CN1180046A - Process for producing potassium chloride from carnallite - Google Patents
Process for producing potassium chloride from carnallite Download PDFInfo
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- CN1180046A CN1180046A CN 97103513 CN97103513A CN1180046A CN 1180046 A CN1180046 A CN 1180046A CN 97103513 CN97103513 CN 97103513 CN 97103513 A CN97103513 A CN 97103513A CN 1180046 A CN1180046 A CN 1180046A
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Abstract
The technological process for producing potassium chloride product by using carnallite ore or its product as raw material is characterized by that its technological process includes the following steps: paste-mixing, inverse flotation, concentration, dehalogenation, destructive crystallization, concentration, filtering, drying, forming potassium chloride, and the solid-liquid ratio of paste-mixing procedure is 15-40%, the flotation agent of inverse flotation procedure is sodium chloride collecting agent, the water-added quantity of destructive crystallization procedure is 700-1100 kg/ton (carnallite raw material), and the magnesium chloride unsaturated solution added quantity is 1100-6000 kg/ton (carnallite refined material). Said method possesses the advantages of coarse product grain size, easy-to-dry, stable and reliable quality, low energy consumption and low cost, etc...
Description
The invention belongs to carnallite or product is raw material production Repone K product Technology field.
Existing is that the method for raw material production Repone K mainly contains thermosoling, flotation process, three kinds of processing methodes of cold decomposition and crystallization method with the carnallitite.The advantage of thermosoling is a Repone K yield height, and constant product quality is not subjected to the influence of ore quality, and its shortcoming is the energy consumption height, and equipment corrosion is serious, the product cost height.Flotation process is to get artificial sylvite after carnallitite is decomposed de-magging, makes the technology of collecting agent flotation Repone K again with stearylamine, and this method technology is simple but shortcoming is to obtain the chlorization product fine size, product drying dehydration difficulty.Cold decomposition and crystallization method is the new technology that development in recent years is got up, it is after carnallitite is added water decomposition crystallization de-magging, add water washing and directly obtain the Repone K crystalline product, its advantage is that energy consumption is low, good product quality, cost is low, and its shortcoming is to carnallitite grade requirement height, it is responsive that Repone K product yield and quality are influenced by the carnallitite head grade, and low-grade carnallite is needed could use after enrichment is handled.
The objective of the invention is the shortcoming at above-mentioned three kinds of technologies existence, absorb the advantage of technologies such as flotation process and cold decomposition and crystallization method, design studies goes out a kind of new processing method---reverse flotation decomposition and crystallization method.It is thick that this method has a product granularity, and easily dry, quality product is not limited by ore quality, and advantage such as steady quality is reliable, and energy consumption is low, and production cost is low, and equipment corrosion is little, and technology is simple.
The technical scheme of this invention is: technical process is for sizing mixing → reverse flotation → dense (one) → dehalogenation → decomposition and crystallization → dense (two) → filtration → washing dehydration → drying → Repone K product.The solid-to-liquid ratio of the operation of sizing mixing is 15-40% (weight ratio), the flotation agent of reverse flotation operation is the sodium-chlor collecting agent, decomposition and crystallization operation amount of water is 700-1100 kilogram/ton carnallitite fine fodder, and adding the magnesium chloride unsaturated solution is 1100-6000 kilogram/ton carnallitite fine fodder.The operation of sizing mixing is the process that the saturated bittern that carnallite adds a certain amount of Repone K or carnallitite is made it to reach certain solid-to-liquid ratio, the carnallitite raw material: the bittern amount is called solid-to-liquid ratio (weight ratio) and is 15-40%.The reverse flotation operation is gained the name at the flotation operation, and the reverse flotation operation is to floatingly select sodium chloride as impurity.Stay the process of carnallitite fine fodder, sodium-chlor collecting agent such as alkyl woods, fatty amide.Preferably selecting its add-on of fatty amide for use is 100-400 gram/ton carnallitite raw material, and the alkyl woods is a 15-150 gram/ton carnallitite raw material, and alkyl Malin mixes with fatty amide to use and is 15-400 gram/ton carnallitite raw material.Often in the operation of sizing mixing, add the sodium-chlor collecting agent convenient in the production.Dense (one) operation is that the carnallitite slurry after removing sodium chloride as impurity is carried out the spissated process of sedimentation, is beneficial to the centrifugal dehalogenation of dehalogenation operation.The decomposition and crystallization operation is that the carnallitite fine fodder behind the dehalogenation is added the process that water or magnesium chloride unsaturated solution decompose recrystallize, its amount of water is 700-1100 kilogram/ton carnallitite fine fodder, adding the magnesium chloride unsaturated solution is 1100-6000 kilogram/ton carnallitite fine fodder, be the water or the 1100-6000 kilogram magnesium chloride unsaturated solution of 1 ton of about 700-1100 kilogram of carnallitite fine fodder adding behind the dehalogenation, also water or magnesium chloride unsaturated solution can be mixed adding.Decomposition is that carnallitite is decomposed, and crystallization is the crystalline potassium chloride crystal, enters dense (two) operation after the decomposition and crystallization again.Dense (two) operation is that the Repone K slurry is further concentrated the process of removing bittern.Filtering operation is the process of further sloughing mother liquor.Can add the washing dehydration operation again after filtering operation, this operation is to add washing decon such as sodium-chlor, magnesium chloride etc., slough residual moisture content, the process of further improving the quality of products, this operation such as quality product have reached the user quality requirement, then this operation can be omitted, and the Repone K work in-process that have certain moisture content after the filtration can directly enter drying process, removes residual moisture content, can obtain exsiccant Repone K product.
