A new method for the treatment of chromite ore processing residues

被引：63

作者：

Wang, Tiangui ^{[1
]}

He, Menglin ^{[1
]}

Pan, Qian ^{[1
]}

机构：

[1] Henan Univ Technol, Sch Chem & Chem Engn, Zhengzhou 450001, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 149卷 / 02期

关键词：

chromite; residue; chromate; calcination; reduction;

D O I：

10.1016/j.jhazmat.2007.04.009

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Chromite ore processing residue (COPR), derived from the so-called high-lime processing of chromite ore, contains a significant fraction of a leachable Cr(VI) which is harmful to human being and other organisms. In recent years, the concern over environmental pollution from the waste residue containing Cr(VI) has become a major problem for the chromium chemical industry. The main purpose of this investigation is to evaluate a new method for remediation of Cr(VI) in COPR. COPR was mixed with reductants, sucrose, starch or flour, and was calcinated at elevated temperatures in inertial gas. Effects of temperature, dosages of reductants and time on Cr(VI) reduction were investigated. Above 500 degrees C, Cr(VI) can be completely reduced to Cr(III). (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：440 / 444

页数：5

共 29 条

[1] A thermal analysis investigation of partially hydrolyzed starch [J].

Aggarwal, P ;

Dollimore, D .

THERMOCHIMICA ACTA, 1998, 319 (1-2) :17-25

[2] SPECTROPHOTOMETRIC DETERMINATION OF SOME CARBOHYDRATES, THIOCARBONYLS AND HYDRAZINES [J].

AHMED, MA .

ANALYTICAL LETTERS, 1994, 27 (10) :1979-1988

[3] The soda-ash roasting of chromite ore processing residue for the reclamation of chromium [J].

Antony, MP ;

Tathavadkar, VD ;

Calvert, CC ;

Jha, A .

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2001, 32 (06) :987-995

[4] Measurement of hydration capacity of wheat flour: influence of composition and physical characteristics [J].

Berton, B ;

Scher, J ;

Villieras, F ;

Hardy, J .

POWDER TECHNOLOGY, 2002, 128 (2-3) :326-331

[5]

CAO Q, 1992, J ZHENGZHOU GRAIN CO, V3, P69

[6]

*CHIN GOV STAND, 1995, GBT1555571995 CHIN G

[7]

CHOWDHURY AK, 2003, Patent No. 6607474

[8] Commercial extraction technology and process waste disposal in the manufacture of chromium chemicals from ore [J].

Darrie, G .

ENVIRONMENTAL GEOCHEMISTRY AND HEALTH, 2001, 23 (03) :187-193

[9] Leaching behaviour of a chromium smelter waste heap [J].

Deakin, D ;

West, LJ ;

Stewart, DI ;

Yardley, BWD .

WASTE MANAGEMENT, 2001, 21 (03) :265-270

[10]

Ding Y., 2003, Production and Applications of Chromium Compounds

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