Slag cement is also called blast furnace cement, pbfc cement (Portland blast furnace cement). It is composed of Portland cement clinker, 20%-70% granulated blast furnace slag, and appropriate gypsum. AGICO …

The results revealed that, with increasing acidity coefficient of modified blast furnace slag during the isothermal process, the initial crystallization temperature of modified blast furnace slag ...

Apart from these, the present study proposes alkali-activation of BOF slag in replacement with ground granulated blast furnace slag (GGBFS) using sodium hydroxide (NaOH) as the activator. The fresh-state, mechanical, and microstructural properties of the alkali-activated paste samples were analyzed on 24 mixes. Test results showed that …

Blast furnace slag granulation. Cement is a global commodity, manufactured at thousands of plants. The industry is consolidating globally, but large international firms account for only 30% of the worldwide market. The principal and most visible market for cement is the construction industry in a multitude of applications where it is combined ...

Currently, blast furnaces are the primary reactors for iron-making, contributing to around 70 % of global pig-iron production annually (Zhang et al., 2021).The principle of blast furnace iron-making involves reducing iron ore into molten iron and slag through high-temperature reactions (Fig. 1 a).The molten iron and slag enter the blast …

By 1901 the manufacture of "Eisenportlandzement" containing maximum 30% of ground granulated blast-furnace slag (ggbfs) became accepted and in 1907, the first "Hochofenzement" with up to 85% ggbfs content was produced (Moranville-Regourd 1998; Smolczyk 1978 ). Ever since, ggbfs has been successfully used in cementitious …

Blast furnace is the dominant metallurgical furnace for ironmaking around the world. The blast furnace iron production was 1.18 billion tons in 2014, accounting for 99 % of global production (World Steel Association 2015).In a modern blast furnace, the fuels (coke, charcoal), iron ores (sinter, pellet, lump ores) and fluxes (CaO, MgO, CaF 2) …

2.1.1 Model assumptions. I n order to simplify the simulation, assume: (1) Ignore the wall thickness of the rotary cup; (2) The molten slag is regarded as an incompressible fluid and the v ...

1. and PAN CHEN. 1. 1.—School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. 2.—e-mail: [email protected]. Blast furnace (BF) slag, which is the main ...

One of these materials is the " blast furnace slag ". So, what happens is you reduce the amount of cement; instead of using cement, now we can use less amounts. The equation for example turns to: concrete = % of normal cement + % of blast furnace slag + water + fine aggregate + coarse aggregate + admixtures.

Ground granular blast furnace slag is a waste product of the steel production industry. It is non-hazardous, and is a finely ground powder. Similar to fly ash, GGBS falls under the category of mineral combustion wastes, and is hazardous if it contains toxic heavy metals ( Eurostat, 2013 ). Over a billion tonnes of steel is manufactured per ...

The temperature of the discharged blast furnace slag (BF slag) is between 1450 ° C and 1650 ° C, which carries a substantial amount of high-grade thermal energy and untapped resources [4, 5]. Considering that each ton of crude steel is accompanied by the production of 0.3 tons of BF slag [ 6 ], in 2019, the production of BF slag is ...

In the process of gas granulation of blast furnace slag, a cyclone separator serves to cool slag particles and separate them from hot air. This study focuses on modelling the cooling of slag particles in a cyclone separator. Simulations revealed the airflow field, temperature field and particle trajectory distribution within the cyclone …

They accordingly introduced fluorite tailings (60%) into blast furnace slag (40%) to form a parent glass ceramic with increased silica and CaF2 content which in turn resulted in better formation of diopside phase, in addition to superior mechanical and physical properties (2.41 g.cm-3 density, 0.3% open porosity and 7.36 GPa Vickers …

A considerable amount of heat energy is contained in the molten slag tapped from blast furnace.At present,the BF slag is treated by impinging much water for granulation and the energy is wasted without recovery.Thus,dry granulation technology has attracted more and more attention.The basic problems and technical difficulties of dry granulation were …

Blast furnace slag (BFS), ... [31], the technical parameters of the rotary cup diameter was 130 mm, the rotate speed of rotary cup was 1000 rpm, and the flow rate of the molten BFS was 0.5 t/h in the granular procedure. The granulation process could be seen from Supplemental Fig. S1. The BFS particles with the diameter about 1 mm was …

Blast furnace slag is a by-product of blast furnace (BF) ironmaking produce. Every pig iron production is. accompany by 0.3 ~ 0.6 tons of blast furnace slag. produced with the temperature of 1350 ...

