What is coal recarburizer

Calcined coal recarburizer not only meets your requirements for carbon content, but also effectively controls the amount of sulfur, so that most of the microscopic forms of carbon in the castings appear in A-type graphite, resulting in fine and uniform graphite, which promotes the incubation and spheroidization process , Effectively improve the iron-graphite system and reduce the production of iron-cementite; in addition, due to the high carbon and low sulfur, it can be fully absorbed without slagging, reducing the cost of spheroidization and slag removal process, shortening the smelting cycle, and saving energy consumption.

In the smelting process of iron and steel products, due to factors such as smelting time, holding time, and longer overheating time, the smelting loss of carbon in the molten iron increases, resulting in a decrease in the carbon content in the molten iron. The carbon content in the molten iron does not reach the theoretical value expected for refining. The carbon-containing substances added in order to supplement the carbon content in the steel smelting process are called calcined coal recarburizers. Calcined coal recarburizers can be used as cast iron. There are many materials for calcined coal recarburizers, commonly used are artificial graphite, calcined petroleum coke, graphite, coke, anthracite and mixtures of these materials.

Calcined coal recarburizer is an additive used in steelmaking. It is the raw material for the production of high-quality steel. In addition, it is also a raw material for the production of electro-paste. The use of coal-based calcined coal recarburizer can greatly increase the amount of scrap steel, reduce the amount of pig iron or not use pig iron in the production of castings. In the electric furnace smelting, put the calcined coal recarburizer in the middle. Coal recarburizer) added measure is 1-3% of the amount of metal. Calcined coal recarburizer is characterized by good carbon absorption in molten iron and does not return slag. The use of calcined coal recarburizer can greatly reduce the production cost of castings.

Conventional particle size of calcined coal recarburizer:

Section A: 0-1mm, 0.5-1.5mm, etc.;

Section B: 1-3mm, 0-5mm, 1-5mm, 3-5mm, 3-8mm, etc.;

Section C: 30-50mm, 50-80mm, 60-100mm, etc.,

The scope of application of each particle size:

Calcined coal recarburizer is used in different smelting processes and equipment, among which the A granularity section is suitable for (cupola and electric furnace) the molten iron in front of the furnace and the latter is recharged in the furnace; the B granularity section is suitable for normal induction electric furnaces In-furnace recarburization; C granularity section can be suitable for smelting recarburization in cupola furnace.

Advantages of calcined coal recarburizer:

1. Pure chemical composition: high carbon, low sulfur, micro nitrogen, less harmful impurities

2. Physical form: clean appearance, no impurities, porous structure, fast absorption rate, high absorption rate

3. Microscopic morphology: excellent quality of crystallinity, effective cast iron grade and performance

4. Stable product properties: stable carbon increase effect, good absorption effect, obvious temperature raising effect, no slag return