Preparation of mains-frequency coreless induction furnace lining

Abstract

The invention relates to a compound method for coreless power frequency induction furnace, characterized in that 1) quarts sands with six relative continuous different sizes are matched rationally; 2) drying out curves is optimized, temperature rising rate is decreased in low temperature and it is increased in high temperature, heat insulation platform moves back; 3) thickness of heat insulation layer is reduced. Because of improved formula, optimized drying out curve, innovated furnace technique, rational anti-fire structure, abscission of furnace inner wall, which is smooth, is decreased and furnace life, which is more than six months, is improved to achieve 404 furnaces step by step. It can satisfy the assembly of anode which is required by 0.3 million ton electrolytic aluminum and the current production is three times original production. Because furnace is built 6-8 times every year the consume of human, resource, financial ability is decreased widely and safely operating of main frequency furnace is guaranteed so that the pollution to circumstance is decreased as the furnace building frequency is decreased and good economical and social benefits are generated.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a preparation method of a coreless induction power frequency furnace lining. Background technique [0002] my country began to use coreless induction power frequency furnaces in the 1950s. While conducting research on them, it also carried out research on furnace lining refractory materials, furnace charge formula, furnace building technology, and oven technology, and achieved certain results. The lining of the 3T coreless induction power frequency furnace for smelting cast iron is made of quartz sand widely distributed in nature, plus a certain amount of boric acid as a binder and sintered at high temperature. The age of the furnace not only affects the normal production of the workshop, but also restricts the cost of the workshop. Therefore, the way to extend the life of the lining of the coreless induction power frequency furnace has always been the focus and hot spot of dome...

AI Technical Summary

Problems solved by technology

Due to the unscientific baking curve, the lining of the furnace is seriously peeled off

And the oven takes a long time, which affects the normal work of the workshop

[0008] The third is that the furnace construction method of the power frequency furnace adopts the pneumatic pick to build the furnace, and all the work is completed within one day. This method leads to long working hours, fatigue of personnel, and insufficient ramming of the furnace material, resulting in a relatively low furnace life.

[0009] Fourth, the thickness distribution of the three-layer structure (sintered layer, transition layer, loose layer) of the lining refractory layer is unreasonable

it's very dangerous