CN101792166A - Method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag - Google Patents
Method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag Download PDFInfo
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- CN101792166A CN101792166A CN 201010157745 CN201010157745A CN101792166A CN 101792166 A CN101792166 A CN 101792166A CN 201010157745 CN201010157745 CN 201010157745 CN 201010157745 A CN201010157745 A CN 201010157745A CN 101792166 A CN101792166 A CN 101792166A
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- sodium hydroxide
- calcium
- calcium carbonate
- hydroxide
- carbide slag
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Abstract
The invention discloses a method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag. The carbide slag is acidized and purified to obtain pure calcium hydroxide, calcium hydroxide precipitate is remixed into emulsion by using clean water, and then the emulsion reacts with dissolved soda ash to obtain mixed liquid of sodium hydroxide and calcium carbonate; the mixed liquid of sodium hydroxide and calcium carbonate is separated centrifugally to obtain the sodium hydroxide solution and a calcium carbonate wet product; the sodium hydroxide solution is treated by decompression and distillation to obtain sodium hydroxide solution with the concentration of 25 percent; and the calcium carbonate wet product is dried and crushed to obtain a calcium carbonate product. The method changes waste into valuable, consumes large amount of waste slag, protects the environment, has low production cost and simple production process and is a method with larger economic benefit.
Description
Technical field
The present invention relates to the technical field of the comprehensive utilization and the improvement of three industrial wastes, particularly, relate to a kind of method of producing blocky sodium hydroxide and lime carbonate with calcium carbide.
Background technology
Carbide slag is that the resistates that acetylene produced is produced in the calcium carbide hydrolysis, be the emulsion of solid content at 8%-10%, have another name called calcium carbide mud, its main chemical compositions is a calcium hydroxide, also contain the aqueous solution such as solid impurities such as Calucium Silicate powder, calcium aluminate, ferrosilicon and breeze and sulfurated lime, calcium hydroxide, acetylene, being a kind of strong basicity that is, being rich in abundant calcium resource, is that can to produce a series of needs such as lime carbonate, cement calcareous be the product of raw material to raw material with it.But because wherein impurities is more, water content is high, composition is complicated, undressed carbide slag can't directly utilize.On the other hand, flourish along with the calcium carbide industry, the quantity discharged of carbide slag also increases day by day, factory's discharging calcium carbide mud of producing 200,000 tons of PVC year reaches 3,600,000 tons/year, a large amount of carbide slags can't effectively utilize, directly pile up, cause the soil artificially to alkalize, ecotope is caused the pollution that is difficult to recover severe contamination farmland and underground water.
The method of producing sodium hydroxide at present mainly contains two kinds, and the one, causticizing process, this method is a raw material with soda ash (yellow soda ash) solution and lime, makes it that causticizing reaction take place, and generates sodium hydroxide (caustic soda) solution and precipitation of calcium carbonate (lime mud).Behind the insolubless such as elimination precipitation of calcium carbonate, evaporating solns and the sodium hydroxide (caustic soda) of liquid or solid.Precipitation of calcium carbonate can be used as the raw material of cement etc. after washing, the lime carbonate slag of generation can reclaim calcium oxide (unslaked lime) and partial CO 2 through clean, dry, calcining.
Compare with electrolytic process hydrogen manufacturing sodium oxide (caustic soda), because soda ash is the higher raw material of purity, sodium chloride-containing is few, and the purity of gained sodium hydroxide (caustic soda) is also higher.But need to consume another kind of important product soda ash.
Therefore, be necessary to explore the method for new production sodium hydroxide.
Summary of the invention
In order to address the above problem, the invention provides a kind of method of producing blocky sodium hydroxide and lime carbonate with carbide slag, this method turns waste into wealth; consume a large amount of waste residues, protected environment, production cost is low; production process is simple, is a method that has than the large economy benefit.
