The tar recarburizer is calcined in a forge, which is technically feasible, and companies in the same industry have many years of production experience. From the perspective of economic benefits, it also opens up new ways for enterprises to increase their economic income. At the same time, the company adjusted its product structure and gradually accumulated experience in the development of high-grade recarburizers. The meeting requested the recarburizer plant to actively and steadily advance this work. The new smelting process of adding recarburizer is superior to the traditional large proportion of pig iron in terms of cost and finished product performance. In the furnace charge, steelmaking recarburizers of different specifications must be added according to the demand. With time, the temperature in the furnace has reached the required cast iron melting temperature, and then the recarburization is completed. Usually, as long as you grasp the size of the participating particles, the organization of the time, the temperature control, etc., the average absorption rate can reach more than 90%, provided that you have to choose practical products. Medium temperature asphalt

Usually after the charge is completely dissolved, the slag is removed, and then the recarburization is added. Through the mixing effect, it can be dissolved in the molten iron extremely well, and the recarburization treatment can be better completed in 10-20 minutes. After the furnace charge is completely dissolved, when the temperature reaches 1350-1400 degrees, through sampling and analysis, if the molten iron contains a lot of carbon, the liquid surface should be removed, and nearly 50% of the furnace should be poured out, and the carbon increase will be added to the liquid surface in the furnace. , And then pour the molten iron into the ladle back into the furnace, and do a test when the molten iron is poured back.

Thermal shock resistance" refers to the rupture resistance of coke products when they are subjected to a thermal shock caused by a sudden rise to a high temperature or a rapid cooling from a high temperature. Needle coke products have good thermal shock resistance, and therefore have a higher use value. The coefficient of thermal expansion represents this performance. The lower the coefficient of thermal expansion, the better the thermal shock resistance.

High quality calcined coke recarburizer

The relative content of powder coke and lump granular coke (usable coke) contained in reaction coke. Most powder coke is crushed by mechanical action such as squeeze friction during decoking and storage and transportation, so its amount is also a manifestation of mechanical strength. After the green coke is calcined, the mature coke can be prevented from being broken. Coke with more granular coke and less powder coke has higher use value.

Petroleum coke quality standard SH/T0517-1992, Sinopec announced the 4A and 4B indicators on January 1, 2011.

Element 1st grade 1A 1B 2A 2B 3A 3B

Sulfur content is not more than 0.5% 0.5% 0.8% 1.0% 1.5% 2.0% 3.0%

Volatile content is not more than 12% 12% 14% 14% 17% 18% 20%

Ash content is not more than 0.3% 0.3% 0.5% 0.5% 0.5% 0.8% 12%

Moisture 3% 3% 3% 3% 3% 3% 3%

The true density is not more than 2.08% 2.13% 2.13%

Powder coke amount 25%

Silicon content 0.08%

Vanadium content 0.15%

The iron content 0.08% meeting agreed that the cast steelmaking requirements for recarburizers, high-quality recarburizers have high fixed carbon content, low sulfur content, stable recarburization effect, and high carbon absorption rate. It can be used to increase the carbon of cast steel and cast iron smelted in various electric furnaces, bringing considerable economic benefits to production. The amount of cast recarburizer is determined according to the ratio of other raw materials and the carbon content. The characteristics of the recarburizer itself choose pure carbon-containing graphitized substances to reduce excessive impurities in the pig iron, and the appropriate selection of the recarburizer can reduce the production cost of castings.