Calcined Coal Carburizer - CAC
The calcined coal carburizer not only meets your requirements for carbon content, but also effectively controls the amount of sulfur element, so that most of the microscopic forms of carbon elements in castings appear as A-type graphite, obtaining fine, uniform graphite, and promoting incubation and balling. Chemical process, effectively improve the iron-graphite system and reduce the production of iron-cementite; in addition, due to high carbon and low sulfur, it can be fully absorbed without slag return, reducing the cost of spheroidization and slag removal processes, shortening the smelting cycle, and saving energy consumption .
In the smelting process of iron and steel products, factors such as long smelting time, holding time, and overheating time often increase the smelting loss of carbon in the molten iron, causing the carbon content in the molten iron to decrease, resulting in The carbon content in the molten iron cannot reach the theoretical value expected for refining. The carbon-containing substances added in order to supplement the carbon content during the steel smelting process are called calcined coal carburizers. Calcined coal carburizers can be used as cast iron There are many materials for calcined coal carburizer.
Calcined coal carburizer is an additive used in steelmaking. It is an essential raw material for the production of high-quality steel. In addition, it is also a raw material for the production of electrode paste. By using coal-based calcined coal carburizing agent, the amount of scrap steel can be greatly increased when producing castings, and the amount of pig iron can be reduced or eliminated. In electric furnace smelting, the calcined coal carburizing agent is placed in the middle (put a part of the material in the furnace and then put the calcined The amount of coal carburizing agent added is 1-3% of the metal content. The characteristic of calcined coal carburizing agent is that carbon absorbs well in molten iron and does not return slag. The use of calcined coal carburizing agent can significantly reduce casting production costs.
Conventional particle size of calcined coal carburizer:
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.
Applicable scope of each particle size:
The calcined coal carburizing agent is used in different smelting processes and equipment. The A particle size section is suitable for carburizing the molten iron in front of the furnace (cupola furnace and electric furnace) and the later carbon replenishment in the furnace (electric furnace); the B particle size section is suitable for normal induction electric furnaces. Carburizing in the furnace; C particle size section can only be used for carburizing in the cupola furnace.
Advantages of calcined coal carburizes:
1. Pure chemical composition: high carbon, low sulfur, micro nitrogen, and few harmful impurities
2. Physical form: clean appearance, no impurities, porous structure, fast absorption speed and high absorption rate
3. Microscopic morphology: Excellent crystallinity and quality, effectively improving the grade and performance of cast iron castings
4. Stable product properties: stable carburizing effect, good absorption effect, obvious warming effect, and no slag return.
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