Keywords: Basic Oxygen Furnace Slag (BOF); energy consumption; global warming potential (GWP); life cycle assessment; rainy interference condition; production efficiency 1. Introduction Road construction has an adverse effect on climate change. It accounts for around 28% of global energy consumption and approximately 22% of global equivalent …

Blast furnace slag is a nonmetallic byproduct of the manufacture of pig iron in a blast furnace. BFS consists primarily of silicates, aluminosilicates, and calcium-alumina-silicates. BFS forms when slagging agents (e.g., iron ore, coke ash, and limestone) are added to the iron ore to remove impurities.

1.4.2. The basic oxygen furnace (BOF) The BOF process forms part of the primary steel production route, which also incorporates the BF process. In a BF, the iron ore, limestone and fuel are continuously supplied through the top section of the furnace, while heated air is forced into the lower section (Geerdes, Toxopeus, & Van der fliet, 2009).The end …

energy requirements:1. ball mill: 38kWh/t. HPGR plus ball mill: 30-34kWh/t. VRM: 28-32kWh/t. Grinding is a very energy intensive process that accounts for a significant amount of production costs.7 This is why advances in classifier technology have been vital in …

S.Yasipourtehrani, V. Strezov, S. Bliznyukov, T. Evans, Investigation of thermal properties of blast furnace slag to improve process energy efficiency, Journal of Cleaner Production, 149 (2017) 137-145. [25] R. Dippenaar, Industrial uses of slag (the use and re-use of iron and steelmaking slags), Ironmaking & Steelmaking, 32 (2005) …

Jan 2005. ZKG INT. Joe Harder. Request PDF | Granulated blastfurnace slag grinding with Loesche mills | Resource protection, energy savings and CO2 emission reduction …

This mode of grinding has advantages such as lower specific energy consumption, ease of manufacture, higher addition of slag, and higher flexibility in product quality arrangements [5]. When separate grinding is practiced, a question must be asked, "Which fineness the components should be ground to compensate for the lower reactivity …

This paper investigates the viability of industrial crude glycerol (C-GLY) as grinding aids of the granulated blast furnace slag (GBFS). The effects of C-GLY on the particle characteristics and hydration activity of GBFS are studied. The results show that C-GLY can effectively optimize the particle characteristics of ground GBFS.

The slag would be sorted and dried, then sent to a grinding mill. From there, it would be stored in silos. The finished product would be trucked offsite for use, according to EGLE's project ...

The specific energy consumption of grinding for such three different slag powders as water-quenching blast furnace (W-BF) slag, water-spraying basic oxygen …

The main types of slag produced in the iron and steel industry are blast furnace slag (iron smelting slag) and steel slag, with the latter including basic oxygen ... and grinding, which increases cost and energy consumption. By utilizing steel slag as industrial solid waste, these processes can be eliminated while high-value-added …

The energy consumption of the total grinding plant can be reduced by 20–30 % for cement clinker and 30–40 % for other raw materials. The overall grinding circuit efficiency and stability are improved. The maintenance cost of the ball mill is reduced as the lifetime of grinding media and partition grates is extended. 2.5.

The wet-grinding specimens presented a higher hydration heat than that of raw steel slag specimens, and the microstructure of 3 μm-40% (3 μm steel slag mixed with cement as a dosage of 40%) is ...

The objective of this study was to assess the feasibility of utilization of grinding aids (GA) in the granulated blast furnace slag (GBFS) powder production. The GBFS powders were prepared with different GA, and their grindabilities, fluidities, reactivities and hydration characteristics were investigated. The experimental results …

The total slag production of a blast furnace gives an accurate and relevant measure of the raw materials quality and is the main variable on which plant operators have no control. ... sinter plant to prepare iron ores for blast furnace, coal grinding for direct injection into the blast furnace, blowers and stoves to generate hot wind for the ...

The goals of slag recycling efforts are both environmental and economic. Reprocessed slag can replace other more costly ingredients used to make building materials. Recycling slag minimizes waste and disposal costs, reduces energy use, extends furnace life, and lowers the amount of additives needed to make slag.

