CN101885617B - Wear and corrosion resistant castable prepared from bauxite-based homogenous material and preparation method thereof - Google Patents
Wear and corrosion resistant castable prepared from bauxite-based homogenous material and preparation method thereof Download PDFInfo
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- CN101885617B CN101885617B CN 201010219738 CN201010219738A CN101885617B CN 101885617 B CN101885617 B CN 101885617B CN 201010219738 CN201010219738 CN 201010219738 CN 201010219738 A CN201010219738 A CN 201010219738A CN 101885617 B CN101885617 B CN 101885617B
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Abstract
The invention discloses wear corrosion resistant castable prepared from a bauxite-based homogenous material and a preparation method thereof, which belong to the technical field of castable refractory. In the invention, by using the characteristics of the bauxite-based homogenous material, such as homogeneous chemical components and structure, stable performance, mulite main crystal phase, small linear change, high high-temperature strength and certain flexibility due to mutual insertion of micro crystals and the like, the shortcomings of low middle-temperature strength and poor wear resistance and alkali corrosion resistance of the conventional high-aluminum bauxite castable are overcome, and the problems of low middle-temperature strength, poor wear resistance and poor alkali, chloride and sulphur corrosion resistance of the conventional high-aluminum and corundum castable are effectively solved. The wear and corrosion resistant castable with high middle-temperature performance is prepared. The wear corrosion resistant castable and the preparation method thereof have the advantages of small fluctuation of water adding amount in construction, stable usability, reduction rate of partial corrosion, prolonged service life and wide application to a kiln hood, a grate cooler, a tertiary air duct and a decomposing furnace of a dry process cement kiln and relative parts of other ceramic and petrified thermo-technical kilns and the like.
Description
Technical field
The invention belongs to the refractory castable technical field, a kind of wear-resisting anti-erosion mould material and method thereof that adopts alumina-based homogeneous material preparation particularly is provided, prepare dry-process cement rotary kiln with wear-resisting anti-erosion refractory castable.
Background technology
From the nineties later stage in last century so far, the New Type Dry-process Cement Production development of China is swift and violent, especially large-scale new dry process rotary kiln, as the new dry cement production technology equipment of producing 10000 tons of 5000 tons, daily output daily is reached advanced world standards, China has become the clay center of making of World Water, and the large-scale dry-process cement rotary kiln production line of at present domestic existing daily output above 2500 tons exceeded 400.
The impact that the raising of production technology level is served to the dry cement production line band.Be subject to carrying the washing away of high-speed and high-temperature air-flow of a large amount of cement clinker dust such as bend for triple air hose, air-valve position, grate-cooler throat, parapet are subject to the long-term grinding of a large amount of grogs, and the refractory castable at these positions is serious wear usually, and its life-span reduces.Simultaneously, because the variation of fuel has caused the compositions such as alkali, chlorine, sulphur obviously to increase, their enrichments that circulates in kiln are to the also obviously aggravation of erosion of the refractory materials at each position of kiln system.After the positions such as tertiary-air pipe, grate-cooler throat, wicket cover, parapet are corroded by compositions such as alkali, chlorine, sulphur, form alkali cracking, be easy to occur peeling phenomenon behind the sweep of gases, its wear resisting property sharply descends, need often to repair or change, affect the normal production of cement kiln, reduce the operation factor of cement kiln.
Traditional alumine matter mould material and corundum pouring material are because the defective of its material self can not well adapt to the service requirements of current cement kiln.A kind of recovery features in conjunction with the domestic aluminum bauxite mine is provided in the Chinese invention patent of publication number for CN1326804C, low-grade bauxite and coal gangue are the preparation method of main material production alumina base mullite homogeneous material in the comprehensive utilization, prepared and had uniform composition, the quality refractory raw material of structure and performance, this high-quality synthesis material has the refractoriness height, good thermal shock, creep resistance, refractoriness under load is high, volume stability is good, the character such as mechanical behavior under high temperature is superior, it is desirable senior refractory raw material, pursued by industry gradually, become the developing direction of following refractory materials.
