CN1120803C - Process for producing potassium chloride from alkaline slag and potassium feldspar - Google Patents
Process for producing potassium chloride from alkaline slag and potassium feldspar Download PDFInfo
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- CN1120803C CN1120803C CN99123761A CN99123761A CN1120803C CN 1120803 C CN1120803 C CN 1120803C CN 99123761 A CN99123761 A CN 99123761A CN 99123761 A CN99123761 A CN 99123761A CN 1120803 C CN1120803 C CN 1120803C
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- Prior art keywords
- leaching
- felspar sand
- potassium felspar
- alkaline residue
- potassium
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- 238000000034 method Methods 0.000 title claims abstract description 53
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 29
- 239000002893 slag Substances 0.000 title claims abstract description 17
- 239000001103 potassium chloride Substances 0.000 title abstract description 7
- 235000011164 potassium chloride Nutrition 0.000 title abstract 4
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 title 1
- 238000002386 leaching Methods 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 241001131796 Botaurus stellaris Species 0.000 claims abstract description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 8
- 239000001110 calcium chloride Substances 0.000 claims abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 46
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 45
- 239000011591 potassium Substances 0.000 claims description 45
- 239000004576 sand Substances 0.000 claims description 30
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003672 processing method Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 206010044565 Tremor Diseases 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 235000017550 sodium carbonate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000012452 mother liquor Substances 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 2
- 238000009656 pre-carbonization Methods 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 15
- 229940072033 potash Drugs 0.000 abstract description 15
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract description 15
- 235000015320 potassium carbonate Nutrition 0.000 abstract description 15
- 239000011780 sodium chloride Substances 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 5
- 239000003518 caustics Substances 0.000 abstract 4
- 239000010433 feldspar Substances 0.000 abstract 4
- 239000010802 sludge Substances 0.000 abstract 4
- 238000005245 sintering Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 14
- 238000001704 evaporation Methods 0.000 description 12
- 230000008020 evaporation Effects 0.000 description 12
- 239000003337 fertilizer Substances 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 12
- 238000005119 centrifugation Methods 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 238000005352 clarification Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- MQWCQFCZUNBTCM-UHFFFAOYSA-N 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylphenyl)sulfanyl-4-methylphenol Chemical compound CC(C)(C)C1=CC(C)=CC(SC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O MQWCQFCZUNBTCM-UHFFFAOYSA-N 0.000 description 1
- 241000201295 Euphrasia Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- AMAICRYCMCVAHT-UHFFFAOYSA-K calcium;sodium;trichloride Chemical compound [Na+].[Cl-].[Cl-].[Cl-].[Ca+2] AMAICRYCMCVAHT-UHFFFAOYSA-K 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- DPLVEEXVKBWGHE-UHFFFAOYSA-N potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000007601 warm air drying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The present invention relates to a technological method for manufacturing potassium chloride by using caustic sludge and potash feldspar. The technological method is characterized in that potash feldspar and caustic sludge are used as raw materials, and the proportion of potash feldspar to caustic sludge is from 1:0.5 to 5, 0 to 80% of bitter bittern of the weight of potash feldspar can be added, the materials pass through the working procedures of raw slurry, sintering and leaching, potassium chloride, sodium chloride and calcium chloride are extracted from the leaching liquor, and the leaching slag is washed, pressed and filtered to manufacture solid slag of various products such as engineering soil and raw materials for building products. The technological method can process a large amount of caustic sludge and can obtain the product of domestic emergent potassium chloride, all raw materials are recycled, and all components of the raw materials are almost converted into industrial products with high added value. The present invention has the advantages of no discharge of three waste and reasonable process flow.
Description
The invention belongs to solvay soda process produces the comprehensive utilization of discharging waste residue in the soda ash process and makes the Repone K field with potassium felspar sand.
