Low-thermal-conductivity brick for rotary cement kiln and production and manufacturing method of low-thermal-conductivity brick

Abstract

The invention belongs to refractory materials and production methods thereof, and particularly relates to a low-thermal-conductivity brick for a rotary cement kiln and a production and manufacturing method of the low-thermal-conductivity brick. The production method of the low-thermal-conductivity brick comprises the following steps that magnesia particles, magnesium aluminate spinel particles, spinel fine powder and magnesia fine powder are mixed, then a binding agent is added to prepare pug, the pug is pressed into a green body, the green body is dried and fired in a high-temperature tunnelkiln to obtain a main body refractory brick, the main body brick is placed on an operating platform, and is clamped by a grinding tool, a steel mesh meshes with the main body brick, the binding agentis added into a heat insulator raw material for mixing, then a castable is poured into the grinding tool according to a specified amount, vibrating and molding is conducted, demolding is conducted after 24 hours, then drying is conducted to 350 DEG C, and then packaging is conducted after cooling. The low-thermal-conductivity brick for the rotary cement kiln and the production and manufacturing method of the low-thermal-conductivity brick have the advantages that the problem of Cr < 6 + > public nuisance pollution of the magnesite-chrome brick of the rotary cement kiln is solved, meanwhile, the temperature of a cylinder of the rotary cement kiln is reduced, the service life of the brick for a transition zone of the rotary cement kiln, which is utilized in multiple aspects, is prolonged, and meanwhile, the energy and equipment consumption is reduced.

Description

technical field [0001] The invention belongs to a refractory material and a production method thereof, in particular to a low thermal conductivity brick for a cement rotary kiln and a production and production method thereof. Background technique [0002] Due to the use of magnesia-chrome bricks in cement dry normal line rotary kilns, part of the chromium in magnesia-chrome bricks will change from "Cr 3+ " into the highly toxic and carcinogenic "Cr 6+ ", damage the environment and affect people's life and health. Therefore, chrome-free refractory products are the trend and development direction of alkaline materials for cement kilns. At the same time, the cement industry, as an important building materials industry, bears the brunt of the pressure of energy conservation and emission reduction. On the one hand, it faces On the other hand, the national and local standards for reducing energy consumption are constantly increasing, and on the other hand, it is the inherent requ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a solution to the problems referred to above 6+ Low thermal conductivity brick for cement rotary kiln with reduced temperature of cement rotary kiln cylinder and production and manufacturing method thereof

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