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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
Various slags are produced as by-products in metallurgical processes or as residues in incineration processes. According to the origins and the characteristics, the main slags can be classified into three categories, namely ferrous slag, non-ferrous slag and incineration slag. This paper analysed an
Sep 01, 2011 Metallurgical slags are conventionally divided into ferrous and nonferrous, based on the metal produced in each process. The typical chemical composition and generation rate of various slags for the major metal manufacturing processes are provided in Table 1, Table 2.As seen, the relative amount of slag produced per ton of ironsteel is lower than the non
companies in the metallurgical industry. The energy recovered from these waste ... heat recovery process. A three-step process which claims to recover more of the heat has recently been proposed 7. ... Heat recovery from slag is being researched .
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
Blast furnace slag BF slag, is the main by-product in the ironmaking process, which contains large amounts of sensible heat. To recover the sensible heat, this paper described the hot ...
Dec 09, 2019 Metallurgical slags are produced at a massive rate of over 750 Mtyear, and carry a thermal energy equivalent to 40 Mtyear of coal. The potential mineral and thermal energy values of slags are in the order of 22 b and 36 b per year. Such attractive figures, together with tightening legislation on disposal of slag and the carbon footprint associated with the loss
Dry granulation and heat recovery from metallurgical slags. 09.10 Plenary Lecture. Patrick Ammerlaan SQAPE. Commercialising geopolymers and gaining trust in the Dutch market through the patented SQAPE technology. 09.50 Coffee break. 10.20-12.00. Session 9 Alternative heating, cooling and reactivity. 10.20 Willem Deleu MEAM
2.2. Pilot-scale Slag Heat Recovery Experiment. As a next step to verify the feasibility of this process, pilot-scale slag heat recovery experiments were carried out with a heat recovery chamber having an inner diameter 6.5 times larger than the previous laboratory-scale device. 20,21 Figure 3 is a schematic diagram of this pilot plant. The left side of Fig. 3 shows a twin-roll type slag ...
CO2 gasification rate analysis of coal in molten blast furnace slagFor heat recovery from molten slag by using a chemical reaction. International Journal of Hydrogen Energy 2015, 40 3 , 1607-1615. DOI 10.1016j.ijhydene.2014.11.091.
The slag is in the metallurgical process used to separate undesired elements contained in the raw materials yielding the desired product, a metal or alloy. In its post process, slag has potential for utilization in external applications, e.g construction, provided technical and environmental performance is controlled.
Heat recovery from blast furnace slags is often contradicted by another requirement, to generate amorphous slag for its use in cement production. As both the rate and extent of heat recovery and slag structure are determined by its cooling rate, a relation between the crystallization
1 Metallurgical and Materials Engineering, Montana ... Reduction time and temperature and carbon content were shown to be the most important process variables for the reaction which were optimized to identify the most favored operating regime that maximizes the metal recovery and simultaneously maximizes the hardness of the secondary slag and ...
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.
Development of Molten Slag Dry Granulation and Heat Recovery in Steel Industry DAI Xiao tian,QI Yuan hong,ZHANG Chun xia State Key Laboratory for Advanced Steel Processing and Products, Central Iron and Steel Research Institute, Beijing 100081, China
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.
Aug 09, 2016 CSIROs 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 20067 Motor Air Hotair 600 C Discharge 500 C 100 C Slag 1500 C Air ICST 2012, Dresden 6 7.
May 07, 2018 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
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
Oct 27, 2011 The word Basic is used to indicate the type of refractory lining needed, normally magnesia, to resist the lime-rich slag. This is a batch process with each batch known as a heat where oxygen is blown from above into the steel, and the different elements present oxidise in a predictable order.
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.
Energy Recovery from Metallurgical S lags ... was conducted to simulate the transient breakup process of molten slag k is the turbulent kinetic energy, and is the specific dissipation rate ...
Undreamt of metallurgical treasures. 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.
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