Novel technology for producing medium/low carbon manganese iron by air three-times blowing method

Abstract

The invention provides a novel technology for producing medium / low carbon manganese iron by an air three-times blowing method. The novel technology comprises the following steps: blowing primary air into a high carbon manganese iron flux, which is different from blowing oxygen by which high temperature evaporation manganese is generated and blowing components are damaged, and completely decarburizing through powerful dynamics stirring; blowing secondary air on a high carbon manganese iron flux liquid level so as to burn carbon monoxide generated by primary-air blowing for increasing heat, and adding more manganese ores so as to increase manganese oxide solid oxygen which facilitates decarburization and the recovery of manganese metal; blowing tertiary air and fuel gas into a furnace at the same time so as to provide external heat for increasing the furnace temperature, conditionally adding more manganese ores in an oxidation period and more reducing agent in a reduction period, conditionally adding a refinement period and meanwhile adding the manganese ores and the reducing agent so as to ensure the blowing technological operation and adjust product components for ensuring the quality.

Description

Technical field: [0001] The invention relates to a ferromanganese smelting process, which uses air instead of oxygen to blow high-carbon ferromanganese to produce medium and low-carbon ferromanganese. Background technique [0002] The existing production methods of medium and low carbon ferromanganese mainly include the following three methods, electrosilicothermal method, shaking furnace method and oxygen blowing method. [0003] Both the electric silicothermal method and the shaking furnace method use silicomanganese alloy as raw material, manganese ore as oxidant, and smelting electricity provides heat source to produce medium and low carbon ferromanganese. The basic principle is that the reducing agent silicomanganese alloy and the oxidant manganese ore undergo oxidation-reduction reactions in a liquid state. The silicon element in the silicomanganese alloy and the oxygen in the manganese oxide manganese oxide form silicon dioxide and gold enters the slag, and the metal ...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the shortcomings of the above-mentioned oxygen blowing process, and provides a new process for producing medium and low carbon ferromanganese by the air triple blowing method, which overcomes the shortcomings of large manganese loss and serious damage to components caused by the high temperature of the "fire point" and solves the problem of recycling. gas problem