The TYNA method also solves the problem that water quenching slag is easy to explode, compared with the INBA method, the circulating water consumption is …

1. Introduction. Steel slag is a common by-product of the steelmaking industry, and its output is about 10% to 15% of steel production in the world [1,2,3].As a major type of steel slag, basic oxygen furnace (BOF) slag has strong alkalinity, rich angularity, tough surface characteristics and relatively good mechanical properties …

Blast furnace slag It is a co-product generated during conversion of iron ore to pig iron (iron-making) ... Further, the hardness of steel slags leads to requirement of increased grinding energy. Steel slag also exhibits poor volume stability due to the presence of free lime. These properties of steel slags limit its use in construction ...

Results demonstrated reduced vibration and energy use versus manual control. Validation confirmed improved accuracy in predicting mill responses. ... encompassing but not limited to the vertical roller mill employed for blast furnace slag grinding. The comprehensive architecture of the system can be visualised in Figure 4, …

Slags are byproducts of the metallurgical industry. It is of importance to recycle materials and recover heat from metallurgical slags to reduce the energy consumption and environmental impact of steel industry. China is the largest iron- and steelmaking slag producer in the world, and intensive efforts have been made during last …

The shrinkage of 3 μm-40% and 3 μm-50% is 48% and 35% of cement respectively. The addition of wet-grinding steel slag can significantly reduce the shrinkage of cement, and this trend is more significant with the increase of the dosage. 3.9. Energy consumption and carbon emission

Vertical roller mills are the mills traditionally used for processing granulated blastfurnace slag and for grinding composite cements. From the energy aspect they are superior to grinding plant ...

Granulated blast furnace slag having the composition within the following ranges generally meets the requirements for its use in making blast furnace slag cement. It should contain less than 1.0% Fe 2 O 3 and 1%–3% Na 2 O + K 2 O. Some uncertainty was raised in the past concerning the mobilization of sulphur present as sulphide in the slag, its …

Because of the poor grindability of slag, a high requirement is placed on the fineness of the product. Therefore, the power consumption associated with grinding becomes the most important factor in the cost control of ground granulated blast furnace slag production and reflects the level of slag powder production technology [13], [14], [15].

Making full use of the high-efficiency grinding mechanism of the roller press, these systems have high grinding efficiency, and their energy consumptions are lower than that of the ball mill grinding systems. The unit power consumption of this process is about 50~60kWh/t per grinding slag with a specific surface area of 450m 2 /kg. However, the ...

High-temperature waste heat from the iron and steel industry, as shown in Fig. 1, are mainly stored in products, molten slag and waste gas [2].Molten slag, as a kind of by-product during the steelmaking process, is exhausted in extremely high temperature and thus, it carries a great deal of high-grade heat accounting for 10% of waste energy …

Thereby, the reactivity of solid waste particles was improved effectively at a low energy consumption level. Wet grinding was verified to be an efficient method to elevate the pozzolanic activity for fly ash [43], [46], blast furnace slag [47], [48], [49] and steel slag [50]. So, there is great potentiality for BFFS to be used as SCM in high ...

The slag grinding plant in Nanchang is in operation since November 2005. The roller mill is a type RMS-51/26 with an SEPOL RMS-435 separator. For a feed material consisting of 95% slag, 4% gypsum and 1% limestone a capacity of 80t/h finish product with a fineness of 4400cm 2 /g according to Blaine was warranted.

To ensure rational energy consumption and preserve the key properties of the material, a two-stage method was proposed, comprising preliminary grinding of blast furnace granulated slag and subsequent air classification. The proposed solution helps obtain different fractions of the material under study without having to introduce a …

To clarify the influence factors and optimization direction of energy consumption of EAF steelmaking, ... Mathy Cet al. Dynamic control of EAF burners and injectors for carbon and oxygen for improved and reproducible furnace operation and slag ing, EUR 23920. Brussels. 2007. Google Scholar.

Bond's Work Index and power draw calculations for ironmaking slag. Table 1 shows results of work indices calculated for the slag with assumed work in-dices of 24.9 kWh/t and 13.8 kWh/t values. The reason is due to these extremes being the typical values for blast furnace ironmaking slag grindability. The highest calculated work

The process was compared to the traditional electric furnace process of slag cleaning, there was reduced the energy consumption and heat loss, and also harmful gas emissions such as SO2 and CO2 ...

Blast furnace slag is a by-product of the iron-making process while producing pig iron. The present research provides an understanding of the two different types of slags of water quenched granulated slag and air-cooled slag that are generated from iron making process through the blast furnace route. The chemical, mineralogical, …

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Weak base Alkali-activated materials (AAM) is a potential approach to further reduce energy consumption and eco-friendly. Long setting time and low early …