Heat recovery from slag improves energy efficiency of furnaces

Formerly slag was poured into slag pits and allowed to solidify and cool with no . attempt at heat recovery. Cooled slag was "mined" and processed for re-use in other industries such as the cement and concrete makers. The resultant slag has low utilisation values because of their weak hydraulicity due to the high content of crystalline phases.

2-Recovery of Copper and Cobalt from Copper Slags as …

Recovery of Copper and Cobalt from Copper Slags as Selective 389 intervals. By treatment with hot water, recovery of copper and cobalt from the ore mixture was aimed selectively. 2. Experiment 2.1 Sample Preparation The slag sample used in this investigation is a composite from different levels of the copper slag

The Recovery of Chrome and Manganese Alloy Fines from Slag

The new classifier was able to produce very high grade ferromanganese at up to 5 tons per day metal recovered. As a result of the success of the Apic classifier at Canon a large classifier bank has been built for MARS (Metal Alloy Recovery Systems), Ferrochrome from slag recovery plant at Middelburg Ferrochrome. 2. OPERATION OF THE APIC CLASSIFIER

Waste Heat Recovery from High-Temperature Blast Furnace ...

slag, the recovery efficiency of thermal energy is low, which was caused by energy loss in every step. Based on the problem mentioned above, a technique of thermal energy recovery from molten slag was exploited. The molten slag was granulated by a rotary cup and the thermal energy of slag particles with high

Application of Phase Change Materials in Heat Recovery ...

Application of Phase Change Materials in Heat Recovery from Blast Furnace Slag ... Keywords — PCM, Recovery, Slag, Rankine Cycle I. INTRODUCTION Energy conservation has been the hot topic for ... high i.e. 800oC [2] and is nearer to slag temperature.

US6264039B1 - Method for precious metal recovery from slag ...

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 ...

Integration of coal gasification and waste heat recovery ...

Nov 12, 2015· Integration of coal gasification and waste heat recovery from high temperature steel slags: an emerging strategy to emission reduction ... Bisio, G. Energy recovery from molten slag and ...

Dry Granulation of Blast Furnace Slag for Energy Recovery ...

Dry Granulation of Blast Furnace Slag for Energy Recovery Around 300 kg of liquid slag is produced as byproduct while producing one ton of hot metal in a blast furnace (BF). This slag is at a temperature of around 1500 deg C and has a sensible heat of approximately 400 M Cal per ton.

slagprocessing.com

High Grade Iron recovery from steel manufacturing slag using new innovative patented process. For product information during site construction contact: Granite City facility 4 Caine Drive Madison, Illinois 62060 618-877-4990 Office 618-381-0135 Cell 618-877-4965 Fax [email protected]

Recovery of Manganese From Steel Plant Slag by Carbamate ...

r ----- RECOVERY OF MANGANESE FROM STEEL PLANT SLAG BY CARBAMATE LEACHING By Synthia N. Mcintosh 1 and Elizabeth G. Baglin2 ABSTRACT The U.S. Bureau of Mines investigated the feasibility of using ammonium carbamate (NH2C02NH4) leaching to recover manganese from steel plant slag.

Recovery of phosphates from wastewater using converter ...

5. Conclusions This study shows that powdered converter slag is a practicable seed crystal for a phosphorus crystallization process providing a stable and high rate of phosphate recovery. After about 200 d the slag doubles in apparent volume by crystal growth, indicating the feasibility of using the recovered seed crystals as a phosphorus resource.

S. J. Pickering/New process for dry granulation and heat ...

A new dry granulation process for molten slag is described. The process produces a slag product of high glass content, suitable for cement manufacture, and allows heat recovery from the slag. Experimental tests have been carried out on a laboratory-scale plant to prove the new process.

Enhancement of Iron Recovery from Steelmaking Slag Fines ...

Jul 28, 2016· Abstract. Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to replace high-cost steel scrap and iron ores.

Nonferrous Slags - Material Description - RMRC

Nonferrous slags are produced during the recovery and processing of nonferrous metal from natural ores. The slags are molten by-products of high temperature processes that are primarily used to separate the metal and nonmetal constituents contained in the bulk ore. When cooled, the molten slag converts to a rocklike or granular material.

Recovery of Phosphorus from Dephosphorization Slag ...

