CN101805004A - Method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag - Google Patents
Method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag Download PDFInfo
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- CN101805004A CN101805004A CN 201010157768 CN201010157768A CN101805004A CN 101805004 A CN101805004 A CN 101805004A CN 201010157768 CN201010157768 CN 201010157768 CN 201010157768 A CN201010157768 A CN 201010157768A CN 101805004 A CN101805004 A CN 101805004A
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Abstract
本发明公开了一种用电石渣生产氢氧化钙联产工业盐和碳粉的方法，将电石渣调制成乳浊液，与稀盐酸进行化学反应，得到碳粉和氯化钙的混合液；分离碳粉和氯化钙混合液得到碳粉滤饼和氯化钙滤液，并将氯化钙滤液与氢氧化钠溶液反应，得到氢氧化钙沉淀和氯化钠混合液；分离氢氧化钙沉淀和氯化钠溶液，将氢氧化钙经洗涤离心机洗涤离心、蒸馏器干燥、粉碎机粉碎，包装得到优质的氢氧化钙。该方法，利用电石渣中的钙质资源生产石灰，避免电石渣对环境的污染，减少石灰石开采对环境的破坏，还联产工业盐和碳粉，将是一个十分经济有效的方法。
The invention discloses a method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag, wherein the carbide slag is modulated into an emulsion, and chemically reacted with dilute hydrochloric acid to obtain a mixed solution of carbon powder and calcium chloride; the carbon powder and the mixed solution of calcium chloride are separated to obtain a carbon powder filter cake and a calcium chloride filtrate, and the calcium chloride filtrate is reacted with a sodium hydroxide solution to obtain a calcium hydroxide precipitate and a sodium chloride mixed solution; the calcium hydroxide precipitate and the sodium chloride solution are separated, and the calcium hydroxide is washed and centrifuged by a washing centrifuge, dried by a distiller, crushed by a pulverizer, and packaged to obtain high-quality calcium hydroxide. The method utilizes the calcium resources in the carbide slag to produce lime, avoids the pollution of the carbide slag to the environment, reduces the damage to the environment by limestone mining, and also co-produces industrial salt and carbon powder, which is a very economical and effective method.
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 calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag.
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.
Meanwhile, the demand of lime is growing, Steel Plant, cement mill and thermal power plant need a large amount of lime, at present, industrial production lime is to utilize the Wingdale calcination to become calcium oxide, and water digestion forms again, the annual billions of tons of Wingdales of exploitation that need, the a large amount of heat energy of its production process consumption also destroy ecotope.
On the other hand, Industrial Salt is to form through chemical reaction or seawater airing post crystallization with ore, also is to adopt primary ore as base-material, and the operating equipment heaviness is huge, and cost is higher.
Therefore, how to utilize the calcareous resource in the carbide slag to produce lime, satisfy the growth of lime demand, avoid the pollution of carbide slag to environment, reducing the Wingdale exploitation is to await the further difficult problem of exploration to environment damage.If the calcareous resource in utilizing carbide slag is produced in the lime, also the coproduction Industrial Salt will be a very cost-effective method.
Summary of the invention
In order to address the above problem, the invention provides a kind of method of producing calcium hydroxide coproduction Industrial Salt and carbon dust 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 calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag, comprise the steps: 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: 0.52～0.72 to drop in the synthesizer (5) 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 the 3rd suction filter pump (6) gets gets clarifying sodium chloride solution and calcium hydroxide filter cake with calcium hydroxide precipitation and sodium-chlor mixed solution; The calcium hydroxide filter cake is centrifugal through washing whizzer (7) washing, distiller (8) dry, pulverizer (10) is pulverized, and is packaged to be fine calcium hydroxide product (15).
Described carbon dust filter cake and excessive hydrochloric acid be excessive response in carbon dust cleaner (3), remove the carbide slag that the inside does not have complete reaction, obtain purified carbon dust through second suction filter pump (4) suction filtration, described purified carbon dust through dehydration, dry in carbon dust loft drier (12), is crushed into carbon dust product (17) again in the carbon dust pulverizer (13).
Above-mentioned clarification sodium chloride solution is through underpressure distillation device (9) underpressure distillation, and crystallizer (11) crystallization is packaged to be purified Industrial Salt (16).
The chemical principle that aforesaid method relates to is:
Ca(OH)
2+C+2HCI＝CaCl
2+2H
2O+C
CaCl
2+2NaOH＝Ca(OH)
2+2NaCI
The method of making calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag of the present invention, utilize the calcareous resource in the carbide slag to produce lime, avoid the pollution of carbide slag to environment, reduce the Wingdale exploitation to environment damage, also coproduction Industrial Salt and carbon dust will be very cost-effective methods.。
Description of drawings
Fig. 1 of the present inventionly produces the process flow sheet of the method for calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag, wherein
1---cleaner, 2---first suction filter pump, 3---the carbon dust cleaner,
4---second suction filter pump, 5---synthesizer, 6---the 3rd suction filter pump,
7---the washing whizzer, 8---distiller, 9---the washing whizzer,
10---crystallizer, 11---moisture eliminator, 12---pulverizer,
13---the carbon dust loft drier, 14---the carbon dust pulverizer, 15---the calcium hydroxide product
16---Industrial Salt, 17---the carbon dust product.
Embodiment
Below in conjunction with specific embodiment the method with carbide slag production calcium hydroxide coproduction Industrial Salt and carbon dust of the present invention is described further and illustrates.
