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Pouring material for manufacturing pellet ore rotary kiln and manufacturing method thereof

A technology of castable and rotary kiln, which is applied in the field of castable and its preparation for the manufacture of pelletized ore rotary kiln, which can solve the problems of unusable technology and achieve the effects of improved thermal damage resistance, simple preparation method and long service life

Inactive Publication Date: 2009-02-18
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned public documents are all aimed at cement rotary kiln, and the use conditions of cement rotary kiln and pellet ore rotary kiln are different. Cement kiln is basic charge, while pellet is acid charge. Therefore, these technologies cannot be used in pellet ore rotary kiln. kiln use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The castable used to manufacture the pelletized rotary kiln, its composition and weight are: 60kg of bauxite, 26.9kg of mullite, and the weight of the castable matrix (coarse aggregate) with a particle size of 1-15mm accounts for the weight of the castable matrix 80% of the weight of the castable matrix (powder) with a particle size of 0.01-1mm accounts for 20% of the weight of the castable matrix; silicon carbide with a particle size of less than 1mm: 3kg, 4kg of silicon oxide powder with a particle size of 0.5-90μm, zircon 2kg, calcium aluminate cement 4kg, sodium tripolyphosphate 0.1kg.

[0028] The preparation method steps of the castable are as follows: mix bauxite and mullite evenly, then add silicon carbide, silicon oxide micropowder, zircon, calcium aluminate cement, sodium tripolyphosphate, pre-mix evenly in a forced mixer, Finished product, packaged for use.

[0029] The steps for using the castable are as follows: when manufacturing a rotary kiln for produci...

Embodiment 2

[0032] The castable for manufacturing pellet rotary kiln, its composition and weight are: 70.3kg of bauxite, in which the weight of the castable matrix (coarse aggregate) with a particle size of 1-15mm accounts for 90% of the weight of the castable matrix, and the granularity The weight of the castable matrix (powder) of 0.01-1mm accounts for 10% of the weight of the castable matrix; 12kg of silicon carbide with a particle size of less than 1mm (less than 200 mesh), 3kg of alumina micropowder with a particle size of 0.5-90μm, zirconium mullite 5kg, calcium aluminate cement 4.5kg, sodium hexametaphosphate 0.2kg.

[0033] The preparation method steps of the castable are as follows: the castable matrix composed of bauxite, mullite coarse aggregate and powder is initially mixed, mixed evenly, and then silicon carbide, alumina micropowder, zirconia mullite, aluminum Calcium acid cement and sodium hexametaphosphate are pre-mixed evenly in a forced mixer, and the finished product is ...

Embodiment 3

[0037] The castable used to manufacture the pellet rotary kiln has the following components and weight: 20kg of bauxite, 49.35kg of mullite, and 15kg of corundum. The weight of the castable matrix (coarse aggregate) with a particle size of 1-15mm accounts for 70% of the weight of the castable matrix, the weight of the castable matrix (powder) with a particle size of 0.01-1mm accounts for 30% of the weight of the castable matrix; silicon carbide with a particle size of less than 1mm: 4kg, 5kg of alumina powder with a particle size of 0.5-90μm, Zircon 3kg, calcium aluminate cement 3.5kg, sodium tripolyphosphate 0.15kg.

[0038] The preparation method steps of the castable are as follows: the castable matrix composed of bauxite, mullite, corundum coarse aggregate and powder is initially mixed, and then silicon carbide, alumina micropowder, zircon, Calcium aluminate cement and sodium tripolyphosphate are pre-mixed evenly in a forced mixer, and the finished product is packed for us...

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Abstract

The invention relates to a casting material used for producing pellet rotary kiln and a preparation method thereof, the casting material is a combination, and contained components and weight percentage occupied in the combination contain: 70 to 92 percent of casting material basal body, 3 to 8 percent of micro powder of monox or micro powder of alumina, 0.001 to 5 percent of zirconium mullite or zirconite, 1 to 12 percent of carborundum, 0.005 to 5 percent calcium aluminate cement and 0.01 to 1 percent of dispersant; the casting material basal body is the combination of one or several of corundum, bauxite and porzite. The preparation method of the casting material has the following steps: first uniformly mixing the casting material basal body, then adding other components to be uniformly mixed, and finishing goods. The casting material contains the carborundum, the carborundum has the characteristic of difficult infiltration with furnace burden containing iron, and ring formation materials are difficult to be felted on a furnace brick lining; in addition, the carborundum can increase acidic furnace burden anti-corrosion performance of the casting material, and thus the life of the rotary kiln is enhanced. The preparation method of the casting material is simple and has low cost.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a pouring material for manufacturing a rotary kiln, in particular to a casting material for manufacturing a pellet rotary kiln and a preparation method thereof. Background technique [0002] There are not many research reports on castables used in the manufacture of pellet rotary kilns. In the past, bauxite or mullite cement-bonded castables were often used, which have low bonding strength at medium temperature, poor ring resistance, and poor durability. [0003] Dong Wei's article "Research on the Application of Low Cement Mullite Refractories in Pellet Rotary Kiln" in "Master's Dissertation" 2006.1-76, introduced the chain grate machine-rotary kiln kiln head and kiln tail necking parts using steel Fiber and low cement mullite shrinkage castable, the kiln body of the rotary kiln is made of steel fiber low cement mullite castable, the overall service life can reach more than 2.5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 徐国涛李伟赵荣坤梅智学陈向东张洪雷赵一川白有力
Owner 武钢集团有限公司
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