CN103112908A - Method for treating magnesium-sulfate-containing wastewater in hydrometallurgy - Google Patents
Method for treating magnesium-sulfate-containing wastewater in hydrometallurgy Download PDFInfo
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- CN103112908A CN103112908A CN2013100514458A CN201310051445A CN103112908A CN 103112908 A CN103112908 A CN 103112908A CN 2013100514458 A CN2013100514458 A CN 2013100514458A CN 201310051445 A CN201310051445 A CN 201310051445A CN 103112908 A CN103112908 A CN 103112908A
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- magnesium sulfate
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- hydrometallurgy
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Abstract
The invention belongs to the technical field of a sulfuric acid pickling technique for extracting nickel in ores in hydrometallurgy, and particularly relates to a method for treating magnesium-sulfate-containing wastewater in hydrometallurgy. The method is characterized by comprising the following steps: adding magnesium sulfate monohydrate into hydrometallurgical magnesium-sulfate-containing wastewater, and stirring to gradually increase the content of magnesium sulfate in the wastewater, wherein the wastewater is absorbed to dryness after sufficiently mixing to finally obtaining a solid mainly composed of magnesium sulfate heptahydrate; and drying the solid containing magnesium sulfate heptahydrate to remove excessive water, thereby obtaining the product containing magnesium sulfate heptahydrate. The invention can ensure the production continuity, greatly enhances the production operation efficiency, and lowers the labor intensity as well as the energy consumption and production cost; calcium, magnesium and other microelements contained in the wastewater completely enter the solid phase, so that the components in the fertilizer are more balanced and comprehensive; and the magnesium sulfate in the wastewater is prepared into the magnesium sulfate product fertilizer, thereby implementing zero discharge of the magnesium-containing wastewater.
Description
One, technical field: the invention belongs to the technical field of extracting nickel in ore in hydrometallurgy with vitriol lixiviation technique, particularly the treatment process of magnesium sulfate containing waste water in a kind of hydrometallurgy.
Two, background technology: existing domestic employing is take red soil nickel ore as raw material, with the nickel in the method extraction ore of vitriol lixiviation, it can produce a large amount of waste water under this kind technique, contain after measured the elements such as a large amount of magnesium, calcium, sulfate radical in waste water, direct qualified discharge at all, and then affected being widely used of the method.These contain the waste water of magnesium, thereby the general vacuum evaporation that adopts obtains sal epsom at present, but owing to containing the impurity such as a large amount of calcium, magnesium in waste water, causes the equipment scalings such as crystallizer, material conveying pipe, interchanger serious, blocking pipeline even, causing producing can not be continuous.In the middle of production process, must remove easy fouling goods and materials in pipeline and equipment in the mode of artificial removing, thus guarantee production.This kind processed the mode of waste water, and operating efficiency is low, continuous production is poor, staff's execute-in-place labour intensity large, energy consumption is higher.
Three, summary of the invention:
The objective of the invention is for above shortcomings in prior art, and the treatment process of magnesium sulfate containing waste water in a kind of hydrometallurgy of research and design, in this hydrometallurgy, the advantage of the treatment process of magnesium sulfate containing waste water is: the continuity that can guarantee production; Greatly improved production operation efficiency and reduced labour intensity, also having reduced energy consumption and production cost; In waste water, the trace elements such as contained calcium, magnesium all enter solid phase, jointly separate out with sal epsom, and as trace element fertilizer, make in fertilizer composition more balanced comprehensively; Sal epsom in waste water is made sal epsom fertilizer, thereby realizes containing the zero release of magnesium waste water.
Technical scheme is: in this hydrometallurgy, the technical characterictic of the treatment process of magnesium sulfate containing waste water is, add magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the product of magnesium sulfate heptahydrate.In order to improve value-added content of product, also the magnesium sulfate heptahydrate product that obtains can be sent in existing ripe dehydration equipment, and then can obtain magnesium sulfate monohydrate and sulfate dihydrate magnesium, four water magnesium sulfates, six water magnesium sulfate multiple products.Contain various trace elements in the resulting magnesium sulfate heptahydrate product of the inventive method and other sal epsom product, it uses but also can be used as other industrial chemicals mainly as Fertilizer application.
Method of the present invention makes the various trace elements such as calcium contained in waste water, magnesium, sodium, potassium, boron, lithium all enter solid phase, jointly separate out with sal epsom, and use as trace element fertilizer, make in fertilizer composition more balanced comprehensively, make again the sal epsom in waste water make sal epsom fertilizer, turn waste into wealth, thereby realized containing the zero release of magnesium waste water; The method can also guarantee the continuity of producing, and has greatly improved production operation efficiency and has reduced the producer's labour intensity, also reduces energy consumption and production cost, and its economic benefit and social benefit are very remarkable.
