slag of modified steelworks by metallurgical process in cement

Process for producing cement from metallurgical slag ...

In a process for the preparation of cement from metallurgical slags, in which liquid slags from reduction processes and steelworks processes, e.g. blast furnace and converter slag, are mixed together and mixed with lime the procedure is such that in a first cooling phase at temperatures above 1000° C., and preferably above 1200° C., the cooling is slower than in a subsequent second cooling ...

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Treatment of Molten Steel Slag for Cement Application ...

Steel slag can be an alternative in cement mineral admixture, partially as a substitute for blast furnace slag. A pyrometallugical process has been investigated to promote the chemical composition modification of molten steelmaking slag in a metallurgical reactor. Experiments were conducted by remelting 300 kg of steel slag followed by chemical ...

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Metallurgical slag as a component in blended cement ...

2002-12-1  Recovery of Nb, Mn and P from slag is reported by some researchers. In the process, it was found that P slag can be used directly as a fertilizer. Other types of metallurgical slag are used as construction materials. Cement–metallurgical slag blended cements give compressive strengths in the range of 15–30 MPa [6].

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Use of steel slags in the cement industry - Cement Lime

2010-6-1  It is necessary to differentiate in this context between whether steel slag, such as LD slag, for example, is merely ground and mixed with Portland cement (e. g. [11–14 and figs. 2-4)]) and whether the liquid slag is firstly chemically modified and then cooled (e.g. [15, 16]).

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Modification of Basic Oxygen Furnace Slag for Cement ...

2017-6-19  The purpose of the conducted experiments was to verify the effect of the cooling process and chemical composition on slag crystallization. Modified slags were

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Recycling physically sorted steelworks slag for the ...

2017-1-29  Recycling physically sorted steelworks slag for the metallurgical and cement indus-tries: conclusions of the ORLA research project. EUROMAT 2011 - European Congress and Exhibition on Advanced Materials and Processes, Sep 2011, Montpellier, France. C52 (Funda-mentals, concepts and implementation of sustainable high temperature metallurgical process,

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Characteristics of steel slags and their use in cement and ...

2018-9-1  According to Han et al. (2015), the hydration process of BOF slag can be divided into five stages, which is similar to that of pure cement. In the initial hydration period (0–1 h) of blended cement with BOF slag, the hydration heat evolution rate and cumulative hydration heat increased with an increase of slag substitution ratio (Fig. 3a and c).

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(PDF) Recycling physically sorted steelworks slag for the ...

PDF On Sep 12, 2011, Françoise Bodenan and others published Recycling physically sorted steelworks slag for the metallurgical and cement industries: conclusions of the ORLA research project ...

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Adsorption capacity of modified metallurgical slag

2012-11-12  cement, concrete, railroad ballast, roof coverings, mineral wool, glass, etc.); 2) extraction of useful ... efficiency of such treatment processes. The BFS chemical composition and structure play a key role ... Adsorption capacity of modified metallurgical slag The formation of melilites in Kremikovtsi BFS is limited by its low Al 2 O

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(PDF) Steel Slag as A Road Construction Material

Cooled-solidified metallurgical ferrochrome slag is known to be a material with physical properties similar to natural aggregates and is a potentially good material for use as

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Metallurgical slag as a component in blended cement ...

2002-12-1  Recovery of Nb, Mn and P from slag is reported by some researchers. In the process, it was found that P slag can be used directly as a fertilizer. Other types of metallurgical slag are used as construction materials. Cement–metallurgical slag blended cements give compressive strengths in the range of 15–30 MPa [6].

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Modification of Basic Oxygen Furnace Slag for Cement ...

2017-6-19  The purpose of the conducted experiments was to verify the effect of the cooling process and chemical composition on slag crystallization. Modified slags were produced in a metallurgical reactor [] by adding a modifying agent to 300 kg of molten BOF steel slag (SS) supplied by a steelmaking company in Brazil.Such modifying agent is composed of a byproduct rich in silicon from a metallurgical ...

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Use of steel slags in the cement industry - Cement Lime

It is necessary to differentiate in this context between whether steel slag, such as LD slag, for example, is merely ground and mixed with Portland cement (e. g. [11–14 and figs. 2-4)]) and whether the liquid slag is firstly chemically modified and then cooled (e.g. [15, 16]).

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Characteristics of steel slags and their use in cement and ...

2018-9-1  According to Han et al. (2015), the hydration process of BOF slag can be divided into five stages, which is similar to that of pure cement. In the initial hydration period (0–1 h) of blended cement with BOF slag, the hydration heat evolution rate and cumulative hydration heat increased with an increase of slag substitution ratio (Fig. 3a and c).

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Slag recycling - recovery

In addition, 7.4 Mta of steelworks slag was produced. Fig. 9 shows the amounts recovered. It can be seen that only granulated blast furnace slag (GBFS) can be used as a cement additive. For ready-mixed concrete and other types of concrete, both normal blast furnace slag and steelworks slag are used with respective totals of 38.7 % and 20.3 %.

