Non-destructive evaluation using ultrasonic pulse velocity (V p) testing has extensive applications in the concrete industry.With advances in construction technology, the use of ground granulated blast furnace slag (GGBFS) as a partial replacement to cement in a concrete mix is growing in popularity primarily because it reduces the initial …Web
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In the process of iron and steel smelting, severe oxidation-reduction reaction takes place in the iron- making blast furnace, and its energy consumption accounts for more than …Web
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Blast-furnace slag was treated with nitric acid to extract high-purity insoluble silica. Nano silica was then produced using filtration and surface modified by cation surfactant-Cetyltrimethyl ...Web
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1. Introduction. Blast furnace slag is one type of solid waste generated by the iron-making process, which is discharged at temperatures ranging from 1450 °C to 1650 °C.In China, there was approximately 0.197 billion tons of slag discharged in 2012, the thermal energy of which is equivalent to the energy contained in 11.5 million tons of coal.Web
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At the present molten slag from a blast furnace (B.F.) is granulated by impinging much water without any recovery of its much sensible heat (1 823 K), polluting water and atmosphere.Web
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The iron and steel industry (ISI) is pursuing technology breakthroughs to accelerate the transition towards carbon neutrality. Deep cut of CO 2 emission involves with not only technological revolution of producing iron and steel, but also exploiting energy in byproducts and off-process wastes. Molten blast furnace slag (BFS), one of the largest …Web
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The results show that when the ratio of granulated blast furnace slag, desulfurization ash and iron tailings is 12:8:80, the mixing water consumption is 10%, the molding pressure is 10 MPa, and the 28 d compressive strength is 13.4 MPa. With the help of XRD, FTIR, SEM and TG–DTA tests, the hydration hardening mechanism is studied.Web
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Aiming at the low heat recovery efficiency of granulated BF (blast furnace) slag, the concept of a two-stage system recovery waste heat from granulated BF slag was proposed. The principle of the two-stage system was low temperature biomass pyrolysis at 500 °C–700 °C and high temperature bio-oil reforming at 700 °C–900 °C.Web
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A composite mineral admixture was prepared by steel slag and superfine blast furnace slag. The influence of superfine blast furnace slag content of the composite mixture on the mortar and concrete was investigated. The results show that the composite mineral admixture may decrease the strength of concrete at the early age but improve …Web
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1. Introduction. The steel industry as one of the most energy and carbon intensive industries, has attracted much attention in achieving the goals of carbon peak and carbon neutrality [1, 2].The treatment of liquid blast furnace (BF) slag, a by-product of the iron-making process, is one of the breakthrough points, since it contains a large amount …Web
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Water quenching is a traditional heat recovery technology, which uses cold water to cool down slag so as to achieve the desired glassy by-products. However, this …Web
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The quality of raw materials (iron ore, coal, and coke) has a clear impact on the carbon emissions of the hot metal production in steel making. So far, very little work has been done to measure and quantify this impact. Yet for benchmarking, technology choice and general carbon optimization are important elements. The total slag production of a …Web
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The novel full-chain blast furnace slag utilization system was established to achieve the purpose of high quality waste heat recovery and high value-added utilization. The technical feasibility of the integrated system was judged by theoretical and experimental analysis. Meanwhile, the economic evaluation of the system was conducted to obtain ...Web
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1. Introduction. Blast furnace slag is a by-product produced from the iron-making process (Siddique and Bennacer, 2012).Statistically, approximately 300 kg molten slag is discharged per 1000 kg pig iron produced (Yuksel, 2018).Granulated blast furnace slag (GBFS) has different types according to the different cooling methods for the molten …Web
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Coal-based direct reduction is a typical pyrometallurgical technology for recovering metals from lead slag, which has the characteristics of high recovery efficiency, high energy consumption and ...Web
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The sticking point, which blocked the application and development of recovering thermal energy from high temperature slag particles by air, was addressed. The results showed that the packed …Web
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This slag, if cooled to 150 °C through the proposed system, can generate as much as 106 Nm 3 of CO + H 2 (molar ratio of H 2 :CO = 3:1) exiting the reactor at 1100 °C. This would represent chemical energy recovery of 0.24 GJ/ton crude steel (0.81 GJ/ton slag) or 51% of the slag thermal energy.Web
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Introduction. Blast furnace slag is one type of solid waste generated by the iron-making process, which is discharged at temperatures ranging from 1450 °C to 1650 °C.In China, there was approximately 0.197 billion tons of slag discharged in 2012, the thermal energy of which is equivalent to the energy contained in 11.5 million tons of coal.Web
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burdens, five different existing blast furnaces were con-sidered. Data used are from the year 2012 and come from the European Blast Furnace Committee data exchange and from our internal blast furnaces data collection. Addition-ally, a theoretical operation was added corresponding to the reference blast furnace used in the ULCOS2 project [5, 6]Web
