Quick cooling decarburization method of high-carbon chromium iron

Abstract

The invention relates to a quick cooling decarburization method of high-carbon chromium iron, which is used for overcoming the defect that the carbon content of the high-carbon chromium iron is high. The quick cooling decarburization method comprises the following steps of: quickly cooling for separating out graphite to prepare cast ingot in a smelting-casting process of the high-carbon chromium iron; and carrying out crushing, ball-milling and milling, and separating the separated-out graphite particles by adopting a microwave heating method to prepare chromium iron powder with low carbon content. The quick cooling decarburization method is advanced in process, full and accurate in data; the graphite is firstly separated out by a quick cooling method, and the graphite particles are removed through crushing and a microwave heating method, so that the decarburization effect is good, and the carbon content of the high-carbon chromium iron is not more than 3%, and therefore, the quick cooling decarburization method is a very ideal decarburization method of the high-carbon chromium iron.

Description

technical field [0001] The invention relates to a rapid cooling and decarburization method for high-carbon ferrochrome, which belongs to the technical field of methods for reducing carbon content and applications of high-carbon ferrochrome. Background technique [0002] Chromium-containing alloy steel is the most important metal structural material. The main material for preparing chromium-containing alloy steel is high-carbon ferrochromium. High-carbon ferrochromium contains harmful substances such as carbon and phosphorus, which must be removed or reduced. Chromium-containing alloy steel The requirements for high-carbon ferrochrome are strict, and its carbon content must be less than 7%, otherwise the increase in carbon content will affect the mechanical properties of chromium-containing alloy steel. [0003] At present, high-carbon ferrochrome is produced by submerged arc furnace, and its carbon content mostly reaches 8%, which exceeds the carbon index of high-carbon ferr...

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Problems solved by technology

[0004] There are also various methods to reduce the carbon content of high-carbon ferrochrome, such as vacuum solid-state decarburization, liquid smelting temperature and slag type adjustment decarburization method, converter oxygen blowing decarburization method, in order to achieve the purpose of reducing the carbon content of high-carbon ferrochrome , but these methods also have many disadvantages, such as complex process, long production cycle, high product cost, and serious environmental pollution, which increase the production cost of chromium-containing alloy steel and limit the production quantity of chromium-containing alloy steel

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