This promotes the parallel formation of PCC and zeolites. The acetic acid-to-calcium molar ratio used in each extraction step was 2:1 (based on the mass of slag, the calcium content of the slag, and the volume of acetic acid solution), meaning that the total ratio over two extraction steps was 4:1.
This work investigated the formation of calcium silicate solids from the reaction between iron blast furnace slag and lime. Since SO 2 reactivity for calcium silicate sorbents …
The aforementioned results have shown that it is possible to activate blast furnace slag by low pH values in the pore solution in the presence of calcium hydroxide. Pure slag blended with calcium hydroxide and calcium carbonate showed mortar strengths up to 50 MPa after 28 days.
Further experiments were performed with a 5.0% dilute sulfuric acid solution used to leach a Ti-bearing blast furnace slag sample that had been calcined with concentrated sulfuric acid, at a liquid–solid …
A composite activator for ground granulated blast-furnace slag (GGBFS) and slowly cooling cinder (SCC) of power plants was explored. It does not contain chloride, or includes a small quantity...
Air-cooled slag (ABS) Used primarily as a construction aggregate, air-cooled blast furnace slag (ABS) is used as granular and general fills, for capping, surface dressing and more. View product 1 Advantages over traditional aggregates Manufacturing
This study prepared an alkali-activated soda residue (SR)-blast furnace slag (BFS) composite binder by adding a large amount of SR to the alkali-activated material system. Considering many factors, such as the Na2O content, ratio of SR to BFS and the water-binder ratio, the variation patterns in the new binder's mechanical properties and …
The main types of slags that are generated from the iron and steelmaking industries are classified as follow: (i) blast-furnace slag (ironmaking slag), (ii) steel-furnace slag, (a) basic-oxygen-furnace …
1. Calcium Extraction from Blast Furnace Slag. NOTE: Due to the detrimental effect of acidity on leaching selectivity, the extraction of calcium takes place …
Basic oxygen furnace (BOF) slag accounts for the majority of all residual materials produced during steelmaking and may typically contain certain transition metals. Vanadium, in particular, came into focus in recent years because of its potential environmental toxicity as well as its economic value. This study addresses the vanadium …
Steelmaking slag, or steel slag, is a by-product from the production of steel during the conversion of hot metal to crude steel in a basic oxygen furnace, or during the melting of scrap in an EAF. From: Sustainable and Nonconventional Construction Materials using Inorganic Bonded Fiber Composites, 2017 View all Topics Add to Mendeley
Skin: Dusts from Blast Furnace Slag, when combined with water or sweat, produce a severely irritating alkaline solution and burning of the skin. Symptoms include pain, …
Blast Furnace Slag (BFS) is a by-product of iron making with a potential to be used in different applications. In this research, BFS is used to investigate the phosphate removal ability in...
This slag consists of calcium oxide, magnesium oxide, and other metal oxides, the combination of which is similar to ... solution was used to obtain diluted metal ion …
the ladle furnace to produce different grades of steel.. The predominant compounds in steel slag are dicalcium silicate, tricalcium silicate, dicalcium ferrite, merwinite, calcium aluminate, calcium-magnesium iron oxides, some free lime and magnesia. Steel slag is mildly alkaline, with a solution pH generally in range of 8 to 10.
the remaining solution was adjusted by adding CaO and then high-purity calcium nitrate crystals were extracted using solubility differ-ence. Calcium nitrate is used in agriculture and other industries with increasing demand. EXPERIMENTAL The slag used in this study was granulated blast slag of P steel mill that had been piled up separately.
Calcium Oxide 38.0 Magnesium Oxide 11.0 Aluminum Oxide 8.0 Sulfur 1.0 Blast Furnace Slag is a nonmetallic byproduct from the production of iron. The Silicon Dioxide may contain trace amounts of crystalline silica. Slag
This study investigates the effect of replacing magnesia with granulated blast furnace slag on some physical and . ... obtain a paste to which sand was added, ... solution is a calcium oxalate ...
Blast Furnace Slag (BFS) is a by-product of iron making with a potential to be used in different applications. In this research, BFS is used to investigate the phosphate removal ability in...
Procedure Weigh a 1.000-gram sample and transfer to a 400-ml beaker, add 50 to 100 ml of water. Bring to a vigorous boil and add... Digest at a low boil until the …
slag powder and blast furnace slag so the recycling of steel slag can bring enormous benefits and environ-mental benefit to whole society.[9] 6. Ground granulated blast furnace slag is commonly used in combination with Portland cement in concrete for many applications[10,11] 7. The heat of hydration is dependent on the Portland
The iron and steel industry is an energy-intensive sector, and large amounts of waste/ by-products are generated during the steelmaking process, such as CO2, metallurgical slag, and wastewater. Enhancing the …
It uses an aqueous solution of acetic acid to dissolve blast furnace slag, followed by removal of residues and evaporation of the acid to produce acetate, which is then dissolved in water before ...
Slag was initially added to water and was allowed to settle without shaking so that the calcium and silica ions release gradually throughout the dissolution period of 1 h. The release of excess calcium ions inhibits the movement of free silica ions in the solution.
Blast furnance slag has approximately A 45% calcium oxide and about 35% silica B 50% alumina and 20% calcium oxide C 25% magnesia and 15% silica D 25% calcium sulphate and 15% alumina Solution The correct option is A 45% calcium oxide and about 35% silica Blast furnace slag composition CaO : 34-45% SiO2 : 27-38% Al2O3 : 7-12% F e2O3 : …
Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, …
In the leaching experiment, 17 g EAF slag was leached by 340 mL ammonium chloride solution (2 mol/L) at 60 °C under microwave irradiation. During the experiment, approximately 2 ml of...
Slag is generally produced in different types of furnaces working under various operating conditions and contains alumina, calcium oxide, silica and so on. Physical and chemical properties of a typical slag dictate the distinct methods of slag solidification including air cooling, steam introduction and injection of additives.
slag should produce one mole of Ca(OH) as per the reaction: Ca2+ + 2OH 4 Ca(OH) 2. Reverse osmosis (RO) concentration RO concentration was carried out using two …
Studies conducted over the past 10 years have demonstrated the technical suitability of the electric arc furnace slag as an alternative to natural stone in several applications. Steel slag can be profitably used as a road surface layer, for foundations and embankments, or for concrete aggregates. However, a strong limitation to their use is …
Electric Arc Furnace (EAF) steel slag is the basic material used to obtain good quality aggregates in different layers of road pavements. Many scientific papers have reported on the high frictional and abrasion resistance of this material. ... Electric Arc Furnace (EAF) steel slag is the basic material used to obtain good quality aggregates in ...
1 day agoThe current study aims to investigate the effect of calcium hydroxide on the geopolymer derived from an admixture of the natural mineral (kaolin) and industrial by-products (fly ash, red mud). The compressive strength and microstructure were studied using compressive strength tests, X-ray diffraction, infrared spectroscopy, BET method, …
This research article explains the effects of pH and metal composition on the selective calcium extraction from steel slag. The operating parameters including extraction solvent type, solvent concentration, metal composition of steel slag, substance type and pH …