heat recovery metallurgical process slag

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  • CN102329900B

    The invention relates to a liquid steel slag dry-process granulating device and a sensible heat recovery method. The liquid steel slag dry-process granulating device comprises a feeding device, a dry-process granulator, a cyclone separator and a sensible heat recovery device, wherein the dry-process granulator, the cyclone separator and the sensible heat recovery device are mutually communicated.

  • Programme | Slag Valorisation Symposium

     · Dry granulation and heat recovery from metallurgical slags. 09.10 Plenary Lecture. ... Internal slag recycling and other solid wastes utilisation in metallurgical process ; Slag engineering to optimise metallurgical process (e.g. protect lining brick from degradation,…) Slag formation, slag foaming, slag minimisation in the process ...

  • Innovative new process: Thermal metal recovery from ...

    1  · The thermal metal recovery plant (TMG) will close the cycle. TMG represents an innovative pyrometallurgical process that enables the next level of further processing of fine-grained residues from an existing mechanical shredder residue processing plant. The TMG process . The planned process concept of TMG consists of seven main steps (see box).

  • Development of Heat Recovery System from Steelmaking …

    Development of Slag Heat Recovery Process 3.1 Design of Slag Heat Recovery Pilot Plant The slag heat recovery pilot plant which was built in this development is a counterflow packed bed-type heat exchanger like the one used in coke dry quenching (CDQ). However, when compared in the same condi-

  • High Temperature Rheological Characteristics of Iron and ...

    The metallurgical processes generate significant pollutant ... position of the slag. In iron making process, the metallurgical ... v W Okorie O (2020) High Temperature Rheological Characteristics of Iron and Steel Making Slag and its Waste Heat Recovery-A Review. Adv Metallurg Mater Eng 3(1):104-116

  • Liquid-Phase Recovery of the Metallurgical Slag Using ...

    The efficiency of the recovery phase depends on both temperature conditions and the composition slag, and introduced additions. The exploration of the possibility and feasibility of the liquid-phase restoration for steelmaking waste slag of the Zlatoust Metallurgical Plant applying the induction heat installation is the aim of this study.

  • FUNDAMENTALS OF ZINC RECOVERY FROM …

    follows: for LBF slag, feeding of liquid slag from a lead blast furnace through a holding furnace is an attractive energy-saving option, Schoukens et al (1995). However, dry and granulated slag (stockpiled in dumps) can be directly charged into the fuming furnace. Metallurgical coke is employed as the reducing agent and is delivered to the fuming

  • CO2 Gasification Rate Analysis of Datong Coal Using Slag ...

    CO2 gasification rate analysis of coal in molten blast furnace slag—For heat recovery from molten slag by using a chemical reaction. International Journal of Hydrogen Energy 2015, 40 (3), 1607-1615. DOI: 10.1016/j.ijhydene.2014.11.091.

  • RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A …

    granulation and heat recovery technology. Here we review common slag handling practices, the developments in dry slag granulation over the last three decades, introduce the Ecomaister-Hatch dry slag granulation process, and elaborate on future applications of the technology in the processing of argon oxygen decarburization and blast furnace slags.

  • Recycling and environmental issues of metallurgical slags ...

    furnace (EAF) for steel making and secondary metallurgical process (SMP) for refining. Correspondingly, slags can be classified as three major types: BF slag, BOF slag and SMP slag. The BF slag accounts for about twice the amount of BOF slag, and the SMP slag is relatively less significant in terms of utilization due to the lower generated amount.

  • Metallurgical Slags

     · Smelting, the process of extracting base metals from their natural states (ores), has been used since the bronze age to create precious and useful metals. Ore is decomposed in smelting with heat and a chemical reducing agent such as calcium, driving off other elements as gases or slag and leaving the metal base behind.

  • Process Concept for the Dry Recovery of Thermal Energy of ...

     · The solidified slag is volume stable and forms amorphous phases, depending on its basicity. The process was designed, and the concept was tested on lab-scale demonstrators with an overall heat recovery rate of 42%. Some applications of the recovered slag heat are also presented in this work. Scheme of the process concept with the three heat ...

  • Slag and dross | Non-Ferrous | Kuettner Group

    Slag and dross, which occur in significant amounts in every metallurgical process, have a very bad reputation as partially hazardous residues. Often rightly so, since the high heavy metal content does not allow its use as a mineral product. Only the slags, which have special standards and pass eluate tests, can today be used as building ...

  • A Review of Circular Economy Prospects for Stainless ...

     · Controlled slag cooling process gives a good opportunity for heat recovery as hot air or steam [51,52,53,54,55,56,57]. When producing amorphous slag as a substitute to cement dry granulation by air is the best choice.

  • RESEARCH OVERVIEW ON RECOVERY OF WASTE HEAT FROM …

    waste heat recovery process of liquid slag into dry centrifugal granulation process and waste heat recovery process. After dry centrifugal granulation, the temperature of blast furnace slag particles was about 900°C. Then the particles entered the packed bed for heat …

  • Energies | Free Full-Text | Heat Recovery from High ...

    Waste heat recovery from high temperature slags represents the latest potential way to remarkably reduce the energy consumption and CO2 emissions of the steel industry. The molten slags, in the temperature range of 1723–1923 K, carry large amounts of high quality energy. However, the heat recovery from slags faces several fundamental challenges, including their low thermal conductivity ...

