CN104634096A - Chrome-free configuration structure of inner kiln refractory material of rotary cement kiln - Google Patents
Chrome-free configuration structure of inner kiln refractory material of rotary cement kiln Download PDFInfo
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- CN104634096A CN104634096A CN201510078047.4A CN201510078047A CN104634096A CN 104634096 A CN104634096 A CN 104634096A CN 201510078047 A CN201510078047 A CN 201510078047A CN 104634096 A CN104634096 A CN 104634096A
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Abstract
The invention discloses a chrome-free configuration structure of an inner kiln refractory material of a rotary cement kiln. The chrome-free configuration structure of the inner kiln refractory material of the rotary cement kiln is characterized by comprising bottom-layer castable, highly abrasive bricks, MS2T magnesia spinel bricks, MS1C magnesia spinel bricks, MS4TC magnesia spinel bricks, red guimo bricks, guimo bricks and sealing castable. The chrome-free configuration structure of the inner kiln refractory material of the rotary cement kiln has the advantages that spinels have sealed lattice structures, after filling by suitable phases, calcium oxide ions are prevented from entering lattices, chemical reaction between cement clinker and the spinels only occurs on surfaces of the spinels, and compared with chemical erosion on other types of spinel magnesia bricks with open lattices, the chemical erosion of clinker on the spinel magnesia bricks with the sealed lattices can be remarkably lowered. 8-12% of waste chrome emission can be reduced in terms of each rotary cement kiln.
Description
Technical field
The present invention relates to a kind of cement rotary kiln Material Field, the structure of refractory material Trend of Chrome-free configuration in the kiln especially relating to a kind of cement rotary kiln.
Background technology
The 1950's, basic brick started a large amount of use at cement kiln clinkering zone, originally principal item be silicate in conjunction with magnesite-chrome brick, to the seventies, new type dry kiln just uses Direct bond magnesia-chrome brick in a large number.Lining durability is had increased significantly.Due to the performance of its excellence, desirable result of use, makes magnesite-chrome brick be in leading position in cement rotary kiln refractory material always.But the Cr+6 in magnesite-chrome brick works the mischief to environment, for eliminating chromium public hazards, protection environment for human survival; at developed countries and regions; cement kiln clinkering zone Direct bond magnesia-chrome brick reduces year by year, from the nineties in 20th century so far, the application of chromium-free alkaline brick for cement kiln expands rapidly.The kind of current domestic large-scale dry method kiln alkaline brick is clinkering zone Direct bond magnesia-chrome brick, and intermediate zone Mg-Al spinel brick, the development and application of clinkering zone Chromeless basic brick is made slow progress.
In basic brick, chrome ore elastic fibrous tissue modifier improves the material elasticity of basic brick and toughness, thus improve brick laying structure elasticity have better volume stability, elevated temperature strength, to the less sensitiveness of thermal shock and good extension kliner coating performance.
For a long time, chrome ore is used as modifier always, and still have some bricks in use at present, it is functional.But the chrome ore in all magnesite-chrome bricks is all by the erosion of alkali compound and alkali sulphur compound, and generate water-soluble alkali chromic salts or alkali chromium sulfosalt, the chromium contained by above-mentioned alkali chromic salts is harmful Cr VI.Chromium and kiln gas play poisonous reaction simultaneously.
Under excessive high temperature, be decomposed by the abnormal chrome ore periphery that alkali and clinker corrode, the chrome ore as brick Body components no longer plays the function of modifier, and in addition, part brick body suffers liquid infiltration become fragile and peel off.
Kiln material can corrode the chromium compound in magnesite-chrome brick, generates second melting thing, reduces the refractoriness of refractory brick, is the densification of brick body, peels off, finally peeled off by the brick body layer permeated, produce permanent damage.
Summary of the invention
The structure of refractory material Trend of Chrome-free configuration in the kiln that the object of this invention is to provide a kind of cement rotary kiln, the problem of refractory material Trend of Chrome-free in the kiln solving cement rotary kiln.
The technical solution adopted for the present invention to solve the technical problems is:
A structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, with 5000 t/d cement rotary kilns, in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS2T magnesia-spinel brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → silicon mullite red brick → siliceous mullite brick → sealing castable.
A structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, with 2000 t/d cement rotary kilns, in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → siliceous mullite brick → sealing castable.
A structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, with 10000 t/d cement rotary kilns, in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → MS2T magnesia-spinel brick → MS3C magnesia-spinel brick → MS2T magnesia-spinel brick → anti-peeling high aluminium brick → sealing castable.
