CN1248549A - Process for preparing high-quality potassium-containing products by salt-field method - Google Patents
Process for preparing high-quality potassium-containing products by salt-field method Download PDFInfo
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- CN1248549A CN1248549A CN 99121105 CN99121105A CN1248549A CN 1248549 A CN1248549 A CN 1248549A CN 99121105 CN99121105 CN 99121105 CN 99121105 A CN99121105 A CN 99121105A CN 1248549 A CN1248549 A CN 1248549A
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- potassium
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- bittern
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Abstract
The present invention relates to a technological process for extracting high-quality salt-field potassium-contained product by utilizing salt-field bittern solarization process. Said technological process is characterized by that in daytime, when the temperature is high, the bittern for extracting potassium is introduced into sodium pool to make bitten solarization, evaporation and dehydration, and separate out the salt minerals of sodium chloride, etc., and in night, before the temperature is lowered, the bittern is introduced into potassium pool to lower the temperature and separate out potassium salt, and this operation can be repeated several times,and when the potassium ion content in the bittern is less than 2/1000, the bittern is used as used bittern for other purpose. As compared with existent technological process, KCl content of salt-field potassium-contained product is high, can be up to about 52%, and its production cost is low.
Description
The invention belongs to the salt industry chemical technology field, relate in particular to a kind of salt pan solarization fontanel method of utilizing and produce the technology that the high-quality salt pan contains the potassium product.
At present to containing the extraction of potassium in the potassium fontanel water, the methods that adopt the salt pan evaporation more, potassium is separated out with other salt one syncrystallization with the form of sylvite or potassium double salt, become a kind of sylvite real estate product that contain, but because the potassium content that produces in the product of salt pan of its processing method is lower, and other impurity salt content is higher relatively, makes subsequent technique that this salt pan product further produces potassium product complexity more, the production cost height, potassium product single yield is lower.
The objective of the invention is above-mentioned defective at existing technology existence, design a kind of new salt field process, make it can improve the salt pan greatly and contain potassium content in the potassium product, reduce other impurity salt content, the subsequent machining technology that makes this salt pan contain the potassium product obtains simplifying, reduced production cost, improved quality product, good economic and social benefit has been arranged.
Technical scheme of the present invention is: will carry when temperature is high by day in the potassium fontanel water importing sodium pond and shine fontanel, moisture content is removed in evaporation, and solid such as precipitated sodium chloride, before night, temperature reduced, again this fontanel water is imported the potassium pond, sylvite is separated out in cooling, evaporate solids such as moisture content precipitated sodium chloride repeatedly daytime with this, night, sylvite was separated out in cooling, when treating that potassium content is lower than 2/1000ths (weight ratios) in the fontanel water, this fontanel is used it for anything else as old fontanel row, solid phase prod in the potassium pond is that the salt pan contains the potassium product, and solid phase prod is the sodium-chlor work in-process in the sodium pond.Adopt this explained hereafter to go out the salt pan and contain that KCE content can reach about 52% in the potassium product, other impurity salt content significantly reduces, and the salt pan that existing processing method is produced contains that KCE content only is 20%--40% in the potassium product, so this technology has good practicability and creativeness.Of the present inventionly carry the fontanel water that is used to extract sylvite that potassium fontanel water is chloride type or sulfate type.The sodium pond is main precipitated sodium chloride solid salt pond, and for evaporate moisture content as far as possible, its area can increase.The potassium pond is for mainly separating out the salt pond of sylvite (as Repone K, carnallite, vitriolate of tartar etc.) by cooling, it does not evaporate moisture content, and its area can dwindle, and only increases the fontanel water depth and gets final product.Fontanel water imports sodium pond or potassium pond, can adopt the fontanel water pump to realize.The theoretical basis of technology of the present invention is, the solubility with temperature of sylvite rises and rolls up, descend and reduce in a large number with temperature, and temperature realizes the less principle of solubleness influence of sodium salt (mainly referring to sodium-chlor).Through area, our province Qaidam is added up summer and autumn, its day and night temperature can reach 25--40 ℃.We are by the N of 0 ℃ and 25 ℃
a +, K
+/ Cl-) OH
2Altogether saturated fontanel water map analysis of ternary system, fontanel water are when reducing by 0 ℃ for 25 ℃, and 34% the KCl of having an appointment separates out in fontanel water, and NaCl is unsaturated on the contrary, does not also have crystal certainly to separate out, and this is just for the invention provides solid theory and implementation condition.This technology also is applicable to produces high-quality saltcake and epsom salt production in the sulfate type fontanel water.
