CN102115133A - Method for producing calcium nitrate by carbide slag - Google Patents
Method for producing calcium nitrate by carbide slag Download PDFInfo
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- CN102115133A CN102115133A CN201010615521XA CN201010615521A CN102115133A CN 102115133 A CN102115133 A CN 102115133A CN 201010615521X A CN201010615521X A CN 201010615521XA CN 201010615521 A CN201010615521 A CN 201010615521A CN 102115133 A CN102115133 A CN 102115133A
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- calcium
- carbide slag
- filter cake
- nitrocalcite
- calcium carbonate
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Abstract
The invention provides a method for producing calcium nitrate by carbide slag, which comprises the steps of: grinding the carbide slag into coarse powders with 80-100 meshes, putting the coarse powders into a reactor to be abundantly mixed with the water, putting the excessive hydrochloric acid into a reactor, converting oxide in the carbide slag into soluble chloride, and filtering a reaction product to obtain filter liquor which takes calcium chloride as a main part; reacting the filter liquor which takes the calcium chloride as the main part with excessive carbonic acid solution, combining calcium ions with carbonate ions into calcium carbonate to be precipitated, and filtering to obtain a calcium carbonate filter cake, and reacting the calcium carbonate filter cake with hydrogen nitrate solution to obtain calcium nitrate precipitate and carbon acid solution mixture; and separating the calcium nitrate precipitate from the carbon acid solution mixture in a filtering way to obtain the carbonic acid filter liquor and the calcium carbonate filter cake, and drying and smashing the calcium carbonate filter cake to obtain a calcium carbonate product. The method is simple in operation and small in equipment investment, and the obtained calcium nitrate product is high in purity and 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 nitrocalcite 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 nitrocalcite 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 nitrocalcite 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 nitric acid reaction, obtain the mixture of nitrocalcite precipitation and carbonic acid soln again; The nitrocalcite precipitation is separated after filtration with the mixture of carbonic acid soln, obtains carbonic acid and considers liquid and nitrocalcite filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And nitrocalcite filter cake drying, pulverizing obtain the nitrocalcite product.
Method of producing nitrocalcite 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 nitrocalcite 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 nitric acid reaction, obtain the mixture of nitrocalcite precipitation and carbonic acid soln again; The nitrocalcite precipitation is separated after filtration with the mixture of carbonic acid soln, obtains carbonic acid and considers liquid and nitrocalcite filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And nitrocalcite filter cake drying, pulverizing obtain the nitrocalcite 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 nitrocalcite 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 nitric acid reaction, obtain the mixture of nitrocalcite precipitation and carbonic acid soln again; The nitrocalcite precipitation is separated after filtration with the mixture of carbonic acid soln, obtains carbonic acid and considers liquid and nitrocalcite filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And nitrocalcite filter cake drying, pulverizing obtain the nitrocalcite product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010615521XA CN102115133A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium nitrate by carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010615521XA CN102115133A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium nitrate by carbide slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115133A true CN102115133A (en) | 2011-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010615521XA Pending CN102115133A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium nitrate by carbide slag |
Country Status (1)
| Country | Link |
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| CN (1) | CN102115133A (en) |
Cited By (3)
| 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 |
| CN106629805A (en) * | 2016-10-17 | 2017-05-10 | 交城县三喜化工有限公司 | Method and device for producing calcium nitrate liquid |
| RU2680036C2 (en) * | 2014-06-23 | 2019-02-14 | Яра Интернэшнл Аса | Method for producing anhydrous calcium nitrate powder |
-
2010
- 2010-12-31 CN CN201010615521XA patent/CN102115133A/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 |
| RU2680036C2 (en) * | 2014-06-23 | 2019-02-14 | Яра Интернэшнл Аса | Method for producing anhydrous calcium nitrate powder |
| CN106629805A (en) * | 2016-10-17 | 2017-05-10 | 交城县三喜化工有限公司 | Method and device for producing calcium nitrate liquid |
| CN106629805B (en) * | 2016-10-17 | 2017-11-21 | 交城县三喜化工有限公司 | A kind of method and its device for producing calcium nitrate liquid |
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Application publication date: 20110706 |