In the production, add a certain amount of flotation agent when the carnallitite raw material being sized mixing and carry out reverse flotation, because flotation agent contains the fatty amide of 8-12 carbochain sodium-chlor is had collecting effect preferably, so it can effectively remove the sodium chloride as impurity in the carnallitite raw material with bittern.In the reverse flotation operation successively through roughly selecting, selected, just can remove a large amount of sodium chloride as impurity, must the carnallitite fine fodder.In the reverse flotation operation, in the carnallitite slurry, add the sodium-chlor collecting agent, introducing air in the slurry again, then the water layer on sodium-chlor surface breaks rapidly, and and bubble be closely linked and rise to the ore pulp surface, the foam of these band sodium-chlor ore particles is scraped, just only contain the low-sodium carnalite ore deposit in the remaining ore pulp.Remove part bittern through dense (one), again dehalogenation slough bittern get final product the carnallitite concentrate of low sodium.Decomposition and crystallization is to utilize cold decomposition and crystallization principle to produce the method for coarse particles Repone K, in this operation, if can control the carnallitite dissolution rate well, promptly control the crystallization condition of Repone K, make the dissolution rate of carnallitite too fast, just can obtain thicker potassium chloride particle.Obtaining bigger particulate potassium chloride is to guarantee that the back can be dry smoothly, remove the condition of moisture content fully, potassium chloride particle owing to generation in the existing technology is too thin, can not be dry smoothly, product water content height, thereby influence quality product and benefit, technology of the present invention has solved this difficult problem effectively.Filter the back quality product and just can reach after drying, no longer add the washing dehydration operation after then filtering, otherwise, require height as quality product, can not reach the quality product requirement after drying, increase the washing dehydration operation again after then filtering, the bittern of discharging can be recycled, and the sodium-chlor slurry can use it for anything else.
The present invention at first makes with extra care raw material, solved the defective that quality product is restricted by head grade, found outlet for the utilization of low grade material, this technology has increased the crystalline particle of product in addition, solve this difficult problem of drying and dehydrating difficulty effectively, improved quality product.This technology is all carried out except that drying at normal temperatures and pressures, and is easy to operate, and equipment corrosion is little, and hear rate is low, and product cost is low, and good economic and social benefit is arranged.
Accompanying drawing 1 is a process flow diagram of the present invention.
Embodiment one: get 250 kilograms of carnallitite raw materials, it is 21.7% that raw material is formed KCE content, and magnesium chloride is 27.74%, and sodium-chlor is 17.95%, sizes mixing with 1000 kilograms of carnallitite saturated bitterns.The sodium-chlor collecting agent that the reverse flotation operation adds 25 gram fatty amides behind twice of reverse flotation, carries out dense (one) operation through sedimentation, gets the carnallitite fine fodder behind the dehalogenation.The carnallitite fine fodder is 215 kilograms, and it forms Repone K is 25.20%, and magnesium chloride is 32.19%, and sodium-chlor is 5.88%.With 160 kg of water decomposition and crystallization, through dense (two), filter the Repone K work in-process, it forms Repone K is 92.65%, sodium-chlor 5.91%, insolubles impurity are 1.44%.Water gets 40 kilograms of Repone K products to the washing of Repone K work in-process, dehydration, drying again, and it consists of Repone K 98.42%, insolubles 1.58%.
