While slags are generally used to remove waste in metal smelting, they can also serve other … The others are inert. A wide variety of steel slag for cement options are available to you, such as block, powder, and brick. a. Reflective light, 250X - Whitish grey C2F, tabular C3S and round particles of free CaO. Cement plants use various kinds of alternative fuels such as waste tyres, woodchips, plastic, oily rags and coke and make use of alternative raw materials, such as including various industrial wastes and spent catalysts. (Fe,Mn,Mg)O), free MgO and free CaO are the main minerals in steel-slag. 3. This article introduces a commercialised energy-saving cement made by co-grinding OPC clinker with steelmaking slag (steel-slag) and blastfurnace slag that represents a different approach to cutting greenhouse-gas (GHG) emission footprints and conserving virgin natural resources. | Showroom It can replace Portland cement in various applications and is especially suitable for projects where a low heat of hydration is required. Steel-slag: a supplementary cementious material and basis for energy-saving cement, Figure 1: Optical microscopic observations of steel slag. c. Plain light, 250X A pile of RO-phase and tabular C3S. Onetouch Above - Table 3: Industrial steel-slag cement. Granulated blast-furnace slag. | Suppliers Producing energy-saving steel-slag cement can save energy, virgin natural … In concrete, processed steel and blast furnace slag provide a sustainable alternative to primary aggregates in the production of lightweight or dense ready-mixed concrete. The medium particle size of ultrafine cement is 3-4 micrometers, with a maximum particle size of under 10 micrometers. Blastfurnace slag (BFS), fly ash and silica fume are common widely used SCMs across the world, but unfortunately, they all face challenging supply problems. Test results demonstrated that the hydration rate of OPC-CS … Whatsapp: Ms Hana Lee: +84 971 222 099, 95% Mgo Burned Magnesium Fire Brick For Iron Steel Industry, 92% 95% 97% MgO Pure Dead Burned Magnesia Block for EAF/Lime Kiln/Glass Furnace, 98% 92% Sintered and Fused Magnesite Brick Manufacturer for Cement Kiln, Magnesium Alumina Spinel Fire Brick For sale Good slag resistance and alkali salt resistance, YUFA Erosion Resistance Alumina Magnesia Castable Materials Magnesium Aluminum Spinel Grit for Steel Ladle, high quality magnesia brick for cement furnace, Construction granulated blast furnace slag / steel slag from Vietnam - Wholesale for refining slag / ggbs slag Cheap Price. It is used in the production of concrete. Blast furnace slag can also be used to make Ground Granulated Blast-furnace Slag (GGBS) which is used as a cement replacement in concrete. Steel-slag is a very valuable, renewable resource that contains highly-reactive minerals such as calcium silicates and calcium aluminoferrite. 3. Alibaba.com offers 1,255 steel slag for cement products. India: GM Iron & Steel Company Limited has published plans for the construction of a 0.4Mt/yr slag cement grinding plant in Dhenkanal, Odisha. After 100 cycles, strength increased by 1.04% and weight lost was 0.12% based on concrete made with energy-saving steel-slag cement. Zhengzhou Rongsheng Kiln Refractory Co., Ltd. Henan Sunstrike Machinery & Equipment Co., Ltd. Henan Zhengzhou Mining Machinery Co., Ltd. The steelmaking slag is composed mainly of calcium oxide (CaO) and silica (SiO2). It is estimated that 115-180Mt of steel-slag is poured out annually worldwide and in addition to this previous accumulation of the material has created mountains of steel-slag. Slag cement provides reduced heat of hydration and improved resistance to sulfate attack and alkali-silica reaction when compared to regular Portland cement. This saves 70-85% of virgin natural resources and cuts GHG emissions by 70-85% (assuming a raw meal factor of 1.54 and clinker factor of 0.90). It also minimizes any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal. Slag cement is used in concrete for virtually any construction application, either in conjunction with traditional portland cement, … About 1% of these are other metals & metal products, 1% are slag, and 1% are steel scrap. Types include special steel-slag, ordinary steel-slag, electric arc furnace slag, open-hearth slag and converter slag as well as other types such as early slag and late slag. In the United States, the first slag cement facility was built in 1982 at Bethlehem Steel’s furnace by Atlantic Cement in Sparrows Point, Maryland. These oxides are essential for achieving optimal final product compositions and are also key components of the kiln feed. Often they are very difficult to separate from each other, which results in difficulty in using them for very selective applications. Today, iron and steel slag is used in many fields where its unique characteristics can be put to effective use. All rights reserved. Most steel slag has particles below 2" in diameter and thus a crushing and screening process is required to achieve only the desired … 4. Steel-slag can be used to produce energy-saving cement by co-grinding with OPC clinker and blastfurnace slag. The test results confirm