  • heat recovery metallurgical process slag

    Heat Recovery Metallurgical Process Slag School of Materials and Metallurgy, Northeastern University, No. . Read More. disintegrating slag backwater waste heat in steel slag …The present invention relates to a method and apparatus for heat stuffy slag slag backwater boring process of waste heat utilization. Metallurgical slag waste heat

  • Granulation and Heat Recovery from Metallurgical Slags ...

     · Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 Mt/year of coal. The potential mineral and thermal energy values of slags are in the order of $22 b and $3–6 b per year. Such attractive figures, together with tightening legislation on disposal of slag and the carbon footprint associated with the loss of mineral and energy ...

  • Slag recycling

    Slag imports accounted for 5.2 % of the total in 2017. The 2015 recovery quantities for blast furnace slag are shown in Fig. 15. Granulated slag makes up 86 %, of which almost the entire amount is used in the cement industry.

  • Recovery of heat from molten slag from metallurgical ...

    We claim: 1. A method of recovering heat from slag from a metallurgical process, comprising the steps of placing a molten slag below radiant heat absorbing tubes, passing a fluid medium through the heat absorbing tubes, causing heat radiated by the molten slag and by subsequently solidified slag at high temperature to undergo transfer to the fluid medium and thereby to be recovered, and ...

  • THE SUBMERGED ARC FURNACE (SAF) STATE OF ART IN …

    In metallurgical production, the traditional aim is to increase recovery of metal to the ... non ferrous processes, a sufficient heat removal rate will create a layer of frozen slag, the so-called "freez line", which protects the remaining sidewall lining. ... Physical slag cleaning process .

  • High Temperature Rheological Characteristics of Iron and ...

     · Tobo, et al. proposed a unique process of slag waste heat recovery. The sensible heat of the sheet-shaped slag was recovered by a counter-flow packed bed type heat exchanger and showed that the heat recovery ratio is over 30%. Motz, et al. carried out research on dry solidification with heat recovery of ferrous slag. They reported that the ...

  • Comprehensive Recovery of Multisource Metallurgical …

    and achieve full slag utilization, it will favor the sustainable development of the metallurgical industry.1) The comprehen-sive recovery of multisource metallurgical wastes is likely to be one of the most effective methods to achieve this goal. Nickel slag is a metallurgical solid …

  • Pilot Experiences of Swerea MEFOS on Slag Recycling(12 …

    ecological recovery of metals, minerals and energy from hot metallurgical slag. Keywords: Slag, treatment, reduction, metal and heat recovery, granulation, slag product . 1. Introduction The metallurgical industry generates every year huge amounts of slag. The annual amount of generated steelmaking slags alone is more than 100 million tons.

  • Dry Slag Granulation with Waste Heat Recovery

     · CSIRO''s Dry Slag Granulation Process Technical Challenges – Optimum disc and reactor design – Handling of hot granules – Compact reactor for efficient recovery of high grade waste heat and lower capital cost Concept Development 2006/7 Motor Air Hotair >600 C Discharge 500 C 100 C Slag 1500 C Air ICST 2012, Dresden 6 7.

  • Pyrometallurgy Towards Clean Metallurgical Processing 2012

    Heat recovery from slag has gained attention of metal extraction processes. A direct method to r ... Direct Heat Recovery Process ... Metallurgical slags are the largest by-pn extraction processes. The total amount of metallurgic at up to 422 million tonnes contaming up to 222

  • Metallurgical process for valuable elements recovery from ...

    Metallurgical process for valuable elements recovery from red ... development of a green recovery process with environme ntal benignity, low energy requirements and cost. ... Steel making&slag additive Civil&building construction Waste&water treatment Ceramics, plastics, coatings

  • Development of Molten Slag Dry Granulation and Heat ...

    Development of Molten Slag Dry Granulation and Heat Recovery in Steel Industry. The difficulties of molten metallurgical slag (including blast furnace slag and steel slag,etc.) heat recovery caused by low thermal conductivity and high enthalpy are analyzed.The processes of molten slag dry granulation combined heat recovery by physical means ...

  • CFD modelling of dry slag granulation using a novel ...

    is also able to recover the sensible slag heat as hot air. The integrated DSG and heat recovery process has been successfully demonstrated at a pilot plant scale with throughputs of up to 5 t/h (Figure 1). Figure 1: Photos of (a) the semi-industrial scale (3 m diameter) integrated DSG and heat recovery pilot plant at

  • Research Overview on Recovery of Waste Heat from High ...

    Research Overview on Recovery of Waste Heat from High Temperature Slag Particles Zhaoyu Xiao, Shuzhong Wang, Meiquan Li, Zhiqiang Wu, Jun Zhao, Liwei Ma. Abstract. The high temperature slag discharged from metallurgical industry has the characteristics of high temperature and large discharge.

  • Treatments and Recycling of Metallurgical Slags | IntechOpen

     · Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or added during the process to improve …

  • Recovery of volatile metal values from metallurgical slags ...

    1. A process for the recovery of volatile metal values from metallurgical slags, characterized by comprising flowing a stream of molten metallurgical slag through a furnace, optionally feeding a reducing agent into said slag stream, impinging on the surface of the slag stream the heat from at least one plasma torch, removing from above the slag a gas containing metal vapours, and removing ...

  • Recovery of iron and manganese values from metallurgical ...

    Recovery of iron and manganese values from metallurgical slags by the oxidation route Anna Semykina Doctoral Thesis Division of Materials Process Science Department of Materials Science and Engineering Royal Institute of Technology SE-10044 Stockholm, Sweden Akademisk avhandling som med tillstånd av Kungliga Tekniska Högskolan i

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