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 ...

Grinding-related parameters of blast furnace slag cements (BFC), such as Bond grindability, specific rate of breakage and breakage distributions were determined employing separate and intergrinding modes. Strength tests were performed on mortar specimens made by BFC prepared by these modes of grinding to the same fineness. …

PDF / ePub. More. Abstract. It is imperative to reduce the pollution and energy consumption in the blast furnace ironmaking process. High pellets operation is …

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 …

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 …

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.

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 ...

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.

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.

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 ...

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 …

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 …

A study of intergrinding and separate grinding of . Since the first discovery of cementitious properties of blast furnace slag (BFS) by Emil Langen in 1862 and particularly after the oil crisis in 1970s, manufacture of blast furnace slag cement (BFC) has substantially increased due to greater emphasis on energy conservation, utilization of …

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.

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 …

EAF process energy dynamics, are mostly related to of f-gases, slag, dust, furnace cooling, electrical and radiative losses. Most of these energy losses are closely linked to the total process ...

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 …

Efficiency of wet-grinding on the mechano-chemical activation of granulated blast furnace slag (GBFS) ... It is estimated that cement industry releases approximately 5–7% of CO 2 globally and consumes 3% of total energy consumption worldwide [1], [2], and therefore, it is crucial to use supplementary cementitious materials (such as GBFS …

VRMs have been gaining popularity in new projects as energy consumption can be up to 40 per cent less than that of ball mills, 6 in addition to allowing materials with a higher moisture content than competing grinding systems. Many advances in VRM technology have been made for clinker and slag grinding as well as for the production of pozzolanic …

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.

It is well known that there are huge energy consumption, gas emission, and natural resource consumption in cement industry [3], [4]. Cement clinker is produced by the calcination of clay and limestone at about 1450 °C. ... Self-hydration characteristics of ground granulated blast-furnace slag (GGBFS) by wet-grinding treatment. Construct. …

The results also showed that the compressive strength and activity index of blast furnace slag increased significantly after extending the grinding time from 0-40 minutes (corresponding to ...

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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 …

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 …

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 …

Fine grinding, to P80 sizes as low as 7 μm, is becoming increasingly important as mines treat ores with smaller liberation sizes. This grinding is typically done using stirred mills such as the Isamill or Stirred Media Detritor. While fine grinding consumes less energy than primary grinding, it can still account for a substantial part of …

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, …

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, …