Fire-proof pouring material of iron tap channel of blast-furnace and production thereof

Abstract

A fire-proof pouring material for blast-furnace iron tap channel and its production are disclosed. The pouring material consists of industrial schmigel, SiC fines, high-temperature asphalt superfine powder, alumina or calcium aluminate cement, a-Al2O3 superfine powder, SiO2 superfine micro-powder and metal silicon. The process is carried out by taking sodium tripolyphosphate or calgon or aluminum powder as additives, adding into aluminous fly ash, agitating, mixing, obtaining the pouring material, adding into 3-7% water, agitating, mixing, adding into mould, vibrating for vibrating bar or plate, naturally hardening and drying, demoulding, drying at 80-700 Deg C., heat treating and removing moisture. It costs low and has good availability.

Description

technical field

[0001] The invention relates to a high-temperature-resistant material for a tap trough pouring material used in an iron-making blast furnace tap trough under high-temperature conditions, and belongs to the technical field of refractory materials. Background technique

[0002] Fly ash is a large amount of waste discharged from fluidized bed boilers in large and medium thermal power plants. It is the fine ash collected by the dust collector after the pulverized coal that has been ground into a certain fineness is burned at a high temperature in a fluidized bed boiler. It is called fly ash or fly ash abroad. It is an active substance whose main chemical composition is silicon dioxide (SiO 2 ), aluminum oxide (Al 2 o 3 ), a small amount of iron oxide (Fe 2 o 3 ) and calcium oxide (CaO) (when coal is burned without calcium-containing desulfurizer). Of which SiO 2 and Al 2 o 3 The content is the highest, and the sum of the two generally accounts for more t...