Investigation of Efficient Conditions for Oxidative Roasting of Chromite Ore to Produce Potassium Chromate with KOH Additive | Zendy

Sun Zhi | Zendy; Zheng Shili | Zendy; Zhang Yi | Zendy

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Investigation of Efficient Conditions for Oxidative Roasting of Chromite Ore to Produce Potassium Chromate with KOH Additive

Author(s) -

Sun Zhi,

Zheng Shili,

Zhang Yi

Publication year - 2007

Publication title -

steel research international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.603

H-Index - 49

eISSN - 1869-344X

pISSN - 1611-3683

DOI - 10.1002/srin.200706251

Subject(s) - chromite , roasting , potassium chromate , chromate conversion coating , chromium , metallurgy , potassium , chemistry , residue (chemistry) , nuclear chemistry , materials science , biochemistry

A method of producing potassium Chromate directly from chromite ore and KOH was investigated. The chromium recovery was >90% after roasting at 800°C for 3 hours. The KOH‐to‐ore weight ratio was 1.2:1 and the ore‐to‐recycling residue weight ratio was 1:1. Production from the roasting process was easy to leach and about 100% of Chromate could be recovered through a treatment at 30°C for 30~40min with a water/solid ratio of 5:1. The obtained Chromate solution was purified by addition of conventional compounds.

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