CN104261431B - In a kind of KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid - Google Patents
In a kind of KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid Download PDFInfo
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- CN104261431B CN104261431B CN201410456820.1A CN201410456820A CN104261431B CN 104261431 B CN104261431 B CN 104261431B CN 201410456820 A CN201410456820 A CN 201410456820A CN 104261431 B CN104261431 B CN 104261431B
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Abstract
The invention discloses carnallitite in a kind of KCl production and get rid of the recoverying and utilizing method of rear liquid, is by carnallitite settling vessel sedimentation gained carnallitite after whizzer is separated, and solid, by ground trough washery, is delivered to the fast crystallizer of control and decomposes; Carnallitite gets rid of rear liquid liquid bath buffering after getting rid of, be delivered to and get rid of in rear liquid settling vessel, get rid of rear liquid settling vessel sedimentation gained salt slurry and be delivered to high temp. salt burden process for industrial refined salt, magnesium sulfate monohydrate production, the overflow clear liquid getting rid of rear liquid settling vessel and carnallitite settling vessel upper strata is delivered to the production that industrial bromine production process carries out industrial bromine.Invention increases the quality of carnallitite product in KCl production, sodium chloride content in carnallitite product is reduced, decrease and decomposing the water loss in washing procedure, that improves Repone K washes yield, avoid Repone K in the loss of washing process, improve the quality of Potassium Chloride Product simultaneously, achieve the target of Resource regeneration.
Description
Affiliated field:
The present invention relates to a kind of production method of Repone K, be specifically related to the recoverying and utilizing method that carnallitite in KCl production gets rid of rear liquid.
Background technology:
Carnallitite, its molecular formula is KClMgCl
26H
2o, molecular weight is 277.87.Colourless rhombic system particulate state or compact mass thing aggregate output, crystal is rare.Relative density 1.6.It is of many uses, for the manufacture of the raw mineral materials of potash fertilizer and extraction of metal magnesium.The main refining agent being used as extracting metals magnesium, produces the protective material of aluminum magnesium alloy.Also be used as the welding compound of aluminum magnesium alloy, the fusing assistant of metal, produce the raw material of sylvite and magnesium salts.
At present, both at home and abroad from containing extracting Repone K potassium bittern, no matter be cool technology flotation or salt-pan carnallite dissolving-recrystallization or reverse flotation cold junction crystallization, be all first make carnallitite, then processing preparing potassium chloride is carried out to carnallitite.
Most of salinization factory adopts producing potassium chloride by halogen conversion method, and in production process, carnallitite is important intermediates, stablizes the quality of carnallitite, is the key link of whole production.If NaCl and MgSO in carnallitite
4content is higher, is because termination boiling point is on the low side, during holding temperature too high or solid-liquid separation sedimentation unclear caused by.If the MgCl in carnallitite
2content is higher, causes because cooling temperature is too low.
The carnallitite main component that production obtains is: NaCl:5-8%; MgCl
2: 30-32%; MgSO
4: 0.8-1.2%; KCl:18-22%; H
2o:34-42%.
The size of sodium chloride content in carnallitite, washes yield to what decompose bath water amount and Repone K, all has larger impact.The quality of carnallitite, often represents with NaCl content, if other components unchanged, in carnallitite, NaCl content often ± 1%, decomposes bath water ± 4%, KCl Washing ratio
as can be seen here, the content reducing NaCl in carnallitite should be managed as far as possible, could reduce decomposition bath water amount, wash yield with what improve KCl, in KCl production, reach the effect of Resource regeneration.
Existing carnallitite gets rid of rear liquid recoverying and utilizing method, and by carnallitite settling vessel sedimentation gained carnallitite after centrifuge is separated, the solid of separation enters geosyncline agitator treating, then is decomposed to controlling fast crystallizer by pump delivery.Carnallitite is got rid of rear liquid and is cushioned by geosyncline, returns carnallitite settling vessel by pump delivery, mixes with carnallitite slurry, recovery part carnallitite, and the overflow clear liquid of carnallitite settling vessel is delivered to industrial bromine production process.Because of carnallitite, to get rid of sodium chloride content in rear liquid higher, and long-term circulation sedimentation must cause the rising of NaCl content in carnallitite, affects carnallitite quality product, and then affects the production of Potassium Chloride Product.
Summary of the invention:
Instant invention overcomes the deficiencies in the prior art, provide carnallitite in a kind of KCl production and get rid of the recoverying and utilizing method of rear liquid, while efficient recovery carnallitite gets rid of rear liquid, improve the quality of carnallitite.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
In KCl production, carnallitite gets rid of a recoverying and utilizing method for rear liquid, is to be separated through whizzer by carnallitite settling vessel sedimentation gained carnallitite, and the solid after separation enters carnallitite geosyncline and carries out agitator treating, is then delivered to the fast crystallizer of control and decomposes; Carnallitite gets rid of rear liquid liquid bath buffering after getting rid of, be delivered to and get rid of in rear liquid settling vessel, get rid of rear liquid settling vessel sedimentation gained salt slurry and be delivered to high temp. salt burden process for industrial refined salt, magnesium sulfate monohydrate production, the overflow clear liquid getting rid of rear liquid settling vessel and carnallitite settling vessel upper strata is delivered to the production that industrial bromine production process carries out industrial bromine.
According to above technical scheme, described whizzer is horizontal conical basket centrifuge.Described get rid of rear liquid settling vessel be continous way rake collection settling vessel.
The advantage that the present invention has and beneficial effect are:
(1) invention increases the quality of carnallitite product in KCl production, sodium chloride content in carnallitite product is reduced, decrease and decomposing the water loss in washing procedure, what improve Repone K washes yield, avoid Repone K in the loss of washing process, improve the quality of Potassium Chloride Product simultaneously, achieve the target of Resource regeneration.
(2) facility investment required for the present invention is less, and low to original system transformation degree, technical process is simple, simple to operation, is easy to realization of industrialization.
Accompanying drawing illustrates:
Fig. 1: carnallitite of the present invention gets rid of the recoverying and utilizing method process flow sheet of rear liquid;
Fig. 2: in original technology, carnallitite gets rid of the recoverying and utilizing method process flow sheet of rear liquid.
In figure: 1, carnallitite settling vessel; 2, carnallitite dashpot; 3, whizzer; 4, carnallitite geosyncline; 5, rear liquid bath is got rid of; 6, rear liquid settling vessel is got rid of; 7, salt slurry dashpot.
Embodiment:
For summary of the invention of the present invention, Characteristic can be understood further, hereby enumerate following examples, and coordinate accompanying drawing to be described in detail as follows:
In KCl production, carnallitite gets rid of a recoverying and utilizing method for rear liquid, specifically operates according to the following steps:
Bittern is after converting halogen, evaporation, heat preservation settlement operation, and overflow clear liquor enters crystallisation by cooling operation, and obtained carnallitite slurry, carries out sedimentation by carnallitite slurry transferring to carnallitite settling vessel.Carnallitite settling vessel sedimentation gained carnallitite cushions through carnallitite dashpot, be delivered to whizzer to be separated, after solid after separation enters carnallitite geosyncline agitator treating, be delivered to the fast crystallizer of control and decompose, then enter the operation manufacture Potassium Chloride Products such as washing, dehydration; Carnallitite gets rid of rear liquid liquid bath buffering after getting rid of, be delivered to and get rid of in rear liquid settling vessel, get rid of rear liquid settling vessel sedimentation gained salt slurry through salt slurry dashpot buffering, be delivered to high temp. salt burden process to produce for industrial refined salt, magnesium sulfate monohydrate, the overflow clear liquid getting rid of rear liquid settling vessel and carnallitite settling vessel upper strata is delivered to the production that industrial bromine production process carries out industrial bromine.
Following table is the experimental data in operating mode situation, and table 1 is the content situation of each component in carnallitite product in original technology and contrast situation of the present invention, and by contrast, in carnallitite product of the present invention, sodium-chlor average content reduces by 1.85 percentage points.Table 2 is in original technology and contrast situation of the present invention, Potassium Chloride Product production process ton product water loss contrast table, and drawn by contrast, ton Repone K water loss of the present invention decreases 5.6 tons.Therefore, by the enforcement of present invention process method, reduce the content of the sodium-chlor in carnallitite, decrease the water loss of ton Potassium Chloride Product, Resource regeneration successful.
