High Carbon Ferro Chrome Production Process

High Carbon Ferro Chrome

High carbon ferro chrome is mainly used as an alloying agent in the production of high carbon steel such as ball steel, tool steel, and high steel. High carbon ferro chrome is used in the casting industry. High carbon ferro chrome is the raw material of low carbon ferro chrome, micro carbon ferrochrome, nitrided low carbon ferro chrome, and chrome metal.

high carbon ferro chrome lumps ferro chrome manufacturer

The chromium ore is the raw material of high carbon ferro chrome. Chrome ore resources are mainly distributed in Kazakhstan, South Africa, Zimbabwe, and other countries. China’s chromium ore resources are relatively poor and it is highly dependent on imports. However, China’s ferrochrome production accounts for 40% of the world’s production, and its production of high-carbon ferrochrome is large.

The Submerged arc furnaces are commonly used around the world to produce ferrochromium. When using submerged arc furnaces to produce ferrochromium, problems such as difficulty in electrode insertion, difficulty in slag extraction, low chromium recovery rate, high power consumption, and low product quality may occur. Many reasons lead to these problems. As a producer of ferrochrome, Zhenxin Metallurgy has been in the field of ferrochrome production for a long time and has sufficient experience. Today’s article summarizes the influencing factors of high-carbon ferrochrome, focusing on the analysis of the impact of each chemical component on the production of high-carbon ferrochrome. The influence of carbon ferrochrome, the influence of slag basicity on smelting, etc.

Factors Affecting the Production of High Carbon Ferro Chrome

Physical and chemical properties of charge

Electrical conductivity of high carbon ferrochrome charge

The resistance of the charge can not only convert electrical energy into heat energy, causing the temperature of the charge to rise, but also transmit electrical energy to the reduction zone.

When the resistivity of the charge is large, the resistance of the charge is high and the conductivity is low, which will result in low power input to the reduction reaction zone, thereby lowering the temperature of the reduction zone, resulting in insufficient reduction, thereby increasing the Cr2O3 content in the slag. And excessive resistivity will cause the electrode to be inserted too deep and damage the furnace bottom.

When the resistivity is small, the heat converted by resistance is small, the temperature in the furnace is low, and Cr2O3 is not easily reduced.

Melting properties of chromium ore

60% of the chromium element exists in the slag in unmelted form, resulting in a large loss of chromium. There are disadvantages to chromium ore being both too easy to melt and too difficult to melt.

The melting point of high carbon ferrochrome is above 1500°C. In order to achieve better separation of slag and iron, the melting point of slag needs to be controlled above 1650°C.

Smelting temperature

The higher the smelting temperature, the higher the power consumption. With the increase of the temperature of ferrochrome alloy, the chromium content and silicon content in the alloy first increased and then decreased, and the chromium content in the alloy reached the maximum value at 1650℃.

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