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The Proportion Of Water Quenched Slag Is Generally Much

Utilisation of water quenched slag as fine aggregate in

20/11/2018· This study investigates the performance of water-quenched slag (WQS) fine aggregate in blended ground granulated blast furnace slag (GGBFS) and fly ash (FA) alkali-activated materials (AAM). Mortar samples derived from the corresponding concrete mix proportion were synthesised in this study, where river sand and WQS constituted the fine aggregate system in different proportions. Analysis of

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Water Quenching Copper Slag electricity-machinery

Water Quenching Copper Slag . 1. Distribution and application conditions of copper smelting water quenching slag : At present, the copper output in China lists the third in the world, the copper ore resources developed and utilized have been found to occupy 67.1% out of the national proven reserves, and lots of mines closes greatly, the grade of exploitation has been decreased into 0.3%一

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slag cement proportioning

The proportion of slag cement used is usually dictated by requirements for strength, durability, time of set, heat generation, or the resistance of the concrete mixture to alkali silica reaction (ASR) and sulfate attack. The range of replacement rates for various applications are shown in Table 1, though specific replacement rates will vary with the particular circumstances. Table 1 Slag

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Slag water quenching process YouTube

31/08/2017· industrial waste slag water quenching process. Local researchers develop cement from reduced metal slag ″고철찌꺼기로 시멘트 만든다& Duration:

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Further processing and granulation of slags with entrained

sudden quenching in the water granulation process traps the included alloy in the granule so that only milling of the slag can liberate such alloy. However, these processes do not result in the recovery of metals present in the slag as oxides or silicates; for example, the total Fe content of BOF slag can be 31.3% Fe2O3 while the metallic Fe content is only 2.3%. Should slags be dumped with no

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Effects of CaCO3 on slag flow properties at high

01/07/2013· Slag quenching experiment. The quenching experiment was performed in order to obtain slag sample at certain temperature. Slag with different CaCO 3 additions were placed in tube furnace. The temperature was kept according to the viscosity test procedure. When the temperature reached the target value, the slag was taken out of furnace and then quenched by water immediately. 2.5. XRD

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Materials Free Full-Text Reactivity and Hydration

Air quenched slag is processed by a fast air cooling method which is developed with the advantages of recovering heat from molten slag and water conservation compared to the water quenching method. Air quenched slags with different chemical compositions are synthesized in the lab by designing three chemical composition ratios: (CaO + MgO)/(SiO2 + Al2O3), CaO/MgO and SiO2/Al2O3, which are

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Structural and durability properties of concrete made with

Rapid cooling of slag using water quenching produces a glassy material that is slowly reactive with water. Slag is a latent hydraulic binder in that it hardens very slowly in water but is much more reactive when activated by alkalis, for example calci-um hydroxide, one of the products of Portland cement (PC) hydration. The performance of slag as a cementitious material depends on the chemistry

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Recycling and environmental issues of metallurgical slags

the slag is either quenched or slowly cooled. The BF slags are usually solidified in four different ways: solidification in slag pots or pouring pads in air forms air-cooled slag; water quenching forms granulated slag; foaming with water structures pumice slag with high porosity; blowing with air or steam forms slag wool for thermal insulation. Due to the similar chemical compositions of the

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UG-Mat Blast Furnace Slag Recycled Materials Resource

If the molten slag is cooled and solidified by rapid water quenching to a glassy state, little or no crystallization occurs. This process results in the formation of sand size (or frit-like) fragments, usually with some friable clinkerlike material. The physical structure and gradation of granulated slag depend on the chemical composition of the slag, its temperature at the time of water

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Waste slag as alternative raw material in the ALF-CEMIND

Granulated slag is formed by quenching molten slag in water to form sand-sized particles of glass. The disordered structure of this glass gives the material moderate hydraulic cementitious properties when very finely ground into granulated blast furnace slag, but if it can access free lime, the granulated blast furnace slag develops strong hydraulic cementitious properties. Pelletized or

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Backfill material QueensMineDesignWiki

Slag that is quenched rapidly forms amorphous silica, i.e., material with a high glass content. High glass content and the right chemistry are key characteristics of slag cement. The process of manufacturing slag into cement begins when molten slag is water-cooled and either pelletized or granulated. It is then ground in a ball mill and sized generally finer than GU. It should be noted that a

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NATIONAL SLAG ASSOCIATION

C595 gives the minimum percentage applicable in that particular specification. In recent years, "slag cement" has been commonly used to refer to either combinations of Portland cement and ground slag or to the ground slag alone. It is possible at times to find varying opinions as to the proper classification for the latter cement or mineral admixture. It is appropriate to establish what slag

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Denis Higgins PhD MSc BSc Cementitious Slag Makers Association

This slag is periodically tapped off as a molten liquid and if it is to be used for the manufacture of ggbs it has to be rapidly quenched in large volumes of water. The quenching optimises the cementitious properties and produces granules similar to a coarse sand. This ‘granulated’ slag is then dried and ground to a fine powder.

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SUITABILITY OF BLAST FURNACE SLAG IN CONCRETE

slag, which absorbs much of the sulfur from the charge, comprises about 20 percent by mass of iron production. The use of blast furnace slag aggregate in concrete has until recent years been confined mainly to the area adjacent to the steelworks. Over recent years blast furnace slag aggregate has begun to be used in concrete. Both blast furnace slag cement and air-cooled blast furnace slag

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Slag Cement Frequently Asked Questions(二)

Optimum slag cement percentage for maximum strength development is generally between 40 and 50 percent. A specification based on concrete strength at 28 days may be able to use less total cementitious material (portland + slag cement) than a similar plain portland mixture is mixture strength is optimized. If durability parameters are specified (e.g. permeability, sulfate resistance, alkali

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Parametric Study on Use of Pozzolanic Materials in Concrete

Ground Granulated Blastfurnace slag (GGBS) is a byproduct for manufacture of pig iron and obtained through rapid cooling by water or quenching molten slag. If slag is properly processed then it develops hydraulic property and it can effectively be used as a pozzolanic material. However, if slag is slowly air cooled then it is hydraulically inert and such crystallized slag cannot be used as

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Processes for the disposal and recovery of phossy water

27/08/1996· Molten slag 8 flows from electric furnace 7 to quenching 9. Molten slag is quenched with phossy water 1 to form granulated slag 10. Phossy water 1 is vaporized by contact with molten slag to form steam 11. Furnace gas 12, consisting mainly of carbon monoxide, phosphorus vapor and hydrogen, flows to condenser 13 wherein gas is cooled and elemental phosphorus condenses. Phosphorus

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Strength and Durability Study on Concrete with GGBS and

percentage of steel slag and study the durability of concrete mix. A. Material a) Cement Ordinary Portland cement-53 grade (Ramco Cement) have used in investigation. The cement was tested according to IS 4031:1988. It confirmed to IS 12269:1987. b) Ground Granulated Blast-furnace Slag (GGBS] Ground granulated blast-furnace slag is the granular material formed when molten iron blast furnace

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