Branch iron runner castable material

Abstract

The invention relates to a branch iron runner castable material. The branch iron runner castable material comprises a main material and an additive. The main material comprises, by weight, 5-8 parts of magnesium titanate with particle sizes of 3-5mm, 15-20 parts of chromium nitride with particle sizes of 5-3mm, 15-20 parts of sillimanite with particle sizes of 3-1mm, 8-15 parts of calcium chromite with particle sizes of 1-0mm, 2-5 parts of clay-like powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of alumina micro-powder, 1-5 parts of iron magnesium oxide powder, 1-3 parts of Rho alumina and 1-5 parts of fused pure calcium aluminate cement. Based on the total weight part of the above main materials, a weight part of calcium lignin sulphonate is 0.1-0.2, a weight part of nanometer potato powder is 0.01-0.05, a weight part of malic acid is 0.01 and a weight part of C12H14N4O5S2 is 0.1. A blast furnace iron runner prepared from the castable material has the characteristics of good thermal shock resistance, corrosion resistance, large iron influx and long service life.

Description

technical field [0001] The invention relates to a casting material for a support iron ditch, which belongs to the field of refractory materials for metallurgy. Background technique [0002] Most of the existing iron channel castables are Al 2 o 3 -SiC-C castables, but ordinary Al 2 o 3 -SiC-C iron trough castables are used in blast furnaces, and the amount of iron passing through at one time is about 120,000 tons. With the strengthening of smelting, the demand for increasing the output of molten iron is becoming more and more prominent, and the need for a large amount of iron to be passed through the iron channel at one time is also becoming more and more urgent. However, due to the poor corrosion resistance and thermal shock resistance of the iron channel at present, thermal spalling has occurred. And structural spalling is an important reason for the short life of the support iron ditch. [0003] CN102101782A discloses a casting material for iron trench, which is comp...

AI Technical Summary

Problems solved by technology

However, this kind of castable with brown corundum as the main component has poor thermal shock resistance, which easily leads to thermal spalling and structural spalling, which greatly increases the frequency of iron trench repair operations and brings great hidden dangers to the stable and safe production of blast furnaces. In addition, sol The viscosity is relatively high, the price is relatively expensive, and it is not easy to construct, so it still needs to be improved

Images