1 edition of Evaluation of synthetic fluorspar in BOF slags found in the catalog.
Evaluation of synthetic fluorspar in BOF slags
Bibliography: p. 27-28.
|Statement||by H.W. Kilau ... [et al.].|
|Series||Report of investigations / United States Department of the Interior, Bureau of Mines ;, 8558, Report of investigations (United States. Bureau of Mines) ;, 8558.|
|Contributions||Kilau, H. W.|
|LC Classifications||TN23 .U43 no. 8558, TN747 .U43 no. 8558|
|The Physical Object|
|Pagination||ii, 28 p. :|
|Number of Pages||28|
|LC Control Number||81607971|
project fact sheet recycling and reuse of basic oxygen furnace (bof)/basic oxygen process (bop) steelmaking slags new technologies and methodologies may allow value- added utilization of steelmaking slag thus reducing waste and use of landfills, and saving energy office of industrial technologies energy efficiency and renewable energy • u.s. department of energy. Fluorspar: Mining a Critical Mineral. Fluorspar is the commercial name for the mineral fluorite and was included in the list of 14 raw materials labeled as “critical” by an expert group chaired by the European Commission of the European Union (EU).
Uses of fluorite Naturally occurring fluorite is graded into three categories for commercial use. The first grading is known as metallurgical grade (% calcium fluoride) and this is commonly used in steel production to lower the melting point of the . In the production of synthetic fluorspar low in SiO 2 wherein aqueous hexafluosilicic acid is reacted with calcium carbonate, and the resulting calcium fluoride is filtered off, the improvement which comprises effecting the reaction by adding hexafluosilicic acid to an aqueous suspension of the calcium carbonate at a temperature of about 0° to 40°C, there being present during the reaction at.
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Genre/Form: Government publications: Additional Physical Format: Online version: Evaluation of synthetic fluorspar in BOF slags. [Washington, D.C.]: U.S.
Dept. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. The losses during synthetic fluorspar trials considerably exceeded those from natural fluorspar trials.
Laboratory viscosity testing, using a high-temperature rotational viscometer, confirmed this finding and indicated that fluorspar volatility in slags is related to slag basicity. The scrubber-water fluorine analysis for BOF testing yielded o 38, and 52 ppm fluorine, respectively, for tests of natural, ALRC synthetic, and DFM synthetic fluorspar.
The laboratory viscosity testing of BOF and cupola slags also revealed greater losses of fluorine from the latter, indicating the losses were more a function of slag.
Basic Oxygen Furnace (BOF) slag is a major waste product generated during the steelmaking process. In India and in most industrial countries, the use of BOF slag as a road ballast and land filler has had a very long history.
This being a low end use, a study was conducted to examine the possibility of converting the slag into a hydraulic by: 4. Fluorspar The mineral fluorspar consists of % calcium and % fluorine in its pure form (CaF 2).
In this case, it is colorless and transparent but different colors can be induced by impurities in the crystal structure. Most fluorspar is extracted either in pure veins or in File Size: KB.
Quantity of synthetic slag Q is in percent from the quantity of steel and the high values of correlation coefficient shows tide interdependency between the oxygen and sulphur contents of steel, after treatment and the quantity of synthetic slag.
30 40 50 60 70 80 00,5 3 Quantity of slag, % Oxigen, ppm 12 14 16 18 20 22 24 26 28 30 32 00 File Size: KB. Purpose: The paper focuses on evaluation of slag regime by the help of synthetic slags based on Al 2O 3. The comparion of influence of synthetic slags on the production of two chosen grades of steels focused on evaluation of effectivity of created refining slag during treatment in the secondary metallurgy was the objective of plant Size: 1MB.
The paper focuses on an evaluation of the slag regime and steel desulphurisation in a ladle with the help of synthetic slags based on Al2O3 containing various mass amounts of Cr2O3 varying from 0.
Use of fluorspar in steel refining operations is one of the environmental concerns and as such reduced consumption of this material or substitution of the same is one of the objectives.
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF belongs to the halide crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as Fluorite.
Pure fluorite is transparent, both in visible and ultraviolet Category: Halide mineral. Define fluorspar. fluorspar synonyms, fluorspar pronunciation, fluorspar translation, English dictionary definition of fluorspar.
His latest book is "Fluorspar Mining: Photos from Illinois and Kentucky, " The book contains more than images that display early pick and shovel extraction, as well as primitive drilling methods. "The U.S. Bureau of Mines investigated recovery of manganese from basic oxygen furnace (bof) steelmaking slags because the slags represent a large potential resource of a metal for which there is no domestic production.
Synthetic fluorspar flux in the basic cupola: evaluation of operation and fluorine volatility. Personal Author: Kilau, H. Source: USGS Over the past several years, metspar has accounted for some % of the total mine production.
(Intherefore, this would translate to around million tonnes.)Author: Hard Assets Investor. ri / evaluattion of synthetic fluorspar in bof slags, pb, $ 12 ri / recovery of byproduct heavy minerals from sand and gravel operations in oregon and washington, pb, $ 6 ri / an algorithm for determining bebye temperatures, pb, $ 4.
BFL produces Acid Grade Fluorspar which is a key raw material for the production of hydrofluoric acid, fluorocarbons, fluoropolymers and aluminium fluoride. These chemicals are used in the automotive, electronic, construction and chemical industries as well as in the production of aluminium and steel.
Fluorspar has been included in the list of. the mineral fluorspar. It is also found in small amounts in a wide variety of other minerals, such as apatite and phlogopite.
Fluorspar generally develops well-formed cubic crystals exhibiting a wide range of colours. Fluorspar has a low melting point, and when added to metallurgical slags, it imparts greater fluidity at lower temperatures. Total reported U.S. fluorspar consumption increased by more than 9% in compared with that of Consumption of acid grade for HF and AlF 3 increased by 12% tot, but consumption of fluorspar for metallurgical and other uses decreased by 7% (table 2).
Acid-grade fluorspar was used primarily as a feedstock in the manufacture of HF. The statistical evaluation of 60 campaigns of electric arc furnace plant was performed. According to the graphical relationships and average values of parameters, it was found that chemical compositions of slags did not change practically and high effective dephosphorization can be.
Two different types of steel slag (BOF and EAF ladle slags) generated from Indiana steel plants were considered in this study.
Mittal Steel, Indiana Harbor Works West Plant, which is located in Highland, Indiana, was the source plant for the BOF slag. Multiserv Ltd., Harsco Corporation, which performs slag processing operations at the Mittal. Steelmaking Slag Beneficiation by Magnetic Separator and Impacts on Sinter Quality Ö.
S. Bölükbaşı1, B. Tufan1* 1Department of Mining Engineering, Dokuz Eylül University,Izmir, Turkey Abstract: Basic oxygen furnaces (BOF) slag is the main problem at all iron and steel factories.Metallurgical ContentThe Fluorspar Beneficiation ProblemA Fluorspar Flotation Process FlowsheetCrushing Fluorspar OreGrinding Circuit The Fluorspar Beneficiation Problem Acid grade fluorspar which is in great demand by the chemical and aluminum industries, must contain at least % CaF2 with not more than % SiO2 and % Fe2O3.
Often the Silica is limited to % with .Introduction to Fluorspar and Price Deck for Acidspar Jon Hykawy, Ph.D., MBA [email protected] Alex Watt, MBA [email protected] Page | 2 Industry Background Fluorspar, or fluorite, is a mineral form of the chemical compound CaFFile Size: KB.