Novel coke-free cupola furnace and method of melting iron by use of novel coke-free cupola furnace

Abstract

The invention relates to the technical field of cast iron smelting equipment, in particular to a novel coke-free cupola furnace. The novel coke-free cupola furnace comprises a furnace body and a heating source. The whole interior of the furnace body is of a cavity structure which is through from top to bottom. A feeding inlet and at least one iron outlet are formed in the furnace body, and communicate with each other through the cavity structure. A furnace hearth region and a melting zone of the cavity structure are set to be a filling section which is used for holding high-carbon balls, wherein the high-carbon balls are used for supporting a furnace burden. The heating source is a natural gas combustor, combustion nozzles of the natural gas combustor are arranged on the furnace body and located on the high-carbon ball filling section. By the adoption of the novel coke-free cupola furnace, the high-carbon balls serve as supporting material columns instead of a water-cooling furnace grate and a fire-retarding ball bed, and therefore safety risks, possibly caused by the water-cooling furnace grate, of the equipment and the loss of heat brought away by cooling water in steel pipes ofthe water-cooling furnace grate are avoided.

Description

technical field [0001] The invention relates to the technical field of cast iron smelting equipment, more specifically, to a novel coke-free cupola and a method for melting iron using the device. Background technique [0002] Since the 1980s, the United Kingdom and Germany have invented a coke-free cupola that uses natural gas-oxygen burners as the heat source to replace coke with natural gas, which has abundant reserves of clean energy, and has achieved good energy-saving and emission-reduction effects. Compared with the traditional coke cupola, melting the same amount of cast iron, the natural gas coke-free cupola can reduce CO 2 Emission over 70%, reduce SO 2 More than 90% of emissions. At the same time, the structure of coke-free cupola equipment, especially the supporting environmental protection equipment is relatively simple, the investment is small, and it can be transformed on the basis of the original cupola equipment without building a new furnace, so it is easy...

AI Technical Summary

Problems solved by technology

Because the ceramic balls only play the role of supporting and raising the hearth in the furnace, there is no beneficial effect in addition, it can only consume energy, and eventually all become slag; in addition, the price of ceramic balls is several times the price of coke, so The daily consumption of ceramic balls also increases the cost of opening the furnace

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