Extraction of Chromium from Carbon Ferrochromium Residual Wastes

P P Lazarevskiy,Yu E Romanenko,A V Valueva,R A Gizatulin,D V Valuev,A Serikbol

doi:10.1088/1757-899x/91/1/012038

Abstract

This work reports the problem of processing residual wastes after producing carbon ferrochrome by recycling dust using a hydrometallurgical method with the purpose of extracting the basic component - chromium, The X-ray diffraction analysis results, chemical and granulometric compositions of dust from the carbon ferrochrome production are given, The method for the production of chemical-enrichment concentrate (CEC) by processing ferrous dust is described, with obtaining a middling product - sodium mono-chromate with its further reduction to chromium hydroxide, followed by autoclave leaching, and resulting in the production of chemically enriched chrome concentrate, The plant used for autoclave leaching and filtering is schematically depicted, The smelting process of metallic chromium using the ladle aluminothermic method is described,

Highlights

Today, metallurgical enterprises pay much attention to both the rational use of both internal material returns and industrial waste recycling
One of the technogenic waste types after the production of high-carbon ferrochrome is dust. This ferrous dust is formed in the production process of ferroalloys and is collected by a gas cleaning system fitted in the ore smelting furnace
Given the considerable amount of ferrous dust and high content of chromium oxide in it, recycling is an important task in modern technological scheme of ferrochrome production

Summary

Introduction

Metallurgical enterprises pay much attention to both the rational use of both internal material returns and industrial waste recycling. A top-priority has been given to the disposal of ferroalloy production wastes and their maximum return to production processes that can result, in its turn, in saving material and energy resources and reducing production costs [1, 2]. One of the technogenic waste types after the production of high-carbon ferrochrome is dust (ferrous dust). This ferrous dust is formed in the production process of ferroalloys and is collected by a gas cleaning system fitted in the ore smelting furnace. Given the considerable amount of ferrous dust and high content of chromium oxide in it, recycling is an important task in modern technological scheme of ferrochrome production.

Published under licence by IOP Publishing Ltd

Findings

Conclusion