Blast furnace main iron channel castable

Abstract

The invention relates to a blast furnace main iron channel castable and belongs to the field of refractory castables. The blast furnace main iron channel castable comprises the following components in part by weight: 50-65 parts of tabular corundum, 10-15 parts of andalusite, 1-8 parts of alumina hollow ball, 3-10 parts of electric smelting zirconia, 10-25 parts of alumina micro powder, 10-15 parts of silicon carbide, 8-12 parts of ferro silicon nitride, 3-10 parts of alumina micro powder, 4-8 parts of alumina and silica sol composite suspension, 1-2 parts of nano ceramic powder, 0.1-0.3 part of mixture of sodium tripolyphosphate and sodium hexametaphosphate and 0.3-0.4 part of explosion-proof fiber. A blast furnace main iron channel prepared by the castable has the advantages of long service life, low melting loss rate and strong oxidation resistance.

Description

technical field

[0001] The invention relates to a castable for a main iron trough of a blast furnace, which belongs to the field of refractory castables. Background technique

[0002] The existing main iron trough castable is ordinary Al 2 o 3 -SiC-C castables, but ordinary Al 2 o 3 -SiC-C main iron ditch castable at 2500m 3 It is used on a blast furnace, and the amount of iron passing through at one time is 170,000 tons. With the strengthening of smelting, the need to increase production has become increasingly prominent, and the requirements for the amount of iron passing through the main iron trough at one time have become more and more stringent, but the amount of iron passing through is not ideal.

[0003] CN102101782 (2011-6-22) discloses a castable for main iron trough, the castable is composed of alumina, brown corundum, SiC, modified nano-carbon powder, SiO 2 Micropowder, calcium aluminate cement, α-A1 2 o 3 Micropowder, explosion-proof fiber, metal silicon ...

Images