Magnesium, magnesium alloy and wastes thereof based production line for producing particle magnesium desulfurizing agent/particle magnesium alloy desulfurizing agent

Abstract

The invention relates to a magnesium, magnesium alloy and wastes thereof based production line for producing a particle magnesium desulfurizing agent / particle magnesium alloy desulfurizing agent, adopting the technical scheme which comprises a raw material preheating and refining system, a granulating and injecting system, a vacuum siphon system, a sieving and finished product processing system and an automatic control and operation system. The production line overcomes the defects of high energy consumption, serious environmental pollution, dangers caused by easy incontrollable operation of a material carrying tank, poor safety and product consistency and low repeatability due to the adoption of a crucible electric furnace as well as the defects of serious waste of a magnesium resource, high maintenance cost of equipment, overhigh reject ratio and the like by mechanically cutting and clamping magnesium ingots / magnesium alloy in the traditional particle magnesium / particle magnesium alloy production equipment using a fusion method, thereby solving the comprehensive problems of improved using cost and the like. The production line is suitable for producing molten iron preprocessing desulfurizing agent, molten steel deep-desulfurizing agent and cast iron mixed modifier in steel smelting as well as magnesium / magnesium alloy desulfurizing agent for producing Fe-Si-Mg and Fe-Si-Ca intermediate alloy in silicon iron fusion.

Description

technical field [0001] The invention relates to a production line for producing granular magnesium desulfurizer / granular magnesium alloy desulfurizer based on magnesium, magnesium alloy and waste materials thereof. Background technique [0002] Granular magnesium is generally used as a desulfurizer in the smelting process of existing iron and steel smelting enterprises, because in the hot metal pretreatment desulfurization process, although the price of Mg in the granular magnesium desulfurizer is expensive, because of the small amount of use, the temperature drop of molten iron is less , less slag, less iron loss, high desulfurization rate, low overall cost, and short processing cycle, which is very beneficial to high-paced converters, so the granular magnesium Mg desulfurizer has been adopted by various iron and steel smelting groups It is one of the technical measures widely used to improve the quality of steel production and expand the variety of steel production. In ad...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: ① Due to the limitations of the equipment, the clamping part of the magnesium ingot cannot be completely cut during cutting, that is, about 1 / 7 of each magnesium ingot cannot be cut, resulting in waste of resources; ② The particle size range of granular magnesium after granulation is difficult to control, and the proportion of substandard products is too high; ③The operating speed of all equipment is above 2000r / min, resulting in high equipment failure rate and high maintenance cost

The specific production process is: Generally, the magnesium ingot or magnesium alloy is melted by electric furnace equipment, and then the magnesium liquid or magnesium alloy liquid and salt liquid are mixed and sent to the centrifugal granulation cup for granulation, and then packed and shipped out after screening. The disadvantages of this kind of granulation method are: ①The raw material used for melting is pure magnesium or pure magnesium alloy, and the purity of magnesium must exceed 99.95%. This pure magnesium raw material is expensive in the market and the production cost is high; ②Use pure magnesium or pure magnesium alloy As raw materials, its additives contain fluoride, which is harmful to human health and seriously pollutes the environment; ③ Granular magnesium or granular magnesium alloy produced by atomization has a high number of irregular particles, poor fluidity during the desulfurization process, and is prone to blockage guns, splashes, etc., and the desulfurization rate is low. In addition, the barium chloride in its salt additives is a toxic substance, which is also harmful to human health and serious environmental pollution; ④ use crucible electric furnace to melt magnesium ingots or magnesium alloys, Large power consumption, high energy consumption, and high cost; ⑤ The transfer of magnesium liquid or magnesium alloy liquid adopts bottom flow tank and open hoisting transportation, which is dangerous and affects its temperature control; ⑥ Pelletizing cup design Unreasonable, resulting in low roundness of magnesium particles or magnesium alloy particles, serious tailing phenomenon, and many needles; ⑦The emission of smoke and dust in the production process is large, which pollutes the environment; ⑧The production process is manually controlled, and the consistency of the produced products is poor. low repeatability

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