Therefore, the present invention utilizes the superior performance characteristics of alumina-based homogeneous material just, in conjunction with the new demand of present cement kiln production line to refractory materials, develops the refractory castable that a kind of medium temperature intensity is high, wear resistance is good, can resist alkali, chlorine, sulphur corrosion.
Summary of the invention
The object of the invention is a kind of wear-resisting anti-erosion mould material and method thereof that adopts the preparation of alumina-based homogeneous material, utilize alumina-based homogeneous material chemical ingredients, the structure homogeneous, stable performance, principal crystalline phase is mullite, linear change is little, crystal mutually intert to form and has good hot strength on the microcosmic, have again simultaneously the characteristics such as certain snappiness, it is low to improve present alumine matter mould material medium temperature intensity, the shortcoming that the wear, alkali resistant aggressiveness is poor, effectively solved present High-Alumina and the corundum pouring material medium temperature intensity is low, wear, alkali resistant, chlorine, the problem of sulphur corrosion poor performance.Preparing a kind of middle warm nature can excellent wear-resisting anti-erosion mould material.
Composition of the present invention, even structure, construction amount of water fluctuation is little, use properties stable, has reduced the probability of local deterioration, and what strengthened the maintenance and repair time when increasing the service life can be planned.The prepared high abrasion anti-erosion mould material of the present invention can be widely used in the region of interest of the thermal kiln furnaces such as dry-process cement rotary kiln wicket cover, grate-cooler, tertiary-air pipe, decomposing furnace and other potteries, petrochemical industry.
The wear-resisting anti-erosion mould material of employing alumina-based homogeneous material preparation provided by the present invention is comprised of aggregate and powder, aluminum oxide powder, silicon powder, pure calcium aluminate cement, the admixture of alumina-based homogeneous material, and the mass percent of each raw material is as follows:
The aggregate of alumina-based homogeneous material and powder 60～80%
Aluminum oxide powder 3～25%
Silicon powder 2～6
Pure calcium aluminate cement 1～7%
Admixture 0.1～0.45%
Among the present invention in the mould material mass ratio of aggregate and powder be (52～74%)～(48～26%).The chemical ingredients of alumina-based homogeneous material requires Al
2O
3〉=50%, Fe
2O
3≤ 2.5%.Used alumina-based homogeneous material aggregate and powder Al
2O
3Content fluctuation≤2%.The chemical ingredients of aluminum oxide powder requires Al
2O
3〉=95%, median size≤180 orders.Pure calcium aluminate cement refers to Al
2O
3Content is 58%～72% aluminous cement.Admixture is following one or more: Trisodium Citrate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, boric acid, lithium hydroxide, polymer organic admixture.
Preparation method of the present invention is as being: after the aggregate of alumina-based homogeneous material and powder, aluminum oxide powder, silicon powder, pure calcium aluminate cement, admixture are fully mixed, add the further full and uniform mixing of 4～7% water, namely get the wear-resisting anti-erosion mould material that adopts the preparation of alumina-based homogeneous material.
Alumina-based homogeneous material matter high abrasion anti-erosion mould material of the present invention is compared the advantage that has with alumine matter mould material and is with corundum pouring material:
1. main material alumina-based homogeneous material is take mullite as principal crystalline phase among the present invention, and hot strength is high, and particle is combined with matrix closely, at high temperature has anti-sweep of gases and the solid wearing and tearing ability more superior than alumina matter mould material;
2. main material alumina-based homogeneous material open pore is low among the present invention, and the construction amount of water is low, and density is high after the moulding, and alkali resistant, chlorine, sulphur corrosion performance are good.
3. Raw composition of the present invention, even structure, the amount of water fluctuation is little, and use properties is stable, and the probability of local deterioration is little after using, normal service life that can extension device; Simultaneously, make the equipment operation cycle be tending towards fixing, what strengthened the maintenance and repair time can be planned.
Embodiment
The below illustrates enforcement of the present invention and characteristics, but the present invention is not limited to the restriction of following embodiment.
