Corundum durable moisturizing plastic material

Abstract

The invention discloses a corundum durable moisturizing plastic material which is low in cost, has long storage period and is prepared through a simple production process, and a preparation method thereof. The plastic material is prepared from the following raw materials in percentage by weight: 10-14 percent of 5-3 mm super alum, 20-30 percent of 3-1 mm super alum, 10-12 percent of white corundum particles, 7-9 percent of kyanite, 24-30 percent of white corundum powder, 7-9 percent of Guangxi mud, 2.5-3.5 percent of chrome green, 4.5-5.5 percent of binding agent and 3-4 percent of aluminum sulfate solution. The preparation method of the plastic material comprises the following steps: (1) pre-preparing the aluminum sulfate solution; (2) adding the kyanite, the white corundum powder, the Guangxi mud and the chrome green into a stirrer to mix according to the proportions; (3) adding the two super alums and the white corundum particles into the stirrer and stirring for 3-5 minutes, then adding fine powder to stir for 10 minutes, then adding the binding agent with the weight being 2 / 3 of the weight of the binding agent and discharging; (4) adding the remaining binding agent and stirring for 10-15 minutes after the mixture is aged for 48 hours, discharging and packaging.

Description

[0001] technical field [0002] The invention relates to a high-temperature wear-resistant refractory material, in particular to a corundum durable and moisture-retaining plastic. Background technique [0003] Refractory plastic is a mud or mud lump-shaped unshaped refractory material that is constructed by ramming, vibrating or extruding. It is composed of refractory materials with a certain particle size distribution, binders and admixtures plus water (or binder-containing liquid) mixed. Mainly used in various heating furnaces, soaking furnaces, annealing furnaces, sintering furnaces and electric furnace roofs in the iron and steel industry as linings. [0004] In recent years, large and medium-sized iron and steel enterprises in my country have used refractory plastics as a whole or partly on the working lining of the rolling steel heating furnace roof and furnace wall, which has improved the service life of the heating furnace and achieved good economic benefits. In th...

AI Technical Summary

Problems solved by technology

In the initial stage of the use of refractory plastics in my country, they are generally thermosetting refractory plastics, and liquid phosphoric acid or aluminum phosphate is mainly used as a binder. This kind of refractory plastics has high strength at room temperature and high temperature, but the cost is high and the shelf life is short.

Because the solution is easy to react with the iron in the fine powder, the hardening speed of the plastic is accelerated, the plasticity is reduced, and it is easy to expand after being pounded; for this reason, refractory researchers began to vigorously promote air-hardening refractory plastic in the 1990s. Aluminum sulfate is used as a binder. This kind of refractory plastic has good performance and relatively low cost, but its strength is low at room temperature and high temperature.