CN102115142A - Method for producing industrial calcium sulfate by producing ardealite - Google Patents
Method for producing industrial calcium sulfate by producing ardealite Download PDFInfo
- Publication number
- CN102115142A CN102115142A CN2010106154965A CN201010615496A CN102115142A CN 102115142 A CN102115142 A CN 102115142A CN 2010106154965 A CN2010106154965 A CN 2010106154965A CN 201010615496 A CN201010615496 A CN 201010615496A CN 102115142 A CN102115142 A CN 102115142A
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- China
- Prior art keywords
- calcium sulfate
- phosphogypsum
- filter residue
- ardealite
- water
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention provides a method for producing industrial calcium sulfate by producing ardealite. The method comprises the following specific steps of: smashing ardealite into coarse powders with 80-100 meshes, putting the coarse powders into a reactor to be adequately mixed with the water, dissolving soluble impurity in the ardealite into the water, and filtering, wherein the filter residue contains the impurity which can not be dissolved in the water and mainly comprises calcium sulfate, calcium phosphate and a small quantity of the other insoluble impurity; reacting the filtering liquor with the excessive hydrochloric acid, and refiltering reactant to obtain the filtering liquor and the filter residue which mainly comprises the calcium sulfate; and washing, drying and smashing the filter residue which mainly comprises the calcium sulfate to obtain an industrial calcium sulfate product. The method can effectively extract the calcium sulfate in the ardealite and can offer a new approach for the industrial application of the ardealite.
Description
Technical field
The present invention relates to phosphogypsum, particularly, relate to a kind of method of utilizing phosphogypsum production manufacture calcium sulfate.
Background technology
Phosphogypsum is meant in phosphoric acid production, the solid slag that produces during with sulfuric acid treating phosphorite, and its main component is a calcium sulfate.Contain multiple other impurity in addition, as insoluble impurities: as the phosphoric acid salt and the vitriol of quartz, undecomposed phosphatic rock, fluorochemical and fluorine, aluminium, magnesium; Soluble impurity: as water-soluble P
2O
5, fluorochemical that solubleness is lower and vitriol.In addition, also contain arsenic, copper, zinc, iron, manganese, lead, cadmium, mercury and radioelement in the phosphogypsum, equal trace extremely, and great majority are insoluble solid, its hazardness can be ignored.Institute's fluoride, free phosphoric acid, P in the phosphogypsum
2O
5, impurity such as phosphoric acid salt is to cause phosphogypsum to cause the principal element of environmental pollution in the process of storing up.The improvement of phosphogypsum and to utilize problem be a global difficult problem.
China is as first production of phosphate fertilizer state in the world, also is simultaneously first phosphogypsum by-product state.According to incompletely statistics, the domestic phosphogypsum slag of storing up reaches more than 100,000,000 ton at present, also will newly produce tens million of tons every year.Because the phosphogypsum generation is huge, the market capacity of phosphogypsum comprehensive utilization product is limited, also can't accomplish in a short time phosphogypsum is all utilized, and can only adopt air storage to handle.Storing up in a large number of phosphogypsum, injustice has been occupied land resources, has caused the pollution of atmosphere, water system and soil owing to wind erosion, weathering.The Long contact time phosphogypsum may cause people's death or pathology certainly.
For this reason, be necessary to explore the industry application method thereof of phosphogypsum, give full play to its potential economic worth.
Summary of the invention
For this reason, the application provides a kind of method of utilizing phosphogypsum production manufacture calcium sulfate, and this method is effectively extracted the calcium sulfate in the phosphogypsum, for the industrial application of phosphogypsum provides new approach.
The main component of phosphogypsum is a calcium sulfate, contains multiple other impurity in addition, as insoluble impurities: the phosphoric acid salt and the vitriol of quartzy, undecomposed phosphatic rock, fluorochemical and fluorine, aluminium, magnesium; Soluble impurity: as P
2O
5, fluorochemical that solubleness is lower and vitriol.
The application's technical scheme is as follows: a kind of method of utilizing phosphogypsum manufacture calcium sulfate, this method comprises following concrete steps: it is 80-100 purpose meal that phosphogypsum is pulverized, place reactor and water thorough mixing, make the water-soluble after-filtration of soluble impurity in the phosphogypsum, be water-fast impurity in the filter residue, it mainly contains calcium sulfate, calcium phosphate, and the phosphoric acid salt of a spot of other insoluble impuritiess such as fluorochemical and fluorine, aluminium, magnesium and vitriol etc.; With filter residue and excessive hydrochloric acid reaction, at this moment, insoluble calcium phosphate is converted to the phosphoric acid and the calcium chloride of solubility, and the phosphoric acid salt of insoluble fluorine, aluminium, magnesium also is converted to the phosphoric acid and the muriate of solubility; Reactant refilters, and obtains the filter residue of filtrate and main sulfur acid calcium and a small amount of vitriol; The filter residue of the main sulfur acid calcium of gained and a small amount of vitriol promptly obtains the industrial sulphuric acid calcium product through washing, crushed after being dried.
