Method of implementing multigun directional plasma ore smelting furnace

Abstract

The invention relates to a kind of method with which the multigun directional plasma ore heat stove is produced. In the electrode and in the length direction prefabricate at least two electrode holes whose diameter is between 6mm and 30mm. In smelting, 0.1 to 0.35MPa air is pressed in the electrode hole and filled in the stove along the electrode hole. At every electrode end form at least two plasma guns. It increases the temperature field of the reducing reaction and the carbon monoxide saturation of the reaction region. The invention adopts the prefabricating method to form several electrode holes in the electrode. On every electrode produce several plasma guns. A huge plasma source forms when it is electrified. The invention increases sharply the electric arc temperature, extends the electric arc length, enlarges the cubage of the reducing reaction region in the stove and obtains the purpose of saving electricity, increasing production and raising ore recovery rate.

Description

【Technical field】 [0001] The invention relates to a smelting method of a submerged arc furnace, in particular to a method for converting arc energy into directional plasma energy, and automatically controlling the plasma energy injected into the furnace at the optimum value according to the process of the reduction reaction in the furnace to achieve A method for realizing multi-gun directional plasma submerged arc furnaces by greatly expanding the reduction reaction zone, increasing the temperature of the reaction zone, reducing the unit power consumption of the submerged arc furnace, increasing the output and ore recovery rate, and reducing exhaust gas emissions. 【Background technique】 [0002] Submerged arc furnace is a kind of electric arc furnace series. The smelted products include ferrosilicon, silicon-manganese alloy, ferrochrome, calcium carbide, yellow phosphorus, corundum, etc. The core theory of their smelting is: form directional high-temperature ion flow through ...

AI Technical Summary

Problems solved by technology

Plasma technology has been applied in metal cutting, high-temperature spraying and other fields, but in high-power submerged arc furnace smelting, due to some technical difficulties such as high temperature, super strong magnetic field, current up to 100,000 amperes, plasma gun processing difficulties, etc., And the reason why it is difficult to control the plasma arc flow, plasma has not yet been applied in high-power submerged arc furnaces and high-power electric arc furnaces

[0004] Chinese patent 02229217.9 discloses an AC plasma submerged arc furnace, which describes the method of drilling a small hole with a diameter of 4 mm to 8 mm in the center of the self-baking electrode and the center of the graphite electrode, injecting gas into the hole and electrifying to form a plasma , it is technically not operable at all, because during the self-baking process of the self-baking electrode, the upper part is a messy block electrode paste, the middle part is the electrode paste liquid, and the lower part is a high-temperature zone with a temperature of 800 ° C. In such an electrode It is impossible to drill holes; for graphite electrodes, the diameter ranges from 150mm to 800mm, and the standard length of each electrode is about 1.2m to 1.8m, and a diameter of only 4mm to 8mm should be drilled in the center. A small hole of more than 1 meter has no practical significance in engineering

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