CN107381601B - A kind of method of high boron carnallite production KCl - Google Patents
A kind of method of high boron carnallite production KCl Download PDFInfo
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- CN107381601B CN107381601B CN201710815235.XA CN201710815235A CN107381601B CN 107381601 B CN107381601 B CN 107381601B CN 201710815235 A CN201710815235 A CN 201710815235A CN 107381601 B CN107381601 B CN 107381601B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
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- C01—INORGANIC CHEMISTRY
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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Abstract
A kind of method of high boron carnallite production KCl, specifically includes that ore grinding；It is classified boron removal, using most boron compound in mud device removing ore pulp is simply divided, underflow is low boron carnallite；High boron mother liquid disposal divides mud device overflow mother liquor that flocculant flocculation is added, and after settling a period of time, supernatant liquor returns to blended size system；It decomposes, by low boron carnallite and water, washing mother liquor by certain mass than stirring certain time after mixing；Flotation, using one thick one it is single-minded sweep, selected chats and scavenger concentrate sequence return roughing closed circuit floatation process obtain KCl flotation concentrate；Concentrate washs drying.Present invention process process is simple, easy to operate, the main useful element K in raw ore+The rate of recovery is high, and resource utilization is high, is avoided that the wasting of resources, provides new thinking except boron produces KCl product for the carnallite of this type.
Description
Technical field
The present invention relates to the methods of carnallite production KCl a kind of, and in particular to one kind from high boron carnallite
Except harmful element particulate boron compound, except the method for utilizing decomposition-floatation process to produce KCl after boron.
Background technique
Carnallite, molecular formula are KClMgCl2·6H2O, be it is a kind of produce the common raw material of potassium chloride, there are two types of depositing
In form, one is the primary carnallites of self-assembling formation and brine salt pan to evaporate secondary carnallite obtained.In light halogen
Stone produces in the technique of potassium chloride, and cool technology-floatation process is technique more mature at present, and 90% or more carnallite is all adopted
KCl is produced with the technique.
There is the salt lake bittern of a large amount of potassium, boron symbiosis in China Qinghai-Tibet Platean, is being rich in K+While B2O3Content is also higher.
In the evaporation process of salt pan, K+Later period, that is, carnallite stage B is precipitated2O3With (the alkali formula antifungin calcification of alkali formula antifungin calcium compound
Closing object is the compound containing B2O3 such as boromagnesite and borax cementing superfine granulation of one kind being wrapped to form in the evaporation process of salt pan
Close object) form be precipitated, the compound fine size, most of exist in ore pulp with aerosol form, produces KCl to carnallite
Floatation process have an adverse effect, be in particular in the following aspects, first is that influence floating agent additive amount, superfine alkali
The presence of formula antifungin calcium compound particle causes the surface area of solid particle in ore pulp to increase, so as to cause floating agent
Consumption increases；Second is that the presence of alkali formula antifungin calcium compound particle can make flotation froth tacky, bubble mobility is reduced, most
Foam is caused to emit slot eventually；Third is that influencing the separating effect of KCl, causes the KCl concentrate grade floatingly selected low, qualification can not be produced
KCl product；Fourth is that the presence of particulate boron blocks filter paper filter cloth, the strainability of product is made to be deteriorated.It is such based on the above reasons
High boron carnallite production KCl becomes insoluble problem in professional domain.
High boron carnallite (B2O3 content >=1.5%) utilizes less at present, most of all discarded, is to the very big of resource
Waste.Current reported boron removal technique is substantially acid system except boron and floatation remove boron, and acid system is in flotation pulp except boron
Alkali formula antifungin calcium compound is dissolved in mother liquor by middle addition hydrochloric acid by acid, and the method can be such that mother liquor is acidified, and arrange to salt pan
After cause environmental pollution.CN104163440A discloses the method for earth's surface carnallite production KCl a kind of, wherein including a Duan Guang
Halogen stone pretreating process, primarily to the clay in removing carnallite.The patent removing process is complicated, long flow path, and operation is difficult
It spends larger, could need to effectively remove the clay in carnallite by two-stage desliming process.
Summary of the invention
The technical problem to be solved by the present invention is to provide the method for high boron carnallite production KCl a kind of, technique is simpler
Single, the potassium rate of recovery is higher.