Solvay soda process is produced a large amount of waste residues that discharge in the soda ash process and is piled up throughout the year, a large amount of soils had both accounted for, contaminate environment again, existing waste reside comprehensive utilization method is a lot, as " manufacture method of alkaline residue producing building clay " (CN871082), " method of chlor-alkali waste residue system cement " (CN89108216), these two kinds of methods have attempted alkaline residue is become useful product, but implement comparatively difficulty, cost is also high, also has many methods also because a variety of causes and there is certain defective in heavy industrialization, CN95106293.X " method of producing engineering soil from alkaline slag ", the evaluation of Tianjin capital construction commission and State Scientific and Technological Commission's combination weave has been passed through in the enforcement of this method, this method has changed the alkaline residue structure with stirring means, makes it easily to do dehydration, makes engineering earth after the conventional airing, performance is fabulous, administer alkaline residue for heavy industrialization and opened up road, but products obtained therefrom is only done engineering earth, economical except that value added lower, so this method biases toward the processing alkaline residue, the useful component in the alkaline residue all can not be used fully; The potash fertilizer of China is in great shortage at present, and the potash fertilizer output of China only accounts for 0.34% of Gross World Product, and this amount can only satisfy about 10% of domestic potash fertilizer demand, China utilizes potassium bearing rock to produce potash fertilizer, existing significant deficiency, mainly is that the ore amount of the required processing of production potash fertilizer is big, according to the pertinent data introduction, produce one ton of potassium sulphide and need 8.33 tons of milling of ores, energy consumption height, material consumption are big, and byproduct is many, the separating technology complexity, product is competitiveless, particularly adds NaCl or CaCl with potassium bearing rock
2The roasting method method of producing potash fertilizer because grog produces vitreum crystallization (common name dross) after the roasting, be unfavorable for leaching, so this method is difficult to industrial mass production so far.
One's duty makes eye bright provides a kind of above-mentioned defective that overcomes, can administer alkaline residue in a large number, make full use of the useful component in the alkaline residue, can obtain " processing method of alkaline residue, potassium felspar sand system Repone K " of domestic urgent need potash fertilizer again, this method is in the reaction of raw materials such as potassium bearing rock and alkaline residue, and all the components almost all is converted into the higher Industrial products of economic value added, and all materials recycle in the technological process, no waste liquid, waste gas, waste discharge, technical process is reasonable.
The present invention realizes like this, with reference to Fig. 1, it is the alkaline residue or wet slag or the waste residue liquid warp pre-carbonization of the direct waste residue liquid that discharges after press filtration of piling up all the year round with the waste residue liquid that discharges in the solvay soda process production soda ash process, wet slag after the press filtration is as raw material and potassium felspar sand batching, with levigated potassium felspar sand (1) and alkaline residue (2) with potassium felspar sand: the ratio of alkaline residue=1: 0.5～5 adds charge pulp operation (3), add the mother liquor of calcium of carrying in the calcium chloride process (31), material stirs through mixing in the charge pulp operation and enters calcining process (7) after trembling evenly, grog after the roasting enters pulverizing process (8), grog after the pulverizing enters leaching operation (9), the leaching liquid (10) that comes out from the leaching operation passes through evaporation concentration (11), centrifugation (12), crystallisation by cooling (13), centrifugation (14), thick potassium washing (15), centrifugation (16) purity is 90% Repone K product (17); The crude salt (18) that comes out from centrifugation (12) enters crude salt washing (19), again through centrifugation (20), warm air drying (21) purity is 96% sodium-chlor product (22), the desalinization of soil by flooding or leaching liquid (23) that centrifugation (20) is come out delivers to crude salt washing procedure (19) and evaporation concentration operation (11) recycles; The filter potassium liquid (24) that comes out from centrifugation (14) is through evaporation concentration (25), clarification separates (26), evaporation concentration (27), clarification separates (28), evaporation concentration (29) purity is 70% calcium chloride product (30), from clarification separate the mother liquor of calcium (31) that (28) comes out get back to the evaporation concentration operation (25) or as a supplement material add in the charge pulp operation (3) and recycle, separate the mixing salt (32) that (26) comes out from clarification and separate the double salt (33) that (28) comes out from clarification and get back to evaporation concentration operation (11) and recycle; Can be after washing and filter pressing operation (35) is handled from the leaching slag (34) that the leaching operation is come out as the solid slag (39) of engineering earth and building product raw material, washings behind the washing and filter pressing (36) is got back to leaching operation (9) to reduce water consumption and to improve leaching rate, is delivered to evaporation concentration operation (11) from the calcining process tail gas discharged with induced draft fan (37) and improves vaporization efficiency in order to recovery waste heat.
