Low carbon magnesium carbon brick containing B4C-C composite powder and nano TiC powder, and method of manufacturing the same

Abstract

The invention belongs to the technical field of low carbon magnesium carbon brick fire proof materials, in particular to a low carbon magnesium carbon brick containing B4C-C composite powder and nanometer TiC powder and a preparation method thereof. The adopted technical proposal comprises: mixing 60-75wt percent magnesia particles, 15-30wt percent magnesia fine powder, 1-5wt percent coarse-grained squama graphite, 1-5wt percent thin-grained squama graphite, 0.5-1.5wt percent carbon soot, 1-3wt percent metal aluminium powder, 1-3wt percent metal silicon powder, 0.1-1.0wt percent B4C-C composite powder and 0.05-0.4wt percent nanometer TiC powder, additionally adding 3-5wt percent organic bond, press forming after calendaring, and heat treatment 24 hours under the condition of 180 DEG C to 240 DEG C. The carbon content of prepared carbon magnesium carbon brick is less than 6 percent, and the carbon magnesium carbon brick has the characteristics of obvious antioxidant effect, strong high temperature strength, good thermal shock resistance, strong anti-slag corrosion and low cost.

Description

technical field [0001] The invention belongs to the technical field of low-carbon magnesia-carbon brick refractory materials. In particular, a B-containing 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon brick and a preparation method thereof. Background technique [0002] With the advancement of smelting technology, traditional magnesia-carbon bricks can no longer meet the requirements of smelting some special steel types (such as ultra-low carbon steel), so the development and application of low-carbon content magnesia-carbon brick materials have received extensive attention. With the reduction of carbon content, not only the oxidation resistance of magnesia carbon bricks can be improved, but also the problem of carbon increase in the clean steel smelting process can be effectively solved. The reduction of carbon content in magnesia carbon bricks reduces the thermal conductivity of the bricks, which not only greatly reduces the energy consumption in...

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Problems solved by technology

But the synthesis of TiN is through N 2 In the atmosphere, the cost is relatively high; and in the use of the atmosphere, TiN will be combined with CO and N 2 The reaction produces precipitation, which is detrimental to the material properties

[0006] "A magnesia-carbon brick containing titanium carbonitride and its preparation method" (publication number: CN 1944346A) introduces the use of titanium carbonitride to improve the performance of magnesia-carbon bricks, but the synthesis of titanium carbonitride is carried out through N 2 Under the atmosphere, the cost is also relatively high