| Iron trough, as a kind of amorphous refractories, is the main blast furnace refractories with dosage of refractories more than 70 percent. The performance, life of iron trough and flux of iron directly affect the cost of refractories, labor intensity and working conditions. In fact, in Chongqing Steel Company, there were some problems such as low life, small flux of iron and so on. In this paper, in order to solve these problems there were some research on iron trough. The cooperation of iron erosion, molten iron eroding, thermal shock and high-temperature will reduce the life of iron trough and the flux of iron. In this paper, the effects of alumina, silicon carbide, carbon materials and various additives and the impact of comprehensive performance were studied. In order to improve the slag resistance, anti-erosion, thermal shock resistance and oxidation resistance of iron trough, a new sol-binded Al2O3-SiC-C material was used in this paper. By repeated tests the best ratio of the material was determined. The crystalline structure, composition and morphology of the materials were tested and analyzed by X-ray fluorescence analysis, analysis of polarizing microscopy, scanning electron microscopy. The test results show that mullite composed by aluminum micronization and silicon micronization can improve the thermal shock resistance, at the same time, better antioxidant and grade of silicon nitrification can increase the oxidation resistance and the slag resistance of the materials separately. Otherwise the improving structure of iron trough by using silicon gel as the substitution of cement can enhance the performance at high temperature. At last, flux of iron was improved by using the new iron trough. The results show that the slag resistance, anti-erosion, thermal shock resistance and oxidation resistance of Al2O3-SiC-C iron trough with sol were improved obviously. For example, the flux of iron was 163000 tons, which was enhanced 60 percent than the former.
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