Bittern (38), the bittern that also can add selection component potassium felspar sand weight 0～80% in the described proportioning raw materials were exactly the important source material of making Repone K originally, used bittern also can solve the saltern waste material.
Described leaching operation can adopt the multiple coil leacher, also can adopt conventional leaching equipment.
The charge pulp operation is stirred to tremble evenly with mixing of materials and is advisable, and fineness 100～300 orders of potassium felspar sand get final product, and potassium felspar sand is thin more, and roasting is good more.
Roasting apparatus can be selected horizontal rotary kiln, tunnel furnace, rolling tunnel kiln or vertical rotating stove for use, 750～900 ℃ of maturing temperatures, roasting time 35～90 minutes; Disintegrating apparatus can adopt roller to shoulder, and purpose is in order to strengthen after the roasting grog fineness to improve the leaching efficiency of operation down; The leaching operation adopts counter-current extraction when adopting the multiple coil leacher, but water saving improves leaching rate, and leaching temperature is controlled at 80 ± 5 ℃ for well; The processing of leaching slag can be adopted the plate-and-frame filter press washing and filter pressing, vacuum filtration or directly store up, or add large granular materials and stir and tremble or tremble even back and store up naturally, to reach the solid-liquid separation purpose, isolated liquid is got back to the leaching operation, the gained solid slag can be used as engineering earth and building product raw material such as engineering earth, afforests with soil, brickmaking, building block, materials for wall, also can make the raw material of cement, binding agent etc.
Extract resultant KCL, NaCL, CaCL by leaching liquid
2Be common process, processing condition are no longer carefully stated.
The reaction mechanism of the processing method of alkaline residue of the present invention, potassium felspar sand system Repone K is inquired into, alkaline residue chemical composition content (%) (taking from old slag field): CaCO
336～61, H
2O50～64, CaO6～15, CaCL
25～16, Mg (OH)
24～13, CaSO
41～6, NaCL0.4～7, Fe
2O
30.4～1, SiO
25～10, AL
2O
32～4, the reaction of alkaline residue and potassium felspar sand is roughly as follows:
From reaction formula, the CaCL in the alkaline residue
2, NaCL carries comparatively ideal transforming agent of potassium from potassium felspar sand, because with NaCL and CaCL
2Direct and potassium felspar sand roasting is produced the KCL grog and is easily formed the dross vitreum, and the unfavorable leaching of operation down causes with potassium bearing rock and NaCL, CaCL
2The suitability for industrialized production of reaction system KCL fail to realize.
The processing method of alkaline residue of the present invention, potassium felspar sand system Repone K is because raw material alkaline residue composition mainly is CaCO
3With NaCL, CaCL
2, the potassium double salt reaction that contains in these compositions and the potassium bearing rock generates CO
2, make grog porous after the roasting, loose, degree of mobilization good, this is the result who has made full use of the alkaline residue feature, has illustrated that must add alkaline residue with potassium felspar sand system Repone K just can make manufactureization, can also add in blending process and carry CaCL
2Mother liquor of calcium in the process (4) or interpolation sodium chloride (5) or calcium chloride (6) are according to chlorine root in the alkaline residue and potassium felspar sand composition analysis, to determine NaCL or CaCL
2Amount replenish the chlorine root.
