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Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace

A production method and high-carbon ferrochromium technology, applied in the field of metallurgy, can solve problems such as high energy consumption, increase one-step production process, etc., and achieve the effects of reduced consumption, good product condition and simple production process

Active Publication Date: 2012-01-25
吉铁铁合金有限责任公司
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Problems solved by technology

This method uses high-carbon ferrochrome as a raw material, and adds a production process, which consumes a lot of energy.

Method used

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Embodiment Construction

[0019] Specific implementation plan

[0020] The present invention is further described as follows in combination with specific actual production conditions:

[0021] The production method of smelting low-silicon, low-titanium, high-carbon ferrochromium in submerged arc furnaces uses chromium ore, coke, and silica as raw materials, 700 kg of chrome ore with a particle size of 5-60 mm, and 131 kg of fixed carbon content of 85.89% with a particle size of 8-30 mm. Coke, 10 kg SiO 2 The content of 97% flux silica with a particle size of 10-30mm is automatically weighed and mixed by the raw materials in the storage bin according to the proportion, and then transported by the belt conveyor to the furnace top bin, and then added to the 12500KVA submerged arc furnace through the feeding tube; 1550~1750℃ for continuous smelting for about 2 hours. The molten iron temperature is 1620℃. Put the high-carbon ferrochromium alloy and slag into the ladle and slag ladle. After the slag is divided, t...

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Abstract

The invention discloses a production method of low-silicon low-titanium and high-carbon ferrochrome smelted by a submerged arc furnace, comprising: proportioning chrome ore, coke and flux silica at the weight ratio of 70:13:1, wherein the chrome ore contains 35-42 wt% of Cr2O3, the granularity of the chrome ore is 5-60 mm, the coke contains 82-86 wt% of fixed carbon, the granularity of the coke is 8-30 mm, the flux silica contains more than or equal to 97 wt% of SiO2, and the granularity of the flux silica is 10-30 mm; after mixing, add into a 12500KVA submerged arc furnace by a bin, and continuously smelt at 1550-1750 DEG C, wherein the basicity of slag is 1.1-1.5; producing the low-silicon low-titanium and high-carbon ferrochrome containing less than 0.3% of silicon and less than 0.03% of titanium by a pouring mode after separating slag.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a production method for producing low-silicon, low-titanium and high-carbon ferrochromium by continuous smelting in a submerged arc furnace, and in particular to a continuous smelting and production of low-silicon, low-titanium, high-carbon ferrochrome using chrome ore as a raw material method. Background technique [0002] In steel metallurgy and foundry industries, high-carbon ferrochrome is widely used as an important raw material and additive. With the development of the market economy, steel companies have more and more stringent requirements for the composition of high-carbon ferrochrome; in the production of special bearing steel materials There are special requirements for the content of titanium and silicon in high-carbon ferrochrome alloys. The demand for high-carbon ferrochrome products with a silicon content of less than 0.3% and a titanium content of less than 0.03% is i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B4/06C22B5/10C22C27/06C22C1/02
Inventor 张晶涛段少扩关铁强王继鹏张彦勋
Owner 吉铁铁合金有限责任公司
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