Fabricated part for coal water slurry pressurization gasification furnace and production method thereof

Abstract

The invention relates to a fabricated part for a coal water slurry pressurization gasification furnace and a production method thereof. The technical scheme is as follows: the production method comprises the following steps of: by utilizing 40-70wt% of electric melting chromium oxide particles, 10-25wt% of fused zirconia alumina particles, 5-20wt% of electric melting chromium oxide fine powder, 2-10wt% of alumina micro powder, 3-10wt% of monoclinic zirconium oxide micro powder and 1-10wt% of chromium oxide green micro powder as raw materials, mixing the raw materials, and then, adding 0.5-3wt% of pure calcium aluminate cement, 0.1-0.8wt% of isobutylene polymer, 0.1-0.2wt% of a gather carboxylate water-reducing agent and 2-6wt% of water; and uniformly stirring, vibrating to form, curing at 20-50 DEG C for 1-2 days, demoulding, drying and sintering at 1400-1600 DEG C in the air. The preparation method is simple and low in production cost; and the fabricated part for the coal water slurry pressurization gasification furnace produced by the method has a long service life, high strength and excellent thermal shock resistance and corrosion resistance.

Description

Technical field [0001] The present invention is a technical field of refractory materials, which specifically involves a prefabricated piece and its preparation method for a coal plasm pressure compression furnace. Background technique [0002] In recent years, international oil prices have risen, and the chemical industry with coal as raw materials has gradually shown competitive advantages.Therefore, my country's gasification technology has developed rapidly, and at the same time, it has also put forward higher requirements for refractory materials for water -coal plasma pressure gasification furnaces. [0003] Due to harsh conditions, high temperatures, high pressure, and severe erosion of coal stabs in the pumping gasification furnace, the refractory material for the internal lining of water and coal plasma compression furnace has always been a research hotspot of scientific researchers. [0004] The patented technology of the preparation of chromium -chromium bricks for the ...

AI Technical Summary

Problems solved by technology

However, this method has the following defects: (1) The machine press molding process is complicated, and the labor cost and mold loss are relatively large

(2) The brick joints of shaped products are severely eroded during use, which greatly reduces the service life of bricks

Using castables instead of stereotyped bricks "Development and application of special castables for gas furnaces" ("Nitrogen Fertilizer" periodical, May 2002, No. 3) technology, as the lining material of gas generator can improve the life of the furnace body and produce a large Economic benefits, but the use conditions of the coal-water slurry pressurized gasifier are harsher than those of the coal gasifier, the strength of the aluminum-silicon castable is low, and the corrosion resistance performance cannot meet the use conditions of the coal-water slurry gasifier