Identification and Description of Mineral Processing Sectors …

Ferrochromium is made by smelting chromite ore in an electric arc furnace with flux materials (quartz, dolomite, limestone, and aluminosilicates) and a carbonaceo us reductant (wood …

Chromite ore | PPT

Rock containing chromite ore Mining Method Extraction of the Chromite Ore Both surface and underground mining methods will be used to mine the chromite. Mining produces both ore and waste rock. Waste rock consists of all other non-chromite bearing rock excavated during mining. Surface Mining Chromite ore is mined by surface methods.

Processing of Low-Grade Chromite Ore for Ferroalloy

The low-grade siliceous chromite ore from Ghutrigaon, Odisha, India, containing ~ 16% Cr2O3, with Cr/Fe ratio of 1.97 and ~ 55% of SiO2, does not find any use in metallurgical industry and hence considered as waste. Mineralogical investigation indicates the presence of chromite and quartz as major minerals with minor fuchsite and kaolinite. The beneficiation …

Minerals | Special Issue : Ferrochrome Waste Management

FeCr is mainly produced by the energy-intensive carbothermic smelting of chromite ore in submerged arc furnaces (SAFs), and, to a lesser extent, direct-current (DC) arc furnaces. Several solid and gaseous byproducts (considered by industry as wastes) are generated during FeCr production depending on the production route employed, and are ...

Afrochine takes action on chromite ore waste management to …

Central to this investigation is how Afrochine Chrome Smelting in 2022 responded with an improved waste management plan following a mysterious foot rash outbreak that presented a health risk to the community ... Whaleman and ia farm compound dwellers linked a mysterious foot rash sickness to the chromite ore waste that was disposed to ...

How to Build a Chrome Processing Plant | Mining Pedia

The efficient extraction and processing of chromite ore into usable chrome products require specialized equipment and procedures. +86 ... wastewater, and solid waste on the surrounding environment. 02 Plant ... By-products from the smelting process can sometimes be repurposed for other industries, such as construction. 04 ...

Research on the environmental stability performance of chromite ore

Chromite ore processing residue (COPR) is a hazardous waste because of leachable chromium, especially Cr(vi). Therefore, ascorbic acid (AA) and blast furnace slag (BFS) have been used to detoxify and solidify COPR. On this basis, environmental stability experiments with high temperature and freeze–thaw cycles were carried out to explore the stability …

Assessment of Zero Waste Approach by Enhancing Chromium-to …

In this present study, a techno-economic approach was employed to investigate the enhancement of the chromium-to-iron (Cr/Fe) ratio of chromite ore, utilizing magnetizing roasting via both conventional and microwave heating sources. The primary objective was to selectively remove iron (Fe) from chromite spinel, thereby increasing the magnetic susceptibility of iron …

An Overview of Currently Applied Ferrochrome …

Ferrous waste by-products from the metallurgical industry have a high potential for valorization in the context of the circular economy, and can be converted to value-added products used in environmental remediation. ... 12, 534. …

Valorization From Waste: Combined Reduction of Chromite Ore …

In current research work, authors have tried to smelt the mixture of low-grade chromite ore and sub-grade manganese ore, dumped as waste, with carbon. The process is …

Chromite ore beneficiation: prospects and challenges

Both host rock is serpentinite and talc-carbonate rock. Idiomorphic chromite is the only ore mineral appearing in economic quantities. The average content of the ore is 26% Cr 2 O 3 and the Cr/Fe ratio is 1.55. The Kemi chromium mine is an open-pit mine with a waste rock to ore ratio of 5.5:1.

The Utilization of Alkali-Activated Lead–Zinc Smelting Slag for

Lead–zinc smelting slag (LZSS) is regarded as a hazardous waste containing heavy metals that poses a significant threat to the environment. LZSS is rich in aluminosilicate, which has the ...

Research on the environmental stability performance of chromite ore

1. Introduction. Chromite ore processing residue (COPR) is a kind of hazardous waste because of the existence of highly leachable and carcinogenic hexavalent chromium (Cr(vi)), which is generated during chromium salt production.While chromium salt is an important strategic resource which is widely used in electroplating, tanning, chemical reagents, wood …

Efficient reduction of Cr(VI) and recovery of Fe from chromite ore

Chromite ore processing residue (COPR) is a by-product generated after the leaching of sodium chromate by roasting chromite ore at 1200 °C. However, the residual 1130–8500 mg/kg of highly toxic Cr(VI) in COPR poses a severe threat to the ecosystems ( Du and Chrysochoou, 2018, Xia et al., 2020, Molinari et al., 2021, Guleria et al., 2022 ).