The technical solution used to solve the technical problems of the present invention is that a kind of method of high boron carnallite production KCl, tool
Body the following steps are included:
(1) ore grinding: by high boron carnallite raw ore ore grinding；Keep carnallite and boron compound fully dispersed in ore pulp；
High boron carnallite raw ore B2O3Content >=1.5wt% influences the normal utilization of such carnallite.Ore grinding mass concentration
For 50-65%, ore grinding mother liquor is saturated mother liquor using potassium chloride, epsomite, the carnallite generated in the evaporation process of salt pan altogether.Ore grinding
Fineness is that -20 mesh account for 90wt% or more.
(2) size mixing dosing: with size mixing mother liquor for the high boron carnallite pulp density after step (1) ore grinding and adjust to 10~
15 wt %, while alkali metal phosphate is added, the ore pulp after must sizing mixing；
The mother liquor of sizing mixing is that carnallite is saturated mother liquor.The alkali metal phosphate is sodium tripolyphosphate, calgon
It is compounded by the mass ratio of 1:1-1.2.The alkali formula boron for functioning as dispersing agent to disperse in ore pulp of alkali metal phosphate is added
Sour magnesium calcium compound reduces it in the adsorption of carnallite mineral.The dosage of alkali metal phosphate is 40~60mg/L ore pulp,
The volume calculating benchmark of ore pulp is that the ore pulp after mother liquor of sizing mixing is sized mixing is added in this step herein.Alkali metal phosphate can be configured to
Solution is added.
(3) it is classified boron removal: the ore pulp after sizing mixing being pumped to desliming bucket and divides boron compound in mud device removing ore pulp, gained
Underflow is the low boron carnallite ore pulp of high concentration (concentration of ore pulp is high, but boron content is low)；Gained overflow is the height of low concentration
Boron mother liquor (concentration of ore pulp is low, but boron content is high).
Ore pulp i.e. feed slurry concentration after sizing mixing is 10~15wt%.The low boron carnallite pulp density of gained high concentration
For 60~70wt%；The high boron mother liquid concentration of gained low concentration is 4~8wt%.
(4) high boron mother liquid disposal: flocculant is added into the high boron mother liquor of step (3) gained and flocculates and settles, supernatant liquor
Return step (2) is sized mixing, and lower sediment is discharged into tailing pit.
The flocculant is polyacrylamide；Dosage is 2~5mg/L high boron mother liquor.
(5) it decomposes: by low boron carnallite ore pulp obtained by step (3) and water, washing mother liquor in mass ratio 1: 0.08~0.15:
0.10~0.18 mixing, is stirred at room temperature 40~60 minutes, and solid-liquid mixed ore pulp is obtained after decomposition；
The low boron carnallite is that step (3) are classified the resulting underflow of boron removal.
Further, in each step, washing mother liquor is produced by step (7).The purpose is to will be generated low in step (7)
The high potassium washing mother liquor of magnesium is converted into the low potassium decomposition nut liquid of high magnesium by step (5), recycles the K in mother liquor+, so as to improve a whole set of work
The K of skill+The rate of recovery.Further, whole set process, can K by mass percentage when the first round not having washing Recycling Mother Solution+
3.382%、Na+4.326%、Mg2+3.423%、Cl-16.23%、SO4 2-4.734%, the composition of Yu Weishui is prepared.
(6) flotation: be added in the solid-liquid mixed ore pulp obtained by the step (5) flotation collector using one thick one it is single-minded sweep, essence
The closed circuit floatation process for choosing mine and scavenger concentrate to return to roughing obtains KCl flotation concentrate.
The flotation collector is mixing-in fat amine, is lauryl amine, the preferred 1:4 of octadecylamine 1:3~5(in mass ratio) it is multiple
Match.Dosage is 80~120g/t solid-liquid mixed ore pulp.
(7) it washs drying: flotation concentrate obtained by step (6) and water in mass ratio 1: 0.10~0.15 is mixed, room temperature is stirred
20~40min is mixed, after filtering, dry solid phase is KCl product；Liquid phase is to wash mother liquor, and return step (5) decomposes low boron light
Halogen stone ore.
By above step, the KCl product for meeting national standard Grade A requirement can be obtained.
