The objectives of the presented research work were to check the suitability of steel slags for concrete production and then to develop concrete mixtures with high volume of industrial by-products, for low-cost and environmentally friendly
In the past, different slag materials were often used for landscaping and construction purposes or simply dumped. Nowadays German environmental laws strictly control the use of slags, but there is still a remaining part of 35% which is uncontrolled dumped in landfills. Since some slags have high hea …
ISIJ lnternational, Vol. calibrated in the temperature range of 1463-1675K using a reference slag (consisting of Li20-Al203Si02) developed for the BCRprogram of the European Union.8) 2, I. 3 Results Oneslag composition, viz. 30wto/oAl203-50wtoloCaO- 7wto/oMg0-13wto/oSi02, was studied in the present work. The measurementswere carried out in the tem- perature range 1776-1973K. The …
The use of LF slag as 30 % of the total binder and EAF slag as coarse aggregates seems to give a concrete with 28-day … Utilization of Ladle Furnace slag from a steelwork for, European research on the recovery and use of LF refining waste slag has been ongoing for a period of time [8][9][10] Many scholars are concerned by LF slag recycling .
The LF slag produced low zeta potential (≈ −15 mV) and low turbidity values over all pH ranges . On the other hand, the bag house dust (BHD) dispersions exhibited high negative zeta potential (≈ −35 mV) and high turbidity values, especially at higher pH values (the typical drilling fluid condition), displaying high dispersion stability ...
The 4 in. cubes (100 mm cubes set of 3) each were cast The carbonation of LF slag was found to be suitable for for compressive (7, 28, 56, 91 & 119 days), split strength use as a fine aggregate. Significant amounts of carbon (7 & 28 days) and 4 in. (100 mm) beam mould for flex- sequestration could be realized in a potentially useful ure ...
Type of LF slag Λ C S x103 (KTH) μ (Pa.S) A/C Si/Mn killed 0.74 3.02 0.23 0.18 Si/Mn/Al killed 0.77 4.01 0.09 0.41 synthetic slag 0.72 0.81 0.13 1.15 * Λ is optical basicity, S is sulphide capacity of slag, μ is viscosity of slag, A/ is Al 2 O 3 /CaO Effect of slag properties on sulphide capacity
Determining free lime content in steelmaking slag is crucial for its safe reuse in road construction. A simple method has been recently developed to rapidly derive this value via cathodoluminescence (CL) imaging of steelmaking slag, previously quenched from 1,000°C to room temperature, according to the illuminated areas corresponding to free lime (luminescence peak at 600 nm).
Industry News Influence of LF refining slag adjustment on ladle refractories and refining effect [] In order to take with the problem of serious erosion of ladle lining during the desulfrization of LF refining, LF refining slag was adjusted and calcium aluminate system substituted fluorine free refining slag with fluorine.
View Utilization of cementitious industrial waste products (slag, fly ash, silica fume) and natural pozzolans Research Papers on Academia.edu for free.
Aug 04, 2016· As shown in Fig. 1, the LF slag cyclic utilization process in Tangsteel Company China comprises the following main steps: In step 1, after the converter smelting, the ladle waits for LF refining at the entering station.The ladle with residue from casting will be shipped back by a crane. Depending on the amount of molten steel in the ladle, a suitable amount of hot recycling slag will be poured ...
• On-site tests to use LF slag as slag former in BF to partially replace limestone • LF slag was able to replace partial amounts of limestone • The only effect seen was an increase in Al 2 O 3 content in the BF slag. Webinar on Slag (14 June 2021) Recovery of metal IPBM
PT. Slag Berkat Utama. Slag is non metallic co-product, produced in iron (BF) and steelmaking (BOF and EAF) process. Slag has been commonly utilized on broad scale ever since these processes were first taken into use. The utilization in different fields such as cement industry, heat and sound isolation, filtration, agriculture, tile and glass ...
The invention discloses a kind of hot refining slag of LF belonging to steelmaking technical field and return circulation utilization method step by step, the process of each cycle applications of the method comprises: just refine operation → LF refining procedure → VD vacuum outgas operation → cast operation, wherein, the hot refining slag of LF of specified amount is pulled down before ...
The first stage of the scrap-based steel industry production generates EAF slag (EAFS) and a second stage is performed to refine the molten steel. The slag produced in the LF (LFS) is the result from steel refining and, therefore, it is generally a heavy metal carrier such as chrome, lead or zinc (CEDEX – Ministerio de Fomento, 2018). Get Price
Jul 18, 2013· In this paper, the authors have tried to introduce the use of electric arc furnace steel slag as a raw material in the floor tile body. Experimental samples were prepared with different amounts of slag (10–50 wt-%) using the die pressing method. Fabricated …
Recovery and utilization of oxides in steel slag of LF refining furnace The aluminum in the LF refining steel slag is present in the form of a 12CaO • 7Al2O3 mineral phase with high activity. It is easier to react with the acid and alkali, and it is easier to extract the alumina compared with the traditional aluminum-containing minerals.
slag (LF) 5,25 0,150 6,000 0,156 8,000 0,208 Total Total 1,250 Total 1,759 Total 1,987 Based on the presented evaluation, one considers that on short term the generated total slag amount will increase up to approximately 1,75 mil. t and on average term even to 1,9 mil. t.
Jan 01, 2012· Abstract. The current utilization rate of steel slag is only 22% in china, far behind the developed countries. At present, the amount of slag deposited in storage yard adds up to 30Mt, leading to the occupation of farm land and serious pollution to the environment. Improving the slag utilization is an important way to resolve these problems.
The synthetic slag employed was a coarse blend of 40% recycled LF slag, 40% high calcium lime and 20% dolomite lime. The raw LF slag had transported to a plant where the raw LF slag was separated. The non-magnetic fraction of 8-80 mm size, was further screened to 10-40 mm size. Results had shown that the addition of ~200 kg/heat of LF slag does not
The use of ladle furnace slag for the removal ... furnace slag (LF). The LF slag is produced in the final stages of steelmaking, when the steel is desulphurizedin the transport ladle, during what is generally known as the sec-ondary metallurgy process. About 10–13%
The carbonation of LF slag was f ound to ... -Substituting sand by granulated blast furnace slag.-Substituting natural gravels by crystallized slag. The use of the method of substitution permits ...
The characteristics of the LF slag are presented in Table 1. Samples of LF slag were analyzed by Optic Spectometry with plasma inductively coupled ICP-OES, for iron, magnesium, aluminium, silica etc. Table 1 The chemical composition of LF slag M.U. Fe Mg Al Si Na Ca Mn pH % 10.55 4.10 2.27 8.70 0.034 43.50 0.25 11.08
The carbonation of LF slag was found to be suitable for use as a fine aggregate. Significant amounts of carbon sequestration could be realized in a potentially useful form that further utilizes a waste slag material. Carbonated mortars that used LF slag sand …
The carbonation of LF slag was found to be suitable for use as a fine aggregate. Significant amounts of carbon sequestration could be realized in a potentially useful form that further utilizes a waste slag material. Carbon- ated mortars that used LF slag sand offer the largest gains in terms of CO. 2. uptake.
The LF slag is a byproduct from further refining molten steel after coming out of a basic oxygen furnace (BOF) or an electric arc furnace (EAF). The use of the LF slag in further applications requires knowledge of its characteristics.
May 15, 2008· Current major problems and possible future uses of metallurgical slag are discussed based on assessments of present uses. Improving the use of metallurgical slag as resource materials requires the development of new high‐value‐added products.
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