Four, embodiment:
Embodiment 1: add magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, and waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the solid phase prod of magnesium sulfate heptahydrate.
Embodiment 2: add magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, and waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the product of magnesium sulfate heptahydrate; In order to improve value-added content of product, then the magnesium sulfate heptahydrate product that obtains is sent in existing ripe dehydration equipment, and then can be obtained the mixing prod of four water magnesium sulfates and six water magnesium sulfates.
Embodiment 3: add magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, and waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the product of magnesium sulfate heptahydrate; In order to improve value-added content of product, also the magnesium sulfate heptahydrate product that obtains can be sent in existing ripe dehydration equipment, and then can obtain the mixing prod of magnesium sulfate monohydrate and sulfate dihydrate magnesium etc.
Embodiment 4: add magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, and waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the product of magnesium sulfate heptahydrate; The magnesium sulfate heptahydrate product that obtains is sent in existing ripe dehydration equipment, and then can be obtained the product of magnesium sulfate monohydrate.
Claims (2)
1. the treatment process of magnesium sulfate containing waste water in a hydrometallurgy, it is characterized in that adding magnesium sulfate monohydrate in the magnesium sulfate containing waste water of hydrometallurgy, by mixing, the content of the sal epsom in waste water is improved gradually, waste water is blotted after carrying out abundant mix, till obtaining at last solid that main component is magnesium sulfate heptahydrate; The solid that will contain again magnesium sulfate heptahydrate carries out drying, removes excessive moisture, thereby obtains containing the product of magnesium sulfate heptahydrate.
2. the treatment process of magnesium sulfate containing waste water in hydrometallurgy according to claim 1, it is characterized in that the magnesium sulfate heptahydrate product that obtains is sent in existing ripe dehydration equipment, and then can obtain magnesium sulfate monohydrate and sulfate dihydrate magnesium, four water magnesium sulfates, six water magnesium sulfate multiple products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013100514458A CN103112908A (en) | 2013-01-26 | 2013-01-26 | Method for treating magnesium-sulfate-containing wastewater in hydrometallurgy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100514458A CN103112908A (en) | 2013-01-26 | 2013-01-26 | Method for treating magnesium-sulfate-containing wastewater in hydrometallurgy |
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| CN103112908A true CN103112908A (en) | 2013-05-22 |
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| CN2013100514458A Pending CN103112908A (en) | 2013-01-26 | 2013-01-26 | Method for treating magnesium-sulfate-containing wastewater in hydrometallurgy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395867A (en) * | 2016-08-30 | 2017-02-15 | 山西大学 | Method used for extracting high purity magnesium sulfate hexahydrate from brine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110839A1 (en) * | 1982-11-25 | 1984-06-13 | Luigi Conti Vecchi S.p.A. | Method of preparing magnesium sulphate from mixtures of salts |
| CN1125212A (en) * | 1994-11-09 | 1996-06-26 | 郑州工学院 | Carbon ammonium physical property improving method |
| CN101360842A (en) * | 2005-12-22 | 2009-02-04 | Bhp比利通Ssm开发有限公司 | Recovery of solid magnesium sulfate hydrate |
| CN102745726A (en) * | 2012-04-06 | 2012-10-24 | 北京世能中晶能源科技有限公司 | Method for producing magnesium sulfate heptahydrate by using desulfurization wastewater |
-
2013
- 2013-01-26 CN CN2013100514458A patent/CN103112908A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110839A1 (en) * | 1982-11-25 | 1984-06-13 | Luigi Conti Vecchi S.p.A. | Method of preparing magnesium sulphate from mixtures of salts |
| CN1125212A (en) * | 1994-11-09 | 1996-06-26 | 郑州工学院 | Carbon ammonium physical property improving method |
| CN101360842A (en) * | 2005-12-22 | 2009-02-04 | Bhp比利通Ssm开发有限公司 | Recovery of solid magnesium sulfate hydrate |
| CN102745726A (en) * | 2012-04-06 | 2012-10-24 | 北京世能中晶能源科技有限公司 | Method for producing magnesium sulfate heptahydrate by using desulfurization wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 王向荣: "《化肥生产的相图分析》", 31 May 1977, 石油化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395867A (en) * | 2016-08-30 | 2017-02-15 | 山西大学 | Method used for extracting high purity magnesium sulfate hexahydrate from brine |
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Application publication date: 20130522 |