Poured material for foundry ladle bottom and its pouring process and mold

A castable and molten iron technology, which is used in molds, manufacturing tools, cement mixing devices, etc., can solve the problems of low medium and high temperature strength, high water content, and low service life, and achieve high medium and high temperature strength, low water content, Effect of bottom radian specification

Inactive Publication Date: 2007-08-22
CHEMIAL PLANT GANGCHENG ENTERPRISE GENERAL PANZHIHUA IRON & STEEL GROUP
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Problems solved by technology

[0003] In order to solve the shortcomings of existing castables for the bottom of molten iron tanks and manual pouring processes, such as high water content, low strength at medium and high temperatures, non-compact structure, and low service life, the invention provides a castable for the bottom of molten iron tanks and a pouring process. And special mold

Method used

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  • Poured material for foundry ladle bottom and its pouring process and mold

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Embodiment Construction

[0011] According to the requirements for the use of refractory materials at the bottom of molten iron tanks at home and abroad, the physical and chemical indicators of castables at the bottom of molten iron tanks are shown in Table 1:

[0012] Table 1 Physicochemical indicators of bottom pouring of molten iron tanks

[0013]

project

al 2 o 3

(%)

Refractoriness

(℃)

Compressive strength (MPa)

1300℃×3h

Bulk density (g / cm 3 )

110℃×24h

standard value

≥60

≥1790

≥35

≥2.5

[0014] According to the above requirements, considering the matching of tank bottom castables and tank body refractory bricks (high alumina bricks), select super-grade bauxite aggregates, corundum, silica powder, magnesia, admixtures, etc. The main components and weight percentages are shown in Table 2; See Table 3 for the weight percentage of the original castable components.

[0015] ...

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Abstract

The present invention is poured material for foundry ladle bottom and its pouring process and mold. The poured material consists of high grade alumina clinker, white alundum, fine alumina powder, magnesite sand clinker and fine silica powder. The pouring process includes the following steps: cleaning and mounting mold, smearing grease, mixing the material in a stirrer, pouring, curing and demolding. The present invention has even poured thickness, compact structure, high strength at high temperature and high heat shock stability.

Description

technical field [0001] The invention relates to a refractory material, a casting process and a special mould, which are used in molten iron tanks in iron and steel enterprises. Background technique [0002] Large-scale iron and steel enterprises have many molten iron tanks, and the annual amount of molten iron transported is huge. The quality of the refractory material at the bottom of the tank and the pouring process will directly affect the service life and operating rate of the molten iron tank. At present, the refractory material used at the bottom of the molten iron tank is ordinary cement-bonded castable, which is manually poured by simple ramming and smearing methods. Therefore, during the construction process, there are disadvantages such as high water content of castables, low medium and high temperature strength, non-compact structure, large line changes, high labor intensity of workers and low service life. According to the statistics of Panzhihua Steel Plant, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B28B1/093B28C5/08B28B11/24B28B7/22C04B14/30C04B14/04C04B35/10B22D41/02
Inventor 陈涛张弟富姚增元陈桂卫郑德明
Owner CHEMIAL PLANT GANGCHENG ENTERPRISE GENERAL PANZHIHUA IRON & STEEL GROUP
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