CN102115143A - Method for producing calcium sulfate from carbide slag - Google Patents
Method for producing calcium sulfate from carbide slag Download PDFInfo
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- CN102115143A CN102115143A CN201010615507XA CN201010615507A CN102115143A CN 102115143 A CN102115143 A CN 102115143A CN 201010615507X A CN201010615507X A CN 201010615507XA CN 201010615507 A CN201010615507 A CN 201010615507A CN 102115143 A CN102115143 A CN 102115143A
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- calcium
- calcium sulfate
- carbide slag
- filter cake
- filtrate
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Abstract
The invention provides a method for producing calcium sulfate from carbide slag. The method comprises the following steps: the carbide slag is milled to form coarse powders of 80 meshes to 100 meshes, the coarse powders are thoroughly mixed with water in a reactor, then an excessive amount of hydrochloric acid is fed to the reactor so that the oxides in the carbide slag are changed into soluble chlorides, and the reaction product is filtered to produce a filtrate mainly containing calcium chloride; the filtrate mainly containing calcium chloride reacts with an excessive amount of carbonic acid solution, the calcium ions bond with carbonate ions to produce calcium carbonate precipitates, the calcium carbonate precipitates are filtered to produce a filter cake of calcium carbonate, and then the filter cake of calcium carbonate reacts with sulfuric acid to produce a mixture of calcium sulfate precipitates and carbonic acid solution; and the mixture of calcium sulfate precipitates and carbonic acid solution is filtered and separated to produce a filtrate of carbonic acid and a filter cake of calcium sulfate, and the filter cake of calcium sulfate is dried and pulverized to obtain a calcium sulfate product. The method is easy to operate and reduces the equipment investment. The calcium sulfate product has a high purity and a great economic value.
Description
Technical field
The present invention relates to carbide slag comprehensive utilization technique field, particularly, relate to a kind of method of producing calcium sulfate with carbide slag.
Background technology
Carbide slag is mainly derived from generated by polyvinyl chloride by calcium carbide and vinyl acetate between to for plastic production.About 1.45 tons of 1 ton of polyvinyl chloride power consumption of every production stone produces carbide slag more than 1 ton, so 1 ton of polyvinyl chloride of every production need be discharged carbide slag more than 2 tons after the calcium carbide hydrolysis per ton.Carbide slag quantity is big, and the alkalinity height contains objectionable impuritiess such as sulphur, arsenic again, and not treated discharging can be stopped up water drain, stops up long-pending riverbed, the harm fish production.Stack then land occupation, contaminate environment on land.
Carbide slag mainly consist of calcium oxide, its content accounts for more than 50%, also contains small amounts magnesium, aluminium sesquioxide, ferric oxide and silicon-dioxide.At present, carbide slag be mainly used in make cement and and material of construction, it is effectively put into composition and is not fully utilized.
Summary of the invention
Carbide slag mainly consist of calcium oxide, its content accounts for more than 50%, also contain small amounts magnesium, aluminium sesquioxide, ferric oxide and silicon-dioxide, in order to make full use of carbide slag, the application provides a kind of method of producing calcium sulfate with carbide slag, and this method is effectively extracted the calcium that contains in the carbide slag, for the industrial application of carbide slag provides new approach, and method is simple, and facility investment is few, is a method that is worthy of popularization.
The application's technical scheme is as follows: a kind of method of producing calcium sulfate with carbide slag, comprise the steps: carbide slag is worn into 80-100 purpose meal, place reactor and water thorough mixing, then in reactor, drop into excessive hydrochloric acid, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, and the filtering reaction product, obtain containing filtrate, also contain a spot of aluminum chloride and iron(ic) chloride in the filtrate based on calcium chloride; Will be based on the filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, yet, because under water surrounding, can not obtain iron carbonate, and also very easily hydrolysis of aluminium carbonate separates with magnesium ion calcium ion with the form of precipitation of calcium carbonate thus with aluminum ion, after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and sulfuric acid reaction, obtain the mixture of calcium sulfate precipitation and carbonic acid soln again; The mixture of calcium sulfate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium sulfate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium sulfate filter cake drying, pulverizing obtain the calcium sulfate product.
Method of producing calcium sulfate with carbide slag of the present invention is effectively extracted the calcium that contains in the carbide slag, and for the industrial application of carbide slag provides new approach, and method is simple, and facility investment is few, is a method that is worthy of popularization.
Embodiment
Embodiment 1:
A kind of method of producing lime carbonate with carbide slag, the 500kg carbide slag is worn into 80-100 purpose meal, place reactor and 500kg water thorough mixing, then in reactor, drop into excessive hydrochloric acid, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, and the filtering reaction product, obtain containing filtrate, also contain a spot of aluminum chloride and iron(ic) chloride in the filtrate based on calcium chloride; Will be based on the filtrate filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, and after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and sulfuric acid reaction, obtain the mixture of calcium sulfate precipitation and carbonic acid soln again; The mixture of calcium sulfate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium sulfate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium sulfate filter cake drying, pulverizing obtain the calcium sulfate product.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (1)
1. method of producing lime carbonate with carbide slag, it is characterized in that, comprise the steps: carbide slag is worn into 80-100 purpose meal, place reactor and water thorough mixing, then drop into excessive hydrochloric acid in reactor, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, the filtering reaction product obtains containing the filtrate based on calcium chloride, also contains a spot of aluminum chloride and iron(ic) chloride in the filtrate; Will be based on the filtrate filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, and after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and sulfuric acid reaction, obtain the mixture of calcium sulfate precipitation and carbonic acid soln again; The mixture of calcium sulfate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium sulfate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium sulfate filter cake drying, pulverizing obtain the calcium sulfate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010615507XA CN102115143A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium sulfate from carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010615507XA CN102115143A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium sulfate from carbide slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115143A true CN102115143A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010615507XA Pending CN102115143A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium sulfate from carbide slag |
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| CN (1) | CN102115143A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923751A (en) * | 2012-11-06 | 2013-02-13 | 荣殿相 | Method for producing plaster fiber by using carbide slurry |
| CN105645453A (en) * | 2015-12-14 | 2016-06-08 | 河南开祥精细化工有限公司 | Method for disposing industrial waste sulfuric acid by utilizing carbide slag |
| CN107055586A (en) * | 2016-12-30 | 2017-08-18 | 宁夏东吴农化有限公司 | A kind of preparation method of calcium sulfate |
| CN107244867A (en) * | 2017-05-31 | 2017-10-13 | 安徽华塑股份有限公司 | A kind of method that sulfur waste acid treatment waste residue produces gypsum |
-
2010
- 2010-12-31 CN CN201010615507XA patent/CN102115143A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923751A (en) * | 2012-11-06 | 2013-02-13 | 荣殿相 | Method for producing plaster fiber by using carbide slurry |
| CN102923751B (en) * | 2012-11-06 | 2017-04-19 | 荣殿相 | Method for producing plaster fiber by using carbide slurry |
| CN105645453A (en) * | 2015-12-14 | 2016-06-08 | 河南开祥精细化工有限公司 | Method for disposing industrial waste sulfuric acid by utilizing carbide slag |
| CN107055586A (en) * | 2016-12-30 | 2017-08-18 | 宁夏东吴农化有限公司 | A kind of preparation method of calcium sulfate |
| CN107244867A (en) * | 2017-05-31 | 2017-10-13 | 安徽华塑股份有限公司 | A kind of method that sulfur waste acid treatment waste residue produces gypsum |
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Application publication date: 20110706 |