Embodiment 1
Adopt the wear-resisting anti-erosion mould material of alumina-based homogeneous material preparation to press the ratio preparation:
70 alumina-based homogeneous material particle diameters are at 3-5 millimeter 16%
(Al
2O
3Content is 70%)
70 alumina-based homogeneous material particle diameters are at 1-3 millimeter 38%
70 alumina-based homogeneous material particle diameters are at 0-1 millimeter 27%
Aluminum oxide powder 8%
Silicon powder 6%
Pure calcium aluminate cement 5%
Admixture 0.3%
Embodiment 2
Adopt the wear-resisting anti-erosion mould material of alumina-based homogeneous material preparation to press the ratio preparation:
80 alumina-based homogeneous material particle diameters are at 3-5 millimeter 20%
(Al
2O
3Content is 80%)
80 alumina-based homogeneous material particle diameters are at 1-3 millimeter 30%
80 alumina-based homogeneous material particle diameters are at 0-1 millimeter 18%
Aluminum oxide powder 21%
Silicon powder 5%
Pure calcium aluminate cement 6%
Admixture 0.235%
Embodiment 3
Adopt the wear-resisting anti-erosion mould material of alumina-based homogeneous material preparation to press the ratio preparation:
88 alumina-based homogeneous material particle diameters are at 5-8 millimeter 12%
(Al
2O
3Content is 88%)
88 alumina-based homogeneous material particle diameters are at 3-5 millimeter 12%
88 alumina-based homogeneous material particle diameters are at 1-3 millimeter 16%
88 alumina-based homogeneous material particle diameters are at 0-1 millimeter 36%
Aluminum oxide powder 15%
Silicon powder 4%
Pure calcium aluminate cement 5%
Admixture 0.43%
The present invention adopts the performance in the wear-resisting anti-erosion mould material example of alumina-based homogeneous material preparation to see the following form:
Claims (1)
1. wear-resisting anti-erosion mould material that adopts alumina-based homogeneous material preparation, it is characterized in that: aggregate and powder, aluminum oxide powder, silicon powder, pure calcium aluminate cement, admixture by the alumina-based homogeneous material form, and the mass percent of each raw material is as follows:
The mass ratio of aggregate and powder is 52～74%: 48～26% in the mould material; The chemical ingredients of alumina-based homogeneous material requires Al
2O
3〉=50%, Fe
2O
3≤ 2.5%;
Used alumina-based homogeneous material aggregate and powder Al
2O
3Content fluctuation≤2%;
The chemical ingredients of described aluminum oxide powder requires Al
2O
3〉=95%, median size≤180 orders;
Described pure calcium aluminate cement refers to Al
2O
3Content is 58%～72% aluminous cement;
Described admixture is in Trisodium Citrate, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, boric acid, lithium hydroxide or the polymer organic admixture one or more;
After the aggregate of alumina-based homogeneous material and powder, aluminum oxide powder, silicon powder, pure calcium aluminate cement, admixture prepared burden by mass percentage and mixing, add 4～7% water and evenly mix again, obtain wear-resisting anti-erosion mould material.
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| CN 201010219738 CN101885617B (en) | 2010-06-28 | 2010-06-28 | Wear and corrosion resistant castable prepared from bauxite-based homogenous material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010219738 CN101885617B (en) | 2010-06-28 | 2010-06-28 | Wear and corrosion resistant castable prepared from bauxite-based homogenous material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN101885617A CN101885617A (en) | 2010-11-17 |
| CN101885617B true CN101885617B (en) | 2013-10-16 |
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Address after: 045011 mahuanggou section, Yinying Park, Yangquan economic and Technological Development Zone, Shanxi Province Patentee after: YANGQUAN JINYU TONGDA HIGH TEMPERATURE MATERIALS Co.,Ltd. Patentee after: Beijing Jinyu Tongda refractory Technology Co.,Ltd. Address before: 045013 Bai Quan Industrial Park, Yangquan, Shanxi Patentee before: YANGQUAN JINYU TONGDA HIGH TEMPERATURE MATERIALS Co.,Ltd. Patentee before: TONGDA REFRACTORY TECHNOLOGIES Co.,Ltd. |