A kind of mixed semi-coke for ferrosilicon production and preparation method thereof

Abstract

The invention relates to the technical field of ferrosilicon production, in particular to a collocation method of semi-coke for ferrosilicon production, which is used according to the mechanical strength value and specific resistance value of different semi-coke, wherein the weighted average value of mechanical strength is 0.500-0.600, and the ratio The weighted average value of resistance is ≧800mΩ·m, with 3 or 4 kinds of semi-coke, the semi-coke particle size range is 5-15mm, and the particle size range is <5%, and the mechanical strength test method adopts a custom test method. The invention has the advantages of strong applicability, easy operation, fast speed and good production effect, is convenient for field application in production, and promotes the refined development of semi-coke and ferroalloy industries.

Description

technical field [0001] The invention relates to the technical field of ferrosilicon production, in particular to a blue-coke collocation method for ferrosilicon production. Background technique [0002] Semi-coke, also known as semi-coke and coke powder, is fired from the high-quality Jurassic clean coal abundant in Shenfu Coalfield. In recent years, my country's semi-coke industry has developed rapidly, with an annual output of 50 million tons. The structure of blue carbon is massive, the particle size is generally above 3mm, and the color is light black. As a new type of carbon material, it has high fixed carbon, high specific resistance, high chemical activity, low ash content, low aluminum and low sulfur. It has gradually replaced metallurgical coke and is widely used in the production of calcium carbide, ferroalloy, ferrosilicon, silicon carbide and other products, and has become an irreplaceable carbon material. [0003] The quality of semi-coke is affected by many fa...

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Problems solved by technology

[0004] However, there are large misunderstandings in the understanding of semi-coke, especially the mechanical strength of semi-coke has not attracted enough attention, resulting in the failure of semi-coke products to make the best use of them, resulting in a large waste

For example, in the production of ferrosilicon, it is usually used to measure the mechanical strength of semi-coke by beating and stepping on it, so as to carry out the matching of semi-coke for ferrosilicon production, it is difficult to quantitatively guide the production, and it is difficult to meet the refined production requirements only by experience and perceptual judgment , often lead to unstable conditions of the submerged arc furnace, increased power consumption, material collapse, decreased product grade rate, poor reaction in the furnace, etc., resulting in great economic losses and energy waste

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