The present invention, therefore, provides stage crushing method for recovering precious metals from slag produced by a coal burning furnace or boiler comprising: a plurality of crushing steps, wherein each crushing step produces slag particles having successively smaller particle diameter sizes, said crushing steps continued until a final desired particle diameter sized is obtained; wherein
Dry Granulation of Blast Furnace Slag for Heat Recovery Blast furnace slag is known as a by-product from the production of hot metal at integrated steel and iron mills. Approximately 300 kg of this liquid slag with a temperature of about 1500°C is tapped together with each ton hot metal.
Metal recovery take out all residual metal from slags and ashes Processes for metal recovery reach from fairly simple to highly complex depending on the value and content of the metal in the slag on one side, and on the desired application for the residual slag on the other side.
2017-08-12· PROCESSES FOR THE DRY PROCESSING OF STEEL SLAGS WITH LOESCHE MILLS FOR METAL RECOVERY AND PRODUCTION OF SILICATE COMPOSITE MATERIAL FOR USE IN THE BUILDING MATERIALS INDUSTRY Dr.-Ing. Holger Wulfert, Loesche GmbH Dr.-Ing. Andreas Schiffers, CALA Aufbereitungstechnik GmbH & Co KG
2020-05-17· Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal
2011-06-20· Metal Recovery Fast cooled The main constituents of a copper slag are FeO and SiO 2, each present at about 20-55 wt%. The copper content of a smelter slag is normally around 1 wt% while converter slag contains in general much more Cu (2~25 wt%), which is
2014-07-08· Some Fundamental Aspects of the Dry Slag GranulationProcess . Sharif Jahanshahi*, Yuhua Pan and Dongsheng Xie . CSIRO Minerals Down Under National Research Flagship, Clayton, Victoria, 3168, Australia . Abstract: There is a growing interest in development of a dry slag granulation (DSG) process so as to recover the sensible and latent heats from molten slags and convert iron blast
2017-08-12· This dry process developed by Loesche for recovering metals from steel slag combines all the advantages of conventional processes: • Efficient and cost-effective metal recovery in the coarse range • Virtually 100% metal recovery down to the finest fractions range by means of optimised dry grinding, classification and sorting technology
Our associates look back on a long term professional experience in many fields of materials engineering covering a wide range of minerals such as ores and coal, industrial minerals, construction materials (sand, gravel, crushed rock, other aggregates) and the recycling of secondary raw materials.
This dry process developed by Loesche for recovering metals from steel slag combines all the advantages of conventional processes: Efficient and cost-effective metal recovery in the coarse range Virtually metal recovery down to the finest fractions range by means of optimised dry grinding, classification and sorting technology
2017-03-03· 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
2020-05-02· saved. In summary dry granulation of blast furnace slag allows an environmental friendly and sustainable subsequent processing for one of the last big heat recovery potentials at a modern blast furnace.  References  McDonald, I., Long, E., Werner, A. & Most, D. (2010) Dry slag granulation The environmental friendly way to making cement.
BF slag contains little metal and recovery of metal from it is not important. Steel slag is usually subjected to metal recovery prior to its application outside the iron and steel making process. By applying mineral processing technologies such as crushing, grinding, classification and magnetic separation, it is possible to produce steel scrap (Fe: 90%) and iron concentrate (Fe>55%) from steel
Dry slag granulation with heat recovery. Primetals Technologies, voestalpine Stahl, the FEhS Building Materials Institute and the University of Leoben joined forces in an R&D program to develop a new dry-granulation technology using air to cool molten slag