Kinetics of solid-state reduction of chromite overburden

Chromite overburden (COB) is a mine waste generated in chromite ore processing, and it mainly consists of iron, chromium, and nickel (<1wt%). In the present work, the …

(PDF) Recycling of Chrome-Containing Waste from a …

Prolonged development of ore deposits, ore beneficiation and metallurgical smelting of concentrates result in the accumulation of wastes, forming large-scale dumps and sludge ponds...

Samancor Products

Western Chrome Mines has a capacity of 2.0 million tons of run of mine ore. The main products of the mines are metallurgical and chemical concentrates, with some foundry grades. ... The blasted rock consisting of some 70 percent chrome ore and 30 percent waste, is then loaded by load-haul-dump units and transported to conveyor loading points ...

Chromium (Cr) Ore | Minerals, Formation, Deposits

Smelting: Once the chromite ore is concentrated, it is then smelted to produce ferrochrome, which is a key alloying element in the production of stainless steel. Smelting involves the reduction of chromite ore in the presence of a carbonaceous material (such as coal or coke) in a submerged electric arc furnace or a blast furnace. The high ...

Influence of Chromite Ore Selection on the Pelletized Oxidative

The smelting of chromite to produce ferrochrome (FeCr) and subsequently, stainless steel, is an energy-intensive carbothermic process. Various countries apply the Outotec FeCr process, which employs oxidative sintering in air to produce mechanically strong chromite pellets. During this process, iron (Fe) is liberated from the chromite spinel due to the elevated …

Afrochine takes action on chromite ore waste to safeguard …

"In late 2022, I heard others saying that it was the rubble waste that made us sick", said Magwanza. To date, Magwanza continues to manage the mysterious foot rush that is linked to the chromite ore waste. To date, the Mashonaland West Provincial Medical Director's office has not provided scientific findings to explain the foot rash cases.

Smelting Process of Chromite Ore Fines to Produce Crude …

The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study.

Smelting Process of Chromite Ore Fines to Produce Crude Fe

Smelting Process of Chromite Ore Fines to Produce Crude …

alloy by smelting process of waste chromite ore fines using plasma smelting route. The subject of this work is to study the effect of plasma environment, charge chemistry, and plasma exposure time on the recovery of chromium and nickel from chromite ore and absorption of nitrogen from the plasma environment. 2 Experimental 2.1 Materials The ...

Smelting of High-Carbon Ferrochrome from Prereduced Chromite …

Experimental smelting of three batches of prereduced chromite raw materials with different degrees of metallization of chromium was conducted in the 0.2 MVA ore-smelting furnace of the Chemical ...

Feasibility Exploration of the Efficient Recovery of Chromium from …

Chromite constitutes a mere 3.72% of the ore sample, yet it is enriched with a 63.40% chromium content. Consequently, on the basis of determining the granularity and liberation characteristics of chromite and the occurrence state of chromium, we predicted that the recovery rate could reach 39.47%, constituting a feasible value for chromium ...

(PDF) Chromite. Processing and Applications

In the paper are shown the history, processing and applications of chromite. Chromite is an oxide of iron and chromium with the chemical composition FeO.Cr2O3 and belonging to the spinel group.

The Direct Alloying of Steel through Silicothermic Self

Organosilicon materials generate copious amounts of Si-containing solid waste during production, leading to severe environmental pollution and substantial resource squandering. In pursuit of the resource utilization of Si-containing solid waste, this study conducted experimental research on the direct alloying of molten steel through the …

Recycling of Chrome-Containing Waste from a Mining and

Prolonged development of ore deposits, ore beneficiation and metallurgical smelting of concentrates result in the accumulation of wastes, forming large-scale dumps and sludge ponds negatively affecting the environment and human health. The creation and introduction of industrial waste treatment technologies will make it possible to dispose of them …

The extractive metallurgy of South Africa's platinum ores

The concept of Pd recycling is to extract Pd from the waste materials such as spent catalysts, [7] automotive catalytic converters, [8] waste electronics [9] and used nuclear fuel. ...

Smelting Process of Chromite Ore Fines to Produce Crude …

The smelting behavior of waste chromite ore fines containing Cr and Ni to produce crude Fe–Cr–Ni–N alloy was investigated in this study. In the experiments, for each heat, liquid steel melt (metal pool 1 kg) was prepared in a 3--capacity laboratory-scale electric arc furnace for the absorption of reduced metals like chromium, nickel, etc., under hydrogen and nitrogen …