Blast furnace flue dust is generally contained of fine solid particles recovered from wet cleaning of the gases emerging from blast furnace operations. Due to its inherent moisture content, it becomes sticky and agglomerated after long exposure to the atmosphere. Chemical analysis of blast furnace flue dust sample indicates that it contains high
This paper analyzes the char-acterization, beneficiation and utilization aspects of blast furnace flue dust, blast furnace sludge, LD sludge and LD slag generated at modern steel plants. View Show
The beneficiation of an electric arc furnace (EAF) dust waste stream comprising zinc compounds by collecting and combining dust from two or more EAF batches with coal fines to form briquettes, adding the briquettes to a final EAF batch with the charge, and collecting the dust from the final EAF batch, so that the zinc in the beneficiated dust is of a greater proportion than in a typical batch of EAF dust.
Characterization of some blast furnace waste dusts 231 iron oxides, had its maximum of 98% for the solid dusts evacuated into the sludge bin. The optical micrographs in Fig.1 and Fig.2 show the structural type and optical appearance of the waste dusts. The mineral mater determined by point
Recycling of blast furnace dust increases the zinc content of the sinter feed mixture. The degree of volatilisation of zinc in the sintering process and its discharge with the off-gas is of interest because zinc has to be limited in the burden of the blast furnace.
Beneficiation can begin within the mine itself. Most mines will have a crusher within the mine itself where separation of ore and gangue minerals occurs and as a side effect becomes easier to transport.
Blast furnaces produce pig iron from iron ore by the reducing action of carbon (supplied as coke) at a high temperature in the presence of a fluxing agent such as limestone.Ironmaking blast furnaces consist of several zones: a crucible-shaped hearth at the bottom of the furnace; an intermediate zone called a bosh between the hearth and the stack; a vertical shaft (the stack) that extends from
Beneficiation. SGA has profound knowledge and experience and well equipped facilities for the investigation of concentrating characteristics and flow sheet development as well as process optimization for a wide variety of ores. In addition to iron ores, studies are performed on various raw materials such as: chrome, manganese, zinc, lead, copper,
Nov 01, 1978· Two methods for the determination of zinc in blast-furnace flue dusts are described. One involves a solvent extraction step using methyl isobutyl ketone to separate the zinc from the bulk of the interfering elements, followed by a complexometric titration of the zinc with EDTA, using Eriochrome Black T as indicator.
Blast furnace flue dust contains valuable amounts of carbon and iron. The contents of harmful trap elements are low enough for recycling into the blast furnace. Since 1993, SSAB Tunnplåt in Luleå has recycled the flue dust by charging it into the blast furnace in the form of a cold- bonded dust briquette.
Through the analysis and study the properties, characteristics and present conditions of the flue slime of blast furnace dust, a suggestion was made of recovering carbon and iron concentrate from the blast furnace dust using a beneficiation technology consisting of gravity separation-flotation. The laboratory test results indicated that it can obtain the iron/carbon concentrate with a grade of
This paper analyzes the char-acterization, beneficiation and utilization aspects of blast furnace flue dust, blast furnace sludge, LD sludge and LD slag generated at modern steel plants. View Show
In order to make a complete understanding of steel plant metallurgical dusts and to realize the goal of zero-waste, a study of their properties was undertaken. For these purposes, samples of two sintering dusts (SD), two blast furnace dusts (BFD), and one electric arc furnace dust (EAFD) taken from the regular production process were subjected to a series of tests.
For these purposes, samples of two sintering dusts (SD), two blast furnace dusts (BFD), and one electric arc furnace dust (EAFD) taken from the regular production process were subjected to a series of tests. The tests were carried out by using granulometry analysis, chemical analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM
consist of 250-300 kg slag from blast furnace and about 100-150 kg from steelmaking slag and rests of them are dusts, sludge, mill scale, refractory materials etc. [11, 12]. The trend in recent times is using the slag in steelworks with maximum proportions. When compared to blast furnaces slag, BOF slag usage has improved significantly [13]. BOF
1. Talanta. 1978 November December;25(11-12):673-5. Determination of zinc in blast furnace flue dusts. Hitchen A(1), Zechanowitsch G. Author information: (1)Special Analysis Section, Chemical Laboratory, Mineral Sciences Laboratories, CANMET, Ottawa, Canada. Two methods for the determination of zinc in blast-furnace flue dusts are described.
Blast furnace slag is the main by-product of ironmaking, and its waste heat recovery is essential for energy saving. As an excellent gas-solid reactor, moving bed has wide application prospects in
Egyptian iron and steel company generates a lot of the blast furnace flue dust, (20,000-30,000t/y). Most of it is directed to the cement industry and the rest is recycled in the sintering unit. A typical analysis of the blast furnace dust shows that it contains 33.30% carbon and 27.20% Fe.
blast furnace process. The iron ore concentrate is now mixed and ready for the pelletizing process. Pelletizing A pellet plant contains a series of balling drums where the iron ore concentrate is formed into soft pellets, in much the same manner that one rolls a snowball, to make a pellet about the size of a marble (between 1/4" and 1/2").
Mar 29, 2017· Slag waste in Blast Furnace can be decreased by introducing high top pressure and oxygen enrichment. Ore beneficiation plant can reduce the impurities in raw materials. Installation of in-house slag granulation facilities is required to solve the problem of spillage in road during transportation and slag solidification.
10–20 %) from the blast furnace dust, a reduction of the mass of Zn in the remaining coarse fraction for recycling in the range of 40–60 % is possible and only 5–10 % of the carbon is lost. Keywords Recycling Dust treatment Zinc separation Blast furnace residues Introduction The blast furnace (BF) process is the most important pro-
Blast Furnace Process and Operation Blast furnaces are used to smelt iron ores to produce a variety of grades of iron for use in castings, or, as a charge material in steelmaking oper-ations. All ferrous products except sponge iron pass, in point of fact, through the intermediate form of pig iron. A schematic of a 28-foot diameter hearth blast
Mar 09, 2013· Sintering is a thermal process (carried out at 1300 deg C to 1400 deg C) by which a mixture of iron ore, return fines, recycled products of the steel plant industry (such as mill scale, blast furnace dusts, etc.), slag forming elements, fluxes and coke fines are agglomerated in a sinter plant with the purpose of manufacturing a sintered product
Steel mill and foundry waste dusts containing zinc and/or lead oxides in addition to iron oxides are briquetted by means of a hydrocarbonaceous binder, together with sufficient carbon to reduce at least the lead and zinc oxides to the metal; the briquettes are preferably preferentially treated with an oxygencontaining gas at 350* to 600*F to selectively react with the binder to obtain strong