid and sal epsom, a small amount of mixed salt is taken out directly return in the boric acid production process;
B, after the flotation operation, be provided with: foam separation, produce wet boric acid and the refining boric acid product sequence of carrying;
C, behind the wet boric acid that described separation obtains, be provided with and return the processing of boric acid production line and make the boric acid product sequence;
D, after described flotation operation, be provided with: select slag, separate wet sal epsom and dry sal epsom product sequence;
Filtrate after described flotation froth separates and flotation selects slag to separate is returned floatation system continuation flotation.
Described salt pan evaporation concentration is carried out evaporation concentration for utilizing solar thermal energy.
Embodiment 1
Mother liquid of boric acid is imported the salt pan, utilize solar thermal energy (being Exposure to Sunlight) to carry out evaporation concentration, obtain the mixed salt of borated sal epsom; Carry out flotation with flotation machine again, boric acid enters foam layer, separates the back and reclaims wet boric acid, and wet boric acid is again through making with extra care or returning the boric acid production line and be processed into the boric acid product.The sal epsom that must wet after selecting slag to separate obtains the sal epsom product after the drying.
Claims (3)
1, the preparation method of a kind of salt pan evaporation concentration mother liquid of boric acid recovery boric acid and sal epsom, it is characterized in that: this preparation method is:
A, mother liquid of boric acid is imported the salt pan, carry out the evaporation concentration mother liquid of boric acid, boric acid and sal epsom crystallization are separated out, gather the mixed salt of boronic acid containing and sal epsom, adopt floatation process to separate boric acid and sal epsom, a small amount of mixed salt is directly returned in the boric acid production process;
B, after the flotation operation, be provided with: foam separation, produce wet boric acid and the refining boric acid product sequence of carrying;
C, behind the wet boric acid that described separation obtains, be provided with and return the processing of boric acid production line and make the boric acid product sequence;
D, after described flotation operation, be provided with: select slag separate wet sal epsom and dry sal epsom product sequence.
2, salt pan according to claim 1 evaporation concentration mother liquid of boric acid reclaims the preparation method of boric acid and sal epsom, it is characterized in that: the filtrate after described flotation froth separates and flotation selects slag to separate is returned floatation system continuation flotation.
3, the preparation method of salt pan evaporation concentration mother liquid of boric acid recovery boric acid according to claim 1 and sal epsom, it is characterized in that: described salt pan evaporation concentration is to utilize solar thermal energy to carry out the evaporation concentration of mother liquid of boric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020275 CN1289394C (en) | 2005-01-26 | 2005-01-26 | Prepn process of recovering boric acid and magnesium sulfate from evaporation concentrated boric acid mother liquor in salt field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510020275 CN1289394C (en) | 2005-01-26 | 2005-01-26 | Prepn process of recovering boric acid and magnesium sulfate from evaporation concentrated boric acid mother liquor in salt field |
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| CN1673079A CN1673079A (en) | 2005-09-28 |
| CN1289394C true CN1289394C (en) | 2006-12-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708487B (en) * | 2013-12-25 | 2015-09-02 | 河北工业大学 | The technique of boric acid and magnesium sulfate is reclaimed from mother liquid of boric acid |
| CN109678167B (en) * | 2019-03-05 | 2023-01-10 | 青海利亚达化工有限公司 | Method for producing boric acid from lithium extraction boron-containing waste liquid |
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Effective date of registration: 20220727 Address after: 810000 Ganhetan Industrial Zone, Huangzhong District, Xining City, Qinghai Province Patentee after: Qinghai liyada Chemical Co.,Ltd. Address before: 5, 810008 building, 13 Xinning Road, Qinghai, Xining, China Patentee before: Li Hongling |