Because the inventive method is used alkaline residue in a large number, for huge space and economic has been opened up in the existence of solvay soda process, as everyone knows, the alkaline residue discharging of solvay soda process always is the great key issue that restriction soda ash is produced, we can say, making alkaline residue not only no longer is the heavy burden of solvay soda process, high value added product KCl, NaCl, CaCl that alkaline residue forms
2Be again that product is badly in need of in chemical fertilizer industry, therefore the enforcement of this method is for having difficulty in taking a step, the important channel that the ammonia alkali factory of Market competition extricates oneself from a predicament beyond doubt, particularly the potash fertilizer industry in China's chemical industry is very weak, its throughput far can not satisfy domestic needs, China has become maximum in the world potash fertilizer importer in recent years, and a year import volume reaches ten thousand tons of 400-500, and the enforcement of processing method of the present invention can be filled up the blank of potash fertilizer industry.
Because the inventive method raw material is to utilize waste soda residue, cost is extremely cheap, and rational its product of processing method is except KCl, NaCl, CaCl
2Outside the Chemicals added value is higher, be it is generally acknowledged with potassium bearing rock production potash fertilizer milling of ores amount big, a byproduct separation difficulty and the difficult problem that can't effectively utilize again, solved by the inventive method, the rational operational path of present method extracts the extraction efficiency height of above-mentioned Chemicals, and residue obtained objectionable constituent are few, for wide path has been opened up in the utilization of these materials, main chemical compositions is SiO in the residue
240～50%, Fe
2O
37～10%, Al
2O
310～15%, CaO20～25%, MgO0.5～1%, K
2O2～3%, Cl
-Below 1%, SO
4 =Below 1%, these materials can be done engineering earth and building product raw material, as brickmaking, building block, materials for wall, cement and binding agent raw material etc., owing to made full use of Mineral resources and residue resource, gained Chemicals and numerous material of construction, make its remarkable in economical benefits, and three-waste free discharge in the process, another major action in the environment protection treating industry become.
The equipment that processing method of the present invention adopted conventional equipments such as to be current manufacture of cement with clarification separate, make Technology more reliable, therefore facility investment is less, the investment output is bigger, make this processing method form the industry scale, for China's chemical industry and sustainable development economy strategy are made huge contribution.
Description of drawings
Fig. 1 is the processing method process flow diagram of alkaline residue of the present invention, potassium felspar sand system Repone K.
The present invention is not limited to the following example, is prior art because technologies such as Repone K, sodium-chlor, calcium chloride are put forward in the grog leaching after the roasting, and particularly the industrial of spiral leacher is sophisticated, so example only partly provides with roasting, is listed in the table below:
| Routine number | Proportioning | The roasting time branch | Temperature ℃ | Solvable K 2O ％ | Total K 2O ％ | Transformation efficiency % | KCl ％ | The grog loosening degree | ||
| Potassium felspar sand | Alkaline residue | Bittern | ||||||||