Beneficial effect of the present invention: in the kiln of cement rotary kiln, the spinelle of the structure of refractory material Trend of Chrome-free configuration is with the lattice structure closed.When by after the filling mutually that is applicable to, in calcium hydroxide ions entry deterrence lattice, chemical reaction between clinker and spinelle only occurs over just spinelle surface, compares with the spinelle magnesia brick of other kinds of unlimited lattice, and the spinelle magnesia brick closing lattice is obviously reduced by the chemical erosion of grog.Every bar cement rotary kiln reduces the useless row of chromium of 8-12%.
Below with reference to drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is structure of refractory schematic diagram in 5000 t/d cement rotary kiln kilns.
Fig. 2 is structure of refractory schematic diagram in 2000 t/d cement rotary kiln kilns.
Fig. 3 is structure of refractory schematic diagram in 10000 t/d cement rotary kiln kilns.
Detailed description of the invention
embodiment 1:
As shown in Figure 1, the structure of refractory material Trend of Chrome-free configuration in a kind of kiln of cement rotary kiln, is characterized in that: with 5000 t/d cement rotary kilns, and in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS2T magnesia-spinel brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → silicon mullite red brick → siliceous mullite brick → sealing castable.
And refractory material configuration in the kiln of the cement rotary kiln of existing 5000t/d line (Φ 4.8 × 74m):
Bottom castable → high wear-resistant brick → domestic spinelle → domestic magnesite-chrome brick → domestic spinelle → domestic magnesite-chrome brick → domestic anti-strip YRS-70 → sealing castable
Because the coefficient of expansion between spinelle and magnesia matrix periphery is inconsistent, in the brick body of refractory brick, generate micro-crack tissue, micro-crack significantly increases the elasticity of brick, and does not play any negative effect to the intensity of brick.
The composition of chemically-mineral and the performance of material, spinelle magnesia brick internal oxidition iron and manganese oxide content low, there is anti-oxidant reduction and alkali corrodes strong function, at burning clinker of cement temperature, not only got along well magnesia but also spinelle of getting along well of the compound of alkali reacts, add the structural elasticity that brick body is excellent, thus there is very high antistrip performance.
embodiment 2:
As shown in Figure 2, the structure of refractory material Trend of Chrome-free configuration in a kind of kiln of cement rotary kiln, is characterized in that: with 2000 t/d cement rotary kilns, and in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → siliceous mullite brick → sealing castable.
And refractory material configuration in the kiln of the cement rotary kiln of existing 5000t/d line (Φ 4.0 × 60m):
Bottom castable → high wear-resistant brick → domestic spinel brick of domestic magnesite-chrome brick → DMC-9A → domestic anti-strip brick YRS-70 seals castable.
The too pure kliner coating not easy to hang of composition in basic brick, secondary phase containing some is conducive to hanging kliner coating, for optimizing the performance of basic brick further, should take into full account that secondary phase hangs the advantage of kliner coating, and in brick, composition and structure has the performance of higher resisting cement clinker thermo-chemical erosion.The basic brick of high-quality should select the material that lattice dimensions is large and heat resistanceheat resistant chemical corrosion is strong.
embodiment 3:
As shown in Figure 3, the structure of refractory material Trend of Chrome-free configuration in a kind of kiln of cement rotary kiln, is characterized in that: with 10000 t/d cement rotary kilns, and in the kiln of the Trend of Chrome-free adopted configuration, structure of refractory is as follows from the inside to the outside:
Bottom castable → MS2T magnesia-spinel brick → MS3C magnesia-spinel brick → MS2T magnesia-spinel brick → anti-peeling high aluminium brick → sealing castable.
The too pure kliner coating not easy to hang of composition in basic brick, secondary phase containing some is conducive to hanging kliner coating, for optimizing the performance of basic brick further, should take into full account that secondary phase hangs the advantage of kliner coating, and in brick, composition and structure has the performance of higher resisting cement clinker thermo-chemical erosion.The basic brick of high-quality should select the material that lattice dimensions is large and heat resistanceheat resistant chemical corrosion is strong.
Though secondary compound is conducive to hanging kliner coating, but disadvantageously reduce the refractoriness of basic brick, obtain structure from spinelle and solve above-mentioned contradiction, general spinel crystal lattice is unlimited, outer ion has an opportunity to penetrate in lattice, if Clinker Composition calcium oxide enters lattice, very easily generate the compound of low melting point, now spinelle decomposes generation magnesia.Novel spinelle is with the lattice structure closed.When by after the filling mutually that is applicable to, in calcium hydroxide ions entry deterrence lattice, chemical reaction between clinker and spinelle only occurs over just spinelle surface, compares with the spinelle magnesia brick of other kinds of unlimited lattice, and the spinelle magnesia brick closing lattice is obviously reduced by the chemical erosion of grog.
New elastic fibrous tissue is implanted in the matrix of material by spinelle by special method, the content of magnesia of this spinel-like magnesia brick is at 80-95%, alumina content is at 3-18%, the anti-oxidant reduction of usual iron oxide <1%(is corroded strong), calcium oxide and silica only have a small amount of existence.Traditional spinelle magnesia brick is first by the spinelle of pre-synthesis and magnesia mixing, and the hydraulic press of high pressure is compressing, finally calcines in the high temperature flint road kiln that temperature reaches 1700 degree.