Table 1: each component concentration table (original technology and the present invention contrast) in carnallitite product
Table 2: Potassium Chloride Product production process ton product water loss contrast table (original technology and the present invention contrast)
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (3)
1. in a KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid, it is characterized in that, be separated through whizzer by carnallitite settling vessel sedimentation gained carnallitite, the solid after separation enters carnallitite geosyncline and carries out agitator treating, is then delivered to the fast crystallizer of control and decomposes; Carnallitite gets rid of rear liquid liquid bath buffering after getting rid of, be delivered to and get rid of in rear liquid settling vessel, get rid of rear liquid settling vessel sedimentation gained salt slurry and be delivered to high temp. salt burden process for industrial refined salt, magnesium sulfate monohydrate production, the overflow clear liquid getting rid of rear liquid settling vessel and carnallitite settling vessel upper strata is delivered to the production that industrial bromine production process carries out industrial bromine.
2. in a kind of KCl production according to claim 1, carnallitite gets rid of the recoverying and utilizing method of rear liquid, it is characterized in that, described whizzer is horizontal conical basket centrifuge.
3. in a kind of KCl production according to claim 1, carnallitite gets rid of the recoverying and utilizing method of rear liquid, it is characterized in that, described in get rid of rear liquid settling vessel be continous way rake collection settling vessel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456820.1A CN104261431B (en) | 2014-09-10 | 2014-09-10 | In a kind of KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid |
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|---|---|---|---|
| CN201410456820.1A CN104261431B (en) | 2014-09-10 | 2014-09-10 | In a kind of KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid |
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| CN104261431A CN104261431A (en) | 2015-01-07 |
| CN104261431B true CN104261431B (en) | 2016-03-02 |
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| CN201410456820.1A Expired - Fee Related CN104261431B (en) | 2014-09-10 | 2014-09-10 | In a kind of KCl production, carnallitite gets rid of the recoverying and utilizing method of rear liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107803047A (en) * | 2017-12-12 | 2018-03-16 | 天津大学 | A kind of continuous decomposition crystallizer for carnallite thermal decomposition preparing potassium chloride |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275531A (en) * | 2000-06-22 | 2000-12-06 | 宋侑霖 | Method for directly obtaining low-sodium fine carnallitite |
| CN1429768A (en) * | 2001-12-31 | 2003-07-16 | 中盐制盐工程技术研究院 | Improved process of producing potassium chloride by halogen conversion method |
| CN101462743A (en) * | 2007-12-17 | 2009-06-24 | 贵阳铝镁设计研究院 | Method for preparing low sodium low potassium content carnallite |
| CN101643223A (en) * | 2009-08-24 | 2010-02-10 | 天津长芦海晶集团有限公司 | Preparation method of potassium chloride and byproducts thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304292C (en) * | 2002-01-31 | 2007-03-14 | 科学和工业研究委员会 | Process for recovering low sodium salt from bittern |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275531A (en) * | 2000-06-22 | 2000-12-06 | 宋侑霖 | Method for directly obtaining low-sodium fine carnallitite |
| CN1429768A (en) * | 2001-12-31 | 2003-07-16 | 中盐制盐工程技术研究院 | Improved process of producing potassium chloride by halogen conversion method |
| CN101462743A (en) * | 2007-12-17 | 2009-06-24 | 贵阳铝镁设计研究院 | Method for preparing low sodium low potassium content carnallite |
| CN101643223A (en) * | 2009-08-24 | 2010-02-10 | 天津长芦海晶集团有限公司 | Preparation method of potassium chloride and byproducts thereof |
Non-Patent Citations (1)
| Title |
|---|
| 光卤石控速结晶制取氯化钾工艺探讨;钱礼华;《海湖盐与化工》;20011231;第30卷(第5期);22-23 * |
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