Present invention process aims to solve the problem that the technical problem using high boron carnallite raw ore production KCl, this method novelty
Alkali metal phosphate is added and disperses alkali formula antifungin calcium compound, only needs to remove by common desliming device desliming bucket after sizing mixing
Superfine alkali formula antifungin calcium compound particle solves the at high cost and problem of environmental pollution that existing acid adding removes boron technique.The present invention
Process flow is simple, easy to operate, the main useful element K in raw ore+The rate of recovery is high, and resource utilization is high, is avoided that resource wave
Take, provides new thinking except boron produces KCl product for the carnallite of this type.
Specific embodiment
Technical scheme is described further combined with specific embodiments below.Below with reference to embodiment to this hair
It is bright to be described further.It is high boron carnallite that the present invention, which implements used raw material, the high boron carnallite of Examples 1 to 3
Element composition is as shown in table 1:
Flotation collector used in various embodiments of the present invention be mixing-in fat amine compounding, use water be made into mass concentration for
2% solution uses；Chemical reagent used in other is obtained by routine business approach unless otherwise specified.
Embodiment 1
The present embodiment comprises the steps of:
(1) ore grinding: high boron carnallite raw ore and ore grinding mother liquor are put into ore grinding in ore mill, make carnallite and boron compound
It is fully dispersed in ore pulp.Ore milling concentration is 50%(mass percent), ore grinding mother liquor uses the chlorine generated in the evaporation process of salt pan
Change potassium, epsomite, carnallite and be saturated mother liquor altogether, grinding fineness is that -20 mesh account for 90wt% or more.
(2) it sizes mixing dosing: will be through the high boron carnallite ore pulp after step (1) ore grinding with mother liquor carnallite saturation mother liquor is sized mixing
Concentration is adjusted to 15wt%, and alkali metal phosphate, the ore pulp after must sizing mixing is added；
The alkali metal phosphate be sodium tripolyphosphate, calgon press 1:1(mass ratio) compounding dispersing agent.Dosage
For 40mg/L ore pulp, the volume calculating benchmark of ore pulp is that the ore pulp after mother liquor of sizing mixing is sized mixing is added in this step herein.
(3) it is classified boron removal: the ore pulp after sizing mixing being pumped to desliming bucket, most of boronation in mud device removing ore pulp is divided to close
Object, underflow are the low boron carnallite ore pulp of high concentration；Overflow is the high boron mother liquor of low concentration.Low boron carnallite ore pulp ore pulp
Mass concentration is 64.54%；Overflow is that the high boron mother liquor pulp density of low concentration is 5.223%.This step is stripped of 85.23% in raw ore
Alkali formula antifungin calcium compound.
(4) flocculant high boron mother liquid disposal: is added by the amount of 2mg/L high boron mother liquor into the high boron mother liquor of step (3) gained
Polyacrylamide flocculates and settles, and supernatant liquor return step (2) is sized mixing, and lower sediment is discharged into tailing pit.
(5) it decomposes: low boron carnallite ore pulp obtained by step (3) and water, washing mother liquor in mass ratio 1: 0.12: 0.18 is mixed
It closes, is stirred at room temperature 40 minutes, solid-liquid mixed ore pulp is obtained after decomposition；
In each step, washing mother liquor is produced by step (7).The purpose is to by the low high potassium of magnesium generated in step (7)
Washing mother liquor is converted into the low potassium decomposition nut liquid of high magnesium by step (5), recycles the K in mother liquor+, so as to improve the K of whole set process+
The rate of recovery.Whole set process, can K by mass percentage when the first round not having washing Recycling Mother Solution+3.382%、Na+4.326%、Mg2 +3.423%、Cl-16.23%、SO4 2-4.734%, the composition of Yu Weishui is prepared.
(6) flotation: be added in the solid-liquid mixed ore pulp obtained by the step (5) flotation collector using one thick one it is single-minded sweep, essence
The closed circuit floatation process for choosing mine and scavenger concentrate to return to roughing obtains KCl flotation concentrate.
The flotation collector is mixing-in fat amine, is lauryl amine, octadecylamine 1:4 in mass ratio compounding.Dosage is 120g/
T solid-liquid mixed ore pulp.
(7) it washs drying: KCl flotation concentrate obtained by step (6) and water in mass ratio 1: 0.15 being mixed, are stirred at room temperature
30min, after filtering, dry solid phase is KCl product.Liquid phase is to wash mother liquor, and return step (5) decomposes low boron carnallite
Mine.
By above step, K can be obtained+The KCl product of mass content 48.47% meets agricultural KCl national standard Grade A
It is required that the whole set process KCl rate of recovery 74.23%.