Request PDF on ResearchGate | Recovery of Phosphorus from Dephosphorization Slag Produced by Duplex High Phosphorus Hot Metal Refining | Phosphate …

Recovery of Phosphorus from Dephosphorization Slag ...

Request PDF on ResearchGate | Recovery of Phosphorus from Dephosphorization Slag Produced by Duplex High Phosphorus Hot Metal Refining | Phosphate rock is a …

Slag - Wikipedia

Slag is the collection of compounds that are removed. In many smelting processes, oxides are introduced to control the slag chemistry, assisting in the removal of impurities and protecting the furnace refractory lining from excessive wear. In this case, the slag is termed synthetic.

Nickel recovery from electric arc furnace slag by magnetic ...

The size classification of the EAF slag reveals that the coarser particles have increased nickel grade, which is slightly inferior to that of the raw laterite feed, and satisfactory nickel recovery. Also, the slag underwent magnetic separation as potential method to recover nickel from the slag.

Nickel Smelting and Refining - IFC

Nickel Smelting and Refining. 351. should be recycled. To the extent possible, all pro-cess effluents should be returned to the process. Treatment Technologies. The discharge of particulate matter emitted dur-ing drying, screening, roasting, smelting, and converting is controlled by using cyclones fol-lowed by wet scrubbers, ESPs, or bag ...

Steel Slag Processing — Ecofertec

One plant can handle 1,5 M ton of slag per year. Ecofer metal recovery plant has highest processing rate and lowest electricity consumption comparing to competitors. Ecofer plant has very high metal recovery even up to 99% and very high cleanness even up to 95%.

Slag/Dross Recovery- - Metalcess

The commonly-seen slag/dross/residue includes copper dross, lead dross, tin slag, zinc leaching residue, antimony/arsenic dross, cadmium residue/cake, sulfur residue/cake, vanadium slag, nickel slag, iron tailing and iron bearing red-mud waste.Metalcess is a professional company offering metal extracting/ recovery/ recycling solutions. We have rich experience in slag treatment.

Fayalite Based Slags: Metal Recovery and Utilization

microstructure of the slag. This paper reviews existing and novel routes for metal recovery and fayalite slag utilization. Keywords: slags, fayalite, microstructure, non-ferrous metals recovery, utilization, leaching Abstract In order to achieve full valorization of the slag, the combination of the two schemes is worthwhile to be considered.

Nickel Smelting and Refining - IFC

ing for their recovery. Slag can be used as construction material after nickel recovery, as appropriate (e.g., re turn of converter slag to the furnace). Sanitary sewage effluents require treat-ment in a separate facility or discharge to a mu-nicipal sewer. Modern plants using good industrial practices are able to achieve the pollutant loads ...

US20130154168A1 - Dry processing of, and thermal recovery ...

Apparatuses, systems, and methods discussed herein facilitate processing of, and thermal recovery from, material such as slag. A disk assembly is configured to process material. One or more heat exchangers are configured to extract heat that is already present in the material, heat generated during processing, or both. A thermal transfer system is configured to transfer heat away from the disk ...

Iron Recovery from Discarded Copper Slag in a RHF Direct ...

the slag cannot be effectively utilized. Main methods in use for iron recovery from copper slag include direct beneficiation for iron recovery [3], oxidative modification [4,5] of iron oxide for iron recovery, smelting reduction for iron recovery [6,7], and direct reduction (DR) for iron recovery [8,9], etc.

(PDF) Electroslag Remelting of High Technological Steels ...

The experimental results show that high recovery of alloying elements during electroslag remelting of such steels especially high nitrogen tool steel. The previous results are attributed to the slag used in electroslag protect the molten metal from atmospheric oxygen.

Dissolution of Valuable Metals from Nickel Smelter Slags ...

Granulation of slag melt can produce an amorphous solid solution of SiO 2 and metal oxides. Amorphous slag is not amenable to HPOXAL due to the formation of a passive layer of silica. Leaching of amorphous slag at low temperatures was shown to proceed nearly to completion. The difference in the leachability of amorphous slag at high and

Energy recovery from high temperature slags - ScienceDirect

It also reduces the agglomeration of slag particles at high temperature. This process was tested in full scale of 40 t/hr at Wakayama Steel Works, with a reported 50–60% recovery of the slag …