The present invention and existing technology are relatively, about then the salt pan contains potassium content in the potassium product and doubles, reduced impurity salt content significantly, simplified the following process skill that the salt pan contains the potassium product greatly, though increased the current consumption of fontanel water pump early stage, the overall accounting still reduced production cost significantly, improved quality product, and significant social and economic benefit are arranged.
Embodiment one: adopt low Mg
2+Low SO4
2-The sulfuric acid salt lake carry potassium fontanel water, summer by day temperature at 30 ℃, the direct projection temperature is to carry potassium fontanel water under 40 ℃ to evaporate in the sodium pond and remove elutriation and go out fixed bodies such as sodium-chlor, during at 18 in afternoon this mother liquor imported in sodium pond cooling and separate out sylvite, about 7 of second day mornings once more this mother liquor is imported the evaporation of sodium pond and dewaters, precipitated sodium chloride, at 18 in afternoon will this female import to lower the temperature in potassium pond separate out sylvite, first quarter moon so repeatedly, K in its fontanel water
+Content is lower than at 2/1000ths o'clock then drains mother liquor as old fontanel, KCl content reaches 52%, 20% and 10% in gained sylvite, carnallite, the potassium mixed salt product.
Embodiment two: carrying potassium fontanel water is Cha Er sweat potash fertilizer plant flotation tailings mother liquor, its KCl content about about 5%, adopt above-mentioned technology in the fall, make that KCl content reaches 49% and 17% respectively in sylvite ore deposit and the carnallite, and common method makes its KCl content of carnallite ore deposit still about 17%.
Claims (1)
1, a kind of preparing high-quality potassium-containing products by salt-field method technology, it is characterized in that to carry when temperature is high by day in the potassium fontanel water importing sodium pond and shine fontanel, moisture content and precipitated sodium chloride solid are removed in evaporation, when night, temperature reduced, again this fontanel water is imported the potassium pond, sylvite is separated out in cooling, with this repeated multiple times, evaporate solids such as moisture content precipitated sodium chloride daytime, night, sylvite was separated out in cooling, treat that potassium content reaches at 2/1000ths o'clock in the fontanel water, fontanel is used it for anything else as old fontanel row, and the solid phase prod in the potassium pond is that the salt pan contains the potassium product, and solid phase prod is the sodium-chlor work in-process in the sodium pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99121105A CN1097557C (en) | 1999-09-24 | 1999-09-24 | Process for preparing high-quality potassium-containing products by salt-field method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99121105A CN1097557C (en) | 1999-09-24 | 1999-09-24 | Process for preparing high-quality potassium-containing products by salt-field method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1248549A true CN1248549A (en) | 2000-03-29 |
| CN1097557C CN1097557C (en) | 2003-01-01 |
Family
ID=5281793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99121105A Expired - Fee Related CN1097557C (en) | 1999-09-24 | 1999-09-24 | Process for preparing high-quality potassium-containing products by salt-field method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1097557C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7014832B2 (en) * | 2004-03-30 | 2006-03-21 | Council Of Scientific And Industrial Research | Simultaneous recovery of potassium chloride and KCL enriched edible salt |
| CN108217693A (en) * | 2017-12-27 | 2018-06-29 | 地矿集团格尔木盐湖资源开发有限公司 | A kind of salt pan technology using temperature difference separation component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD244539A1 (en) * | 1985-12-20 | 1987-04-08 | Kali Veb K | METHOD OF OBTAINING VALUE FROM BITTERN |
-
1999
- 1999-09-24 CN CN99121105A patent/CN1097557C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7014832B2 (en) * | 2004-03-30 | 2006-03-21 | Council Of Scientific And Industrial Research | Simultaneous recovery of potassium chloride and KCL enriched edible salt |
| CN108217693A (en) * | 2017-12-27 | 2018-06-29 | 地矿集团格尔木盐湖资源开发有限公司 | A kind of salt pan technology using temperature difference separation component |
| CN108217693B (en) * | 2017-12-27 | 2021-03-23 | 地矿集团格尔木盐湖资源开发有限公司 | Salt field technology for separating components by using temperature difference |
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| Publication number | Publication date |
|---|---|
| CN1097557C (en) | 2003-01-01 |
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