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For BOF slag treatment, above mentioned pyrolytic self-slaking, HK, and BSSF processes are being accepted. No process considered the heat recovery from molten slag during granulation processes. Large scale application of stabilised steel slag powder in construction is a good way for steel slag .
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, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag .
step, a heat transfer model for calculating the ten developed. The details of this model and the gov MATHEMATI Direct Heat Recovery Process A simple process in which slag is granulatec droplets are released into a vertical heat recovery construction or land filling or as coarse aggregate for dly, the slag can be used as a substitute for Portland
The difficulties of molten metallurgical slag heat recovery caused by low thermal conductivity and high enthalpy are analyzed.Centrifugal granulation is an environment-friendly process in treating ...
The energy in slag is lost through dumping and water granulation processes, and where slag is sold as a by-product, it is for its chemical content only. Here, dry granulation processes also offer advantages including the production of by-products which hold value in both their chemical content and physical properties and heat recovery.
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
When the molten slag is rapidly cooled by water, a large amount of granulated and amorphous blast furnace slag is produced, and the physical and chemical properties of these slags mainly depend on the production process. It is worth noting that a lot of water and heat are wasted in this process.
Furnace classification by heat source – Heat is generated in the furnace to increase the furnace temperature to a level which is higher than the temperature needed for the process, either (i) by the combustion of a fuel, or (ii) by conversion of electric energy to heat. Some furnaces also utilize the waste heat from the metallurgical process.
Metallurgical slag and dust (MSD) from lead and zinc smelting, steel dust and galvanized steel scrap are important secondary sources of zinc and other valuable metals. This paper describes the production feasibility and rationality of a cleaner zinc recovery process using MSD and a hydrometallurgical method. It was found that the addition of CH3COONH4 to a NH3–H2O system promotes zinc ...
Better trouble-shooting capabilities for metallurgical process problems or deficiencies. More accurate determination of process efficiency and recovery rates. More informed flowsheet design and modification. Improved information flow to management. Increase in .
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 steelmaking practice. Steelmaking slag added into ladle slags makes it possible to minimize slag .
Apr 01, 1987· 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 .
The granulation and heat recovery technologies towards molten slag of steel industry are reviewed. The working principle, research status, challenges and prospects of these technologies are analyzed. Centrifugal granulation combined with chemical heat recovery .
Waste Heat Recovery from High-Temperature Blast Furnace Slag Particles Junxiang Liu1,2, Qingbo Yu1*, Jiayan Peng1 and Wenjun Duan1 . 1. School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, P R China . 2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093, P R China
After her technical chemistry degree at the Graz University of Technology with focus on process engineering she did her PhD in synthetic biofuels. Her experience in metallurgical and energy recovery topics she got during developing a new process line for primary converter dedusting, including a heat recovery unit and a filter unit.
Process Metallurgy Module for Steel and Slag The Process Metallurgy Module is a calculator within Thermo-Calc that makes it easy to set up calculations for steel and slag. The module is primarily designed for application to steel-making and steel refining processes including converters, such as basic oxygen furnaces, electric arc furnaces ...
Aug 09, 2016· Dry Slag Granulation with Waste Heat Recovery 1. MINERALS DOWN UNDER NATIONAL RESEARCH FLAGSHIP Current Status & Future Direction of CSIRO's Dry Slag Granulation Process with waste heat recovery ICST 2012, Dresden, Germany: 1-3 October, 2012 Sharif Jahanshahi and Dongsheng Xie 2.
Potential of melted slag as heat source Melted slag at 1500℃has sensible and latent heat of about 400 – 500 cal/g. If half of the heat of melted slag is to be recovered in Japan, the total heat recovery will be equivalent to about 1 Mt of coal. =0.5％of annual coal import of .
Sep 05, 1978· It is an object of this invention to provide a method and apparatus for efficiently recovering heat from slag from a metallurgical process by effectively collecting the sensible heat of the slag as heat contained within steam or some other high-temperature fluid or gas through radiant heat absorbing tubes for heat absorption and recovery.
Jul 11, 2018· Metallurgical slag and dust (MSD) from lead and zinc smelting, steel dust and galvanized steel scrap are important secondary sources of zinc and other valuable metals. This paper describes the production feasibility and rationality of a cleaner zinc recovery process using MSD and a hydrometallurgical method.
FUNDAMENTALS OF ZINC RECOVERY FROM METALLURGICAL WASTES IN THE ENVIROPLAS PROCESS Masud A. Abdel-latif Mintek, Randburg, Republic of South Africa Masudal@mintek KEY WORDS: Enviroplas, D.C. Arc Furnace, ISP Condenser, EAF Dust, LBF Slag, Dross, Premelting, Smelting, Zinc Fuming. ABSTRACT
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 ing, slag minimisation in the process ...
In addition to slag recovery, the liquid furnace slag and ladle slags are generally processed to recover the ferrous metals. ... which is highly dependent on the rate of slag cooling in the steel-making process. Table 18-2. Typical steel slag chemical composition. ... Due to their high heat capacity, steel slag aggregates have been observed to ...
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.
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