the possibility to use steel slag as the filler in the production of concrete. In such preparations OPC clinker is about 15-30%, steel-slag around 30-40% and blastfurnace slag is around 40-50%. This type of slag is sold as a raw material for cement in Japan and overseas. Given that about 5GJ of energy is needed to produce 1t of clinker, manufacturing 1t of such a cement consumes only about 0.75-1.5GJ of energy. Taobao Global It is obtained by quenching molten iron slag from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder. Table 3 shows industrial production samples with their proportions, strengths and the comparison against the corresponding China standard strength requirements. This high efficiency grouting material has excellent permeation characteristics, making it suitable for grouting fine grain soils, and for the filling of small fissures. Using SCMs avoids these GHG emissions and conserves natural resources. 浙公网安备 33010002000092号 It is recommended that steel-slag used in cement manufacturing should have an alkalinity greater than 1.8. Alipay The characteristics of steel-slag as a supplementary cementitious material are also discussed. Granulated blast-furnace slag is produced by using water to rapidly cool molten slag. Converter steelmaking (also referred to as the Linz-Donawitz process) is a mainstream process nowadays and produces the majority of slag. Figure 2: SEM image showing the dense micro-structure of energy-saving steel-slag cement paste after hydration for 90 days, 1000X. Steel slag can be an alternative in cement mineral admixture, partially as a substitute for blast furnace slag. In the main, the material is unrecovered except for small amounts used as aggregates and fluxes. Steel-slag with alkalinity greater than 1.8 is usually recommended. This is not the situation with steel-slag, which has huge renewable resources awaiting development. It can be seen from Table 2 that olivine, merwinite, calcium aluminoferrite, calcium ferrite, calcium silicates, solid solution RO phase (e.g. Products. Other properties and potential applications. Above - Table 1: Typical chemical compositions by percentage of steel-slag, ground granulated blast-furnace slag and clinker.1. Japan: Taiheiyo Cement, JFE Steel and the Global Institute for Environmental Technology are working together to develop a carbon capture and storage system. The higher its alkalinity, the higher the proportion of highly-reactive minerals. Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. The chemical composition of steelmaking slag varies with the furnace … Plain light, 250X Large C3S crystal. Portland blast furnace slag cement has the following characteristics. Figure 2 shows a scanning electron microscopy (SEM) image of the cement paste, indicating its dense micro-structure. 2. Sintered Type Ca Calcium Aluminate Slag for Steel Manufacture, calcium aluminate applications calcium aluminate cement australia, GBFS granulated blast furnace ferrous slag price !!! Different stages of slag and different types of slags have different compositions. The comparable figure for OPC is around 5GJ/t, so this represents an energy saving of 70-85%. The chemical and mineral compositions of SS and GBFS are approximating to cement, and researches indicated that SS and … A wide variety of of steel slag for cement options are available to you, such as shape, type, and application. Alibaba.com offers 1,242 of steel slag for cement products. 2. Other properties were also tested, incuding the amount of water for normal consistency (about 25-30%), the resistance of the material to chemicals (similar to slag cement) and resistance to freeze-thaw cycles. Steel slag has a great potential application in cement and concrete production, for the reason that steel slag contains hydraulic components, such as C 2 S and C 3 S. But f-CaO and f-MgO in steel slag will cause poor volume stability and RO phase with little hydration activity has relatively high content in steel slag [, , ]. | Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious … Figure 1: Optical microscopic observations of steel slag. - User Information Legal Enquiry Guide, © 1999-2020 Alibaba.com. Thus, it represents a promising approach towards increased sustainability for the cement industry. It is a recovered industrial by-product of an iron blast furnace. Introducing…CEMSlag by CEMEX - YouTube. Producing 1t of this cement only requires 0.15-0.3t of clinker, 0.3-0.4t of steel-slag and 0.4-0.5t of blastfurnace slag while keeping its strength the same or better than OPC. The production of steel slag, a byproduct of the steel refining keeps increasing rapidly and it reached 90.42 million tons in 2011 in China, but its comprehensive utilization ratio is only 22% and far less than the ratio of 65% in Europe. The application of different supplementary cementitious materials (SCM) in cement production has already been proven as the most effective way to reduce greenhouse gas (GHG) emissions from cement production by replacing the same amount of clinker. Approximately 40% of iron and steel slag products, and 60% of blast furnace slag, are used in cement. Inquiry Slag cement is a