Efficient and low-consumption method for machining and crushing ferroalloy

Abstract

The invention provides an efficient and low-consumption method for machining and crushing ferroalloy, wherein steps, such as ferrum taking, water quenching, machining and crushing and the like are sequentially carried out; a metallurgical structure inside a glowing red ferroalloy block with the temperature between 550 DEG C and 1000 DEG C is transformed into a brittle bulky longitudinal columnar crystal from a fine compact crystal form through water quenching; and a large number of cold microcracks are formed on the surface of the brittle bulky longitudinal columnar crystal, so that the method is particularly beneficial to the work of machining and crushing. The method completely changes the traditional manner for the crushing work of the ferroalloy, and the fine powder surface rate of the ferroalloy can be lowered below 5%, so that the method has positive significance for lowering the production cost of the ferroalloy, lightening the labor intensity for workers to carry out crushing work and saving energy and reducing emission, comprehensive utilization and saving mineral resources, and has an excellent economic benefit and has a good prospect for popularization and application.

Description

Technical field: [0001] The invention relates to the crushing and processing technology of ferroalloy blocks, which belongs to the technical field of ferroalloy production and processing, and specifically relates to a high-efficiency and low-consumption ferroalloy processing and crushing method, which solves the current [0002] The two major problems of ferroalloy product processing and crushing are high labor intensity and high alloy face rate. Background technique: [0003] For a long time, most ferroalloy production enterprises have been using the traditional process of "casting → iron removal → mechanical or human crushing processing → finished product packaging and warehousing" for processing and crushing operations in product production, providing customers with ferroalloy block raw materials with specified particle size requirements . Although this traditional process technology is quite mature, for high-quality high-carbon ferromanganese and ferrochrome products wi...

AI Technical Summary

Problems solved by technology

Although this traditional process technology is quite mature, for high-quality high-carbon ferromanganese and ferrochrome products with low impurity silicon content, because of their high hardness, it greatly increases the difficulty of crushing and processing. , for such high-hardness ferroalloy blocks, it is basically impossible to use manpower to directly process and crush them, and when mechanical processing and crushing operations are used, a large amount of alloy fine powder will be produced. According to statistics: a ferroalloy block with a thickness of 200mm is broken to 10mm For finished products with a particle size of ~70mm, the surface ratio is as high as 15% to 25%. These fine powdered ferroalloy noodles must either be remelted, and the processing of each ton of ferroalloy fine powder noodles requires an additional cost of about 1,300 yuan, or they can only be mixed with ore raw materials again. Returning to the furnace for re-circulation smelting production will lead to the burning loss of the main pricing elements in a large amount of mineral raw materials and repeated consumption of electric energy. This is a major reason why the current ferroalloy products have extremely high energy consumption and low economic benefits

In recent years, some studies on low-thickness casting using pits or ingot molds have reduced the difficulty of ferroalloy crushing, which has a certain effect on improving the labor intensity of workers. However, it is needless to say that workers are still very hard in the process of crushing. The efficiency of the crushing operation is extremely low (workers can process up to 2 tons of qualified products in one working day), and the face rate in the processing process is still as high as 10% to 12%.