In cement rotary kiln, the best approach of protection kiln lining is the kliner coating that clinkering zone keeps stable; to slow down kiln gas and grog to the erosion of bricking; on the other hand, even if when in wanting, calcining situation and thermic load are comparatively normal, the clinker of some kilns still produces thermo-chemical erosion to kiln lining.
Above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that the common engineers and technicians in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (3)
1. a structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, in the kiln of the Trend of Chrome-free configuration adopted with 5000 t/d cement rotary kilns, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS2T magnesia-spinel brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → silicon mullite red brick → siliceous mullite brick → sealing castable.
2. a structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, in the kiln of the Trend of Chrome-free configuration adopted with 2000 t/d cement rotary kilns, structure of refractory is as follows from the inside to the outside:
Bottom castable → high wear-resistant brick → MS1C magnesia-spinel brick → MS4TC magnesia-spinel brick → siliceous mullite brick → sealing castable.
3. a structure for refractory material Trend of Chrome-free configuration in the kiln of cement rotary kiln, is characterized in that, in the kiln of the Trend of Chrome-free configuration adopted with 10000 t/d cement rotary kilns, structure of refractory is as follows from the inside to the outside:
Bottom castable → MS2T magnesia-spinel brick → MS3C magnesia-spinel brick → MS2T magnesia-spinel brick → anti-peeling high aluminium brick → sealing castable.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766871A (en) * | 2016-12-29 | 2017-05-31 | 安徽芜湖海螺建筑安装工程有限责任公司 | A kind of cement rotary kiln refractory material energy-saving collocation method |
| CN106766922A (en) * | 2016-12-02 | 2017-05-31 | 安徽芜湖海螺建筑安装工程有限责任公司 | The lightweight configuration structure of refractory brick in cement kiln |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10212144A (en) * | 1997-01-24 | 1998-08-11 | Tokyo Yogyo Co Ltd | Brick for cement rotary kiln |
| CN101602608A (en) * | 2009-07-20 | 2009-12-16 | 北京通达耐火技术股份有限公司 | A kind of magnesium-calcia-zirconia brick for sintering zone of cement kiln and using method thereof |
| CN102235820A (en) * | 2011-07-26 | 2011-11-09 | 浙江大学 | Lining structure of rotary kiln |
| CN102353253A (en) * | 2011-08-17 | 2012-02-15 | 通达耐火技术股份有限公司 | Rotary cement kiln |
| CN202304370U (en) * | 2011-08-17 | 2012-07-04 | 通达耐火技术股份有限公司 | Barrel body lining for cement rotary kiln with daily output of 5,000 tons |
| CN103724020A (en) * | 2013-12-08 | 2014-04-16 | 沈阳铁西装备制造业聚集区公共研发中心 | Magnesium-ferrum-aluminium chromite-free basic refractory material |
-
2015
- 2015-02-14 CN CN201510078047.4A patent/CN104634096A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10212144A (en) * | 1997-01-24 | 1998-08-11 | Tokyo Yogyo Co Ltd | Brick for cement rotary kiln |
| CN101602608A (en) * | 2009-07-20 | 2009-12-16 | 北京通达耐火技术股份有限公司 | A kind of magnesium-calcia-zirconia brick for sintering zone of cement kiln and using method thereof |
| CN102235820A (en) * | 2011-07-26 | 2011-11-09 | 浙江大学 | Lining structure of rotary kiln |
| CN102353253A (en) * | 2011-08-17 | 2012-02-15 | 通达耐火技术股份有限公司 | Rotary cement kiln |
| CN202304370U (en) * | 2011-08-17 | 2012-07-04 | 通达耐火技术股份有限公司 | Barrel body lining for cement rotary kiln with daily output of 5,000 tons |
| CN103724020A (en) * | 2013-12-08 | 2014-04-16 | 沈阳铁西装备制造业聚集区公共研发中心 | Magnesium-ferrum-aluminium chromite-free basic refractory material |
Non-Patent Citations (2)
| Title |
|---|
| 张巍: ""水泥窑用耐火材料的研究进展"", 《水泥工程》 * |
| 陈友德编译: ""新生产线耐火材料的配置"", 《水泥技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766922A (en) * | 2016-12-02 | 2017-05-31 | 安徽芜湖海螺建筑安装工程有限责任公司 | The lightweight configuration structure of refractory brick in cement kiln |
| CN106766871A (en) * | 2016-12-29 | 2017-05-31 | 安徽芜湖海螺建筑安装工程有限责任公司 | A kind of cement rotary kiln refractory material energy-saving collocation method |
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