CN1587048A - Process for preparing crystalline potassium chloride by raw bittern salt field method - Google Patents
Process for preparing crystalline potassium chloride by raw bittern salt field method Download PDFInfo
- Publication number
- CN1587048A CN1587048A CN 200410073692 CN200410073692A CN1587048A CN 1587048 A CN1587048 A CN 1587048A CN 200410073692 CN200410073692 CN 200410073692 CN 200410073692 A CN200410073692 A CN 200410073692A CN 1587048 A CN1587048 A CN 1587048A
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- repone
- carnallitite
- potassium chloride
- washing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Fertilizers (AREA)
Abstract
Potassium chloride is important potash fertilizer and important industrial material and the present invention provides one kind of high quality crystallized potassium chloride producing process. The present invention is a great area salt field solarization process for producing potassium chloride directly. The potassium chloride producing process includes compounding mother solution with bittern, solarization in salt field, washing the carnallite with compounded solution, dissolving with fresh water to saturation, solarization in potassium chloride crystallizing pond to separate potassium chloride crystal, washing and drying. Meanwhile, sodium chloride and magnesium chloride may be also obtained.
Description
Technical field
The present invention relates to the alkali metal halide technical field, specifically a kind of preparation method of Repone K.
Background technology
Repone K is the principal item of agriculture potash fertilizer, also is the industrial main raw material of producing other sylvite.The Repone K manufacturing enterprise of China 90% continues to use production methods such as traditional positive and negative " flotation " and thermosol at present, all be that raw material " carnallitite " is passed through forklift entrucking, automobile roping to the workshop stock yard from the salt pan, by the dozer material loading, links such as process charging machine, rotary conveyor, disassembler, flotation machine, whizzer, dryer are packed and are dispatched from the factory again.More than the method for Sheng Chaning all is to found the factory that investment is big, cost is high, and machine is numerous, and process is heavy long, and controlling unit is many, and the rate of recovery is low, all needs chemical agent to add and coal-fired consumption.And link control is bad arbitrarily, and low-grade Repone K product all will emerge in an endless stream.The E halogen F halogen that also has part enterprise to adopt is converted halogen and is gone out carnallitite in converting the halogen device, carnallitite secondary washing drying and packaging is dispatched from the factory again; Adding halogen method needs a large amount of E halogen and F halogen, and the investment of founding the factory is big, and the rate of recovery is low.
Summary of the invention
The present invention is the shortcoming that overcomes in the prior art, and proposing a kind of is the method that the high saltpan method free from environmental pollution of raw material, the rate of recovery is produced Repone K with former halogen.
Concrete technical scheme of the present invention is:
A kind of method of process for preparing crystalline potassium chloride by raw bittern salt field may further comprise the steps:
(1) former bittern shines in advance: former bittern is shone in advance pre-the solarization in the pond, shine and do not float to the bittern surface that salt efflorescence, concentration are between the 31Be to 32Be, KCl 〉=2%, NaCl≤0.8%, MgCl
2〉=26%, remove solid impurity, obtain mother liquor 1;
(2) shine the system carnallitite: mother liquor 1 is continued to shine, and the liquid evaporation condensing crystal is separated out " carnallitite ", when strength of fluid shines to 34～35Be, separates obtaining carnallitite and mother liquor 2;
(3) configuration of washing soln: get a part of mother liquor 2 usefulness fresh water and be mixed with the washing soln that concentration is 31～32Be;
(4) washing carnallitite:, obtain thick Repone K and mother liquor 3 with the carnallitite that washing soln thorough washing step (2) obtains;
(5) thick Repone K dissolving and crystallization: the thick Repone K fresh water dissolution that step (4) is obtained is a saturated potassium chloride solution 2, and solution is tedded in clarification, crystal Repone K is separated out in crystallization, is called smart Repone K 1, when strength of solution is shone to 27～27.5Be, isolate smart Repone K 1, and obtain mother liquor 4;
(6) refining: remove mother liquor with fresh water detergent Repone K 1, obtain smart Repone K 2 and mother liquor 6, drying obtains the crystalline potassium chloride product again.
Described mother liquor 3 can merge with mother liquor 1 or ted according to step (2) separately, obtains carnallitite.
Described mother liquor 4 continues to ted, and when shining to 39～30Be, separates obtaining thick Repone K and mother liquor 5.
Described mother liquor 5 can merge with mother liquor 1 or ted according to step (2) separately, obtains carnallitite.
Described mother liquor 6 can merge with solution 2 or ted according to step (5) separately, obtains smart Repone K 1.
Former bittern in the step (1) shines to Repone K when saturated, separate solid impurity or change the pond and continue to ted and make carnallitite.
Described carnallitite is directly used fresh water dissolution according to step (5) without the described washing process of step (4), teds, and separates obtaining smart Repone K 1.
Described thick Repone K directly makes smart Repone K 1 with the fresh water washing without the dissolving and the crystallization of step (5).
Described mother liquor 2 is evacuated to the other pond of tedding and teds to continuing, and obtains Magnesium dichloride hexahydrate.
The employed various ponds of tedding among the present invention, make with PVC (polyvinyl chloride) plastic-coated fabric, method of construction is: launch by the pond design area with PVC (polyvinyl chloride) plastic-coated fabric heat seal or with the PVC plastic-coated fabric, between every limit and the limit overlapped 2 centimetres, be that the alpha-cyanoacrylate fat caking agent of TYPE-W3 is coated with full lap seam with model again, after treating the alpha-cyanoacrylate fat caking agent curing of TYPE-W3, seal fully with the lap seam of igelite caking agent again the bonding mistake of alpha-cyanoacrylate fat caking agent of TYPE-W3.Behind the design area of bonding intact pond, simultaneously be folded into the designed dykes and dams height dimension in pond and add 0.2 meter in addition all around to the center, pond, then outside around build dykes and dams by pond height heap, at last with unnecessary 0.2 meter dig be placed on dykes and dams above, compress with weight, prevent wind.
Advantage of the present invention and effect:
It is raw material that the present invention adopts former bittern, can economize on resources.
Because what adopt is salt pan big area operation, concentrate so the low yield of the cost utmost point is big, and grade is even.And adopt various mother liquors to ted, reclaim, thereby rate of recovery height of the present invention.
The present invention adopts the pure natural resource and the energy, does not have to increase material and the environment pollute, does not produce any objectionable impurities simultaneously, thereby the present invention is the environmental protection method, and is free from environmental pollution.
Method of the present invention is directly shone system with the big area salt pan, has saved raw material transportation and Workshop Production link, has saved production cost virtually.
Method of the present invention simultaneously can co-producing sodium chloride and magnesium chloride product.
Description of drawings
Fig. 1 is the schema of the method for expression process for preparing crystalline potassium chloride by raw bittern salt field of the present invention.
Embodiment
Adopt the mode of specific embodiment further to explain the present invention below, but the present invention is not limited to these embodiment.
Embodiment 1
The concentration that takes by weighing 1240kg is that the KCE content of 29Be is 1.6% former halogen, shining concentration in advance is 31.5Be, obtain the solution 1 of 1103kg, continue again to ted that to obtain KCE content be 22% carnallitite 81kg, obtaining KCE content through washing again is 68% thick Repone K 19.1kg, teds through dissolving and obtains 93% crystalline potassium chloride 9.12kg.
Claims (9)
1. the method for a process for preparing crystalline potassium chloride by raw bittern salt field is characterized in that it may further comprise the steps:
(1) former bittern shines in advance: former bittern is shone in advance pre-the solarization in the pond, shine and do not float to the bittern surface that salt efflorescence, concentration are between the 31Be to 32Be, KCl 〉=2%, NaCl≤0.8%, MgCl
2〉=26%, remove solid impurity, obtain mother liquor 1;
(2) shine the system carnallitite: mother liquor 1 is continued to shine, and the liquid evaporation condensing crystal is separated out carnallitite, when strength of fluid shines to 34～35Be, separates obtaining carnallitite and mother liquor 2;
(3) configuration of washing soln: get a part of mother liquor 2 usefulness fresh water and be mixed with the washing soln that concentration is 31～32Be;
(4) washing carnallitite:, obtain thick Repone K and mother liquor 3 with the carnallitite that washing soln thorough washing step (2) obtains;
(5) thick Repone K dissolving and crystallization: the thick Repone K fresh water dissolution that step (4) is obtained is a saturated potassium chloride solution 2, and solution is tedded in clarification, crystal Repone K is separated out in crystallization, is called smart Repone K 1, when strength of solution is shone to 27～27.5Be, isolate smart Repone K 1, and obtain mother liquor 4;
(6) refining: remove mother liquor with fresh water detergent Repone K 1, obtain smart Repone K 2 and mother liquor 6, drying obtains the crystalline potassium chloride product again.
2. method according to claim 1 is characterized in that, described mother liquor 3 and mother liquor 1 merge or ted according to step (2) separately, obtain carnallitite.
3. method according to claim 1 is characterized in that, described mother liquor 4 continues to ted, and when shining to 39～30Be, separates obtaining thick Repone K and mother liquor 5.
4. method according to claim 3 is characterized in that, described mother liquor 5 and mother liquor 1 merge or ted according to step (2) separately, obtain carnallitite.
5. method according to claim 1 is characterized in that, described mother liquor 6 and solution 2 merge or teds according to step (5) separately, obtain smart Repone K 1.
6. method according to claim 1 is characterized in that, the former bittern in the step (1) shines to Repone K when saturated, separate solid impurity or change the pond and continue to ted and make carnallitite.
