4.3.3.5 Slag Chemistry 32 4.3.3.6 Hot Metal Chemistry 32 4.3.3.7 Burden Permeability 32 4.3.4 Process Flow Diagram 32 4.3.5 Effect on Gas Cleaning 34 ... relating to the recycling of UOF's to the blast furnace. Any free draining of oil in the transportation, handling, and storage of UOF's prior to their charging must be contained. ...
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The recycling of high-titanium-bearing blast furnace slag (TiO 2 > 23 wt.%) is an urgent problem that has attracted global research attention. To achieve high-efficiency, low-consumption, clean, and high value-added recycling utilization, a new process is proposed herein, which entails reacting a CH 4-H 2-N 2 gas mixture with the titanium …
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Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment. In this paper, the process of steel and steel slag production, physical and chemical properties, and potential options of slag recycling were reviewed. Since steel …
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Large amounts of lead slag are produced during the production of primary lead and secondary lead. Considering lead concentrate smelting as an example, a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag (Hou, 2011).At the secondary lead recycling process, for each ton of metallic lead produced, 100–350 …
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The recycling–utilization rate of steel slag in China is less than 30%. Steel slag is rich in CaO and can produce the Ca(OH) 2 after hydration, which are expected to activate the pozzolanic activity of blast furnace slag. This work recycled steel slag as an alkali activator for the activation of blast furnace slag and prepared a steel slag-blast …
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Engineering properties and carbon footprint of ground granulated blast-furnace slag-palm oil fuel ash-based structural geopolymer concrete Azizul Islam, Professor Ir. Dr. U. Johnson Alengaram CIEM, MCSM, CEng MICE (UK), S.M. Alamgir Kabir
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A sustainable method for Ti, Al, and Mg recovery from titanium-bearing blast furnace slag (TBBFS) coupled with CO2 sequestration by leaching residue is proposed. The results show that the original mineral phase of the TBBFS could be destroyed by ammonium sulfate roasting, in which the valuable metals were converted to sulfates. …
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Blast furnace slag is nonreactive in a high alkali environment, such as concrete and soils. Blast furnace slag concrete can be reliably pumped when the slag is supplied to the ready-mix production in a saturated condition. Use of the cementatious properties of ground granulated blast furnace (GGBF) slag was reported as early as 1774. GGBF slag ...
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In this study, blast furnace slag and fluorite tailing are employed to prepare diopside glass-ceramics with the addition of different nucleating agents. Firstly, glass-ceramics without the addition of a nucleation agent were investigated to determine the appropriate blast furnace slag and fluorite tailing percentages.
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The online preparation of fibers using molten modified blast furnace slag can not only achieve the high-value-added utilization of the slag but can also make use of the sensible heat of the slag ...
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Blast Furnace Slag. Ground granulated iron blast-furnace slag (slag cement) is a water-cooled nonmetallic hydraulic cement consisting essentially of silicates and aluminosilicates of calcium grounded to less than 45μm [1]. ... Thus, preparing geopolymers by using BFS for solid waste recycling, lower energy cost, and CO 2 …
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Abstract (1) Background: The growing demand for developing new methods of degraded land remediation is linked to the need to improve the soil …
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1. Introduction. Ti-bearing blast furnace slag (TBFS) is considered industrial waste containing valuable Ti in the Panzhihua region of China. The concentration of TiO 2 in TBFS is typically 22–25% (Chen et al., 2018).At present, the amount of TBFS is 70 million tons, and it is increasing at a rate of 3.6 million tons per year (Zhang et al., 2018; Zhang …
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Blast furnace slag is a by-product from blast furnaces which is used to produce iron. Blast furnace slag has been used extensively as a successful replacement material for Portland cement in concrete materials to improve durability, produce high strength and high performance concrete, and brings environmental and economic …
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Investigations were carried out on the suitability of granulated blast furnace slag as a mold material for either full or partial replacement of existing silica sand in the foundry industry.
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The high-value utilization of water quenched slag (WQS), one of the bulk byproducts originating from the iron manufacturing industry, remains an important subject in the environment. Through a mechano-chemical co-activation strategy, WQS can be used to prepare porous calcium silicate hydrate (C-S-H), which was applied as gelling filler to …
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Blast furnace (BF) slag has been recycled in the construction industry mainly as cement and concrete. However, in the past few years, recycling conditions have changed and other recycled materials ...
