Geological sequestration of carbon dioxide by hydrous ...

The carbonate formation rate is primarily governed by particle size. Slag grinding will increase the reaction surface area, and is itself carbon dioxide sequestration net positive. The grinding cost can be recouped by recovering liberated steel particles. The critical (economic) grind size for BOF and EAF slag is 100-150 μm, and for LMF slag is

Carbonation-Activated Steel Slag Binder for Cement ...

Jun 24, 2015· Because of its chemical composition and high temperature process, steel slag is carbon dioxide reactive. This property can be utilized to develop steel slag binder to replace Portland cement in making precast building products. This paper summarizes a recent study on the carbonation activation of steel slag for cementing binder application.

High-strength KOBM steel slag binder activated by carbonation

The feasibility of developing a high strength KOBM (Klockner Oxygen Blown Maxhutte) steel slag binder activated by carbonation as an alternative cementing material was investigated.

Accelerated carbonation of steel slags in a landfill cover ...

Accelerated carbonation of steel slags in a landfill cover construction S. Dienera,*, L. Andreasa, I. Herrmanna, H. Eckeb, A. Lagerkvista a Division of Waste Science and Technology, Luleå University of Technology, 971 87 Luleå, Sweden bCivil and Materials Engineering, Vattenfall Research and Development AB, SE-814 26 Älvkarleby, Sweden article info ...

Loesche Mills for Metal Recovery and Filler Production ...

Metal Recovery and Filler Production from Steel Slag. 2 This dry process developed by Loesche for recovering metals from steel slag combines all the advantages of conventional processes: ... Dry grinding Loesche DGL Complete dry grinding of the mineral matrix,

Carbonation of Stainless Steel Slag as a Process for CO2 ...

Oct 20, 2010· This paper examines the main results of an accelerated carbonation treatment applied to different types and size fractions of stainless steel slag. The objectives of this work were essentially to assess the CO 2 uptake achievable by each type of slag under mild operating conditions and to investigate the effects of carbonation on the mineralogy ...

CO Sequestration by Solid Residues Carbonation for ...

carbonation of steel slag in an autoclave reactor[7-8]. In comparison with naturally occurring wollastonite (CaSiO3), steel slag was able to sequester 11 times more CO2 at ambient ... released during grinding and removed, and the rest particles were classified by …

Accelerated Carbonation of Steel Slags Using CO2 Diluted ...

terms of the type of BOF slag treated, the carbonation reaction time (from 0.5 to 24 h), and the gas composition considered (10, 40, or vol.). Ma Terials anD Me hODs The slag samples tested in this work were collected from a steel plant employing the integrated steelmaking process both directly

Performance evaluation for carbonation of steel-making ...

CO 2 sequestration by the aqueous carbonation of steel-making slag under various operational conditions was investigated in this study. The effects of the operational conditions, including type of steel-making slag, reaction time, reaction temperature, and CO 2 flow rate, on the performance of the carbonation process were evaluated. The results indicated that the BOF slag had the highest ...

Carbonation | Orbix

In order to provide sufficient raw material for the carbonation process, an innovative grinding mill has been integrated in the factory due to which we can process rough metal slag into a fine fraction (filler) suitable for carbonation on the one hand, and can recover the existing metal on the other.

Direct Gas–Solid Carbonation Kinetics of Steel Slag and ...

Carbonation conversions between 49.5 % and 55.5 % were achieved in a typical flue gas at 600 °C, with the maximum CO 2 sequestration amount generating 88.5 kg t slag −1. Direct gas–solid carbonation of steel slag showed a rapid CO 2 sequestration rate, high CO 2 sequestration amounts, low raw-material costs, and a large potential for waste ...

Investigation of a Two-Stage Aqueous Reactor Design for ...

for Carbon Dioxide Sequestration Using Steelmaking Slag S.N. LEKAKH, D.G.C. ROBERTSON, C.H. RAWLINS, V.L. RICHARDS, and K.D. PEASLEE Hydrous carbonate sequestration of carbon dioxide using steelmaking slag was studied using a METSIM process model to analyze experimental data and estimate the reactor operating results.

Review of CO 2 Reduction Technologies using Mineral ...

Review of CO 2 Reduction Technologies using Mineral Carbonation of Iron and Steel Making Slag in Malaysia ... Technologies using Mineral Carbonation of. ... materials from steel slag with the wet ...

Accelerated carbonation and performance of concrete made ...