The method of utilizing phosphogypsum production manufacture calcium sulfate of the present invention, this method is effectively extracted the calcium sulfate in the phosphogypsum, for the industrial application of phosphogypsum provides new approach.
Embodiment
Embodiment 1:
A kind of method of utilizing phosphogypsum manufacture calcium sulfate, this method comprises following concrete steps: weighing phosphogypsum 500kg, it is 80-100 purpose meal that phosphogypsum is pulverized, place reactor and 500kg water thorough mixing, make the water-soluble after-filtration of soluble impurity in the phosphogypsum, be water-fast impurity in the filter residue, it mainly contains calcium sulfate, calcium phosphate, and a spot of other insoluble impuritiess; With filter residue and excessive hydrochloric acid reaction, reactant refilters, and obtains the filter residue of filtrate and main sulfur acid calcium; The filter residue of the main sulfur acid calcium of gained promptly obtains the industrial sulphuric acid calcium product through washing, crushed after being dried.
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 utilizing phosphogypsum manufacture calcium sulfate, it is characterized in that, this method comprises following concrete steps: it is 80-100 purpose meal that phosphogypsum is pulverized, place reactor and water thorough mixing, make the water-soluble after-filtration of soluble impurity in the phosphogypsum, be water-fast impurity in the filter residue, it mainly contains calcium sulfate, calcium phosphate, and a spot of other insoluble impuritiess; With filter residue and excessive hydrochloric acid reaction, reactant refilters, and obtains the filter residue of filtrate and main sulfur acid calcium; The filter residue of the main sulfur acid calcium of gained promptly obtains the industrial sulphuric acid calcium product through washing, crushed after being dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106154965A CN102115142A (en) | 2010-12-31 | 2010-12-31 | Method for producing industrial calcium sulfate by producing ardealite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106154965A CN102115142A (en) | 2010-12-31 | 2010-12-31 | Method for producing industrial calcium sulfate by producing ardealite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115142A true CN102115142A (en) | 2011-07-06 |
Family
ID=44214085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106154965A Pending CN102115142A (en) | 2010-12-31 | 2010-12-31 | Method for producing industrial calcium sulfate by producing ardealite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102115142A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005086A (en) * | 2014-04-04 | 2014-08-27 | 贵阳中化开磷化肥有限公司 | Method for preparing calcium sulfate dihydrate crystal whisker from phosphorus gypsum |
| CN106698497A (en) * | 2017-01-22 | 2017-05-24 | 武汉工程大学 | Method for preparing calcium sulfate from ardealite |
| CN109485281A (en) * | 2018-12-29 | 2019-03-19 | 四川绵竹市盘龙矿物质有限责任公司 | A kind of method of ardealite online production building material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699638A (en) * | 2004-05-18 | 2005-11-23 | 青海海兴科技开发有限公司 | Process for preparing calcium sulfate crystal whisker material |
| CN101311355A (en) * | 2008-04-24 | 2008-11-26 | 云南民族大学 | Process for preparing calcium sulphate whiskers from ardealite |
| CN101792932A (en) * | 2009-11-16 | 2010-08-04 | 瓮福（集团）有限责任公司 | Method for preparing ultra-fine calcium sulfate crystal whisker by using phosphogypsum |
-
2010
- 2010-12-31 CN CN2010106154965A patent/CN102115142A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699638A (en) * | 2004-05-18 | 2005-11-23 | 青海海兴科技开发有限公司 | Process for preparing calcium sulfate crystal whisker material |
| CN101311355A (en) * | 2008-04-24 | 2008-11-26 | 云南民族大学 | Process for preparing calcium sulphate whiskers from ardealite |
| CN101792932A (en) * | 2009-11-16 | 2010-08-04 | 瓮福（集团）有限责任公司 | Method for preparing ultra-fine calcium sulfate crystal whisker by using phosphogypsum |
Non-Patent Citations (1)
| Title |
|---|
| 崔益顺: "磷石膏制备硫酸钙晶须的研究", 《无机盐工业》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005086A (en) * | 2014-04-04 | 2014-08-27 | 贵阳中化开磷化肥有限公司 | Method for preparing calcium sulfate dihydrate crystal whisker from phosphorus gypsum |
| CN104005086B (en) * | 2014-04-04 | 2016-08-17 | 贵州开磷集团股份有限公司 | The method of Dihydrate gypsum whiskers prepared by a kind of ardealite |
| CN106698497A (en) * | 2017-01-22 | 2017-05-24 | 武汉工程大学 | Method for preparing calcium sulfate from ardealite |
| CN109485281A (en) * | 2018-12-29 | 2019-03-19 | 四川绵竹市盘龙矿物质有限责任公司 | A kind of method of ardealite online production building material |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110706 |