Embodiment two: get 100 kilograms of carnallitite raw materials, size mixing with 350 kilograms of bittern.The reverse flotation operation adds 20 grams and contains the fatty amide of 8-12 carbochain and the sodium-chlor collecting agent of 3 gram alkyl woodss, gets 87 kilograms of carnallitite fine fodders again behind dense (one), dehalogenation.With 160 kilograms of magnesium chloride unsaturated solutions the carnallitite fine fodder is carried out decomposition and crystallization,, just can get 17 kilograms of Repone K products again through dense (two), filtration, drying.
Claims (3)
1, a kind of process for producing potassium chloride from carnallite is characterized in that:
(1) technical process: (one) → dehalogenation → decomposition and crystallization of sizing mixing → reverse flotation → dense → dense (two) → filtration → drying → Repone K product:
(2) the size mixing solid-to-liquid ratio of operation is 15-40% (weight ratio), the flotation agent of reverse flotation operation is the sodium-chlor collecting agent, decomposition and crystallization operation amount of water is 700-1100 kilogram/ton carnallitite fine fodder, and adding the magnesium chloride unsaturated solution is 1100-6000 kilogram/ton carnallitite fine fodder.
2, technology according to claim 1 is characterized in that increasing the washing dehydration operation after filtering operation.
3, according to claim 1,2 described technologies, it is characterized in that the sodium-chlor collecting agent is a fatty amide, its add-on is a 100-400 gram/ton carnallitite raw material, the alkyl woods is a 15-150 gram/ton carnallitite raw material, and the alkyl woods mixes with fatty amide to use and is 15-400 gram/ton carnallitite raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103513A CN1052705C (en) | 1997-03-13 | 1997-03-13 | Process for producing potassium chloride from carnallite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103513A CN1052705C (en) | 1997-03-13 | 1997-03-13 | Process for producing potassium chloride from carnallite |
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| Publication Number | Publication Date |
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| CN1180046A true CN1180046A (en) | 1998-04-29 |
| CN1052705C CN1052705C (en) | 2000-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN97103513A Expired - Lifetime CN1052705C (en) | 1997-03-13 | 1997-03-13 | Process for producing potassium chloride from carnallite |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120803C (en) * | 1999-11-19 | 2003-09-10 | 乔希海 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
| CN100364891C (en) * | 2004-12-22 | 2008-01-30 | 江进兴 | Method for preparing potassium chloride by sunshine thermo solvation |
| CN100439247C (en) * | 2003-12-31 | 2008-12-03 | 科学与工业研究委员会 | Simultaneous recovery of potassium chloride and KC1 enriched edible salt |
| CN101157460B (en) * | 2007-08-28 | 2010-09-01 | 中国科学院青海盐湖研究所 | Method for preparing potassium chloride by employing sulfate type salt lake potassium-containing brine |
| 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 |
| 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 |
| CN103193252A (en) * | 2013-04-24 | 2013-07-10 | 化工部长沙设计研究院 | Method for producing potassium chloride by adopting carnallite hot-melt brine |
| CN104058427A (en) * | 2014-07-03 | 2014-09-24 | 青海盐湖工业股份有限公司 | High-grade potassium chloride production system and method thereof |
| CN107162017A (en) * | 2017-07-05 | 2017-09-15 | 青海盐湖工业股份有限公司 | The recovery and processing system and method for mother liquor in a kind of potash fertilizer production |
| CN107555451A (en) * | 2017-08-28 | 2018-01-09 | 青海盐湖工业股份有限公司 | A kind of method that potassium chloride is produced using tail salt mine |
| CN107572552A (en) * | 2017-10-11 | 2018-01-12 | 青海盐湖工业股份有限公司 | A kind of production technology from carnallite preparing potassium chloride |
| CN109541127A (en) * | 2018-12-19 | 2019-03-29 | 青海盐湖工业股份有限公司 | The method that a kind of pair of saturated potassium chloride solution carries out assay |
| CN109626398A (en) * | 2019-02-13 | 2019-04-16 | 青海盐湖工业股份有限公司 | A kind of method of essence potassium slurry concentration dehalogenation |
