CN1031359A - From carnallite, produce the method for Repone K and Cardia Salt - Google Patents
From carnallite, produce the method for Repone K and Cardia Salt Download PDFInfo
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- CN1031359A CN1031359A CN 87105820 CN87105820A CN1031359A CN 1031359 A CN1031359 A CN 1031359A CN 87105820 CN87105820 CN 87105820 CN 87105820 A CN87105820 A CN 87105820A CN 1031359 A CN1031359 A CN 1031359A
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- repone
- carnallite
- carnallitite
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- crystal
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- 238000000034 method Methods 0.000 title claims abstract description 35
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 title claims abstract description 32
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 title claims abstract description 32
- 150000003839 salts Chemical class 0.000 title claims abstract description 16
- 210000002318 cardia Anatomy 0.000 title claims abstract description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000011780 sodium chloride Substances 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims description 21
- 239000001103 potassium chloride Substances 0.000 claims description 16
- 238000002425 crystallisation Methods 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 241001131796 Botaurus stellaris Species 0.000 claims description 11
- 239000013505 freshwater Substances 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 9
- 229910052736 halogen Inorganic materials 0.000 claims description 9
- 150000002367 halogens Chemical class 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims 2
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims 1
- 239000012141 concentrate Substances 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- 239000000543 intermediate Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 16
- 239000007787 solid Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005188 flotation Methods 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- 229940072033 potash Drugs 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 3
- 235000015320 potassium carbonate Nutrition 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010410 dusting Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- SWHAQEYMVUEVNF-UHFFFAOYSA-N magnesium potassium Chemical class [Mg].[K] SWHAQEYMVUEVNF-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Abstract
This disclosure of the Invention a kind of method of from carnallite, producing Repone K and Cardia Salt product.Adopt the size of certain method control carnallitite granularity, again with the otherness form the basis on NaCl crystal, carnallitite crystal, the KCl crystal equigranular, adopt the method for mechanical grading, carry out preliminary purification, it is simple that it has technical process, produces power consumption and lack, and product cost is low, three-waste free pollution, advantage such as the utilization of resources is reasonable.Adopt the excessive cold cut method of condensing crystal again and again again, further improved the performance of Repone K product.
Description
The invention belongs to field of inorganic chemical engineering.
The carnallite that chloride type potassium magnesium salts bittern makes through natural evaporative crystallization, with the technology that carnallite is produced Repone K, what adopt the earliest is the thermosol crystallization process.Arrived the fifties, the thermosol crystallization process is replaced by cold decomposition-flotation-washing technology gradually.Arrive the eighties, adopted cold cut-cold crystallization technology progressively to replace cold decomposition-flotation-washing technology abroad.But the details of cold cut-cold crystallization technology is not appeared in the newspapers.The carnallite that present domestic coastal area makes from seawater, the method that is reprocessed into the employing of Repone K product is the thermosol crystallization process, and this method power consumption is high, and facility investment is big, thereby the production cost height.The Potassium process that the Qinghai potash fertilizer plant adopts is the cold decomposition of carnallite-flotation-washing technology.This method will adopt flotation reagent, so there is following shortcoming: the one, this flotation reagent costs an arm and a leg; The 2nd, take away a large amount of KCl in the flotation mother liquor, and this part KCl reclaims difficulty, cause the rate of recovery of Repone K to reduce; The 3rd, flotation mother liquor comprehensive utilization difficulty, and make production environment seriously polluted; The 4th and since process using flotation reagent, so in the KCl product, also contain some this flotation reagent, make quality product low, re-workability is poor; The 5th, the energy consumption height, product thickening filtration difficulty, initial cost is big, shortcomings such as production cost height.
The purpose of this invention is to provide a kind of novel process of from carnallite, producing Repone K and Cardia Salt product.It is simple that it has technology, and the building equipment less investment need not to add any flotation reagent in the technological process, the quality product height, and production cost is low, the rate of recovery height of KCl, non-environmental-pollution is to series of advantages such as the carnallite utilization of resources is reasonable.
The theoretical foundation that the present invention adopts is a particle size study.Find that in the process of research carnallite granularity the granularity of general carnallitite is all greater than NaCl crystalline granularity in the carnallite, NaCl crystalline granularity is again all greater than KCl crystalline granularity in the thick potassium.According to above this principle, thereby established theoretical basis of the present invention.This invention is adopted the crystal size by various components in the carnallite to vary in size to carry out mechanical grading, can remove 60～80% NaCl impurity, and the KCl content in the carnallite is effectively improved, adopt cold decomposition again, part NaCl particle is removed in screening for the second time, just can obtain purified KCl product through operations such as evaporation concentration, filtrations again.And after screening the NaCl impurity removed, through the hydrocyclone concentration, fine grain after sedimentation as mine tailing comprehensive utilization (simple herein) again again, and coarse grained because of containing a spot of KCl crystal, unnecessary MgCl is removed in washing after filtration
2After can obtain the Cardia Salt product.
