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Carburant Reduce Excess Impurities In Pig Iron

Henan Xinxin Silicon Alloy Co.,Ltd | Updated: Jul 11, 2017

The use of Carburant in the casting can significantly increase the amount of scrap, reduce the amount of pig iron or no pig iron. At present, the vast majority of Carburant are suitable for electric furnace smelting, there are a small part of the absorption rate is particularly fast carbonizer for cupola. Electric furnace smelting of the feeding method, the carbon agent should be with the scrap and other materials into the inside together, the addition of small doses can be added to the surface of the molten iron. But to avoid large quantities of molten iron to feed, in order to prevent excessive oxidation and the effect of carbon is not obvious and the cast carbon content is not enough. The addition of carbon agent, according to the ratio of other raw materials and carbon content to be set. Different types of cast iron, according to the need to choose different types of carbon agent. The characteristics of the carbon agent itself choose pure carbon-containing graphitizing substances, reduce excess impurities in pig iron, the choice of carbon agent can reduce the cost of casting production.

In the smelting process, due to improper ingredients or improper loading and decarbonization and other reasons, sometimes caused by steel or iron in the carbon content does not meet the expected requirements, then to the steel or iron liquid by carbon. The main substances commonly used to increase carbon are anthracite pulverized coal, carbonized pig iron, electrode powder, petroleum coke powder, asphalt coke, charcoal powder and coke powder. The requirements of the carbon agent is, the higher the better the fixed carbon content, ash, volatile and sulfur and other harmful impurities, the lower the better, so as not to pollute the steel. Casting smelting with the use of magazines with little oil coke after high temperature after the high-quality carbon agent, which is the most important part of the carbon process. The quality of the carbon agent determines the quality of the molten iron is good or bad, but also determines whether the good graphitization effect. In short, to reduce the iron liquid shrink carbon agent plays a decisive role.

When the whole scrap steel furnace is smelted, it is preferable to use the carbonizing agent after the graphitization treatment. After the high temperature graphitization treatment, the carbon atoms can be changed from the original disordered arrangement to the flaky arrangement, and the flaky graphite can become graphite The core of the core is to facilitate the graphitization. Therefore, we should use the high temperature graphitization of the carbon agent. Since the high-temperature graphitization treatment, the sulfur content is reduced by the generation of SO2 gas. Therefore, high-quality carbon agent containing sulfur is very low, w (s) is generally less than 0.05%, better w (s) or even less than 0.03%. At the same time, it is also an indirect indicator of whether or not it is subjected to high temperature graphitization and whether or not graphitization is good. If the selected carbonizer is not subjected to high temperature graphitization, the nucleation ability of graphite is greatly reduced and the graphitization capacity is weakened, even if the same amount of carbon can be achieved, but the result is completely different.

(Carbon steel industry in the People's Republic of China standard, YB / T 192-2001 carbon steel with carbon agent) and cast iron with carbon agent, and some other added materials are also useful to carbon agent, such as brake Tablets with additives, for friction materials. Carburant are added to the steel, iron and carbon increased raw materials. High-quality carbon agent is essential for the production of high-quality steel auxiliary additives.

There are many kinds of raw materials for Carburant, there are different production processes, there are wood carbon, coal carbon, coke, graphite and so on, which under the various categories and a lot of small species. High-quality carbon agent generally refers to the graphitization of the carbon agent, in high temperature conditions, the arrangement of carbon atoms in the micro-morphology of graphite, so called the graphitization. Graphitization can reduce the amount of impurities in the carbon agent, increase the carbon content of the carbon agent, reduce the sulfur content.

The use of Carburant in the casting can significantly increase the amount of scrap, reduce the amount of pig iron or no pig iron. Electric furnace smelting of the feeding method, the carbon agent should be with the scrap and other materials into the inside together, the addition of small doses can be added to the surface of the molten iron. But to avoid large quantities of molten iron to feed, in order to prevent excessive oxidation and the effect of carbon is not obvious and the cast carbon content is not enough. The addition of carbon agent, according to the ratio of other raw materials and carbon content to be set. Different types of cast iron, according to the need to choose different types of carbon agent. The characteristics of the carbon agent itself choose pure carbon-containing graphitizing substances, reduce excess impurities in pig iron, the choice of carbon agent can reduce the cost of casting production.