| WO2020177159A1 (en) * | 2019-03-06 | 2020-09-10 | 青海盐湖工业股份有限公司 | Method and system for producing potassium chloride capable of recycling byproduct |
| CN112299450A (en) * | 2020-11-18 | 2021-02-02 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride by grading crude potassium and potassium chloride prepared by applying method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384737C (en) * | 2004-06-09 | 2008-04-30 | 华东理工大学 | Preparing method for potassium chloride with low calcium sulfate content |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3435124C2 (en) * | 1984-09-25 | 1987-03-05 | Kali Und Salz Ag, 3500 Kassel | Process for the production of potassium chloride with more than 55 wt.% K↓2↓O from the fine decomposition salt of carnallite decomposition |
-
1997
- 1997-03-13 CN CN97103513A patent/CN1052705C/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120803C (en) * | 1999-11-19 | 2003-09-10 | 乔希海 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
| CN100439247C (en) * | 2003-12-31 | 2008-12-03 | 科学与工业研究委员会 | Simultaneous recovery of potassium chloride and KC1 enriched edible salt |
| CN100364891C (en) * | 2004-12-22 | 2008-01-30 | 江进兴 | Method for preparing potassium chloride by sunshine thermo solvation |
| CN101157460B (en) * | 2007-08-28 | 2010-09-01 | 中国科学院青海盐湖研究所 | Method for preparing potassium chloride by employing sulfate type salt lake potassium-containing brine |
| 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 |
| CN103193252A (en) * | 2013-04-24 | 2013-07-10 | 化工部长沙设计研究院 | Method for producing potassium chloride by adopting carnallite hot-melt brine |
| CN103193252B (en) * | 2013-04-24 | 2014-06-25 | 化工部长沙设计研究院 | Method for producing potassium chloride by adopting carnallite hot-melt brine |
| CN104058427A (en) * | 2014-07-03 | 2014-09-24 | 青海盐湖工业股份有限公司 | High-grade potassium chloride production system and method thereof |
| CN107162017A (en) * | 2017-07-05 | 2017-09-15 | 青海盐湖工业股份有限公司 | The recovery and processing system and method for mother liquor in a kind of potash fertilizer production |
| CN107162017B (en) * | 2017-07-05 | 2019-03-15 | 青海盐湖工业股份有限公司 | The recovery and processing system and method for mother liquor in a kind of production of potash fertilizer |
| CN107555451A (en) * | 2017-08-28 | 2018-01-09 | 青海盐湖工业股份有限公司 | A kind of method that potassium chloride is produced using tail salt mine |
| CN107572552A (en) * | 2017-10-11 | 2018-01-12 | 青海盐湖工业股份有限公司 | A kind of production technology from carnallite preparing potassium chloride |
| CN107572552B (en) * | 2017-10-11 | 2020-03-24 | 青海盐湖工业股份有限公司 | Production process for preparing potassium chloride from carnallite |
| CN109541127A (en) * | 2018-12-19 | 2019-03-29 | 青海盐湖工业股份有限公司 | The method that a kind of pair of saturated potassium chloride solution carries out assay |
| CN109626398A (en) * | 2019-02-13 | 2019-04-16 | 青海盐湖工业股份有限公司 | A kind of method of essence potassium slurry concentration dehalogenation |
| WO2020177159A1 (en) * | 2019-03-06 | 2020-09-10 | 青海盐湖工业股份有限公司 | Method and system for producing potassium chloride capable of recycling byproduct |
| CN112299450A (en) * | 2020-11-18 | 2021-02-02 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride by grading crude potassium and potassium chloride prepared by applying method |
| CN112299450B (en) * | 2020-11-18 | 2023-02-28 | 青海盐湖工业股份有限公司 | Method for preparing potassium chloride by grading crude potassium and potassium chloride prepared by applying method |
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| Publication number | Publication date |
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| CN1052705C (en) | 2000-05-24 |
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Owner name: QINGHAI SALT LAKE INDUSTRIAL CO., LTD. Free format text: FORMER NAME: YANHU INDUSTRY GROUP CO., LTD. QINGHAI |
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Address after: 816000 No. 28, the Yellow River Road, Golmud, Qinghai Patentee after: Qinghai Salt Lake Industry Co., Ltd. Address before: The Yellow River City, Qinghai province 816000 Erythrophleum Road No. 1 Patentee before: Yanhu Industry Group Co., Ltd. Qinghai |
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Granted publication date: 20000524 |