The invention relates to a method for improving the reduction degree of metal components in a chromite concentrate when smelting ferroalloy suitable for manufacturing of stainless steel. The chromite concentrate is fed together with nickel-containing raw material so that by means the amount of nickel-containing raw material it is achieved a desired reduction degree for the metal components of ...
smelting and refining costs, through application of treatment and refining charges1. Penalty charges are applied to account for elements in the concentrate that affect process recoveries or costs. For a copper concentrate this may take the form of: Deductions7 – The amount deducted from concentrate grades to calculate the metal paid for
To produce desirable sinter products required by the blast furnace smelting process, sintering tests of ore mixtures made from a low grade South African chromite concentrate (Cr2O3/FeO = 1.99) and ...
When chromite, the mineral, is extracted from the earth's mantle, it is referred to as chrome ore. Chrome ore is crushed, screened, jigged into chrome concentrate and then smelted into ferrochrome. Ferrochrome, with nickel, is then processed into stainless steel. The processing of chromite is depicted in Figure 1. As chrome ore,
Union Chromite Recovery Plant PGM Concentrated Residues Tailings Purchased Concentrate Concentrate Furnace Matte Smelting Ore Anglo Converting Process (at Rustenburg) Our configuration differs from our competitors - we have a broad footprint across all 3 Bushveld limbs. Consequently, our integrated production system is more complex (i.e.13
The solid state reduction of a chromite concentrate from Northern Greece in the temperature range 1100-1470°C has been studied. ... Ferrochromium produced by smelting chromite ores is an ...
chromite), whereas UG2 concentrates have low sulphide and base-metal contents and higher chromite content. Smelting of UG2 concentrate requires blending with Merensky or Platreef, and, as the proportion of UG2 increases, higher temperatures and power densities are required to keep the chromite in solution in the slag.
SYNOPSIS The prereduction and smelting characteristics of UG-2 ore were studied and compared with those of Winterveld chromite ore. The UG-2 ore proved more reducible, and substantial prereduction (over 70 per cent reduction after 30 minutes at 1250QC) was obtained. No difficulty was experienced in the production oh high-carbon ferrochromium alloy containing 48 to 50 per cent chromium.
MAJOR SMELTING PARAMETERS USED TO PRODUCE ONE TON OF HCFeCr IN SAF USING DIFFERENT SA CHROME LUMP ORES . B. Composition of SA Chrome Lumpy Ores The selected chrome lumpy ores contains mainly Cr 2 O 3, FeO, SiO 2, MgO, Al 2 O 3 and small amount of CaO. The range of chemical composition is 29-43% of Cr 2 O 3, 20-24% of FeO, 4-20% of SiO 2
As part of its effort to devise suitable technology for processing low-grade domestic materials and recycling wastes, the U.S. Bureau of Mines has evaluated the feasibility of smelting a chromite concentrate derived from residues generated by the processing of nickel and cobalt from domestic later-ites. The product sought was a high-carbon ferrochromium suitable for …
chromite content. Smelting of UG2 concentrate requires blending with Merensky or Platreef, and, as the proportion of UG2 increases, higher temperatures and power densities are required to keep the chromite in solution on the slag. Furnaces are operated on a limiting factor of tonnes of chromite held up in the furnace so that chromite solubility
chromite ore.TheUG-2oreprovedmorereducible, andsubstantial prereduction (over70percentreduction after ... concentrate should generate some240ktof42percent Cr2O3chromite tailings withachromium-to-iron ratio of ... Smelting Tests The preliminary work, which was aimed at an evaluation ofthe effects ofslag composition, was con- ...
The invention relates to a method for improving the reduction degree of metal components in a chromite concentrate when smelting ferroalloy suitable for manufacturing of stainless steel. The chromite concentrate is fed together with nickel-containing raw material so that by means the amount of nickel-containing raw material it is achieved a desired reduction degree for the metal components of ...
largest producer of chromite, although it is expected to have witnessed modest production growth of 7.8 percent amid instances of labor strikes at its chromite production facilities and lack of electricity for smelting chromite into ferrochrome.10 The chromite …
Smelting Chromite At Ohanga Lake, near the Canadian northern line in Ontario, the Chromium Mining & Smelting Corporation has chromite averaging 17 percent chromic oxide and is concentrating it to over 40 percent. The concentrate is railed to Sault Ste. Marie, where the company has three electric furnaces making ferrochromium and other products.
The 2013 test work demonstrated that smelting Decar concentrates on a stand-alone basis, with the addition of a reductant and fluxing agents, produces a high-grade product of 35%-50% nickel (the remainder being almost totally iron, plus minor chromite), compared to typical ferronickel products containing 15%-40% nickel.
• Chromite is chemically inert, and has a very high melting point (2040°C), making it very useful for use in refractories • World resources are greater than 12 billion tons of shipping-grade chromite, sufficient to meet conceivable demand for centuries Chromite Smelting –highly simplified FeO.Cr2O3 + 4C fi Fe + 2Cr + 4CO ~1700°C
