Recarburizer

Carburizing agent (People's Republic of China ferrous metallurgy industry standard, YB/T 192-2001 steel carburizing agent) and cast iron carburizing agent, as well as some other added materials are also useful to carburizing agent, such as brake pad with additives, as friction materials. Carburizing agent belongs to the addition of steel, iron carburizing raw materials. High quality carburizing agent is an indispensable auxiliary additive in the production of high quality steel.

There are many kinds of raw materials of carburizing agent, and the production process is different. There are wood carbon, coal carbon, coke, graphite, etc., among which there are many small types under various categories. High quality carburizing agent generally refers to the carburizing agent after graphitization. Under high temperature conditions, the arrangement of carbon atoms is the microscopic form of graphite, so it is called graphitization. Graphitization can reduce the content of impurities in carburizing agent, increase the carbon content of carburizing agent, reduce the sulfur content.

Carburizing agent used in casting, can greatly increase the amount of scrap steel, reduce the amount of pig iron or do not use pig iron. The feeding method of electric furnace smelting, should be carburizing agent with scrap and other charges together into the, small dose of addition can choose to add on the surface of hot metal. But to avoid large quantities to the molten iron feeding, in order to prevent excessive oxidation and carburization effect is not obvious and the casting carbon content is not enough. The addition of carburizing agent, according to the ratio of other raw materials and carbon content to determine. Different kinds of cast iron, according to the need to choose different models of carburizing agent. Carburizing agent characteristics itself choose pure carbon graphitization material, reduce excessive impurities in pig iron, carburizing agent selection can reduce the production cost of casting.

The use of carburizing agents

In the process of smelting, due to improper batching or charging and excessive decarbonization, sometimes the carbon content in steel does not reach the requirements of the top period, then it is necessary to carburize the liquid steel. Common carburizing agents are carburizing pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder. When converter smelting medium and high carbon steel, petroleum coke containing few impurities is used as carburizing agent. The requirement of carburizing agent for top blow converter steelmaking is that fixed carbon should be high, ash, volatile and sulfur, phosphorus, nitrogen and other impurities should be low, and dry, clean, moderate particle size.