chromite ore processing residue

Chemical and mineralogical characterization of chromite ore

Chromite ore processing residue (COPR) is a hazardous waste. Nevertheless, deposition of COPR in uncontrolled surface landfills is still common practice in

Evaluation of the treatment of chromite ore processing residue by

1 Mar 2016 The effectiveness of the treatment of chromite ore processing residue (COPR) with ferrous sulfate and encapsulation into asphalt were explored

Characterization of Chromite Ore Processing Residue Practice

1 Oct 2007 This paper summarizes the characteristics of chromite ore processing residue (COPR) in terms of their chemical compositions, phases, and

Chromate adsorption from chromite ore processing residue eluates

Abstract. Chromite ore processing residue (COPR) is a harmful waste of the chromate (CrO42-) extraction roasting process. Nevertheless, deposition of COPR in

Pyrolysis Treatment of Chromite Ore Processing Residue by

Publication Stages. Accepted Manuscript - Manuscripts that have been selected for publication. They have not been typeset and the text may change before final

[PDF] Conversion of Chromium Ore processing Residue to Chrome

In Hudson County, New Jersey, there are more than two million tons of leftover chromite ore processing residues (COPR). Part of COPR was used as

Mineralogical characterization of chromium ore processing residue

Mineralogical characterization of chromium ore processing residue. Abstract: Trivalent chromium exists in brownmillerite and chromite. Hexavalent chromium

Speciation in Chromite Ore Processing Residue - OSTI.GOV

The speciation and distribution of Cr(VI) in the solid phase was investigated for two types of chromite ore processing residue (COPR) found at two deposition

Pilot scale treatment of chromite ore processing residue - CiteSeerX

to determine their effectiveness to treat chromite ore processing residue (COPR). Sodium sulfide was used as the reducing agent and cement, gypsum and lime

Comparative study of alkali roasting and leaching of chromite ores

13 Aug 2015 then generates a chromite ore processing residue (COPR) containing the process parameters of alkali roasting of chromite ore and establish.

Environmental status of groundwater affected by chromite ore

Abstract: Chromite ore processing residue (COPR) is generated by the roasting of chromite ores for the extraction of chromium. Leaching of carcinogenic

Leaching Mechanism of Cr(VI) from Chromite Ore Processing

The leaching behavior of hexavalent chromium (Cr(VI)) and major metal elements relevant to Cr(VI) leaching from chromite ore processing residue (COPR) to

Chromite Ore from the Transvaal Region of South Africa Toxics

13 Jun 2017 EPA granted a petition to delete both chromite ore mined in the ore component of the chromite ore processing residue (COPR) from the

(PDF) A Review of Chromite Ore Processing Residue (COPR): Past

19 Nov 2014 PDF Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium

Chromite ore processing residue in Hudson County, New Jersey.

Abstract. Chromite ore processing residue occurs at over 130 sites in Hudson County, New Jersey. Many of these sites are in urban residential areas. This waste

Chromate adsorption from chromite ore processing residue eluates

Abstract. Chromite ore processing residue (COPR) is a harmful waste of the chromate (CrO42–) extraction roasting process. Nevertheless, deposition of COPR

Chromium steel from chromite ore processing residue — A valuable

7 May 2011 As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover them.

Conversion of Chromium Ore Processing Residue to Chrome Steel

During that period, chromate (Cr6+) was produced from chromite ore at three COPR (left over Chromium Ore Processing Residue) leaving un-oxidized

Chromium Ore Processing Residue (COPR) - Maryland Department

20 May 2009 waste rich in metals contamination. This byproduct is variously referred to as chromite ore processing residue, chrome ore processing residual

Remediation of chromite ore processing residue using solidification

18 Sep 2014 Disposal of Chromite Ore Processing Residue (COPR) is a major concern from an environmental point of view because it consists mainly of

Transport of hexavalent chromium in the vadose zone by capillary

13 Oct 2015 Unsaturated behavior of chromium ore processing residue. M.S. thesis Chromite Ore Processing Residue in Hudson County, New Jersey.

Hudson County Chromate Update #3

2conducted at Area of Concern (AOC) 2 of this site. Large piles of chromite ore processing residue (COPR) and COPR contaminated material generated during

Speciation and spatial distribution of Cr in chromite ore processing

13 Mar 2017 Speciation and spatial distribution of Cr in chromite ore processing residue site, Yunnan, China. Guangzhu Zhou1. • Xin Yin1. • Jing Zhou1.

Advances towards a Clean Hydrometallurgical Process for Chromite

28 Jan 2016 In this process, the amount of chromic residue can be reduced to For the chromite ore in nature, a part of the Fe(II) can be replaced by Mg(II)

Review of Chromite Ore Processing Residue (COPR): Past

Abstract: Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]).

Remediation of hexavalent chromium contamination in chromite ore

1 May 2017 Remediation of hexavalent chromium contamination in chromite ore processing residue by sodium dithionite and sodium phosphate addition

Distribution characteristics of minerals and elements in chromite ore

10 Jan 2012 chromium chromite ore processing residue scanning electron microscopy mineralogy element distribution. Supported by National Natural

Treatability of chromite ore processing waste by leaching

The data obtained from the experimental studies were analysed to assess the treatability of chromite ore processing waste (COPW) by leaching and to identify

Review of Chromite Ore Processing Residue - Ingenta Connect

8 Oct 2014 Abstract: Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent

Chromium contamination associated with Chromite Ore Processing

Summary. Chromite ore processing residue (COPR) is a hazardous waste derived from the chromate. (CrO4. 2–) extraction roasting process. It is a major source

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