The production of qualified carburizing agent must go through strict material selection, and then through high temperature graphitization treatment, in the process of not only sulfur, gas (nitrogen, hydrogen, oxygen >, ash, volatile, moisture and other impurities reduce, its purity will be improved.

Refractory mud preparation: the phosphate fire mud and graphite powder according to the ratio of 2:1 poured into the mud hopper, the powder has lumpy particles or debris must be cleaned, evenly stirred and diluted with 20% water, mixed evenly, and covered with plastic paper to prevent dust, debris, etc. from entering the refractory sludge.

The use of carburizing agent should try to put the carburizing agent in the lower part of the furnace, plus other charges. This can reduce the carburant spillover, but also improve the carburant and liquid iron contact surface, so as to improve carburizing efficiency.

Tudish nozzles: The material of tundish nozzles is selected according to the type of steel poured, when pouring general carbon steel, you can use mullite nozzle containing Al2O3 70~75%.

Adding molybdenum to steel can make steel have uniform fine crystal structure and improve the hardenability of steel, which is conducive to eliminating tempering brittleness.

The hardness, strength, wear resistance, ductility and machinability of steel can be significantly improved by adding vanadium iron into steel.