Accelerated carbonation and performance of concrete made with steel slag as binding materials and aggregates ... X. HuangEnhance hydration properties of steel slag using grinding aids by mechanochamical effect. ... T. De Kock, M.N. Boone, M. Quaghebeur, V. CnuddeMonitoring of stainless-steel slag carbonation using X-ray computed microtomography ...

Frontiers | Accelerated Carbonation of Steel Slags Using ...

Jan 18, 2016· Accelerated Carbonation of Steel Slags Using CO 2 Diluted Sources: CO 2 Uptakes and Energy Requirements. ... (BOF-a and BOF-c) after grinding ... in conclusion the results of this study suggest that accelerated carbonation of BOF steel slag may be applied as a process to directly store the CO 2 content of diluted gas flows such as syngas or ...

Accelerated Carbonation of Steel Slag Compacts ...

Dec 17, 2015· Mineral carbonation involves the capture and storage of carbon dioxide in carbonate minerals. Mineral carbonation presents opportunities for the recycling of steel slags and other alkaline residues that are currently landfilled. The Carbstone process was initially developed to transform non-hydraulic steel slags (stainless steel slag and basic oxygen furnace slags) in high quality construction ...

Steel Slag Grinding Carbonation - mixmasala.be

carbonation of steel slag in an autoclave reactor[7-8]. In comparison with naturally occurring wollastonite (CaSiO3), steel slag was able to sequester 11 times more CO2 at ambient ... released during grinding and removed, and the rest particles were classified by Tyler standard screen.

Comparative Life-Cycle Assessment of Slurry and Wet ...

modelled with LCA included again grinding of the residues to the desired size and CO 2 compression, whereas no heat recovery step was included. In both cases, transportation of steel slag to the carbonation plant and of the carbonated product to the landfill site and landfilling of the carbonated products obtained were considered.

Accelerated Carbonation of Steel Slag Compacts - Frontiers ...

Accelerated Carbonation of Steel Slag Compacts on lab scale by optimization of the process parameters, such as pressure, temperature, and pretreatment of the raw material feed. The technology was then further developed and validated using (semi-)industrial equipment and process conditions. Both the technical and environmental properties of the ...

Solidification of stainless steel slag by accelerated ...

carbonation was applied to ground stainless steel slag at elevated pressure for a period of 1 hour in order that it may be re-cycled and find a beneficial use. The effects of the addition of OPC, the mineralogical composition of the slag and the effect of grinding the slag on the carbonation reaction are presented. MATERIALS AND METHODS

Mineral CO2 Sequestration by Steel Slag Carbonation ...

Ground steel slag was carbonated in aqueous suspensions to study its reaction mechanisms. Process variables, such as particle size, temperature, carbon dioxide pressure, and reaction time, were systematically varied, and their influence on the carbonation rate was investigated. The maximum carbonation degree reached was 74% of the Ca content in ...

EP0542330B1 - Porous granulated steel slag composition and ...

EP0542330B1 EP19920203206 EP92203206A EP0542330B1 EP 0542330 B1 EP0542330 B1 EP 0542330B1 EP 19920203206 EP19920203206 EP 19920203206 EP 92203206 A EP92203206 A EP 92203206A EP 0542330 B1 EP0542330 B1 EP 0542330B1 Authority EP European Patent Office Prior art keywords steel slag granulated slag porous according Prior art date 1991-10-23 Legal status (The …

Carbonation of Stainless Steel Slag as a Process for CO 2 ...

This paper examines the main results of an accelerated carbonation treatment applied to different types and size fractions of stainless steel slag. The objectives of this work were essentially to assess the CO2 uptake achievable by each type of slag

Steel Slag - Material Description - User Guidelines for ...

Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. The slag occurs as a molten liquid melt and is a complex solution of silicates and oxides that solidifies upon cooling.

Applications of Steel Slag Powder and Steel Slag Aggregate ...

The applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete fracture surface. The results show that the fluidity of the paste containing ...

CO 2 Mineralization and Utilization using Steel Slag for ...

The carbonated slag can be successfully utilized as green construction materials in blended cement mortar. By this modulus, the global CO2 reduction potential using iron and steel slags was ...

Cost evaluation of CO2 sequestration by aqueous mineral ...

A cost evaluation of CO 2 sequestration by aqueous mineral carbonation has been made using either wollastonite (CaSiO 3) or steel slag as feedstock.First, the process was simulated to determine the properties of the streams as well as the power and heat consumption of the process equipment.

What is the economic benefit of steel slag grinding and ...

The use of steel slag grinding as a blending material of concrete and cement has high comprehensive benefits, which is an effective way to speed up the environmental protection of steel mills and promote large-scale utilization of steel slag, and has good environmental benefits.