Medium Carbon Ferrochrome

Name: Medium Carbon Ferrochrome - China Medium Carbon Ferrochrome Manufacturers Suppliers Factory - ZhenAn
Brand: ZhenAn
SKU: 210646919

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Description

ZhenAn International Co., Limited is one of the most reliable manufacturers and suppliers of medium carbon ferrochrome in China. With abundant experience, we warmly welcome you to wholesale discount medium carbon ferrochrome in stock here from our factory. Quality products and reasonable price are available.

Products Description

Basic Information
Medium carbon ferrochrome is an iron alloy whose main components are chromium and iron. It is one of the main alloying agents used in the iron and steel industry. In addition to the main components of chromium and iron, it also contains carbon, silicon, sulfur, phosphorus and other impurities. Ferrochrome contains 55% to 75% of chromium, which can be divided into high carbon (4% to 10%C), medium carbon (0.5% to 4%C), low carbon (>0.15% to 0.5%C) and Micro carbon (≤0.15%C) ferrochrome. High-carbon ferrochrome is also called carbon ferrochrome, and medium, low and micro-carbon ferrochrome is also called refined ferrochrome.

Application field
Medium carbon ferrochrome is used to produce medium and low carbon structural steel, chromium steel, and alloy structural steel. Chromium steel is often used in the manufacture of gears, gear shafts, etc. Chromium-manganese silicon steel is often used in the manufacture of high-pressure fan blades, valve plates, etc.
Smelting process

There are two main smelting methods for medium-carbon ferrochrome: high-carbon ferrochrome refining method and electric silicon thermal method.
The high-carbon ferrochrome refining method is divided into refining high-carbon ferrochrome with chromium ore and refining high-carbon ferrochrome with oxygen. When high-carbon ferrochrome is used as chromium ore concentrate, the refining slag has a higher viscosity and a higher melting point, and the temperature in the smelting process must be higher. Therefore, the power consumption is high, the lining life is short, and the carbon content is not easy to drop.

Oxygen blowing medium-carbon ferrochrome: The equipment used for refining medium and low-carbon ferrochrome by oxygen blowing method is a converter, so it is called converter method. According to different oxygen supply methods, oxygen blowing can be divided into four types: side blowing, top blowing, bottom blowing and top and bottom combined blowing. Our country adopts the top-blown converter method. The oxygen blowing method is to directly blow oxygen into liquid high-carbon ferrochrome to decarburize it to produce medium and low-carbon ferrochrome. The main elements in high-carbon ferrochrome are chromium, iron, silicon, and carbon, all of which can be oxidized. The main task of oxidation blowing high-carbon ferrochromium is to decarburize and preserve chromium. When oxygen is blown into liquid high-carbon ferrochromium, since the content of chromium and iron accounts for more than 90% of the total alloy, chromium and iron are oxidized first, and then these oxides oxidize silicon in the alloy. Due to the oxidation of chromium, iron and silicon, the temperature of the molten pool increases rapidly, and the decarburization reaction develops rapidly. The higher the temperature, the more favorable the decarburization reaction, and can inhibit the oxidation reaction of chromium, and the lower the carbon in the alloy can be reduced. .

Smelting of medium and low carbon ferrochrome by electric silicothermal method: smelting medium and low carbon ferrochrome by electric silithermal method is carried out in a fixed three-phase electric arc furnace, self-baking electrodes can be used, and the lining of the furnace is made of magnesia bricks (dry build). The short service life of furnace lining is an important problem in the production of medium and low carbon ferrochrome. Due to the high smelting temperature (up to 1650 degrees Celsius), the lining life is generally short.
Smelting raw materials

Products Description

The raw materials for smelting medium and low carbon ferrochrome include chromium ore, silicon-chromium alloy and lime. Chromium ore should be dry and pure lump ore or concentrate powder, the higher the Cr2O3 content, the better, and the lower the impurity content, the better. The phosphorus content in chrome ore should not be greater than 0.03%, and the particle size should be less than 60mm. The silicon-chromium alloy should be broken, the particle size is less than 30mm, and there is no slag. Lime should be freshly burnt, and its CaO content should not be less than 85%.
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