Embodiment 2
The present embodiment comprises the steps of:
(1) ore grinding: ore grinding in ore mill is added in high boron carnallite raw ore and ore grinding mother liquor, makes carnallite and boron compound
It is fully dispersed in ore pulp.Ore milling concentration is 50%(mass percent), ore grinding mother liquor uses the chlorine generated in the evaporation process of salt pan
Change potassium, epsomite, carnallite and be saturated mother liquor altogether, grinding fineness is that -20 mesh account for 90wt% or more.
(2) it sizes mixing dosing: using carnallite saturation mother liquor will be through the high boron carnallite after step (1) ore grinding as mother liquor of sizing mixing
Pulp density is adjusted to 12wt%, while alkali metal phosphate is added, the ore pulp after must sizing mixing；
The alkali metal phosphate is sodium tripolyphosphate, calgon by 1:1(mass ratio) compounding.Alkali metal phosphate
Dosage be 50mg/L ore pulp, herein the volume calculating benchmark of ore pulp be in this step be added size mixing mother liquor size mixing after ore pulp.
(3) it is classified boron removal: the ore pulp after sizing mixing being pumped to desliming bucket, most of boronation in mud device removing ore pulp is divided to close
Object, underflow are the low boron carnallite ore pulp of high concentration, pulp density 66.32wt%；Overflow is the high boron mother liquor of low concentration,
Pulp density is 4.632%.87.87% alkali formula antifungin calcium compound in this step removing raw ore.
(4) high boron mother liquid disposal: flocculant is added into the high boron mother liquor of step (3) gained and flocculates and settles, supernatant liquor
Return step (2) is sized mixing, and lower sediment is discharged into tailing pit.
The flocculant is polyacrylamide；Dosage is 3mg/L high boron mother liquor.
(5) it decomposes: low boron carnallite ore pulp obtained by step (3) and water, washing mother liquor in mass ratio 1: 0.10: 0.15 is mixed
It closes, is stirred at room temperature 50 minutes, solid-liquid mixed ore pulp is obtained after decomposition；
In each step, washing mother liquor is produced by step (7).The purpose is to by the low high potassium of magnesium generated in step (7)
Washing mother liquor is converted into the low potassium decomposition nut liquid of high magnesium by step (5), recycles the K in mother liquor+, so as to improve the K of whole set process+
The rate of recovery.Whole set process, can K by mass percentage when the first round not having washing Recycling Mother Solution+3.382%、Na+4.326%、Mg2 +3.423%、Cl-16.23%、SO4 2-4.734%, the composition of Yu Weishui is prepared.
(6) flotation: be added in the solid-liquid mixed ore pulp obtained by the step (5) flotation collector using one thick one it is single-minded sweep, essence
The closed circuit floatation process for choosing mine and scavenger concentrate to return to roughing obtains KCl flotation concentrate.
The flotation collector is mixing-in fat amine, is lauryl amine, octadecylamine 1:4 in mass ratio compounding.Dosage is 100g/
T solid-liquid mixed ore pulp.
(7) it washs drying: KCl flotation concentrate obtained by step (6) and water in mass ratio 1: 0.12 being mixed, are stirred at room temperature
40min, after filtering, dry solid phase is KCl product, and liquid phase is to wash mother liquor, and return step (5) decomposes low boron carnallite
Mine.
By above step, K can be obtained+The KCl product of grade 48.23% meets national standard Grade A requirement, a whole set of work
The skill KCl rate of recovery 72.67%.
Embodiment 3
The present embodiment comprises the steps of:
(1) ore grinding: high boron carnallite raw ore and ore grinding mother liquor are put into ore grinding in ore mill, make carnallite and boron compound
It is fully dispersed in ore pulp.Ore milling concentration is 50%(mass percent), ore grinding mother liquor uses the chlorine generated in the evaporation process of salt pan
Change potassium, epsomite, carnallite and be saturated mother liquor altogether, grinding fineness is that -20 mesh account for 90wt% or more.
