CN1044932A - Produce the muriatic addition method of white cement - Google Patents
Produce the muriatic addition method of white cement Download PDFInfo
- Publication number
- CN1044932A CN1044932A CN 90105759 CN90105759A CN1044932A CN 1044932 A CN1044932 A CN 1044932A CN 90105759 CN90105759 CN 90105759 CN 90105759 A CN90105759 A CN 90105759A CN 1044932 A CN1044932 A CN 1044932A
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- CN
- China
- Prior art keywords
- kiln
- muriatic
- kcl
- cacl
- cement
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to and produce white portland cement adding NaCl, KCl, CaCl
2Or NH
4Muriatic method such as Cl.
Produce white silicate cement in the prior art.For improving the whiteness of its cement, in raw material, use to add NaCl, KCl, CaCl
2Or NH
4Muriatic method such as Cl.But this method only is suitable for wet production, and dry production is invalid with the whiteness that this method improves white cement.The present invention is with muriate NaCl, KCl, CaCl
2Or NH
4Cl etc. join in the equipment of calcining white portland cement clinker gas temperature greater than at least one place of 650 ℃.Utilize technical scheme of the present invention, can both improve the whiteness of white cement in wet production and dry production effectively.
Description
The invention belongs to and produce white portland cement adding NaCl, KCl, CaCl
2Or NH
4Muriatic method such as Cl.
At present, produce white portland cement in the prior art, the adding muriate in raw material that has improves the whiteness of white cement, and yellow civilian prosperous volume " cement technology of publishing in July, 1986 in China Construction Industry Press " the 264th page of first version discloses this method.Add NaCl, KCl, CaCl in the raw material
2Or NH
4Muriates such as Cl in the calcination process of grog, generate volatile FeCl with ferric oxide effect in the crude fuel
3, FeCl
3From waste gas, discharge, reduce Fe in the grog
2O
3Content, improve the whiteness of white cement.This method is only just effective when wet production, and dry production is invalid with the whiteness that this method improves white cement.Dry production is because the spent air temperture height, muriate with the ferric oxide effect before just be evaporated completely, do not reduce Fe in the grog
2O
3Content, do not improve the whiteness of white cement.
Task of the present invention is to propose a kind of adding to contain NaCl, KCl, CaCl
2Or NH
4The method of muriatic material such as Cl makes when dry method and wet production white portland cement, all can improve the whiteness of its cement effectively.
Task of the present invention can reach by following measure: contain NaCl, KCl, CaCl
2Or NH
4At least a muriatic material such as Cl joins in the equipment of calcining white portland cement clinker gas temperature greater than at least one place of 650 ℃.
Solution of the present invention is described in further detail below in conjunction with embodiment.
The calcining white portland cement clinker is made fuel with coal, contains NaCl, KCl, CaCl
2Or NH
4At least a muriatic material such as Cl and coal co-production make muriate mix equably with coal dust.The coal dust for preparing sprays in the kiln from the kiln hood of rotary kiln, perhaps feeds in the exterior decomposing furnace of kiln.
Muriatic content is less than 8% in the coal dust for preparing.
Grog after the calcining is handled and is got final product through cooling, bleaching.
Solution of the present invention can also illustrate with following embodiment:
The calcining white portland cement clinker, special-purpose feeding machine will contain NaCl, KCl, CaCl
2Or NH
4At least a muriatic material such as Cl, with following at least a method:
(1) kiln hood from rotary kiln sprays in the kiln;
(2) from the kiln of rotary kiln, feed in the kiln;
(3) in the feeding exterior decomposing furnace of kiln;
(4) in the outer preheater of feeding kiln gas temperature greater than some at least places of 650 ℃.
The add-on of chloride materials should be less than 3% of raw material add-on by muriate.Grog after the calcining is handled and is got final product through cooling, bleaching.
The present invention has following advantage compared to existing technology:
No matter 1 is wet method or dry production white portland cement, method of the present invention compared to existing technology, in the clinker burning process, the iron oxide effect in chloride and the crude fuel generates considerable FeCl3，FeCl
3From waste gas, discharge, thereby reduce Fe in the grog2O
3Content, improve the whiteness of white cement.
The muriate that 2 methods of the present invention add can also reduce the calcining temperature of grog, improves the output of kiln, reduces the content of f-CaO in the grog, increases cement intensity.
Some explanations of last table: the data that go up table are at a dry method hollow kiln test gained.Make fuel with coal, with chloride materials and coal co-production; Prior art and method of the present invention have all adopted water cooling, bleaching to handle.
Claims (6)
1, produces the muriatic addition method of white cement, produce the white portland cement adding and contain NaCl, KCl, CaCl
2Or NH
4Chloride materials such as Cl is characterized in that containing NaCl, KCl, CaCl
2Or NH
4At least a muriatic material such as Cl joins in the equipment of calcining white portland cement clinker gas temperature greater than at least one place of 650 ℃.
2,, it is characterized in that containing NaCl, KCl, CaCl according to the method for claim 1
2Or NH
4At least a muriatic material such as Cl and coal co-production spray into the coal dust of chloride after the preparation in the kiln from rotary kiln end.
3,, it is characterized in that containing NaCl, KCl, CaCl according to the method for claim 1
2Or NH
4At least a muriatic material such as Cl and coal co-production are in the coal dust feeding precalciner kiln with the chloride after the preparation.
4, according to claim 2 or 3, in the coal dust of the chloride after it is characterized in that preparing, muriatic content is less than 8%.
5, according to the method for claim 1, it is characterized in that ad hoc feeding machine, will contain NaCl, KCl, CaCl
2Or NH
4At least a muriatic material such as Cl, with following at least a method:
(1) kiln hood from rotary kiln sprays in the kiln;
(2) from the kiln of rotary kiln, feed in the kiln;
(3) in the feeding exterior decomposing furnace of kiln;
(4) in the outer preheater of feeding kiln gas temperature greater than some at least places of 650 ℃.
6, according to claim 5, it is characterized in that the add-on of chloride materials, should be by muriate less than 3% of raw material add-on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105759 CN1044932A (en) | 1990-01-20 | 1990-01-20 | Produce the muriatic addition method of white cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105759 CN1044932A (en) | 1990-01-20 | 1990-01-20 | Produce the muriatic addition method of white cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1044932A true CN1044932A (en) | 1990-08-29 |
Family
ID=4879562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105759 Pending CN1044932A (en) | 1990-01-20 | 1990-01-20 | Produce the muriatic addition method of white cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044932A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100016C (en) * | 1999-05-14 | 2003-01-29 | 方文兵 | Method for improving whiteness of white cement clinker |
| KR20220086748A (en) * | 2020-12-16 | 2022-06-24 | 한국세라믹기술원 | High chlorine cement clinker with improved burnability |
-
1990
- 1990-01-20 CN CN 90105759 patent/CN1044932A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100016C (en) * | 1999-05-14 | 2003-01-29 | 方文兵 | Method for improving whiteness of white cement clinker |
| KR20220086748A (en) * | 2020-12-16 | 2022-06-24 | 한국세라믹기술원 | High chlorine cement clinker with improved burnability |
| KR102459113B1 (en) * | 2020-12-16 | 2022-10-26 | 한국세라믹기술원 | High chlorine cement clinker with improved burnability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |