A liquid grouting material for thermal repair of coke oven wall cracks and its preparation method and use method

Abstract

The invention discloses a liquid grouting material used for coke oven furnace wall crack hot repairing, and a preparation method thereof. The liquid grouting material used for coke oven furnace wall crack hot repairing is composed of, by mass, 100 parts of water glass, 100 to 250 parts of a solid filling material, and 9 to 16 parts of an additive. The solid filling material is composed of, by mass, 50 to 70% of mullite, 20 to 30% of refractory clay, and 10 to 20% of quartz sand. The additive is composed of a dispersant, a penetrant, and an antifoaming agent. According to the preparation method, the additive and the solid filling material are added into a water glass solution successively for uniform mixing so as to obtain the liquid grouting material used for coke oven furnace wall crack hot repairing. The liquid grouting material used for coke oven furnace wall crack hot repairing is convenient for pumping, possesses excellent cohesiveness with refractory material to be repaired, is wide in curing sintering temperature range, and is convenient for construction; the raw materials are cheap and easily available; no harm on human body is caused; the preparation period is short; the preparation method is simple; production cost is low; the production process is friendly to the environment; no pollution is caused; and large scale production can be realized.

Description

technical field [0001] The invention relates to a liquid grouting material for hot repair of coke oven wall cracks, a preparation method and a use method, especially a heat-resistant high-strength non-shrinkage grouting material used in a high-temperature environment, which can be widely used in high-temperature facilities such as coke ovens The filling and repairing of wall cracks belongs to the coking field in the metallurgical coal chemical industry. Background technique [0002] In the long-term use of coke oven, it is affected by high temperature, mechanical and physical and chemical reactions, and the furnace body always tends to be gradually aging and damaged. After the start of production, due to the temperature shock of sudden changes in cold and heat caused by operations such as opening and closing of the furnace door, coal loading and coking, mechanical collision, extrusion, friction, and the erosion of certain harmful substances in the gas, various parts of the f...

AI Technical Summary

Problems solved by technology

If effective control measures are not taken in time, it will not only affect the normal operation of the blast furnace, reduce the working life of the blast furnace, and affect the output; but also have a bad impact on the surrounding environment, endangering the health and personal safety of the surrounding workers.

[0004] In Chinese patents CN101654354 B and CN101597497 B, diethylene glycol ethyl ether acetate and glyceryl triacetate are respectively used as curing agents. After curing with water glass, the serous calculus rate is low, and a certain proportion of water remains in the upper part of the calculus body; the serous The stone body is in the form of white powder, and the cementation strength of the pure stone body is almost non-existent; after the stone body is solidified, it is easy to lose water and shrink, and the water loss shrinkage rate can reach more than 80%, resulting in poor effect; the curing agent has a strong smell and is harmful to the respiratory tract. It is very irritating, and various disadvantages prevent it from being the first choice for high-temperature furnace body grouting materials

Put the above-mentioned repair material into the pit to be repaired at the bottom of the heating furnace in normal operation with a hopper or shovel on site. After 3-4 hours of sintering, the repair material of the heating furnace and the refractory material at the bottom of the furnace are sintered into a whole. Normal use; due to poor fluidity and long sintering time, it is only suitable for repairing the pits on the bottom surface of the heating furnace, but not suitable for bonding and repairing fine cracks in the coke oven body