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During the smelting of highcarbon or charge ferrochromium, slag and metal are tapped from the furnace into a ladle and separated by decanting or skimming. The recovery of chromium from the ore varies: in a good operation 90 percent is recovered in the molten metal; of the 10 percent remaining in the slag, some is in metallic form and can be ...
Virtually all charge chrome plants now use the crushing/jigging process to recover chrome alloy from both stockpiled and currently produced slag. Studies were carried out at RD, Tata Steel to develop a flow sheet for the recovery of metal from metal–slag mix generated in its charge chrome (ferrochrome with 50–60% chromium) plant, Bamnipal. The studies showed that in the case of the charge ...
Corrosion mechanisms of magnesiachrome refractories in copper slag and concurrent formation of hexavalent chromium Tengteng Xu a, b, Yibiao Xu a, b, *, Yawei Li a, b, Shaobai Sang a, b, Qinghu Wang a, b, Tianbin Zhu a, b, Mithun Nath a, b, Bo Zhang a, b a The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, 430081 Wuhan, PR China
smelting process produces more slag and requires more electric energy to heat and melt the slag. Keywords—ferrochrome production, ferroalloy process optimization, chrome ore. I. INTRODUCTION IGH carbon ferrochrome (HCFeCr)is produced by carbothermic reduction of chrome ore. Electric power is generally used to supply the energy required to carry out the heating, melting and reduction ...
FerroChrome Slag Ferrochrome (FeCr) slag is a waste material obtained from the production of Ferrochrome, an essential component in stainless steel. It has been observed that Ferrochrome slag waste is a suitable material for highway pavement work. This research work was conducted to investigate the performance of Ferrochrome slag waste.
utilised to recover the ferrochrome from the slag produced during the charge chrome process. The slag, which has a metallic content of approximately 4 percent, is processed through a series of crushers and broken down to minus 15mm material. It then moves through a wet jigging plant where the chrome and
by the smelting process during the production of stainless steel in Ferroalloy industries. Review paper is focussed on the use of ferrochrome slag as an aggregate in concrete. The effect of FS on the properties of concrete such as workability, compressive strength etc are studied. The concrete product with ferrochrome slag as coarse and fine aggregate showed excellent results with respect to ...
Charge Chrome： ... Hence in DC open arc furnace subliquidus and superheated slags can be produced in the smelting process. Superheated slag improves to a certain extent the kinetics of chemical reactions and the slagmetal separation whilst subliquidus slag has favourable effect on the furnace lining. Though change to the slag ...
Slag clean technology in 2012. Recovery of contaminated acidic water in 2013. Unitaryfurnace grantedChinese patent in 2013 . Polymetal recovery from dust in 2014. Twostep smelting process in 2015. 02. Arsenic in China. Arsenic in China. 2017, million tonnes of hode copper were produced in China, while 22 billion tonnes of copper concentrate were consumed. As a result, around 50,000 ...
and also gets eliminated in the slag containing manganese. Generally sulphur content of Indian Coals/Cokes is low compared with foreign carbon reductants. However, the sulphur content in High carbon ferro chrome and Charge Chrome has to be kept at % max, since it is difficult to remove it in stainless steel making.
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smelting conditions, chemical chrome control depends on creating a slag in which the maximum amount of chrome is dissolved in the slag. Highly siliceous slags ( acid slags) have high viscosity, poor chrome (III) solubility, and tend to have relatively high liquidus temperatures.
Slag in matte smelting is mixture of oxides in smelting of copper ore concentrate the slag may contain SiO 2, Al 2 O 3, calcium oxide, FeO, Fe 2 O 3, Fe 3 O 4 The desirable properties of slag are low viscosity, solubility, low melting point . Typical reactions in Cu matte smelting: 6CuO+4FeS=3 Cu2S+4FeO+SO2 or if the O 2 pressure is high 6CuO+4FeS=2CuSO4+2FeS .
In the iron and steel smelting process, in order to remove impurities such as phosphorus and sulfur, resulting in a slag with good reactivity and an appropriate amount, metallurgical grade fluorspar fluxes such as limestone, lime, or fluorite are required. In order to control the temperature of the molten steel not to be too high, it is necessary to add a coolant such as scale, iron ore ...
· Normally the slag penetrates into this coke bed, but not as far as to be in contact with the tip of the electrode. The electric heat for smelting is developed in the immediate neighborhood of the electrode tip where the major part of the voltage drop is concentrated. The heated coke bed has a very high electric and thermal conductivity compared ...
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