Effect of sodium chloride on selective removal of iron from chromite by carbochlorination

A systematic study of the effect of NaCl on the removal of iron from chromite by carbochlorination by using Cl₂ + CO or Cl₂ + Petrolkoks was carried out. In the range of temperature from 626 to 720 °C Fe, Mn, Ti, Ni, V and Zn were removed in the form of volatile chlorides. The removal amount of iron increased with increasing concentration of NaCl from 5 to 15 %. At the optimum temperature (670 °C) 66 % of iron are removed in only 1 h, the content of Cr was increased by 4 % and Cr/Fe molar ratio was raised from 1.9 to 6.0 at the same time. More detailed results are reported. The chlorinated chromite residues were leached by hydrochloric acid of different concentration. It was shown that acid concentration has no remarkable effect on the leaching percentage of Fe.

Issue 03/2009

Solvent extraction of cobalt at a glance

1. Introduction Cobalt is one of the metals of high economic and strategic importance, largely because of its wide range of applications and dwindling supplies. Several hydrometallurgical processes...

Issue 07-08/2013

Decontamination of soils, Part 2

Flotation – a reliable technology in solid hazardous waste treatment

2?Implementation of flotation in existing soil washing plants The first application of froth flotation in a physical-chemical soil washing plant (Fig. 10) in Germany was performed by RICHTER,...

Issue 12/2010

Valuable waste

Recovery of chromite values from ferrochrome industry flue dust

1 Introduction Waste is a source of secondary raw materials, but at the same time can negatively impact the natural environment and public health. The flue dust generated from the ferrochrome industry...

Issue 09/2020 Flotation 2019

Basics and application areas

T?he conference was held on 11th to 14th of November, 2019, in Cape Town/South Africa and organised by MEI Minerals Engineering Internationals, Barry Wills. Since first conference in 2000 this was the...

Issue 06/2009 RESEARCH AND DEVELOPMENT

Beneficiation of a siliceous limestone sample

1 Introduction Limestone, a sedimentary rock, mostly compo-sed of calcite with some minerals like quartz, feldspar and mi-ca. The major industries which consume limestone are: cement production,...

AT 11/2010