Microwave double-screw tube furnace and method for preparing ferromanganese alloy by using microwave double-screw tube furnace and submerged arc furnace in combined manner

Abstract

The invention relates to a microwave double-screw tube furnace and a method for preparing ferromanganese alloy by using the microwave double-screw tube furnace and a submerged arc furnace in a combined manner and belongs to the technical fields of microwave equipment and manganese metallurgy. The microwave double-screw tube furnace comprises three parts, namely a rack, a microwave cavity and a double-screw stirring device. The microwave double-screw tube furnace is adopted to pre-roast manganese ore so as to obtain a hot-state material, and then, the hot-state material is placed in the submerged arc furnace for smelting, so as to obtain the ferromanganese alloy. According to the tube furnace, microwave heating is adopted, so that the non-contact direct rapid heating of the material can be realized; due to the arrangement of reactor magnetrons, the efficiency of converting microwave energy into heat energy can be greatly increased; due to the combination and matching of a large number of low-power magnetrons, the successful research and development of a high-power microwave reactor for industrial production are realized; the method is short in production cycle and low in energy consumption, and various harmful phenomena caused due to the fact that cold materials enter the furnace can be properly overcome.

Description

technical field [0001] The invention relates to a microwave double-helix tube furnace and a method for jointly preparing ferromanganese alloy by utilizing the microwave double-helix tube furnace and a submerged arc furnace, belonging to the technical field of microwave equipment and manganese metallurgy. Background technique [0002] Microwave heating is a newly developed and increasingly mature heating technology. It has the advantages of non-contact direct heating, bulk heating, fast heating rate, can promote the penetration between particles, and can control the temperature of the processed materials in time. [0003] The design of high-power multi-cavity microwave heating reactor has always been a bottleneck in the industry. Due to the low efficiency of the high-power microwave reactor composed of low-power magnetrons, the main reason is that the installation position of the chromium magnetrons is unreasonable, which causes the electromagnetic waves emitted by each magne...

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Problems solved by technology

But it has serious defects: the load of the smelting furnace is large, the production cycle is long, the productivity is low, and harmful phenomena such as collapse and splashing are prone to occur during the smelting process

This method has obvious inherent defects. First, the temperature rise is slow, and the sintering treatment time is long, resulting in a long production cycle; x o y It needs to be decomposed at a very high temperature; the third is that the rotary kiln is prone to ring formation during the sintering process; the fourth is that the flue gas temperature of the rotary kiln is high, the energy utilization rate is low, and the energy consumption is high; the fifth is sintering It is difficult to control the lumpiness of ore; Sixth, the rotary kiln equipment is huge, occupies a large area, and requires additional power consumption, etc.

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