Large amount of slag is obtained during the production of ferrochromium. This by-product has properties comparable to natural aggregates. However, almost all of the ferrochromium slag is landfilled. The main objective of this study was to investigate the effects of ferrochromium slag aggregate on the mechanical properties and permeability of concrete.
Ferrochromium is a metal used as an alloying material in stainless steel production. It is produced by smelting chromite ores and ferrochromium slag is a by-product of this process [ 5 ]. It has been reported that more than 1 ton of slag is obtained for producing 1 ton of ferrochromium [ 6 ].
chromium processing, preparation of the ore for use in various products. Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857 °C (3,375 °F) and boils at 2,672 °C (4,842 °F). In the pure state it is resistant to ordinary corrosion, resulting in its application as an electroplated protective coating for other metals. It dissolves in nonoxidizing mineral acids but not in ...
diy жижиг эрүү бутлуур нь usa Энэтхэгийн жижиг бутлуур машин үнэ Энэтхэгт 100 tph эрүү чулуу бутлуур үнэ Nexpart by WHI Solutions Nexpart from WHI Solutions has accelerated Internet parts ordering Now the industry standard Nexpart allows service . Чатлах бол товшино уу . Гинжит гидравлик ...
Read "10.1016/j.jclepro.2013.06.055" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
slag chromium ferrochromium iron Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US342017A Inventor Marvin J Udy Current Assignee (The listed assignees may be inaccurate. Google has not ...
Ferrochromium, also known as Ferrochrome, is an alloy of iron and chromium containing 50 to 70% of chromium. It is produced by electric arc melting of chromium ore and chromite. Ferrochromium is consumed extensively in the manufacturing of steel to achieve the qualities such as corrosion resistance, tensile strength, heat resistance and yield ...
in order to effect reduction to the metallic state of the chromium of chromium oxide contained in the slag and to permit the metallic chromium thus formed to pass downwardly through the slag to...
The ferrochromium slag is an important by-product of ferrochromium industries. Recycling and efficient utilization of the large volumes of slag generated by ferrochrome production process is a huge challenge for ferrochrome producers.
Харин дунд зэргийн хүчин чадалтай уулын баяжуулах үйлдвэрүүдэд том шатны бутлалтанд хацарт бутлуур хэрэглэж байна. Бага бүтээмж шаардагдах үед булт бутлуур хэрэглэдэг. 12. Хацарт бутлуур PE-марк 13. Хацарт бутлуур Хацарт бутлуур нь 320 мпа-аас хэтрэхгүй даралттай төрөл бүрийн түүхий эдийг том болон дунд хэмжээгээр бутлах ажлыг гүйцэтгэнэ.
PRODUCTION, CHARACTERISTICS AND USE OF FERROCHROMIUM SLAGS Authors: Pekka Niemelä Abstract World HCFeCr production is 6.0 million tonnes. Correspondingly 1.1-1.6 t slag / t FeCr is produced...
1) The point of delivery is defined as that point where the responsibility for the consignment passes from supplier to purchaser. If neither the supplier nor the purchaser is responsible for the transportation, then the point at which the values become valid shall be agreed upon. 2) Sieve analysis of ferroalloys will form the subject of ISO ...
11.3.3.3 Ferrochromium slag It was reported that ferrochromium slag had been used as an aggregate in concrete pavement. With a proper selection of slag as an artificial aggregate, concrete pavements with higher compressive strengths, wear resistance, and specific weight than those of normal concrete were made.
Five different samples including different percentages of epoxy resin and ferrochromium slag were produced. X-ray, gamma ray, and neutron particle transmission experiments were performed for epoxy-ferrochromium slag composites. Also, FLUKA Monte Carlo simulations were made to obtain absorbed doses. As a result, radiation shielding performance increases with increasing ferrochromium slag ...
Ferrochromium slag is a waste material obtained from the manufacture of ferrochromium (FeCr). FeCr metal is produced in electric-arc furnaces by a physical-chemical process from the oxide of chromium ore with coke as the reducing agent at a temperature of about 1,500°C. Both the molten FeCr metal and the slag flow out into ladles.
The Effect Of Ferrocromium Slag On The Strength Of Adobe. × Close Log In. Log in with Facebook Log in with Google. or. Email. Password. Remember me on this computer. or reset password. Enter the email address you signed up with and we'll email you a reset link. Need an account? Click here to sign up. Log In Sign Up. Log In; Sign Up; more; Job Board ...
Ferrochrome (FeCr) slag is a waste product from the carbothermic reduction of FeCr ore resulting in the production of high or low carbon FeCr alloy. It is estimated that the global annual production of FeCr alloy is between 12 and 16 Mt [ 1 ]. It also is estimated that the FeCr slag to alloy production is 1.1-1.5:1 [ 2 ].
A process for the production of ferrochromium from iron-containing chromium ores, in which the reduction of the ore, which is mixed with coal and slag-forming constituents, is conducted in a rotary kiln at 1480° to 1580° C. in the presence of a CO-containing atmosphere from 20 to 240 minutes, and in which melting follows in a melting furnace at 1600° to 1700° C.
Jun 3, 2022Ferrochromium slag is a by-product of ferrochromium production via the smelting of chromite ores. The mechanical properties of this slag make it a potential material to be used as an inexpensive construction material, the utilization of which can reduce the use of natural resources.
By early 2007 the gross installed annual ChCr capacity (including feedstock to refined products and reclaimed alloy from slag dumps) would be in the order of 4,2 million tonnes. Major ferrochromium expansion projects in South Africa are in the pipeline. Xstrata Alloys/Merafe is well advanced with the construction of a major green field ...
Ferrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr2O3 (3.88 wt.%) and MnO (18.69 wt.%), respectively. In this study, batches of ceramics were prepared… Expand Highly Influenced PDF View 1 excerpt, cites background Save Alert Geopolymerization behavior of ferrochrome slag and fly ash blends S. Nath
in ferrochromium slags C.S. Kucukkaragoz and R.H. Eric University of the Witwatersrand, Johannesburg, South Africa Abstract - The dissolution and reduction of a natural chromite ore in molten ferrochromium slag was studied. The chemical composition (by mass) of the chromite ore was: 46.6% Cr2O3, 8.3% Fe2O3, 18.0% FeO, 10.3% MgO, and 14.1% ...
Ferrochromium slag is a waste material obtained from the manufacture of ferrochromium (FeCr). This article reports the results of experiments, aiming to identify the properties of ferrochromium ...
Slag volume produced during the process is highly dependent on the quality of the charge materials used for the production process. The consumption of electrical energy is influenced by the slag volume. The higher is the volume of the slag higher is the requirement of the electric energy. The furnace feed typically consists of chromite ore (lumpy ore, pellets, and briquettes), reductants ...
In a stepwise process, the chrome- and silicon-rich alloy is first reacted with an intermediate slag (14 percent Cr2O3) to produce a final waste slag (<1 percent Cr2O3) and an intermediate alloy 25 percent Si). The intermediate slag (14 percent Cr2O3) in the first step is produced along with a final alloy (70.7 percent Cr; <0.05 percent C) by reacting the intermediate alloy (25 percent Si) of ...
May 14, 2021PDF | In this study, a slag sample resulted from a ferrochrome production process was analyzed for its hexavalent chromium content. Within this scope,... | Find, read and cite all the research you ...
Ferrochrome, or ferrochromium (FeCr) is a type of ferroalloy, that is, an alloy of chromium and iron, generally containing 50 to 70% chromium by weight.. Ferrochrome is produced by electric arc carbothermic reduction of chromite.Most of the global output is produced in South Africa, Kazakhstan and India, which have large domestic chromite resources.. Increasing amounts are coming from Russia and
The slag is waste material obtained in the manufacture of high-carbon ferrochromium. High-carbon FeCr metal with 65% Cr (minimum) content is produced in electric arc furnaces by a carbothermal process from the oxide of chromium ore with coke as the reducing agent at the temperature of about 1700 °C.
Chromium (atomic symbol: Cr, atomic number: 24) is a Block D, Group 6, Period 4 element with an atomic weight of 51.9961. The number of electrons in each of Chromium's shells is 2, 8, 13, 1 and its electron configuration is [Ar] 3d 5 4s 1. Louis Nicolas Vauquelin first discovered chromium in 1797 and first isolated it the following year.