Technical scheme of the present invention is as follows: a kind of method of producing blocky sodium hydroxide and lime carbonate with carbide slag comprises the steps:
Carbide slag acidified, purification obtains purified calcium hydroxide: carbide slag is modulated into emulsion, put in the reactor (1) with pure substance mass ratio 1: 0.76～1.16 with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride; The mixed solution of carbon dust and calcium chloride suction filtration in first suction filter pump (2) gets clarifying calcium chloride filtrate and carbon dust filter cake; The carbon dust filter cake is used to make carbon dust; Clarifying calcium chloride filtrate and sodium hydroxide solution are 1: 0.52～0.92 to drop in the synthesizer (3) according to the ratio of calcium chloride and sodium hydroxide pure substance quality, stir reaction down, obtain calcium hydroxide precipitation and sodium-chlor mixed solution; Suction filtration in second suction filter pump (4) gets gets clarifying sodium chloride solution and calcium hydroxide precipitation with calcium hydroxide precipitation and sodium-chlor mixed solution;
The calcium hydroxide precipitation is reconciled into emulsion again with clear water, the soda ash good with dissolving is 1: 1.23～1.63 input causticization still (5) linings according to calcium hydroxide and soda ash pure substance mass ratio, carry out chemical reaction under the stirring slowly, temperature of reaction is controlled at 40～50 ℃, reacted 2～5 hours, and obtained the mixing liquid of sodium hydroxide and lime carbonate; The mixing liquid of sodium hydroxide and lime carbonate is centrifugal through whizzer (6), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (7) underpressure distillation, solid sodium hydroxide, solid sodium hydroxide is pulverized and is obtained blocky sodium hydroxide, and blocky sodium hydroxide enters finishing room (8); Calcium carbonate wet product drying machine (9) oven dry, pulverizer (10) is pulverized, and obtains calcium carbonate product.
The chemical principle that aforesaid method relates to is:
Ca(OH)
2+2HCI＝CaCl
2+H
2O
CaCl
2+NaOH＝Ca(OH)
2+2NaCI
Ca(OH)
2+Na
2CO
3＝2NaOH+Ca?CO
3
Method of producing sodium hydroxide and co-producing calcium carbonate with carbide slag of the present invention utilizes the calcareous resource in the carbide slag to produce lime, avoids the pollution of carbide slag to environment, reduces the Wingdale exploitation to environment damage, is a very cost-effective method.
Description of drawings
Fig. 1 is a process flow of producing the method for blocky sodium hydroxide and lime carbonate with carbide slag of the present invention
Journey figure, wherein
1---reactor, 2---first suction filter pump, 3---synthesizer,
4---second suction filter pump, 5---the causticization still, 6---whizzer,
7---vacuum distilling apparatus, 8---finishing room, 9---moisture eliminator,
10---pulverizer.
Embodiment
Below in conjunction with the side of specific embodiment to usefulness carbide slag blocky sodium hydroxide of the present invention and lime carbonate
Method is described further and illustrates.
Embodiment one:
A kind of method of producing blocky sodium hydroxide and lime carbonate with carbide slag, comprise the steps: the acidified of 600kg carbide slag, purification obtains purified calcium hydroxide: carbide slag is modulated into emulsion, put in the reactor (1) with pure substance mass ratio 1: 0.76～1.16 with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride; The mixed solution of carbon dust and calcium chloride suction filtration in first suction filter pump (2) gets clarifying calcium chloride filtrate and carbon dust filter cake; The carbon dust filter cake is used to make carbon dust; Clarifying calcium chloride filtrate and sodium hydroxide solution are 1: 0.52～0.92 to drop in the synthesizer (3) according to the ratio of calcium chloride and sodium hydroxide pure substance quality, stir reaction down, obtain calcium hydroxide precipitation and sodium-chlor mixed solution; Suction filtration in second suction filter pump (4) gets gets clarifying sodium chloride solution and calcium hydroxide precipitation with calcium hydroxide precipitation and sodium-chlor mixed solution;
The calcium hydroxide precipitation is reconciled into emulsion again with clear water, the soda ash good with dissolving is 1: 1.43 input causticization still (5) lining according to calcium hydroxide and soda ash pure substance mass ratio, carry out chemical reaction under the stirring slowly, temperature of reaction is controlled at 40～50 ℃, reacted 3 hours, and obtained the mixing liquid of sodium hydroxide and lime carbonate; The mixing liquid of sodium hydroxide and lime carbonate is centrifugal through whizzer (6), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (7) underpressure distillation, obtain solid sodium hydroxide, solid sodium hydroxide is pulverized and is obtained blocky sodium hydroxide, blocky sodium hydroxide 1438.89kg enters finishing room (8); Calcium carbonate wet product drying machine (9) oven dry, pulverizer (10) is pulverized, and obtains calcium carbonate product 809.44kg.