(2) it sizes mixing dosing: using carnallite saturation mother liquor will be through the high boron carnallite after step (1) ore grinding as mother liquor of sizing mixing
Pulp density is adjusted to 10wt%, and alkali metal phosphate, the ore pulp after must sizing mixing is added；
The alkali metal phosphate is sodium tripolyphosphate, calgon is compounded by the mass ratio of 1:1.Alkali metal phosphorus is added
The alkali formula antifungin calcium compound for functioning as dispersing agent to disperse in ore pulp of hydrochlorate, reduces it in the table of carnallite mineral
Face absorption.The dosage of alkali metal phosphate is 60mg/L ore pulp, and the volume calculating benchmark of ore pulp is to be added to adjust in this step herein
Pulp liquor size mixing after ore pulp.
(3) it is classified boron removal: the ore pulp after sizing mixing being pumped to desliming bucket, most of boronation in mud device removing ore pulp is divided to close
Object, underflow are the low boron carnallite ore pulp of high concentration, pulp density 65.87wt%；Overflow is the high boron mother liquor of low concentration,
Pulp density is 6.364wt%.89.34% alkali formula antifungin calcium compound in this step removing raw ore.
(4) high boron mother liquid disposal: flocculant is added into the high boron mother liquor of step (3) gained and flocculates and settles, supernatant liquor
Return step (2) is sized mixing, and lower sediment is discharged into tailing pit.
The flocculant is polyacrylamide；Dosage is 4mg/L high boron mother liquor.
(5) it decomposes: low boron carnallite ore pulp obtained by step (3) and water, washing mother liquor in mass ratio 1: 0.08: 0.13 is mixed
It closes, is stirred at room temperature 50 minutes, solid-liquid mixed ore pulp is obtained after decomposition；
In each step, washing mother liquor is produced by step (7).The purpose is to by the low high potassium of magnesium generated in step (7)
Washing mother liquor is converted into the low potassium decomposition nut liquid of high magnesium by step (5), recycles the K in mother liquor+, so as to improve the K of whole set process+
The rate of recovery.Whole set process, can K by mass percentage when the first round not having washing Recycling Mother Solution+3.382%、Na+4.326%、Mg2 +3.423%、Cl-16.23%、SO4 2-4.734%, the composition of Yu Weishui is prepared.
(6) flotation: be added in the solid-liquid mixed ore pulp obtained by the step (5) flotation collector using one thick one it is single-minded sweep, essence
The closed circuit floatation process for choosing mine and scavenger concentrate to return to roughing obtains KCl flotation concentrate.
The flotation collector is mixing-in fat amine, is lauryl amine, octadecylamine 1:4 in mass ratio compounding.Dosage is 80g/t
Solid-liquid mixed ore pulp.
(7) it washs drying: KCl flotation concentrate obtained by step (6) and water in mass ratio 1: 0.12 being mixed, are stirred at room temperature
40min, after filtering, dry solid phase is KCl product.Liquid phase is to wash mother liquor, and return step (5) decomposes low boron carnallite
Mine.
By above step, K can be obtained+The KCl product of grade 48.73% meets national standard Grade A requirement, a whole set of work
The skill KCl rate of recovery 72.34%.
Claims (9)
1. a kind of method of high boron carnallite production KCl, which comprises the following steps:
(1) ore grinding: by high boron carnallite raw ore ore grinding；Keep carnallite and boron compound fully dispersed in ore pulp；
High boron carnallite raw ore B2O3Content >=1.5wt%；
(2) size mixing dosing: with sizing mixing, mother liquor adjusts the high boron carnallite pulp density after step (1) ore grinding to 10~15
Wt %, while alkali metal phosphate is added, the ore pulp after must sizing mixing；
(3) it is classified boron removal: the ore pulp after sizing mixing being pumped to desliming bucket and divides boron compound in mud device removing ore pulp, gained underflow
The as low boron carnallite ore pulp of high concentration；Gained overflow is the high boron mother liquor of low concentration；
Ore pulp i.e. feed slurry concentration after sizing mixing is 10~15wt%；The low boron carnallite pulp density of gained high concentration is 60
~70wt%；The high boron mother liquid concentration of gained low concentration is 4~8wt%；
(4) high boron mother liquid disposal: flocculant is added into the high boron mother liquor of step (3) gained and flocculates and settles, supernatant liquor returns
Step (2) is sized mixing, and lower sediment is discharged into tailing pit；
(5) it decomposes: by low boron carnallite ore pulp obtained by step (3) and water, washing mother liquor in mass ratio 1: 0.08~0.15: 0.10
~0.18 mixing, is stirred at room temperature 40~60 minutes, and solid-liquid mixed ore pulp is obtained after decomposition；
The low boron carnallite is that step (3) are classified the resulting underflow of boron removal；
(6) flotation: flotation collector is added in the solid-liquid mixed ore pulp obtained by the step (5) and single-minded sweep using one thick one, is selected
The closed circuit floatation process that mine and scavenger concentrate return to roughing obtains KCl flotation concentrate；
The flotation collector is mixing-in fat amine, is lauryl amine, octadecylamine 1:3 in mass ratio~5 compounding；Dosage be 80~
120g/t solid-liquid mixed ore pulp；
(7) it washs drying: flotation concentrate obtained by step (6) and water in mass ratio 1: 0.10~0.15 being mixed, are stirred at room temperature 20
~40min, after filtering, dry solid phase is KCl product；Liquid phase is to wash mother liquor, and return step (5) decomposes low boron carnallite
Mine.