| 1 | 1 | 0.5 | 80 | 35 | 900 | 5.40 | 6.80 | 79.41 | 8.57 | Hard slightly, shoulder and can crush with roller |
| 45 | 500～900 | 4.97 | 6.70 | 74.18 | 7.89 | |||||
| 2 | 1 | 1 | 50 | 35 | 900 | 5.53 | 6.85 | 80.73 | 8.78 | |
| 80 | 500～900 | 5.21 | 6.74 | 77.30 | 8.27 | |||||
| 3 | 1 | 1.5 | 70 | 45 | 900 | 5.39 | 6.76 | 79.73 | 8.55 | Loose |
| 60 | 500～900 | 5.28 | 6.67 | 79.16 | 8.39 | |||||
| 4 | 1 | 2 | 10 | 45 | 900 | 5.61 | 6.45 | 86.98 | 8.90 | Porous, loose |
| 5 | 1 | 2.5 | 50 | 900 | 5.41 | 6.87 | 78.75 | 8.59 | Loose | |
| 6 | 1 | 2.7 | 55 | 900 | 5.20 | 6.25 | 83.20 | 8.25 | Loose | |
| 7 | 1 | 2.75 | 30 | 45 | 900 | 5.29 | 6.41 | 82.53 | 8.40 | Loose |
| 8 | 1 | 2.7 | 40 | 65 | 900 | 5.10 | 6.22 | 82.00 | 8.09 | Loose |
| 9 | 1 | 3 | 50 | 48 | 900 | 3.72 | 6.30 | 59.05 | 5.90 | Loose |
| 10 | 1 | 4 | 80 | 900 | 3.02 | 6.23 | 48.49 | 4.79 | Loose | |
| 11 | 1 | 5 | 20 | 70 | 900 | 4.01 | 6.28 | 63.85 | 6.36 | Loose |
| 12 | 1 | 5 | 60 | 900 | 2.93 | 4.52 | 64.82 | 4.65 | Loose | |
| 13 | 1 | 1.8 | 45 | 50 | 900 | 5.38 | 6.32 | 85.13 | 8.54 | Loose |
| 14 | 1 | 2.4 | 70 | 45 | 900 | 5.27 | 6.11 | 86.25 | 8.36 | Loose |
| 15 | 1 | 3 | 90 | 900 | 5.14 | 6.79 | 76.26 | 8.16 | Loose | |
From numerous examples, work as potassium felspar sand as can be seen: alkaline residue=1: 1.6～3.0, stripping K
2O is many, transformation efficiency height, particularly potassium felspar sand: alkaline residue=1: 1.8～2.75, bittern dosage are 10% o'clock of potassium felspar sand weight, stripping K
2O is many, and transformation efficiency up to 86.98%, finds secondly that fixing intensification is better than continuous intensification roasting effect more than 80%, and roasting time selects 35～90 minutes scopes feasible.
Most preferred embodiment
Ratio of components, potassium felspar sand: alkaline residue=1: 2, add the bittern of potassium felspar sand weight 10%, charge pulp stirs evenly with stirring means, analyzes KCl8.15%, 900 ℃ of maturing temperatures, roasting time 45 minutes, grog composition analysis, solvable K
2O5.35%, total K
2O6.59%, transformation efficiency is 81.18%, 85 ℃ of multiple coil leacher leaching temperatures, can reach more than 85% according to calculating leaching rate, press filtration is washed in leaching wash heat, detersive efficiency can reach (analytical data and calculating are slightly) more than 98%, and leaching liquid is put forward 120 ℃ of potassium process evaporation concentration temperature, and centrifugation keeps 100 ℃ of temperature, 30 ℃ of crystallisation by cooling temperature, it is 60% of thick potassium that thick potassium washing adds water, keeps 30 ± 1 ℃ of temperature, stirs 10 minutes, propose crude salt washing in the NaCl process, adding water is 50% of crude salt amount, stirs 10 minutes, 82 ℃ of centrifugations; Carry CaCl
2Process, 125～130 ℃ of filter potassium liquid one-level evaporation concentration (25) controlled temperature that comes out from centrifugation, dual evaporation concentrates 145～155 ℃ of (27) controlled temperature, and the one-level clarification separates 120～125 ℃ of (26) controlled temperature, 168～170 ℃ of three grades of evaporation concentration (29) controlled temperature; Leaching slag plate-and-frame filter press washing and filter pressing, the filtrate after the press filtration return multiple coil leaching operation, and the slag after the press filtration is stored up naturally.
According to material balance, it is 90% Repone K that 8 tons of potassium felspar sands of preresearch estimates and 16 tons of alkaline residues can be produced 1 ton of purity, can increase production 0.50 ton of salt of 1.2 tons of calcium chloride, and leached mud has 12.4 tons approximately.