hydraulic cement formed when granulated blast furnace slag (GGBFS) is ground to suitable fineness and is used to replace a portion of portland cement. | Country Search Intellectual Property Protection Songhe Industrial also cooperates with China Bank, SINOSURE to offer full service and to achieve diverse cooperation with customers all over the world. Iron and steel slag. Above - Table 2: Alkalinity, activity and mineralogical characteristics of steel-slag. Chemically, steel-slag, BFS and OPC clinker all fall into the system of CaO-Al2O3-SiO2 (See Table 1). Focusing on Southeast Asia, Africa and South America market, Songhe Industrial plans to set up 12 overseas agencies for a better and faster response to customers. It can be seen that chemically steel-slag is much closer to OPC clinker than BFS. Portland cement CEM I 42.5N and alkali activated hybrid cement H-CEMENT were used as the binder. GGBFS or Ground Granulated Blast Furnace Slag is formed when GBFS is further processed or ground using conventional cement clinker grinding technology. 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Steel slag, the most commonly discharged metallurgical slag from the steel industry, contains CaO, SiO 2, and Fe 2 O 3 in percentages that allow its use as a raw material in the cement industry. Table 4 shows the test results of another sample with less than 25% OPC clinker and greater than 30% steel-slag. b. 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. Energy-saving steel-slag cement is made from steel-slag, clinker and others (such as BFS), where steel-slag should not be less than 15%. A steel slag cement manufactured by reducing a steel slag discharged from a steelmaking furnace such as a converter, an open-hearth furnace or an electric arc furnace, and then oxidizing the steel slag thus reduced, which consists of, in weight percentage: CaO : 68 to 72%, SiO 2 : 22 to 26%, Al 2 O 3 : 1 to 3%, Fe 2 O 3 : 0.2 … 1688.com Figure 1: Optical microscopic observations of steel slag. Slag cement, a byproduct of steel-making, enhances the traditional concrete benefits of strength and durability while offering reductions in waste, energy use and greenhouse gas emissions. The dormant period of cement-steel slag complex binder during the hydration is longer than that of cement. Low hydration … 1. As a reliable supplier, Songhe Industrial established long term relations with clients by its flexible payment scheme, competitive price and professional supporting service. The cement uses only 15-30% of OPC clinker, 30-40% of steel-slag and 40-50% of blastfurnace slag (BFS), allowing for great reductions in GHG emissions, consumption of virgin natural resources and energy use by between 70% and 85%. Privacy Policy 浙B2-20120091. (1) It has high resistance to seawater and to chemicals, and can … - Producing energy-saving steel-slag cement can save energy, virgin natural resources and cut GHG emissions by around 70-85%. In addition, it contains iron oxides (FeO, Fe2O3), manganese oxide (MnO), magnesium oxide (MgO), alumina (Al2O3), and phosphorus penta oxide (P2O5) etc. Since that time, there have been over a dozen slag granulation and grinding facilities built in the United States. Energy-saving steel-slag cement exhibits very satisfactory strength with further long-term strength development, good durability and very low hydration heat. Producing 1t of clinker emits about 1t of GHG. The present invention allows steel slag to be added to the kiln feed as a separate component at the feed-end of the rotary cement kiln in various particle sizes to a maximum of 2" in diameter. Pelletized and granulated BFS are both water-cooled slags that can be ground and used to make slag cement. Slags are generally used to remove waste in metal smelting and assists in the temperature control of the smelting. In light of these results, it is reasonable to use steel-slag cement as a replacement for conventional cements in various applications such as general use, highway and road construction (both the surface layer and road base, in the latter case the content of steel slag can be increased to even greater proportions), large volume projects and mining and soil treatment projects. As a result of growing environmental awareness, iron and steel slag is highly regarded as a recycled material that can reduce impacts on the environment due to its resource-conservation and energy-saving effects. Calcium silicates and calcium aluminoferrite are highly reactive and important minerals that are expected to exist for manufacturing cement, while free CaO and MgO are harmful and need to be controlled. Two slags were used to replace cement at a replacement ratio of 15% (CS15 and SS15) and 30% (CS30 and SS30), respectively, by binder weight. Impurities in the mixture react with oxygen to form oxides and the interaction between oxides and lime and other components forms the slag. - Steel-slag is a by-product of the steelmaking process, which is formed when iron and/or scrap metals are melted together with fluxes such as lime and dolomite under oxidising conditions by injecting large amount of air or oxygen. 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