CN102515586A - Method for producing cement by using calcium sulphate waste with high water content for replacing gypsum - Google Patents
Method for producing cement by using calcium sulphate waste with high water content for replacing gypsum Download PDFInfo
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- CN102515586A CN102515586A CN2011104175016A CN201110417501A CN102515586A CN 102515586 A CN102515586 A CN 102515586A CN 2011104175016 A CN2011104175016 A CN 2011104175016A CN 201110417501 A CN201110417501 A CN 201110417501A CN 102515586 A CN102515586 A CN 102515586A
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- CN
- China
- Prior art keywords
- calcium sulfate
- waste material
- water content
- sulfate waste
- gypsum
- Prior art date
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Processing Of Solid Wastes (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a method for producing cement by using calcium sulphate waste with a high water content for replacing gypsum, wherein the production process comprises the following steps of: preparation for a raw material; calcination for a clinker; stacking and cooling; and grinding. The method is characterized in that: the calcium sulphate waste with a high water content is added in the clinker after the calcination for the clinker, and the grinding process is performed after the stacking and cooling. Via the technical scheme, calcium sulphate waste with high water content can evaporate redundant water by the heat released during cooling for the clinker, and requirements on product machining can be satisfied without the need to heat and calcine additionally, thereby solving the problem of utilization for waste, promoting recycling, creating economic benefits, decreasing production cost and protecting environment.
Description
Technical field
The present invention relates to a kind of Cement Production method, especially a kind of method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement.
Background technology
In Industrial processes such as lactic acid, can produce the very high calcium sulfate waste material of a kind of water ratio, general water ratio can reach 30-50%.Because water ratio is too high, when using these waste materials to produce the calcium sulfate product, the exsiccant cost that dewaters is very high; And owing to the reason of having added various catalyzer in process of production; Cause the purification difficulty big, the calcium sulfate product foreign matter content of producing is very high, so this waste material never obtains utilizing; Directly stacked perhaps and buried, caused the certain environmental pollution and the wasting of resources.Someone attempts producing cement with its instead of gypsum, but also because water ratio is too high, in adding ball mill, pulverizes when even, is easy to generate bonding, does not reach the effect that substitutes gypsum.(the patent No.: 03104592.8) provide a kind of phosphogypsum to replace the method that the plaster of paris is produced cement that patent " is utilized the technology of industrial waste production sulphur (iron) aluminate cement "; But need, phosphogypsum through the calcination processing that being not less than 800 ℃ before using; Cost is increased substantially, lost the progressive meaning of technology.
Summary of the invention
The object of the present invention is to provide a kind of direct use high-moisture calcium sulfate waste material instead of gypsum to produce the method for cement.
For achieving the above object; Take following technical scheme: a kind of method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement; It produces flow process and comprises: the calcining of raw material preparation-grog-stacking cooling-abrasive dust; Its characteristics are: after the calcining of grog, high-moisture calcium sulfate waste material is added in the grog, carry out the abrasive dust process again after the stacking cooling.
After adopting above technical scheme; The heat that high-moisture calcium sulfate waste material is discharged when utilizing the grog cooling evaporates redundant moisture, need not to carry out the requirement that heating and calcining promptly satisfies product processing in addition, has solved the problem of utilizing of product; Promote reclamation of waste materials; Create economic benefit, reduced production cost, also protected environment simultaneously.
Embodiment
Adopting the water ratio that produces in the lactic acid factory production process is that 40% calcium sulfate waste material is produced.Raw materials such as Wingdale, clay are mixed the levigate raw material that are configured to, put into rotary kiln then and calcine, accomplish forwarding the warehouse to and stack in the process of cooling at burning clinker of cement, high-moisture calcium sulfate waste material is added in the middle of the grog.The mass ratio of calcium sulfate waste material and grog is 4:96.Can adopt the range upon range of addition manner of grog-calcium sulfate waste material-grog, also can directly mix with grog.The tapping temperature of grog was accomplished waste material and is added generally all more than 1000 ℃ before clinker temperature drops to 850 ℃.When clinker temperature was reduced to 100 ℃ of left and right sides, the water ratio of calcium sulfate waste material dropped to 2-4%.Again grog is sent into and carried out abrasive dust in the ball mill, add the modification that is mixed of other additives, produce cement.
According to the difference of production requirement, the interpolation proportion of calcium sulfate waste material is 3-5%.
Claims (4)
1. method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement; Its Production Flow Chart comprises: the calcining of raw material preparation-grog-stacking cooling-abrasive dust; Its characteristics are: after the calcining of cement clinker, high-moisture calcium sulfate waste material is added in the grog, carry out abrasive dust again after the stacking cooling.
2. a kind of according to claim 1 method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement is characterized in that said high-moisture calcium sulfate waste material is to produce in the lactic acid production process.
3. a kind of according to claim 1 method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement is characterized in that the temperature of grog was not less than 850 ℃ when high-moisture calcium sulfate waste material added in the grog.
4. a kind of according to claim 1 method of using high-moisture calcium sulfate waste material instead of gypsum to produce cement, the interpolation proportion that it is characterized in that high-moisture calcium sulfate waste material is 3-5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104175016A CN102515586A (en) | 2011-12-14 | 2011-12-14 | Method for producing cement by using calcium sulphate waste with high water content for replacing gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104175016A CN102515586A (en) | 2011-12-14 | 2011-12-14 | Method for producing cement by using calcium sulphate waste with high water content for replacing gypsum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102515586A true CN102515586A (en) | 2012-06-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104175016A Pending CN102515586A (en) | 2011-12-14 | 2011-12-14 | Method for producing cement by using calcium sulphate waste with high water content for replacing gypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102515586A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904852A (en) * | 2017-03-20 | 2017-06-30 | 重庆市新嘉南建材有限责任公司 | The method and apparatus that a kind of utilization clinker produces cement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219865A (en) * | 2007-12-05 | 2008-07-16 | 北京瑞泰高温材料科技股份有限公司 | Silicate cement for manufacturing advanced silica refractory and manufacturing technique thereof |
| CN101468792A (en) * | 2007-12-28 | 2009-07-01 | 尹小林 | Novel technique for producing sulfur from industrial waste gypsum |
-
2011
- 2011-12-14 CN CN2011104175016A patent/CN102515586A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219865A (en) * | 2007-12-05 | 2008-07-16 | 北京瑞泰高温材料科技股份有限公司 | Silicate cement for manufacturing advanced silica refractory and manufacturing technique thereof |
| CN101468792A (en) * | 2007-12-28 | 2009-07-01 | 尹小林 | Novel technique for producing sulfur from industrial waste gypsum |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106904852A (en) * | 2017-03-20 | 2017-06-30 | 重庆市新嘉南建材有限责任公司 | The method and apparatus that a kind of utilization clinker produces cement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120627 |