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Adsorption capacity of modified metallurgical slag

2012-11-12  cement, concrete, railroad ballast, roof coverings, mineral wool, glass, etc.); 2) extraction of useful ... efficiency of such treatment processes. The BFS chemical composition and structure play a key role ... Adsorption capacity of modified metallurgical slag The formation of melilites in Kremikovtsi BFS is limited by its low Al 2 O

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POSSIBILITIES FOR THE UTILIZATION OF

2020-1-5  metallurgical installations (lines, departments, iron-works and steelworks), or the implementation of new technical and technological solutions. The predominating types of waste forming in iron and steel metallurgy are: metallurgical slag, scale,

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(PDF) Solidification of Bof Slags Modified by ...

(21 °C/s) 2.3 Experimental Devices for Slag Cooling and Figure 4 shows the circular cooled mold for quick Evaluated Cooling Rates cooling, where it can basically be described as a copper mold, subjected to intense heat exchange by cooling with Modified slags produced in the metallurgical reactor water, during the collection and pouring step of ...

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ZEWA – metallurgical process for treatment of residues ...

The ZEWA process converts blends of industrial waste materials and residues into hot metal and mineral products such as hydraulic binders for cement production, metallurgical powders for ...

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Recycling Steel Remnants With SCARABAEUS® Pelletizing

2020-9-22  Defined particle sizes of the steelworks remants pellets are a pre-requisite for Waelz kiln optimization. Typically the pellets have a moisture content of approx. 14 wt.%. The target size of the pellets is mostly approx. 4 to 8 mm. The capacity of the SCARABAEUS® in the recycling sector is approx. 50,000 to 150,000 t/a.

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Recycling and environmental issues of metallurgical slags ...

2004-1-18  furnace (EAF) for steel making and secondary metallurgical process (SMP) for refining. Correspondingly, slags can be classified as three major types: BF slag, BOF slag and SMP slag. The BF slag accounts for about twice the amount of BOF slag, and the SMP slag is relatively less significant in terms of utilization due to the lower generated amount.

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Steel Slag Aggregate Used in Portland Cement Concrete:

2012-1-1  In this research, laboratory investigations of the use of steel slag as a portland cement concrete (PCC) aggregate were reviewed. Much of this research took place outside the United States. Some limited field cases of the use of steel slag in pavements were found.

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Use of steelworks slag in Europe (Journal Article) OSTI.GOV

1996-12-31  Use of steelworks slag in Europe. Full Record; Other Related Research; Abstract. At any time the steel industry has been a pioneer for recycling. Recycling of scrap and the early use of blast furnace slag products on a high level are only two excellent examples. As a result of a comprehensive research during recent years in all European ...

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THE SIGNIFICANCE OF IRON AND STEEL SLAG AS BY-

2012-5-28  slag as by-product is used for satisfying diverse human needs, from the production of medicines and agro-technical agents to production of cement and construction elements. This paper demonstrates the possibilities of using slag as one small part of industrial waste arising from the metallurgical processes of iron and steel production.

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Advances in Deformation Performance of Concrete with

The deformation performance of concrete with steel slag aggregate and scrap tire particles was reviewed. The addition of steel slag makes the volume of concrete present expansion effect which can improve the early-age plastic cracking performance of concrete. The expansion of steel slag concrete and shrinkage of concrete by partially substitution of rubber colloidal particles showed obvious ...

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Blast Furnace Slag FLY ASH REFERENCE Aggregate ...

2016-1-17  Blast Furnace Slag in Cement and Concrete’ 1,10. As there are many types of slag, it should be noted that the term ‘slag’ used throughout this publication refers specifically . to metallurgical slag produced in modern blast furnaces (i.e. blast furnace slag and not basic oxygen steel slag or electric

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Iron and Steel Slag Utilization: A Comprehensive Analysis

2019-8-21  This process is much quicker and requires a small area relatively. • ISC process: The molten slag is poured into a steel box in which it solidifies and then subjected to water sprinkling and immersion cooling. • Rapid cooling process: The molten slag is poured into a special drum in which it is cooled rapidly by sprinkling water over the slag.

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(PDF) Solidification of Bof Slags Modified by ...

(21 °C/s) 2.3 Experimental Devices for Slag Cooling and Figure 4 shows the circular cooled mold for quick Evaluated Cooling Rates cooling, where it can basically be described as a copper mold, subjected to intense heat exchange by cooling with Modified slags produced in the metallurgical reactor water, during the collection and pouring step of ...

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CURRENT DEVELOPMENT OF SLAG VALORISATION IN

2013-4-9  accelerated cooling under controlled water flow, thus forming vitreous solidified slag sand. The most popular process for hot stage slag treatment of large scale blast furnace is the INBA or modified INBA. The INBA process was developed by SIDMAR and Paul Wurth in 1981. Due to its reliability, low sulphur emissions, and limited

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Recycling Steel Remnants With SCARABAEUS® Pelletizing

2020-9-22  Defined particle sizes of the steelworks remants pellets are a pre-requisite for Waelz kiln optimization. Typically the pellets have a moisture content of approx. 14 wt.%. The target size of the pellets is mostly approx. 4 to 8 mm. The capacity of the SCARABAEUS® in the recycling sector is approx. 50,000 to 150,000 t/a.

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