Embodiment one
A kind of method of producing calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag, comprise the steps: the 800kg carbide slag is modulated into emulsion, put at 1: 0.76 in the reactor (1) with the pure substance mass ratio with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride, wherein, the quality of calcium chloride is 950.54kg; Suction filtration gets clarifying calcium chloride filtrate and carbon dust filter cake in the mixed solution of carbon dust and calcium chloride, first suction filter pump (2); Clarifying calcium chloride filtrate and sodium hydroxide solution are to drop in synthesizer (5) at 1: 0.52 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 the 3rd suction filter pump (6) gets gets clarifying sodium chloride solution and calcium hydroxide filter cake with calcium hydroxide precipitation and sodium-chlor mixed solution; The calcium hydroxide filter cake is centrifugal through washing whizzer (7) washing, distiller (8) dry, pulverizer (10) is pulverized, and is packaged to be fine calcium hydroxide product (15), and wherein, the pure substance quality of calcium hydroxide is 457.21kg.
Described carbon dust filter cake and excessive hydrochloric acid be excessive response in carbon dust cleaner (3), removing the inside does not have the carbide slag of complete reaction, obtain purified carbon dust through second suction filter pump (4) suction filtration, again through dehydration, dry in carbon dust loft drier (12), be crushed into carbon dust product (17) in the carbon dust pulverizer (13), wherein the quality of carbon dust is 48kg.
Above-mentioned clarification sodium chloride solution is through underpressure distillation device (9) underpressure distillation, and crystallizer (11) crystallization is packaged to be purified Industrial Salt (16), and wherein the quality of Industrial Salt is 722.88kg.
Embodiment two:
A kind of method of producing calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag, comprise the steps: the 800kg carbide slag is modulated into emulsion, put at 1: 1.16 in the reactor (1) with the pure substance mass ratio with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride, wherein, the quality of calcium chloride is 950.54kg; 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, clarifying calcium chloride filtrate and sodium hydroxide solution are to drop in synthesizer (5) at 1: 0.72 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 the 3rd suction filter pump (6) gets gets clarifying sodium chloride solution and calcium hydroxide filter cake with calcium hydroxide precipitation and sodium-chlor mixed solution; The calcium hydroxide filter cake is centrifugal through washing whizzer (7) washing, distiller (8) dry, pulverizer (10) is pulverized, and is packaged to be fine calcium hydroxide product (15), and wherein, the quality of calcium hydroxide is 633.69kg.
Described carbon dust filter cake and excessive hydrochloric acid be excessive response in carbon dust cleaner (3), removing the inside does not have the carbide slag of complete reaction, obtain purified carbon dust through second suction filter pump (4) suction filtration, again through dehydration, dry in carbon dust loft drier (12), be crushed into carbon dust product (17) in the carbon dust pulverizer (13), wherein the quality of carbon dust is 48kg.
Above-mentioned clarification sodium chloride solution is through underpressure distillation device (9) underpressure distillation, and crystallizer (11) crystallization is packaged to be purified Industrial Salt (16), and wherein the quality of Industrial Salt is 1001.92kg.
Embodiment three:
A kind of method of producing calcium hydroxide coproduction Industrial Salt and carbon dust with carbide slag, comprise the steps: the 800kg carbide slag is modulated into emulsion, put at 1: 0.96 in the reactor (1) with the pure substance mass ratio with dilute hydrochloric acid, under agitation carry out chemical reaction, obtain the mixed solution of carbon dust and calcium chloride, wherein, the quality of calcium chloride is 1200.68kg; 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; Clarifying calcium chloride filtrate and sodium hydroxide solution are to drop in synthesizer (5) at 1: 0.62 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 the 3rd suction filter pump (6) gets gets clarifying sodium chloride solution and calcium hydroxide filter cake with calcium hydroxide precipitation and sodium-chlor mixed solution; The calcium hydroxide filter cake is centrifugal through washing whizzer (7) washing, distiller (8) dry, pulverizer (10) is pulverized, and is packaged to be fine calcium hydroxide product (15), and wherein, the quality of calcium hydroxide is 688.59kg.
Described carbon dust filter cake and excessive hydrochloric acid be excessive response in carbon dust cleaner (3), removing the inside does not have the carbide slag of complete reaction, obtain purified carbon dust through second suction filter pump (4) suction filtration, again through dehydration, dry in carbon dust loft drier (12), be crushed into carbon dust product (17) in the carbon dust pulverizer (13), wherein the quality of carbon dust is 48kg.
Above-mentioned clarification sodium chloride solution is through underpressure distillation device (9) underpressure distillation, and crystallizer (11) crystallization is packaged to be purified Industrial Salt (16), and wherein the quality of Industrial Salt is 1088.71kg.
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 (4)
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| CN200910040051.6 | 2009-06-08 | ||
| CN 201010157768 CN101805004A (en) | 2009-06-08 | 2010-03-24 | Method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126989A (en) * | 2010-12-31 | 2011-07-20 | 张胜勇 | A kind of method utilizing dicyandiamide waste residue to prepare dicyandiamide, sodium chloride and charcoal |
| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Device and method for preparing high-activity slaked lime by using carbide slag and caustic sludge |
| CN104229854A (en) * | 2014-10-08 | 2014-12-24 | 攀枝花钢企欣宇化工有限公司 | Calcium chloride solution producing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2010
- 2010-03-24 CN CN 201010157768 patent/CN101805004A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126989A (en) * | 2010-12-31 | 2011-07-20 | 张胜勇 | A kind of method utilizing dicyandiamide waste residue to prepare dicyandiamide, sodium chloride and charcoal |
| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Device and method for preparing high-activity slaked lime by using carbide slag and caustic sludge |
| CN104229854A (en) * | 2014-10-08 | 2014-12-24 | 攀枝花钢企欣宇化工有限公司 | Calcium chloride solution producing method |
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Open date: 20100818 |