Raw materials of carburant | low sulfur petroleum coke

Petroleum coke carburizers use low-sulfur petroleum coke as the main raw material, and low-sulfur petroleum coke is mainly used in three relatively high-end fields: carburizers, graphite electrodes, and negative electrode materials. Carburizers are mostly used in steelmaking and foundry industries to supplement the carbon content lost during steel smelting. In steelmaking, it is mainly used in ladles to increase carbon, which is an important means of smelting medium and high carbon steels. Commonly used recarburizers include high-quality pig iron, etc.

In casting, graphitized high-carbon and low-sulfur products are generally used when smelting ductile iron. When smelting gray iron, the main materials are non-graphitized petroleum coke, calcined coal, etc., and the sulfur is generally controlled at about 0.5%.

Why use low sulfur petroleum coke in foundry industry

High-quality carburizer is an essential auxiliary additive for producing high-quality steel. Therefore, carburizers with low-sulfur petroleum coke as the main material are widely used.

(1) Carburizer is an auxiliary material used in steelmaking and foundry industries for carburization and desulfurization. It is the most widely used in the iron and steel smelting industry. In the smelting process of iron and steel products, due to factors such as smelting time, holding time, and long overheating time, the smelting loss of carbon in molten iron increases, resulting in The carbon content in the molten iron is reduced, resulting in the carbon content in the molten iron not reaching the expected theoretical value of refining. The recarburizer is an additional carbon-increasing raw material for steelmaking and iron-making, which is to supplement the carbon content lost by burning during the steel smelting process.

(2) The calcined petroleum coke recarburizer is a product obtained by placing low-sulfur petroleum coke in a calciner and calcining at a high temperature of 1300°C to remove impurities such as moisture, ash and volatile components in the petroleum coke. The appearance of calcined petroleum coke is black or dark gray hard solid, which has metallic luster and is porous. The components of calcined petroleum coke are hydrocarbons, containing more than 98.5% carbon. Calcined petroleum coke recarburizer is widely used in industry. Calcined petroleum coke recarburizer can be used in steelmaking, ironmaking, general casting and other industries, and can also be used to make brake discs, crankshafts and brake pads on casting Wait.

Factors affecting the price of low-sulfur petroleum coke

The calcined petroleum coke recarburizer can not only make up for the burning loss of carbon in the process of iron and steel smelting, but also can be used for post-furnace adjustment.

(1) As an important raw material for melting molten iron in an induction furnace, its quality and usage directly affect the state of molten iron. The petroleum coke carburizer uses low-sulfur petroleum coke as the main raw material. In the past two years, with the rise of the negative electrode industry, the supply of low-sulfur coke has appeared. Serious diversion, the price has risen even higher.

(2) Mining costs, transportation costs, supply and demand balance, output, etc. are all key factors affecting prices. However, the factor that directly affects the price of calcined petroleum coke is the demand for downstream graphite electrodes. Compared with uncalcined petroleum coke, impurities such as moisture and volatile matter in calcined petroleum coke are less after the calcination process, the carbon content is higher, and the sulfur content is greatly reduced, so the price of calcined petroleum coke is also relatively higher.

Petroleum coke recarburizers are smelted through multiple processes. Because the process is more complicated, the production cost also leads to high quotations for petroleum coke recarburizers, but petroleum coke recarburizers are still Ideal smelting material in casting process, widely used in the market.