2. the method for high boron carnallite production KCl according to claim 1, which is characterized in that in step (1), ore grinding
Mass concentration is 50-65%, and ore grinding mother liquor is saturated mother using potassium chloride, epsomite, the carnallite generated in the evaporation process of salt pan altogether
Liquid；Grinding fineness is that -20 mesh account for 90wt% or more.
3. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in step (2), institute
Stating mother liquor of sizing mixing is that carnallite is saturated mother liquor.
4. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in step (2), institute
Alkali metal phosphate is stated to compound for sodium tripolyphosphate, calgon by the mass ratio of 1:1-1.2.
5. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in step (2), alkali
The dosage of metal phosphate is 40~60mg/L ore pulp.
6. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in step (2), institute
Stating flocculant is polyacrylamide；Dosage is 2~5mg/L high boron mother liquor.
7. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in each step, wash
Washing mother liquor is produced by step (7).
8. the method for high boron carnallite production KCl according to claim 7, which is characterized in that whole set process is first
It, can K by mass percentage when wheel does not have washing Recycling Mother Solution+3.382%、Na+4.326%、Mg2+3.423%、Cl-16.23%、SO4 2-
4.734%, the composition of Yu Weishui is prepared.
9. the method for high boron carnallite production KCl according to claim 1 or 2, which is characterized in that in step (6), ten
Diamines, octadecylamine mass ratio be 1:4.
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| CN1094466C (en) * | 1999-01-04 | 2002-11-20 | 化学工业部连云港设计研究院 | Method of extracting potassium chloride from mixed ore of sylvine and carnallite |
| CN101474598B (en) * | 2009-01-23 | 2012-10-24 | 云南省化工研究院 | Method for flotation of potassium chloride from potassium salt mine |
| CN101723409B (en) * | 2009-12-18 | 2011-09-07 | 中蓝连海设计研究院 | Method for preparing potassium chloride with inferior carnallite |
| CN101905895A (en) * | 2010-08-10 | 2010-12-08 | 山西大学 | Method for producing potassium chloride by using sylvite as raw material |
| CN101982412B (en) * | 2010-11-09 | 2012-07-04 | 化工部长沙设计研究院 | Process for extracting KCl coarse grains by carrying out flotation on solid sylvinite primary ores |
| CN102659148B (en) * | 2012-04-17 | 2013-10-30 | 中国科学院青海盐湖研究所 | Method for preparing magnesium sulfate from tailings produced in extraction of potassium of magnesium sulfate subtype salt lake brine |
| CN102653407B (en) * | 2012-05-03 | 2014-06-04 | 中国科学院青海盐湖研究所 | Method for preparing potassium chloride from sulfate type salt lake brine |
| CN102963912B (en) * | 2012-12-25 | 2014-08-27 | 中蓝连海设计研究院 | Process for producing potassium chloride by using potassic salt ores |
| CN103787372A (en) * | 2014-02-19 | 2014-05-14 | 中国科学院青海盐湖研究所 | Method for extracting potassium chloride from high-silt-content high-grade feldspar salt mine |
| CN104058428B (en) * | 2014-07-10 | 2015-08-26 | 青海盐湖工业股份有限公司 | KCl production system and method produced by a kind of novel carnallitite |
| CN106587107B (en) * | 2016-11-29 | 2018-06-12 | 曲保伦 | A kind of processing method of the sylvite containing mud |
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2017
- 2017-09-12 CN CN201710815235.XA patent/CN107381601B/en active Active
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