Embodiment two:
A kind of method of producing blocky sodium hydroxide and lime carbonate with carbide slag, comprise the steps: the acidified of 600kg carbide slag, purification obtains purified calcium hydroxide: carbide slag is modulated into emulsion, put in the reactor (1) with pure substance mass ratio 1: 0.76～1.16 with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride; The mixed solution of carbon dust and calcium chloride suction filtration in first suction filter pump (2) gets clarifying calcium chloride filtrate and carbon dust filter cake; The carbon dust filter cake is used to make carbon dust; Clarifying calcium chloride filtrate and sodium hydroxide solution are 1: 0.52～0.92 to drop in the synthesizer (3) according to the ratio of calcium chloride and sodium hydroxide pure substance quality, stir reaction down, obtain calcium hydroxide precipitation and sodium-chlor mixed solution; Suction filtration in second suction filter pump (4) gets gets clarifying sodium chloride solution and calcium hydroxide precipitation with calcium hydroxide precipitation and sodium-chlor mixed solution;
The calcium hydroxide precipitation is reconciled into emulsion again with clear water, the soda ash good with dissolving is 1: 1.23 input causticization still (5) lining according to calcium hydroxide and soda ash pure substance mass ratio, carry out chemical reaction under the stirring slowly, temperature of reaction is controlled at 40～50 ℃, reacted 3 hours, and obtained the mixing liquid of sodium hydroxide and lime carbonate; The mixing liquid of sodium hydroxide and lime carbonate is centrifugal through whizzer (6), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (7) underpressure distillation, solid sodium hydroxide, solid sodium hydroxide is pulverized and is obtained blocky sodium hydroxide, blocky sodium hydroxide 1237.73kg enters finishing room (8); Calcium carbonate wet product drying machine (9) oven dry, pulverizer (10) is pulverized, and obtains calcium carbonate product 696.22kg.
Embodiment three:
A kind of method of producing blocky sodium hydroxide and lime carbonate with carbide slag, comprise the steps: the acidified of 600kg carbide slag, purification obtains purified calcium hydroxide: carbide slag is modulated into emulsion, put in the reactor (1) with pure substance mass ratio 1: 0.76～1.16 with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride; The mixed solution of carbon dust and calcium chloride suction filtration in first suction filter pump (2) gets clarifying calcium chloride filtrate and carbon dust filter cake; The carbon dust filter cake is used to make carbon dust; Clarifying calcium chloride filtrate and sodium hydroxide solution are 1: 0.52～0.92 to drop in the synthesizer (3) according to the ratio of calcium chloride and sodium hydroxide pure substance quality, stir reaction down, obtain calcium hydroxide precipitation and sodium-chlor mixed solution; Suction filtration in second suction filter pump (4) gets gets clarifying sodium chloride solution and calcium hydroxide precipitation with calcium hydroxide precipitation and sodium-chlor mixed solution;
The calcium hydroxide precipitation is reconciled into emulsion again with clear water, the soda ash good with dissolving is 1: 1.63 input causticization still (5) lining according to calcium hydroxide and soda ash pure substance mass ratio, carry out chemical reaction under the stirring slowly, temperature of reaction is controlled at 40～50 ℃, reacted 3 hours, and obtained the mixing liquid of sodium hydroxide and lime carbonate; The mixing liquid of sodium hydroxide and lime carbonate is centrifugal through whizzer (6), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (7) underpressure distillation, obtain solid sodium hydroxide, solid sodium hydroxide is pulverized and is obtained blocky sodium hydroxide, blocky sodium hydroxide 1153.15kg enters finishing room (8); Calcium carbonate wet product drying machine (9) oven dry, pulverizer (10) is pulverized, and obtains calcium carbonate product 810.82kg.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (1)
1. a method of producing blocky sodium hydroxide and lime carbonate with carbide slag is characterized in that, comprises the steps:
Carbide slag acidified, purification obtains purified calcium hydroxide: carbide slag is modulated into emulsion, put in the reactor (1) with pure substance mass ratio 1: 0.76～1.16 with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride; The mixed solution of carbon dust and calcium chloride suction filtration in first suction filter pump (2) gets clarifying calcium chloride filtrate and carbon dust filter cake; The carbon dust filter cake is used to make carbon dust; Clarifying calcium chloride filtrate and sodium hydroxide solution are 1: 0.52～0.92 to drop in the synthesizer (3) according to the ratio of calcium chloride and sodium hydroxide pure substance quality, stir reaction down, obtain calcium hydroxide precipitation and sodium-chlor mixed solution; Suction filtration in second suction filter pump (4) gets gets clarifying sodium chloride solution and calcium hydroxide precipitation with calcium hydroxide precipitation and sodium-chlor mixed solution;
The calcium hydroxide precipitation is reconciled into emulsion again with clear water, the soda ash good with dissolving is 1: 1.23～1.63 input causticization still (5) linings according to calcium hydroxide and soda ash pure substance mass ratio, carry out chemical reaction under the stirring slowly, temperature of reaction is controlled at 40～50 ℃, reacted 2～5 hours, and obtained the mixing liquid of sodium hydroxide and lime carbonate; The mixing liquid of sodium hydroxide and lime carbonate is centrifugal through whizzer (6), obtain sodium hydroxide solution and calcium carbonate wet product after the separation, sodium hydroxide solution is through vacuum distilling apparatus (7) underpressure distillation, obtain solid sodium hydroxide, solid sodium hydroxide is pulverized and is obtained blocky sodium hydroxide, and blocky sodium hydroxide enters finishing room (8); Calcium carbonate wet product drying machine (9) oven dry, pulverizer (10) is pulverized, and obtains calcium carbonate product.
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| CN 201010157745 CN101792166A (en) | 2009-07-17 | 2010-03-24 | Method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag |
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| CN200910041209.1 | 2009-07-17 | ||
| CN 201010157745 CN101792166A (en) | 2009-07-17 | 2010-03-24 | Method for producing blocky sodium hydroxide and calcium carbonate by using carbide slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079536A (en) * | 2010-12-03 | 2011-06-01 | 桐柏兴源化工有限公司 | Method for producing caustic soda and papermaking filler calcium carbonate by using natural alkali liquor |
| CN106458626A (en) * | 2014-09-30 | 2017-02-22 | 株式会社Gc | Method for producing calcium carbonate blocks |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113884A (en) * | 1994-06-01 | 1995-12-27 | 门伟 | Producing method for caustic soda |
| CN101439847A (en) * | 2008-12-18 | 2009-05-27 | 王嘉兴 | Method for coproduction of bleaching powder and active carbon as well as chlorine-containing compound from carbide slag |
| CN101456026A (en) * | 2008-12-18 | 2009-06-17 | 王嘉兴 | Material circulation system formed by waste carbide mud residue and alkali-chloride industry |
| CN101648718A (en) * | 2009-07-17 | 2010-02-17 | 王嘉兴 | Method for producing massive sodium hydroxide and co-producing high-grade calcium carbonate by using carbide slags |
-
2010
- 2010-03-24 CN CN 201010157745 patent/CN101792166A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1113884A (en) * | 1994-06-01 | 1995-12-27 | 门伟 | Producing method for caustic soda |
| CN101439847A (en) * | 2008-12-18 | 2009-05-27 | 王嘉兴 | Method for coproduction of bleaching powder and active carbon as well as chlorine-containing compound from carbide slag |
| CN101456026A (en) * | 2008-12-18 | 2009-06-17 | 王嘉兴 | Material circulation system formed by waste carbide mud residue and alkali-chloride industry |
| CN101648718A (en) * | 2009-07-17 | 2010-02-17 | 王嘉兴 | Method for producing massive sodium hydroxide and co-producing high-grade calcium carbonate by using carbide slags |
Non-Patent Citations (1)
| Title |
|---|
| 《中国粉体技术》 20050228 乔叶刚 用电石废渣制备纳米碳酸钙的研究 39-41 1 第11卷, 第1期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079536A (en) * | 2010-12-03 | 2011-06-01 | 桐柏兴源化工有限公司 | Method for producing caustic soda and papermaking filler calcium carbonate by using natural alkali liquor |
| CN102079536B (en) * | 2010-12-03 | 2012-10-10 | 桐柏兴源化工有限公司 | Method for producing caustic soda and papermaking filler calcium carbonate by using natural alkali liquor |
| CN106458626A (en) * | 2014-09-30 | 2017-02-22 | 株式会社Gc | Method for producing calcium carbonate blocks |
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Application publication date: 20100804 |