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The first stage of steel production is blast furnace steelmaking, in which raw iron ore is converted into pig iron, which contains various amounts of carbon, silicon, manganese, sulfur and phosphorus.
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Ti-extraction blast furnace slag (TEBFS) is an industrial solid waste, which is harmful to the environment and sustainable development of China's titanium industry. The efficient utilization of TEBFS is therefore urgently needed. In this study, calcium silicate boards were successfully prepared as partition materials.
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Use of Blast Furnace Slag Aggregate in Concrete K.G. Hiraskar and Chetan Patil Abstract-The Iron industries produce a huge quantity of blast furnace slag as by–product, which is a non–biodegradable waste material from that only a small percentage of it is used by cement industries to manufacture cement. In the present investigation Blast ...
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Diopside-based glass-ceramics are successfully produced by recycling blast furnace slag and fluorite tailing with the addition of supplementary elements such as TiO2, Fe2O3 and Cr2O3 as nucleation agents, using a conventional melting method. The effects of various nucleating agents on the phase components and structure of the …
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Blast furnace slag was about 50% of the tonnage sold and accounted for 88% of the total value of slag, ... Recycling: Following removal of entrained metal, slag can be returned to the blast and steel furnaces as ferrous and flux feed, but data on these returns are incomplete. Entrained metal, particularly in steel slag, is routinely recovered
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Lead and Zinc Production. H.Y. Sohn, M. Olivas-Martinez, in Treatise on Process Metallurgy: Industrial Processes, 2014 2.3.1.2.4.1 Reverberatory Furnace. The reverberatory furnace produces molten lead and a high-lead slag that must be subsequently reduced in a secondary process such as an electric furnace or a blast …
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Blast furnace feedstock recycling of waste plastic ... Blast furnace slag is a nonmetallic coproduct produced in the process in the production of iron from iron ore or iron scrap. It consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. The molten slag, which absorbs much of the sulfur from the charge, comprises ...
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Scrap and recycling. Globally, the current production of steel is three times higher than the supplies of scrap available. Nearly all steel is recycled (87-90%), but even by 2050 scrap supplies will only make up around half of the projected demand for steel. ... Blast furnace slag and the waste gases from various stages in the steelmaking ...
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Abstract and Figures. While the usage of blast furnace slag is well established in the area of cement making, recycling of steelmaking slag is still a challenging task. About 150-180 kg ...
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Blast Furnace Slag is used in the construction industry as a mineral amendment or aggregate. Their use in Earth Construction, due to their post-industrial origin, may be associated with increased levels of potentially toxic elements (PTE) in the soil. ... The recycling of aggregates from post-industrial waste such as Blast Furnace Slag, …
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Steel plants generate significant amounts of wastes such as sludge, slag, and dust. Blast furnace sludge is a fine-grained waste characterized as hazardous and affecting the environment negatively. Briquetting is one of the possible ways of recycling of this waste while the formed briquettes serve as a feed material to the blast furnace.
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Granulated blast furnace slag having the composition within the following ranges generally meets the requirements for its use in making blast furnace slag cement. It should contain less than 1.0% Fe 2 O 3 and 1%–3% Na 2 O + K 2 O. Some uncertainty was raised in the past concerning the mobilization of sulphur present as sulphide in the slag, its …
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Recycled aggregates, such as ceramic, brick, and marble wastes, in the blast furnace slag concrete have been investigated in the limited number of studies to date. In …
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After furnace smelting, liquid blast furnace slag (BFS) is transported in cisterns to dumps. The cooling process results in the crystallisation of many minerals, mainly silicates
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The recycling technology of demolished concrete wastes in building materials manufacture provides a possibility of achieving sustainable constructions. Carbonation pre-treatment helps to enhance the performance of recycled concrete fines effectively. ... For instance, granulated blast furnace slag (GBS) blended cement concrete performed a great ...
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Recycling and valorization process of a lot of industrial by-product and waste materials have become a problem urgently facing our future for environmental protection trends. ... Ground granulated blast-furnace slag (S or slag), is a waste material generated from the iron blast furnace and subsequently quenched, and its composition is ...
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The use of blast furnace slag as artificial rocks is also possible because they are similar to semi-hard stones. As a recyclable material, they support resource …
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Recycling of blast furnace slag to prepare calcium silicate hydrate by mechanical-chemical co-activation and its application to calcium silicate fireproof board - …
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