Figure (1) is a process flow sheet of the present invention.
Requirement for carnallite is: the granularity in the carnallite is lower than 20% less than other content of 0.5 grade. Reach the requirement of mechanical grading for the granularity that makes carnallite, the method that adopts is with the complete carnallite of for the first time crystallization, bleed off old halogen, 0.5～1.5 times new halogen putting into again for the first time crystallization carnallite bittern enters crystallizing pond, make carnallite continue crystallization, to be crystallized complete, bleed off again the carnallite that old halogen can obtain meeting the requirements. After this carnallite and old halogen mix (solid-to-liquid ratio is 1: 5～15), through the screening of screening I, the screening I adopt vibratory sieve or recoil dusting cover all can, sieve diameter is 0.2～2 millimeter. After screening I screening, solid (major part be NaCl) and bittern below the sieve aperture with "-" expression, the solid above the sieve aperture (major part is carnallite), use "+" to represent. Carnallite after for the first time screening adds fresh water and carries out cold decomposition, makes MgCl in the carnallite2Dissolving, the fresh water amount that adds of cold decomposition is greater than the theoretical value amount. After decomposing, the crystal size of KCl is far smaller than the granularity of NaCl crystal, owing to there is a large amount of NaCl to exist in the rework solution, so single crystalline NaCl does not have dissolving substantially in the solid, its granule size is also less than what big variation, through screening II operation mechanical grading, remove most of NaCl remaining in the solid again, the screening II adopts cyclone, recoil dusting cover and the vibratory sieve all can (sieve diameter is 0.2～2 millimeter. Solid on sieve aperture is the NaCl solid substantially, and below sieve aperture then is KCl crystal and decomposition nut liquid substantially. Remove clear liquid bittern (returning salt pan carnallite processed) through the sedimentation operation again, the solid after concentrating and bittern is washing procedure after filtration, removes remaining MgCl2With part NaCl impurity, the fresh water amount that adds is 25～50% of amount of solid, filtrate and washing lotion are returned the salt pan and are produced carnallite, solid (being also referred to as the intermediate products of KCl) after the washing adds the fresh water cold cut more after filtration, namely add excessive fresh water amount and all dissolve NaCl in the solid, the addition of fresh water be the theoretical value amount of water 120～200% between, and then evaporative crystallization, remove unnecessary moisture content in the dissolving NaCl process, this process crystallization just occurred as control terminal point (NaCl content is as 15.5～16.0% in the liquid) take NaCl, the KCl product that can obtain making with extra care after filtration again, the mother liquor after the filtration uses as cold decomposition water. Fine particle solid and bittern after the screening of screening I carry out concentration by hydrocyclone, and fine grained and bittern are after sedimentation, and bittern returns the screening I as the circulation halogen of screening I operation, and mine tailing fully utilizes as other chemical products. Coarse grained after filtration washing can obtain the Cardia Salt product, and the fresh water amount of adding determines that by the requirement of Cardia Salt product the bittern behind the filtration washing returns salt pan salt manufacturing and carnallite is used.
This technological process is compared with other technological process, has following advantage: one, good product quality. Do not add in process of production any organic and inorganic reagent, thereby the product purity height, and particle property might as well. Two, technological process is simple, and the building equipment small investment is so production cost is low. Three, more reasonable to the utilization of resources, three-waste free pollution, and the rate of recovery of KCl is also higher.
Embodiment: sample is got 4.0 tons of the carnallites in Qinghai potash fertilizer plant first dressing-works.Consisting of of carnallite: KCl19.92%; NaCl22.37%; MgCl
2Be 27.18%; Other insolubles is 2.13%.
Experiment process is shown in figure (1).The screening I adopts the screening of XSG5-74 type wet type fine sizing machine, and the treatment capacity of sieve apparatus is a 188.5Kg/ rice
2The time, sieve diameter is 0.5 millimeter, as delivery medium, solid-to-liquid ratio is 1: 10 to the screening I with the old halogen in salt pan.The fresh water amount of cold decomposition is 520Kg, and the amount of water of filtration washing is 200Kg, and the amount of water of cold cut is 1288Kg, and the sieve diameter of screening II is 0.373 millimeter.Solid below screening I screening orbital canal,posterior internal, the fresh water that adds in the filtration washing process is 400Kg.Obtain the smart potassium of 646Kg at last, the Cardia Salt product of 492Kg.