The Sierraleone ore has high alumina content (about 7.0 mass pct) and low silica content (about 1.7 mass pct). Figure 1 clearly shows that the slag composition and volume have undergone drastic modifications compared with the other raw materials. If the high Al 2 O 3 ore is extensively used in a blast furnace (BF), great deviation will form …

Blast furnace slag (BF slag) is one of the main solid by-products in steel making with the yield of 300 kg per ton of crude steel. ... Centrifugal granulation exoerimental study of molten blast furnace slag by rotary disc. Energy Metall. Indus., 32 (4) (2013), pp. 29-32. Google Scholar [18] T. Mizuochi, T. Akiyama. Cold experiments of …

A large blast furnace has a slag content of 250–350 kg per ton of iron, and a small blast furnace has a slag content of 450–550 kg per ton of iron. The main composition range of general blast furnace slag is: calcium oxide for 35–44%, silica for 32–42%, alumina for 6–16%, and magnesium oxide for 4–12%. Blast furnace gas is …

Engineered materials designed for optimum performance in all areas of the casthouse runners – Iron Runners; Slag Runners; Skimmer Blocks; Tilting Runner; Runner Covers: Pumpable low moisture castable and shotcrete products. A range of High-Alumina & SiC based materials. Cement-free castable & shotcrete products.

Abstract. Ground granulated blast furnace slag (GGBS) is a by-product from the blast-furnaces used to make iron. Blast-furnaces are fed with controlled mixture of iron-ore, coke and limestone, and operated at a temperature of about 1,500°C. When iron-ore, coke and limestone melt in the blast furnace, two products are produced—molten …

Possible Process Flowsheet. A series of tests were performed to demonstrate a possible flowsheet to recover zinc in solution, and directly reduced lead, from lead blast furnace slags. Initially a large scale sulfuric acid leach was performed to leach 900 g of ground slag for one hour at 60 °C using 9.01 of 2M sulfuric acid.

Note 1: This guide is not intended to be used to determine the applicability of iron or steel slag, or both, for various applications. Terminology D8 designates steel slag as a product, while Terminology C125 designates blast furnace slag as a product. Its sole intent is to provide guidance as to the typical mineralogy when the iron or steel ...

Abstract: Blast furnace slag is a byproduct of iron and steel production, whose physicochemical characte ristics are influenced by the type of. production process applied. Fur thermore, its ...

The prospects of processing blast furnace and steelmaking sludge using the Waelz process in a laboratory rotary kiln, is shown. The influence of different processing temperatures, furnace ...

The slag fluidity in a blast furnace affects softening-melting behaviour in the cohesive zone, permeability in the lower part of a furnace due to liquid hold-up in the dripping zone, liquid flow in the furnace hearth, and the ability of the drainage of the slag through the tap hole. It also affects its desulphurization ability.

If the sensible heats of the reformed gas and the slag after steam reforming reactions were unrecycled, the required mass of blast furnace slag was over 30 times of bio-oil mass, while the ...

The slag composition changes as it descends in the furnace due to the absorption of the coke ash and coal ash, sulphur and silicon from the gas, and the reduction of the iron oxide. The temperature of the slag increases of the order of 500 deg C as it descends to the tuyere elevation.

Centrifugal granulation-assisted thermal energy recovery (CGATER) remains the leading technology for the iron and steel industry to enable the low-carbon treatment of high-temperature blast furnace (BF) slag. Accurate knowledge of the thermophysical properties of BF slag is pivotal for the commercialization of the CGATER.