Claims (3)
1. alkaline residue, the processing method of potassium felspar sand system Repone K, it is characterized in that it is the alkaline residue or wet slag or the waste residue liquid warp pre-carbonization of the direct waste residue liquid that discharges after press filtration of piling up all the year round with the waste residue liquid that discharges in the solvay soda process production soda ash process, wet slag after the press filtration is as raw material and potassium felspar sand batching, with levigated potassium felspar sand (1) and alkaline residue (2) with potassium felspar sand: the ratio of alkaline residue=1: 0.5～5 adds charge pulp operation (3), add the mother liquor of calcium of carrying in the calcium chloride process (31), material stirs through mixing in the charge pulp operation and enters calcining process (7) after trembling evenly, grog after the roasting enters pulverizing process (8), grog after the pulverizing enters leaching operation (9), from the leaching liquid (10) that the leaching operation is come out, collect resultant Repone K, sodium-chlor and calcium chloride can be as the solid slags (39) of engineering earth and building product raw material after washing and filter pressing operation (35) is handled from the leaching slag (34) that the leaching operation is come out.
2. according to the processing method of the described alkaline residue of claim 1, potassium felspar sand system Repone K, it is characterized in that adding in the described proportioning raw materials bittern of selection component potassium felspar sand weight 0～80%.
3. according to the processing method of the described alkaline residue of claim 1, potassium felspar sand system Repone K, the maturing temperature that it is characterized in that described calcining process is 750～900 ℃, and roasting time is 35～90 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99123761A CN1120803C (en) | 1999-11-19 | 1999-11-19 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99123761A CN1120803C (en) | 1999-11-19 | 1999-11-19 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1261601A CN1261601A (en) | 2000-08-02 |
| CN1120803C true CN1120803C (en) | 2003-09-10 |
Family
ID=5282969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99123761A Expired - Fee Related CN1120803C (en) | 1999-11-19 | 1999-11-19 | Process for producing potassium chloride from alkaline slag and potassium feldspar |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831561A (en) * | 2010-04-23 | 2010-09-15 | 华东理工大学 | Method for decomposing potassium feldspar to extract soluble potassium |
| CN101880179B (en) * | 2010-05-28 | 2012-06-27 | 华南理工大学 | Method for preparing potash fertilizer and building material products from white alkali-making mud |
| CN103288102B (en) * | 2013-06-28 | 2015-12-23 | 天津水泥工业设计研究院有限公司 | Method and the device of KCl production potash fertilizer are extracted in roasting water-insoluble potassium ore deposit |
| CN103290234B (en) * | 2013-06-28 | 2015-06-24 | 天津水泥工业设计研究院有限公司 | Method for extracting soluble potassium by utilizing water-insoluble potassium ores |
| CN103664242B (en) * | 2013-09-18 | 2015-07-22 | 薛彦辉 | Caustic sludge treatment method |
| CN106702139B (en) * | 2015-07-28 | 2018-05-22 | 中国科学院过程工程研究所 | A kind of method that sylvite is extracted from water-insoluble potassium bearing rock |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077434A (en) * | 1993-05-14 | 1993-10-20 | 中国石油天然气总公司工程技术研究所 | A kind of method of producing vitriolate of tartar with bittern and Repone K |
| CN1180046A (en) * | 1997-03-13 | 1998-04-29 | 青海盐湖工业集团有限公司 | Process for producing potassium chloride from carnallite |
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1999
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077434A (en) * | 1993-05-14 | 1993-10-20 | 中国石油天然气总公司工程技术研究所 | A kind of method of producing vitriolate of tartar with bittern and Repone K |
| CN1180046A (en) * | 1997-03-13 | 1998-04-29 | 青海盐湖工业集团有限公司 | Process for producing potassium chloride from carnallite |
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| CN1261601A (en) | 2000-08-02 |
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