Method for manufacturing refractory clay for constructing refractory bricks of flame path walls of baking furnaces

Abstract

The invention provides a method for manufacturing refractory clay for constructing refractory bricks of flame path walls of baking furnaces. Raw materials for manufacturing the refractory clay are obtained from mixing four or more than four of bauxite chamotte I, bauxite chamotte II, bauxite chamotte III, mullite chamotte, alumina powder and high-quality porcellanite, and adding mixture of two or more than two of sodium carboxymethylcellulose, sodium tripolyphosphate, sodium hexametaphosphate and yellow dextrin, wherein the bauxite chamotte I, the bauxite chamotte II and the bauxite chamotte III are different in finenesses and Al2O3 contents. The method includes the steps of weighing, stirring, sealing and packing the raw material mixture in bags; when in construction of the refractory bricks on the construction site, adding the mixture into a slurry mixer, weighing and adding 33-38 weight parts of clean tap water into every 100 weight parts of mixture, and fully stirring for at least 10 minutes. Thickness of the refractory clay is determined for the convenience of utilization. The method for manufacturing the refractory clay for constructing the refractory bricks of the flame path walls of the baking furnaces is simple in process and low in cost, the refractory clay manufactured is high in bonding strength and strong in fire retardance under the conditions of low temperature, middle temperature and high temperature, and the flame path walls constructed are firm, durable and long in service life.

Description

technical field [0001] The invention belongs to the technical field of roasting furnaces for sintering anode carbon products, and in particular relates to a method for preparing refractory mud for building refractory bricks for flue walls of roasting furnaces. Background technique [0002] The anode carbon products used in the aluminum electrolytic cell are fired in a roasting furnace. For the roasting furnace used for roasting, refractory mud is used for the refractory bricks of the flue wall part of the roasting furnace. The roasting temperature of the roasting furnace is generally It exceeds 1200°C or even higher, so the refractory mud needs to have higher bonding strength and higher refractoriness at low, medium and high temperatures. At present, most of the refractory mud of the flue wall of the roaster is clay-based refractory mud, and its Al 2 o 3 The content is between 45% and 48%, and the production process is simple. When building refractory bricks, the bonding s...

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Problems solved by technology

[0003] In view of the above-mentioned defects, the present invention relates to a preparation method of refractory mud for building refractory bricks in the flue wall of a roasting furnace, so as to solve the problem of low bonding strength and poor refractoriness of the refractory mud in the prior art at low temperature, medium temperature and high temperature. Defects that lead to refractory mud falling off and deformation and damage to the flue wall

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