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A new technological approach to the granulation of slag
Schematic diagram of a new technological system for hydro-vacuum granulation (HVG) of slag melts. 1—HVG unit; 2—diffusor with a replaceable nozzle As a result of extensive R&D in this area, the slag-processing technologies are slowly converging around dry granulation combined with heat recovery. In this paper, Granulation and Heat Recovery from Metallurgical Slags
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Blast furnace slag obtained from dry granulation method as a component
In the experiments, two types of blast furnace slag samples, namely, water quenching slag and dry granulation slag, from the same steel plants were used. Fig. 1 (a) Nowadays, around seven industrial BOF slag granulation processes are operating in China with a common goal to stabilise the slag. The hot stage steel slag Current Development of Slag Valorisation in China
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A Review of Granulation Process for Blast Furnace Slag
Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, water-quenching process plays a In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling.(PDF) Slag granulation systems for blast furnaces
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Current Development of Slag Valorisation in China
The main hot stage slag valorisation processes were introduced to deal with slag granulation, metal recovery, and slag products quality. In addition to the slag Drum-granulation process is a new process for molten steel slag granulation. It is an improved version of the HK process, which was originally used for BF slag granulation [].A kind of heat resistant alloy steel was used as material of the drum, and the cooling ability for the drum was enhanced in order to fit the high temperature of Current Development of Slag Valorisation in China
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高温熔渣热资源回收技术发展及探讨
对干法粒化、化学法、冷却水余热利用、直接制备产品4种熔渣热能利用技术进行了论述探讨。. 熔渣热能回收技术的应用离不开熔渣资源利用，综合经济效益最大化是热能利用技术应用的关键因素。. 对于高温熔渣热回收技术建议如下：针对活性物料含量低的熔目前，大多数高炉渣的利用途径仍滞留在低技术含量及产品附加值低等阶段，少部分含钛炉渣用于制造光感材料。. 如何提高高炉渣的利用水平，为钢铁企业增加一条“降本增效”的路子呢？. 我们从高炉渣的 降本增效-高炉炉渣的处理方法和综合利用技术汇总
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Process Concept for the Dry Recovery of Thermal Energy of
In: Slag valorisation symposium, Mechelen, Belgium. Xie D, Jahanshahi S (2008) Waste heat recovery from molten slags. In: International congress on the science and technology of steelmaking, Gifu, Japan. Fenzl T (2020) A significant change in slag treatment—an update on industrial dry slag granulation. In: Global slag conference, 10 Introduction. Granulation of molten metallurgical slags is a value-adding process that converts a low-value byproduct (and sometimes waste) into a saleable product with multiple uses by the building and construction industries. In particular, when ironmaking slag is granulated and is substituted for Portland Cement, the environmental andPreface for Thematic Section: Slag Granulation SpringerLink
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Environmental and Socioeconomic Impact of Copper Slag
Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt, silica, and alumina. Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions High content amorphous phase blast furnace slag beads were prepared by gas quenching blast furnace slag (BFS), which could not only avoid a series of environmental problems caused by traditional water quenching methods, but also significantly increase the added value of BFS subsequent products. In this paper, the Granulation Effect Analysis of Gas Quenching Blast Furnace Slag
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Disposal of High-Temperature Slags: A Review of Integration
Coal gasification and pyrolysis. The integration of coal gasification and heat recovery from hot slags was first proposed by Liu in 2004,[10,11] which was composed of a slag granulation part using a RCA and a coal gasification part using a two-level fluidized bed.Since then, a series of experimental and theoretical analysis have been performed to This proven granulation process ensures economic granulation and produces valuable and consistent properties in the blast furnace slag. Danieli Corus condensing tower technology has a proven track record in both the steel and the aluminium industry. Dewatering is required to lower the moisture content to around 15%.Products › Ironmaking and steelmaking › Slag Granulation
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Slag Granulation Paul Wurth
Slag Granulation. Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a value added product for the cement industry, using granulated slag sand as CO2-friendly substitute of clinker in cement production. Paul Wurth has developed the INBA® slag granulation process, incorporating our proprietarynovel dry slag granulation process’, Progress in Computational Fluid Dynamics, Vol. 10, Nos. 5/6, pp.292–299. Biographical notes: Yuhua Pan received his PhD in Process Metallurgy from LuleåYuhua Pan* Peter J. Witt Dongsheng Xie ResearchGate
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RecoDust—An Efficient Way of Processing Steel
The Dry Slag Granulation (DSG) is probably an easier way to provide a suitable grain size. The produced particles have shown a grain size from 0.5 to 4 mm. The main benefits of the dry slag granulation of dry granulation of molten slags with the use of centrifugal units, by analogy with the technology of powder formation from iron melts [19–21]. The system of dry, drum-ball granulation of slag with the possibility of heat recovery is also being piloted [22]. How-ever, based on a critical analysis of the published research, it can be notedA new technological approach to the granulation of slag
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A new technological approach to the granulation of slag
The technological factors required to improve the operational properties of granulated metallurgical slags demanded in the building industry have been analyzed. In order to satisfy these factors, a new technology for hydro-vacuum granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant BOF Steel Slag: Critical Assessment and Integrated Approach for
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Application of iron and steel slags in mitigating greenhouse
In addition, the rapid cooling process of slag granulation can vitrify the slag well, and the formation of the glass phase closely matches the properties required in Portland slag cement manufacturing process (Tripathy et al., 2020). Therefore, molten-slag granulation technology also has a positive significance for energy saving and emissionwater granulation technology to produce steel shots for surface preparation (steel-shot blasting). Around this time, and in relation to steel shot manufacturing, it started to explore methods of metal recovery from steel slags leading in 1993 to its rst patent on the subject [1]. This rst process was based on water granulation of steel-laden slag,Slag Resource Recovery Via Air Granulation Springer
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钢铁冶炼渣的处理利用难点分析
摘要 为促进熔炼渣的显热回收、降低钢铁冶炼能耗,提高熔炼渣的利用率和经济性,通过分析钢铁厂熔渣的处理和利用难点,提出了熔渣调质及泡沫化处理的干法粒化方法,通过引入金属铁提高熔渣的导热系数、熔渣泡沫化改善粒化效果,为解决干法粒化及熔渣利用Blast furnace slag (BFS) and steel slag (SS), collectively called iron and steel slags, are the main by-products of steelmaking. The economical and efficient use of iron and steel slags to reduce greenhouse gas (GHG) emissions is an urgent problem to be solved. Centrifugal granulation is the most effective method. Compared with air, Application of iron and steel slags in mitigating greenhouse
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Modeling of the molten blast furnace slag particle deposition on
The blast furnace slag with extremely high discharge temperature is a by-product in iron and steel production process. Dry granulation method based on rotary disk atomizer shows great advantages in recovering sensible heat of blast furnace slag. However, during flight process, molten particles may impact on the wall which would
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