ed slag produced by rapidly cooling hot molten slag (initially at a temperature of about 1,500°C) with a jet of high-pressure water. Granulated slag is vitreous and looks sandy. It is similar in chemical composition to Portland cement and hardens when it reacts with wa-ter. Therefore, about 80% of granulated slag is used as a raw materi-
اقرأ المزيد
1. Introduction. Ground granulated blast furnace slag (denoted as slag hereafter), an industrial by-product from the steel manufacture, is mainly used as mineral admixture in civil engineering [1], but its overall utilization is relatively low compared with the increasing annual output [2].In recent years, alkali-activated materials received increased …
اقرأ المزيد
@article{Zhang2022MultifunctionalGB, title={Multifunctional granulated blast furnace slag-based inorganic membrane for highly efficient separation of oil and dye from wastewater}, author={Feng Zhang and Yao Jun Zhang and Panyang He and Hao Chen and Jiangyu Gao and Jiale Liang}, journal={Process Safety and Environmental Protection}, …
اقرأ المزيد
The fine mesh on the exterior of the drum retains the granulated slag and allows the water to filter through. The granulated slag layer at the bottom of the drum creates a self filtering effect. After de-watering the residual moisture of the granulated slag is around 10 % to 12 %. The de-watered water is cleaned, cooled and recycled. The …
اقرأ المزيد
The present study evaluates the effect of utilising granulated blast furnace slag as a partial substitution of the fine fraction of natural aggregates on various concrete parameters using the general factorial approach. Two levels of the water/cement ratio (0.45 and 0.5) and four different percentages of granulated blast furnace slag (0, 20%, 40% …
اقرأ المزيد
For preparation of geopolymer materials, metakaolin [24], granulated slag [22] and fly ash [25], [26] are used as the base material of geopolymer gel. ... this zeolite is hydrophilic and has good ability for water separation from alcohol in …
اقرأ المزيد
Electrolytic manganese residue (EMR) is added into ground granulated blastfurnace slag (GGBS) as an activator to prepare EMR–GGBS cement. The effects of chemical activation, mechanical activation, water-to-cement ratio and the curing process on the strength and setting properties of EMR–GGBS cement are investigated based on its …
اقرأ المزيد
Schematic diagram of a new technological system for hydro-vacuum granulation (HVG) of slag melts. 1—HVG unit; 2—diffusor with a replaceable nozzle …
اقرأ المزيد
Ground granulated blast furnace slag (GGBFS) is a solid waste characterized by a high reactivity with alkali solutions, which is normally used geopolymer precursor. Fiber is often used to reinforce geopolymer. However, systematic investigation on the relationship between mechanical properties and microstructure for PVA fibers …
اقرأ المزيد
The separator is distributed longitudinally along the drum to evenly distribute the feed liquid in the filter drum. The water granulated slag moves upward from the mixing blade with the rotation of the drum, so that the dehydrated residue is sent to the slag tank through the conveying tape machine. The filtered water is sent to the water slag ...
اقرأ المزيد
The granulated slag and water mix is distributed evenly over the whole length of the drum. Axial vanes inside the drum continuously lift the slag sand onto a conveyor belt for immediate evacuation. The fine mesh on the exterior of the drum retains the slag sand and allows the water to filter through. The slag
اقرأ المزيد
Efficient utilisation and recycling of industrial waste along with minimum exploitation of natural resources are major challenge towards the circular economy and sustainability of the planet. 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 …
اقرأ المزيد
Large amounts of lead slag are produced during the production of primary lead and secondary lead. Considering lead concentrate smelting as an example, a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag (Hou, 2011).At the secondary lead recycling process, for each ton of metallic lead produced, 100–350 …
اقرأ المزيد
Abstract. Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other …
اقرأ المزيد
slag flowing out of the slag trench is granulated through the slag tank, the slag and water enter the slag tank through the slag channel, the steam is discharged through the …
اقرأ المزيد
During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant …
اقرأ المزيد
Ground granulated blast-furnace slag (GGBS) is a green construction material used to produce durable concrete. The secondary pozzolanic reactions can result in reduced pore connectivity; therefore, replacing partial amount of Portland cement (PC) with GGBS can significantly reduce the risk of sulfate attack, alkali–silica reactions and …
اقرأ المزيد
1. Introduction. Metallurgical solid waste produced in the iron and steel industry and cement clinker has the same chemical compositions such as C 2 S, C 3 A and C 4 AF. By using granulated blast furnace slag and steel slag as admixtures, a series of concrete with different excellent properties such as high strength, low heat release, and …
اقرأ المزيد
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 …
اقرأ المزيد
10.2.2 Blast furnace slag. Blast furnace slag (BFS) is a by-product from iron production in blast furnaces, which are fed by a mixture of iron-ore, coke and limestone. In the process, the iron ore is reduced to iron while all remaining materials form the slag, which is tapped off as a molten liquid and cooled.
اقرأ المزيد
A small portion of blast furnace slags is converted into lightweight aggregates for use in concentre in a process known as expansion or ing. The slag is expanded using water sprays just before it is poured onto a rotating drum, and broken up to particles typically in the range of 1–10 mm, …
اقرأ المزيد
When subjected to water quenching, the molten copper slag discharged from the smelters forms amorphous granulated slag. ... Li et al. [55] developed a novel process to upgrade the Cu-slag by direct reduction-magnetic separation with the addition of Na 2 CO 3 and CaO. The thermodynamic reactions can be summarized through the following …
اقرأ المزيد
main criteria of granulated slag quality evaluation are the actual content of glassy amorphous phase, which must be at least 66.6% and a specific surface area 3750–4500 cm2/g, obtainable after milling. To achieve this indicator, the granulated slag is sub-jected to mechanical milling, predominantly up to a fraction of 0–75 μm. Studies [16,
اقرأ المزيد
Following the separation process of metal from slag, the slag that originates from water cooling is granulated into size fractions mostly less than 4.75 mm, whereas the slag that yields from air cooling is converted into size fractions of 8–20 mm (Al-Jabri, 2018). As a result, FCS with a particle diameter of less than 4.75 mm may be used to ...
اقرأ المزيد
In order to compare the performance of normal aggregate concrete (NAC) to steel slag aggregate concrete (SSC) and carbonated steel slag aggregate concrete (CSC), natural coarse aggregate and fine ...
اقرأ المزيد
This paper carried out a quantitative comparative study of the influences of different composite mineral admixtures prepared with fly ash, steel slag, and ground granulated blast furnace slag ...
اقرأ المزيد
However, their separation performance for oil/water emulsions and is very poor. In this study, (GO)-modified granulated blast furnace slag (GBFS)-based −2 ·h −1 …
اقرأ المزيد
The process consumes a large amount of water (about 1 ton of water per ton of slag is lost through evaporation) and may emit acid mist, H 2 S, and SO 2, …
اقرأ المزيد
This first process was based on water granulation of steel-laden slag, followed by separation of the metal-rich and poor (slag) streams. Safety improvements led to the use of air as a granulation medium and the elimination of water. This created a completely dry granulation (atomization) process and novel slag materials with.
اقرأ المزيد
The slag was then tapped, water-granulated, and transported to dewatering basins. ... The operational conditions and the separation between the slag and matte phases in the smelting furnace, i.e., the unit operation before the fuming furnace, determined the copper content in each batch. The total copper, iron, ...
اقرأ المزيد