Underflow-type flow-controllable electric-heating graphite nozzle device of electromagnetic induction slag smelter

Abstract

The invention relates to an underflow-type flow-controllable electric-heating graphite nozzle device used for short-flow rock wool production. The device is structurally characterized in that a graphite sleeve is fixed on a bottom lining, the upper end of a graphite electric-heating spiral tube is connected to the graphite sleeve in a threaded manner, an electric-heating tube graphite conducting plate is fixed to the graphite electric-heating spiral tube through a graphite fixing nut, and refractory filler is arranged on two sides of the graphite electric-heating spiral tube. The device has the advantages that the process using the device saves more than 60% of energy consumption per ton as compared to the cupola rock wool process; no environmental pollution occurs; the slag smelter is high in power factor, low in energy consumption and high in heating speed; the bottom-leak deslagging nozzle ensures accurate flow, and no melt is wasted; the adaptation range is wider, and the furnace burden ingredients are adjustable; a slag bath with the upper temperature limit of 1700 DEG C is satisfactory to melts of various qualities, with no need for coke; magnetic stirring and mechanical stirring guarantee even melt ingredients; energy consumption is low, heat efficiency is high, and waste slag is little; the smelter is superior in terms of temperature rise, temperature adjustment, temperature retention and conditioning and is high in loading capacity.

Description

technical field [0001] The invention proposes an electrothermal graphite nozzle device with controllable bottom flow flow in an electromagnetic induction slag melting furnace, which belongs to the technical field of slag melting equipment. Background technique [0002] The process energy consumption of blast furnace ironmaking accounts for about 60% of the total energy consumption of the iron and steel industry. Blast furnace slag is a kind of solid waste discharged from blast furnace ironmaking. Its treatment process not only consumes a lot of energy, but also discharges a lot of harmful substances. Therefore, it is necessary to carry out research on the recycling of blast furnace slag, which is an industrial solid waste. The slag discharged during the blast furnace ironmaking process, also known as blast furnace slag, can be divided into steelmaking pig iron slag, foundry pig iron slag, ferromanganese slag, etc. In some areas of China and the Soviet Union, titanium-magne...

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Problems solved by technology

[0015] The high-temperature slag is in the form of a paste when it cools down to about 1300 degrees, and its fluidity is extremely poor

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