Carbon Raiser

Description

In the smelting process of iron and steel products, due to factors such as smelting time, holding time, and overheating time, the smelting loss of carbon in the molten iron increases. As a result, the carbon content in the molten iron is reduced, and the carbon content in the molten iron does not reach the theoretical value expected in refining. In order to make up for the carbon content burned during the iron and steel smelting process, the added carbon-containing substances are called Carbon Raiser.
 

Carbon Raiser China

 
According to the carbon raiser wikipedia, high-quality carbon enhancer, generally refers to graphitized carbon enhancer. Under high temperature conditions, the arrangement of carbon atoms takes the microscopic shape of graphite, so it is called graphitization.

Graphitization can reduce the content of impurities in the recarburizer, increase the carbon content of the carbon raiser, and reduce the sulfur content. The use of carbon additive during casting can greatly increase the amount of scrap steel, reduce the amount of pig iron or not.
 
By the Carbon Raiser China, different types of cast iron, choose different types of carburizers according to needs. The characteristics of the carbon additive, choose pure carbon-containing graphitization material, can reduce excessive impurities in pig iron. Choosing the right carburant can reduce the production cost of castings. Get carbon raiser price.
 

Types of Recarburizer

 
There are many materials that can be used as a recarburizer for cast iron. Commonly used are artificial graphite, calcined petroleum coke, natural graphite, coke, anthracite and mixtures made with such materials.
 
According to the material, the carburizing agent can be generally divided into: metallurgical coke carburizing agent, calcined coal carburizing agent, petroleum coke carburizing agent, graphitizing carburizing agent, natural graphite carburizing agent, composite carburizing agent.
 
The materials used for the carburizer mainly include graphite, graphite-like, electrode block, coke, silicon carbide and other materials. Commonly used electrode blocks and silicon carbide carburant have the advantages of high carbon content and strong oxidation resistance, but the production process is relatively complicated and the cost is high. Using coke powder and graphite as carbon-enhancing materials, the production cost is lower than materials such as electrode blocks, but the content of ash and sulfur is high, the carbon content is low, and the effect of carbon increase is not good.
 

Carbon Raiser Specification

 

Items	C %	S %	Carbon Raiser Uses
Metallurgical coke recarburizer	＜85	≈1	Cupola coke, metal charge increase carbon
Calcined coal recarburizer	90 ~ 93	0.3 ~ 0.5	Steelmaking, gray iron
Petroleum Coke Recarburizer	96 ~ 99	0.3 ~ 0.7	Steelmaking, gray iron, brake pads and cored wire, etc.
Graphitized carburizer	98 ~ 99.5	0.03 ~ 0.05	Ductile iron
Natural graphite carburant	65 ~ 99	-	Steelmaking
Composite carburizer	93 ~ 97	0.09 ~ 0.7	Temporarily unable to stabilize the added amount and sulfur content

 
 

The Roles of Carbon Raiser

 
Carbon Raisers are used in casting, cast iron, and cast steel. Castings will have a requirement for carbon, so the carburizing agent, as the name suggests, is to increase the carbon content in the molten iron. As another example, the commonly used furnace materials in smelting are pig iron, scrap steel, and furnace materials. Pig iron has a high carbon content, but the purchase price is much higher than scrap. Therefore, increasing the amount of scrap steel input, reducing the amount of pig iron input, and adding carbon additives can play a certain role in reducing the cost of castings.
 
The use of carbon raiser can not only make up for the burning of carbon in the iron and steel smelting process, but also ensure the carbon content of certain steel grades. It can also be used for post-furnace adjustment.
 
As an important raw material for melting molten iron in induction furnace, the quality and usage of carburant directly affect the state of molten iron. After adding slag and degassing treatment to the ladle, a specific brand of recarburizer can be added to adjust the carbon content in the ladle to achieve the goal of more than one package.
 

Carbon Raiser Uses

 
In the smelting process, due to improper ingredients or charging and excessive decarbonization and other reasons. As a result, the carbon content in the steel does not meet the expected requirements, and it is necessary to add carbon to the molten steel. Commonly used carburizers include carburized pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder.
 
When smelting high-carbon steel grades in a converter, petroleum coke with few impurities is used as a carbon enhancer.
 
The requirements for recarburizers for top-blown converter steelmaking are:
1. The fixed carbon is higher.
2. The content of ash, volatile matter and impurities such as sulfur, phosphorus, nitrogen should be low.
3. Dry, clean, and moderate particle size.
 
Its fixed carbon components are: w (C)> 96%, volatile matter≤1.0%, w (S) ≤0.5%, w (moisture) ≤0.55%, particle size is 1-5mm.
If the particle size is too fine, it is easy to burn, and if it is too coarse, it will float on the surface of the molten steel and will not be easily absorbed by the molten steel.
 
The particle size of the induction furnace is 0.2-6mm, and the particle size of steel and other ferrous metals is 1.4-9.5mm. High carbon steel requires low nitrogen, and the particle size is 0.5-5mm. The choice of carburant also needs to be determined and selected according to the details of the specific furnace type smelting workpiece type and other details.
 

Carbon Raiser Manufacturers in China

 
Carbon raiser manufacturers in China reminded carbon raiser buyers during the use of recarburizers. The charging method of electric furnace smelting should put the carburizing agent together with scrap steel and other furnace materials. Adding a small dose, you can choose to add on the surface of molten iron. However, it is necessary to avoid large-scale feeding into the molten iron to prevent excessive oxidation, and the situation that the carbon increase effect is not obvious and the carbon content of the casting is insufficient. The amount of recarburizers added depends on the ratio of other raw materials and carbon content. Welcome to buy carbon raiser.