Method for preparing ladle liner permanent layer by adopting perlite composite insulation board

A technology of thermal insulation board and perlite is applied in the field of using perlite composite thermal insulation board to prepare the permanent layer of ladle lining, which can solve the problem that it is difficult to achieve continuous casting process, the temperature gradient of molten steel pouring is narrow, the service life of permanent layer lining is not long, and the The reduction of shell strength and creep resistance can achieve the effect of prolonging the argon blowing time and waiting time, reducing liquid metal crusting, and increasing the packaging age.
CN101768000BInactive Publication Date: 2012-05-30湖北兴冶特钢实业发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
湖北兴冶特钢实业发展有限公司
Publication Date
2012-05-30
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to a method for preparing a ladle liner permanent layer by adopting a perlite composite insulation board, which comprises the preparation of a perlite composite insulation board and the arrangement of the perlite composite insulation board on a ladle shell inner wall. The method for preparing the perlite composite insulation board comprises the following steps of: (1) evenlymixing 1 percent by weight of expanded perlite, 0.3-1.2 percent by weight of adhesive and 0.02-0.06 percent by weight of fiber materials under the stirring condition to obtain a mixture; and (2) putting the mixture in a die; pressuring and smoothening the surface; and then, hardening at 15-110 DEG C for 0.2-24h to obtain a perlite composite insulation board. The perlite composite material of the invention adopts environment-friendly natural materials which are nontoxic, tasteless and taintless and have low production cost, low price and good insulation performance; and the insulation board has the advantages of light capacity weight, small conductive coefficient, good stability, strong strength, convenient construction, and the like.
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Description

technical field

[0001] The invention relates to a method for preparing a permanent refractory layer of a ladle, in particular to a method for preparing a permanent layer of a ladle lining by using a perlite composite heat insulation board. Background technique

[0002] Modern steelmaking technology requires that the ladle is no longer a simple container for transportation and holding steel. The secondary refining and continuous casting of the ladle require the molten steel to stay in the ladle for a longer time and lower the temperature. This requires the use of more modern refractory materials for the ladle. To meet the stringent requirements of the process on the material. Generally, the permanent layer of ladle lining in steelmaking plants is integrally formed with castables or refractory materials such as carbon bricks. However, these refractory materials have a large thermal conductivity, which can easily lead to the following problems: 1. The temperature drop is fast....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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