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The main initial data for designing the DSGP are the yield of the liquid cast iron supplied for granulation G, m 3 /s, and the maximum particle diameter of the granulated blast-furnace slag d, mm.The secondary data are the temperature of the blast-furnace slag at the exit from the blast furnace, T s0, ℃; thermophysical parameters of …Web
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Ground granulated blast furnace slag (GGBFS) is a solid waste characterized by a high reactivity with alkali solutions, which is normally used geopolymer precursor. Fiber is often used to reinforce geopolymer. However, systematic investigation on the relationship between mechanical properties and microstructure for PVA fibers …Web
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Molten blast furnace slag (BFS), one of the largest high-temperature byproducts, remains the last untapped waste heat source in ISI. Of ever-increasing interest is the centrifugal-granulation-assisted thermal energy recovery (CGATER) from high …Web
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Molten slag is broken up by supersonic air into droplets through the air quenching dry slag granulation technique. The breakup process of blast furnace slag directly determines the droplet diameter and the waste heat recovery. In order to gain deep insight into the granulation mechanism and visualize the breakup process, three …Web
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During the thermal recovery of heavy oil thermal recovery wells, improving the mechanical properties and integrity of the cement ring is of great significance for the safe and efficient exploitation of heavy oil resources. This paper studies the relative properties of calcium aluminate cement and three kinds of slags under the conditions of 50°C × 1.01 MPa and …Web
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Approximately 21 million tons of steel industry slag are produced each year in the United States, and many productive commercial uses of slag have been developed (e.g., road bed, fill material). However, because slag contains heavy metals at concentrations that are higher than in most soil, questions have been raised regarding the need to evaluate the …Web
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Large amounts of titanium-bearing blast furnace slag have been dumped in China, resulting in serious environmental contamination and a waste of precious titanium resource. At present, a process for recovering titanium from titanium-bearing blast furnace slag has been developed. Unfortunately, current size reduction techniques fail to meet …Web
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The utilization of steel slag in cement includes mainly three modes [ 55 ]: matching the clinker of cement raw material, producing low-clinker steel slag cement, and being an active addition [ 55 ]. The process of making steel slag cement is a simple manufacturing technique with less investment and low cost.Web
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Blast furnace slag is the main by-product in the metallurgical process. The impurities such as silicate and aluminate in the raw material of blast furnace iron smelting form liquid slag at 1400-1600°C. Since the 1980s, blast furnace slag has been used as a secondary resource in many countries. 2.Web
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The main challenge of the steel industry for the next decade is the steel production transformation process, starting in Europe. The CO 2 intensive blast furnace/basic oxygen furnace (BOF) route will be substituted by a combination of Direct Reduced Iron (DRI), based on natural gas, later on "green" hydrogen, with an Electric Arc Furnace (EAF) or a …Web
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The expanded slag ball is a porous lightweight slag formed by cooling the slag with high cooling water. The production methods include spray method, trench method and roller method. It can be used to make lightweight aggregate, inner wall panels, floors, etc. it can also be used in load-bearing structures. Blast furnace slag can also be used …Web
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The coal/CO2 gasification reactions in molten BF (blast furnace) slag were studied kinetically by temperature-programmed thermogravimetry using a thermal analyzer. The effect of heating rates and molten BF slag on coal gasification were studied, and the activation energies, frequency factors, and most possibility mechanism functions were …Web
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The granulated blast furnace slag produced by the pilot plants at CSIRO was over 98% glassy and denser than the water-granulated slag. ... Nara Y, Nakatani G, Anzai T, Sato H (1984) Technology of slag heat recovery at NKK. South East Asia Iron Steel Inst ... Fujii K, Shigematsu T, Nakata T (1981) Dry granulation and solidification of …Web
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To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with …Web
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We were able to determine the concentrations of selected PTE (zinc, copper, nickel, cadmium and lead) in the soil, roots and aerial parts of Lolium perenne L., using …Web
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Per ton of iron produced, between 0.2 and 0.5 t of bfs are obtained. The exact amount depends on the composition of the iron ore and on efficiency and size of the blast furnace. In state-of-the-art blast furnaces, the amount of bfs/ton of iron does not exceed 0.3 t. Theworldwide production of bfsis estimated at *360 milliont/a (Reynolds 2009).Web
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1. Introduction. Molten blast furnace (BF) slag is one of the main by-products in the iron-making process, and has a yield of 300 kg/t-pig iron [1].The heat contained in molten BF slag (1500 °C) reaches up to 1600 MJ/t.Globally, the production of pig iron was nearly 1153 million t in 2015 [2], and about 345.6 million t of BF slag were produced.The …Web
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