7. method according to claim 1 is characterized in that, described carnallitite is directly used fresh water dissolution according to step (5) without the described washing process of step (4), teds, and separates obtaining smart Repone K 1.
8. method according to claim 1 is characterized in that, described thick Repone K directly makes smart Repone K 1 with the fresh water washing without the dissolving and the crystallization of step (5).
9. method according to claim 1 is characterized in that, described mother liquor 2 is evacuated to the other pond of tedding and teds to continuing, and obtains Magnesium dichloride hexahydrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073692 CN1274598C (en) | 2004-09-01 | 2004-09-01 | Process for preparing crystalline potassium chloride by raw bittern salt field method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073692 CN1274598C (en) | 2004-09-01 | 2004-09-01 | Process for preparing crystalline potassium chloride by raw bittern salt field method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587048A true CN1587048A (en) | 2005-03-02 |
| CN1274598C CN1274598C (en) | 2006-09-13 |
Family
ID=34604758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410073692 Expired - Fee Related CN1274598C (en) | 2004-09-01 | 2004-09-01 | Process for preparing crystalline potassium chloride by raw bittern salt field method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1274598C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402427C (en) * | 2005-06-01 | 2008-07-16 | 高崧耀 | Method for producing potassium chloride crystal through solarization on large area of brine pan |
| CN102923735A (en) * | 2012-09-28 | 2013-02-13 | 新疆昆金矿业有限责任公司 | Method for preparing potassium chloride through highland salt lake raw brine salt pan process |
| CN112441602A (en) * | 2019-08-28 | 2021-03-05 | 中蓝连海设计研究院有限公司 | Salt pan for recovering potassium salt at low cost and method for recovering potassium salt by adopting salt pan |
-
2004
- 2004-09-01 CN CN 200410073692 patent/CN1274598C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402427C (en) * | 2005-06-01 | 2008-07-16 | 高崧耀 | Method for producing potassium chloride crystal through solarization on large area of brine pan |
| CN102923735A (en) * | 2012-09-28 | 2013-02-13 | 新疆昆金矿业有限责任公司 | Method for preparing potassium chloride through highland salt lake raw brine salt pan process |
| CN112441602A (en) * | 2019-08-28 | 2021-03-05 | 中蓝连海设计研究院有限公司 | Salt pan for recovering potassium salt at low cost and method for recovering potassium salt by adopting salt pan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1274598C (en) | 2006-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532339B (en) | A kind of method that calcium sulfate crystal whiskers are prepared using low grade natural gypsum or gypsum mine | |
| CN103570043B (en) | Method for producing high-purity potassium chloride solution for preparation of potassium carbonate and co-producing low sodium salt | |
| CN101648725B (en) | Method for preparing industrial calcium chloride | |
| CN101654611B (en) | Method for manufacturing snowmelt agent by using shells | |
| CN103613695A (en) | Preparation method and application of low-carbon recyclable gel-solidified waste mud | |
| CN1618997A (en) | Method of combined extraction of magnesium and lithium in salt lake bittern | |
| CN102849744B (en) | Technology for producing sodium fluosilicate | |
| CN108862353B (en) | Process method for preparing and purifying calcium chloride by using chlor-alkali waste salt mud | |
| CN111115665A (en) | Method for recycling lithium-potassium-rich aluminum electrolyte | |
| CN1025727C (en) | Potassium chloride preparing by chloride type patassium brine | |
| CN1212271C (en) | Method for integrated production of magnesium sulfate, magnesium carbonate and magnesium hydroxide from magnesite | |
| MXPA00010125A (en) | Method of procucing potassium sulfate. | |
| CN101066770A (en) | Process of preparing potassium sulfate with potassium containing bittern of magnesium sulfate subtype | |
| CN1274598C (en) | Process for preparing crystalline potassium chloride by raw bittern salt field method | |
| CN102923735A (en) | Method for preparing potassium chloride through highland salt lake raw brine salt pan process | |
| CN1062252C (en) | Potash fertilizer producing method by using potassium-rock | |
| CN1274597C (en) | Recovery method for potassium chloride from waste tail liquid by carnallite flotation process | |
| CN1016865B (en) | Producing method of sodium carbonate | |
| CN101648708B (en) | Preparing method of high-purity carbon dioxide | |
| CN1772608A (en) | Process of producing sodium metasilicate pentahydrate with waste industrial silicone gel | |
| CN101318118A (en) | Method for recycling net glue in waste soft capsule | |
| CN1131639A (en) | Method for preparing potassium sulfate with sulfate type bittern | |
| CN1522961A (en) | Process for preparing calcined soda by trona containing abundant sodium bicarbonate | |
| CN101805004A (en) | Method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag | |
| CN1037319A (en) | The method of comprehensive utilization of urao |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |