آخرین محصولات
Waste Production and Utilization in the Metal Extraction …
v Contents Preface..... xv
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(PDF) Effect of Recycling Blast Furnace Flue Dust as
The Egyptian Iron and Steel Company generates a great amount of blast furnace flue dust. The recovery of metals and carbon from this flue dust becomes a very important demand due to the increase ...
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Effective Utilization of Blast Furnace Flue Dust of Integrated …
This not only reduces the cost of waste disposal and environmental pollution but also gives substantial amount of iron ore flux material as well as fuel rate benefits to the existing …
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Dezincification from Blast Furnace Sludge/Dust
The contamination of iron ore dust by zinc is one of the common problems faced in BF, SMS. The Zn during smelting operations is evaporated as zinc oxide (ZnO2) and deposits on the fine iron ore ...
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ROMELT PROCESS FOR IRONMAKING
The iron oxide feed to a Romelt process can be any iron containing material, e.g. iron ore fines and concentrates, blast furnace and BOF dusts and sludges, mill scale, iron bearing slags, scarfing wastes and turnings, and iron dusts etc. The wet non-coking coals of 15 % to 20 % volatile matter and around 8 % to 10 % ash can be used for the …
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Characterization of blast furnace flue dust – a multi analytical
The blast furnace flue dust has potential reuse application in iron making process via the sinter making route mainly due to its high carbon content. The specific aim of this study was to use ...
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Uses of Blast Furnace Slag as Complex Fertilizer
The primary chemical composition of blast furnace slag includes CaO, SiO 2, alumina (Al 2 O 3 ), MgO and FeO [14]. These constituents are same in all types of blast furnace slag, but relative ...
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Mining and metallurgical wastes: a review of recycling …
Waste rock, overburden, and beneficiation waste. As indicated in Table I, ... Beukes, van Zyl, and Ras, 2010; Tangstad, 2013; de Buzin, Heck, and Vilela, 2017). For example, about 7-45 kg of blast furnace particulate …
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(PDF) Effective Utilization of Blast Furnace Flue Dust of …
PDF | Investigations were carried out on the effective utilization of blast furnace flue dust samples obtained from the two integrated steel plants at... | Find, read and cite all the research you...
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Sintering and Briquetting Synergy in Blast Furnace Smelting
The article describes the concept of partially replacing the sinter in a blast furnace charge with extrusion briquettes to form the basis for sintering and briquetting synergy. The comparability criteria for sinter and extrusion briquette (brex) properties and production parameters were analyzed along with a substantiation of the fundamental …
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IRON AND STEEL
Iron is produced either by blast furnaces or by one of seve ral direct reduction proce sses; blast furnaces, however, account for over 98 percent of total domestic iron production. 5 The modern blast furnace consists of a refractory-lined steel shaft in which a charge is continuously added to the top through a gas seal. The charge consists
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Pollution Effects of Abnormal Operations in Iron and Steel Making …
Burden material is charged through a device which allows the entry of lump material and restricts the outward flow of blast furnace gas. Blast furnaces are generally over 100 feet tall and may be 30 feet or more in hearth diameter. The blast furnace, Figure 2, is roughly pear-shaped, with the hot metal and slag formed at the hearth.
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A Study on High-Grade Iron ore Beneficiation to Reduce
Iron ore pellets are largely characterized by inherent physical and chemical properties of the ore. Alumina and silica play important roles in determining the productivity of a Blast Furnace. On average, one percent increase in iron content improves productivity by 2% and reduces coke consumption by 1%. Therefore higher iron ore feed content to …
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Characterization of blast furnace flue dust- an …
Utilization of waste can be possible through proper characterization, suitable beneficiation technique. Blast furnace dust or flue dust is fine-grained and soils hand. …
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Recycling of Blast Furnace Sludge to the Blast Furnace
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 ...
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An overview of utilization of slag and sludge from steel industries
Integrated steel plants utilize mostly five materials such as raw materials, air, water, fuel and power to produce steel. During the production of steel, 2–4 t of wastes are being generated per tonne of steel produced.The various solid wastes in the form of slags and sludges that are emerged from steel plants are blast furnace slag, blast furnace …
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COPPER Copper production
slag, refining slag, or flue dusts), and copper-alloy scrap. The construction of the furnace is basically related to that of the iron blast furnace, but there are considerable differences in design, especially in size and shape: the copper blast furnace is lower and smaller, and its cross section is rectangular.
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Utilization of Some of Major Steel Plant Wastes to Produce
The steel industry generates a significant amount of waste in the form of solid, liquid, and gas pollutants. The research aims to develop a suitable process that can convert these wastes into useful resources. The study focusses on utilizing the waste generated by the sinter plant, blast furnace and steel melting shop, which are the three main …
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Toward environmentally friendly direct reduced iron
Approximately 20 kg of dust and sludges are produced per ton of liquid steel produced via the blast furnaces (BF)/basic oxygen furnace (BOF) production route. Many of these dusts are recycled through the sinter plant or blast furnace route without issue, but high zinc content dusts are routinely landfilled.
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A Review on Recycling and Reutilization of Blast Furnace Dust as …
A large amount of dust is formed as one of the primary by-products during the blast furnace ironmaking process. Besides iron and carbon, it contains a variety of valuable metals such as zinc, lead ...
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Characterization of BOF Dust for Pellets Production Used in Blast Furnace
Large amounts of dusts are produced from the blast furnace and basic oxygen furnace. These contain high levels of iron but their zinc contents of up to 1% and 1–6%, respectively, may prevent ...
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Extraction of Rare and High-Valued Metals from Blast Furnace Dust
In recent years, the treatments of blast furnace dust such as returning to blast furnace sintering, using as flocculants and cement raw materials and adsorbents, recycling carbon and iron as well as recovering rare and high-valued metals were studied [8, 13, 14].Many process technologies have been more mature in enterprise application; …
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Dezincification from Blast Furnace Sludge/Dust
A Project Report On Dezincification from Blast Furnace Sludge/Dust Submitted in partial fulfilment of the requirements of the degree of Master of Technology
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An overview for the utilization of wastes from stainless steel
The dusts are the most important by-product of stainless steelmaking operations. Approximately 1–2% (mass fraction) of scrap charged in the smelting furnaces enters into the exhaust gases and then is converted into the dusts (Zunkel, 1996). The stainless dusts also contain a lot of gangues, but the contents were very low contrasted …
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A Review on Recycling and Reutilization of Blast …
A large amount of dust is formed as one of the primary by-products during the blast furnace ironmaking process. Besides iron and carbon, it contains a variety of …
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12.11 Secondary Lead Processing
The average furnace capacity is about 45 megagrams (50 tons) per day. About 47 percent of the charge is recovered as lead product and is periodically tapped into molds or holding pots. Forty-six percent of the charge is removed as slag and is later processed in blast furnaces. The remaining 7 percent of the furnace charge escapes as dust or fume.
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Reducing the carbon intensity of the iron making value chain
"The blast furnace has been refined over centuries and it is an extraordinarily efficient process. But, of course, it uses carbon," "If you want a process that can compete with blast furnaces in terms of efficiency and productivity, you have got to produce the hydrogen in a competitive way." Renewable options for powering beneficiation processes
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Recovery of Iron and Zinc from Blast Furnace Dust Using Iron …
The amount of dust produced from the blast furnace is very large, and this paper proposed a new method for comprehensive utilization of blast furnace dust. Firstly, cold bonded agglomerates directly put into the iron groove were made by blast furnace dust. The cold bonded agglomerates were reduced and melted by the energy of molten iron, and the …
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Iron Ore Agglomeration Technologies | IntechOpen
Until the 1950s of the last century, the oxidized iron ores that were loaded into the blast furnace had granulometries within 10 and 120 mm. However, the depletion of high-grade iron ore sources has made …
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Existing and New Processes for Beneficiation of Indian Iron ores
Blast furnace flue dust, dolochar, biomass briquettes and waste coconut shell have been successfully applied as reductants for different low-grade iron ores to achieve acceptable iron concentrates [21,22,23,24]. However, the results are yet to prove their viability on a pilot scale before the process can be put into actual industrial practice.
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