Example 2: potash fertilizer plant salt pan, Qinghai carnallite granularity is thinner, takes this carnallite is mixed the measure that continues evaporative crystallization with equivalent KCl bittern, and-0.52 millimeter level drops to 15.29% from 59.4% in the ore.Carnallite each component concentration KCl19.86%, NaCl14.64%, MgCl after the increase granularity
228.69%.With flow process and the condition identical with example 1, the high-quality Repone K product production that makes is 15.16% of the processing carnallite, and Cardia Salt output is 10.55% of the processing carnallite.
Claims (3)
1, a kind ofly produce the method for Repone K and Cardia Salt product with carnallite as raw material, it comprises operations such as cold decomposition, sedimentation, filtration washing, cold cut, hydrocyclone concentrate, and it is characterized in that:
A. this process using screening operation makes sodium chloride crystal with the carnallitite crystal separately; Sodium-chlor is separated with potassium chloride;
B. control the method for carnallitite particle property in this technology, the carnallitite that adopts crystallization for the first time to finish bleeds off old halogen, puts into 0.5～1.5 times new halogen of the carnallitite of crystallization for the first time bittern again, makes carnallitite continue crystallization, and to be crystallized finishing bleeds off its old halogen again;
C. the method that improves Repone K product granularity characteristic in this technology is the intermediates with Repone K, adds excessive fresh water dissolution and falls wherein impurity, removes excessive moisture content through evaporation again, and the potassium chloride granularity is increased.
2, method according to claim 1, the sieve diameter that it is characterized in that sieving operation is 0.2～2 millimeter.
3, method according to claim 1, it is characterized in that improving Repone K product granularity characteristic, to add excessive fresh water amount be 20～100% of theoretical value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105820 CN1031359A (en) | 1987-08-21 | 1987-08-21 | From carnallite, produce the method for Repone K and Cardia Salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87105820 CN1031359A (en) | 1987-08-21 | 1987-08-21 | From carnallite, produce the method for Repone K and Cardia Salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1031359A true CN1031359A (en) | 1989-03-01 |
Family
ID=4815459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87105820 Pending CN1031359A (en) | 1987-08-21 | 1987-08-21 | From carnallite, produce the method for Repone K and Cardia Salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031359A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439247C (en) * | 2003-12-31 | 2008-12-03 | 科学与工业研究委员会 | Simultaneous recovery of potassium chloride and KCl-rich edible salt |
| CN101433333B (en) * | 2008-12-17 | 2012-01-25 | 上海明太化工发展有限公司长沙分公司 | Salt taste additive agent, low-sodium salt taste agent and preparation thereof |
| CN103037711A (en) * | 2010-06-18 | 2013-04-10 | 北冰洋盐 | Production of low sodium salt with balanced mineral content |
| CN103265055A (en) * | 2013-03-30 | 2013-08-28 | 天津科技大学 | System and processing of the preparation of potassium chloride in lare grains by cold decomposition crystallization of high sodium potassium salt ore and flotation method |
| CN111170336A (en) * | 2020-02-24 | 2020-05-19 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride from carnallite raw ore |
| CN111547745A (en) * | 2020-05-18 | 2020-08-18 | 天津君瑞和科技有限公司 | Method for removing sodium chloride from bittern produced by seawater |
-
1987
- 1987-08-21 CN CN 87105820 patent/CN1031359A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439247C (en) * | 2003-12-31 | 2008-12-03 | 科学与工业研究委员会 | Simultaneous recovery of potassium chloride and KCl-rich edible salt |
| CN101433333B (en) * | 2008-12-17 | 2012-01-25 | 上海明太化工发展有限公司长沙分公司 | Salt taste additive agent, low-sodium salt taste agent and preparation thereof |
| CN103037711A (en) * | 2010-06-18 | 2013-04-10 | 北冰洋盐 | Production of low sodium salt with balanced mineral content |
| CN103037711B (en) * | 2010-06-18 | 2015-06-03 | 北冰洋矿产有限责任公司 | Production of low sodium salt with balanced mineral content |
| CN103265055A (en) * | 2013-03-30 | 2013-08-28 | 天津科技大学 | System and processing of the preparation of potassium chloride in lare grains by cold decomposition crystallization of high sodium potassium salt ore and flotation method |
| CN111170336A (en) * | 2020-02-24 | 2020-05-19 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride from carnallite raw ore |
| CN111170336B (en) * | 2020-02-24 | 2022-04-22 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride from carnallite raw ore |
| CN111547745A (en) * | 2020-05-18 | 2020-08-18 | 天津君瑞和科技有限公司 | Method for removing sodium chloride from bittern produced by seawater |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |