The effect of cooling rate on the crystallization of perovskite in high Ti-bearing blast furnace (BF) slag was studied using confocal scanning laser microscopy (CSLM). Results showed that perovskite was the primary phase formed during the cooling of slag. On the slag surface, the growth of perovskite proceeded via the successive …
Ilmenite is an important mineral resource containing Fe and Ti, and titanium concentrate can be obtained after beneficiation. Through the preparation of titanium concentrate oxidized pellets, gas-based shaft furnace reduction experiments, and melting and separation experiments, the phase changes during the roasting process of titanium …
This work investigated the use of finely ground ACS as SCM for self-compacting concrete (SCC) production. Pastes and SCCs with GBFS, ACS in two …
The acidolysis ratio was measured to be 90.61% and 92.46% in water-cooled slag and air-cooled slag, respectively. However, the acidolysis ratio of granulated slag was only 74.72% that is 20% less ...
The technological factors required to improve the operational properties of granulated metallurgical slags demanded in the building industry have been analyzed. In order to satisfy these factors, a new technology for hydro-vacuum granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG …
The results show that the wet grinding process with PG and CS can synergistically excite the GGBS and make the compressive strength of the sample surpass that of the cement, reaching 45.6 MPa. ... The influence of air cooled blast furnace slag (ACBFS) aggregate on the concentration of sulfates in concrete's pore solution. …
The PSD curves (Figure 3) shows that 80% (by weight) of the GBF slag-A and slag-B are less than 3 mm and 0.9 mm, respectively. The ACBF slag collected from the blast furnace slag yard have coarser particle size with 16% of +65 mm, 18% of -65+40 mm, 40% of -40+20 mm, 12% of -20+10 mm and 13% of below 10 mm.
1. Introduction. One of the main goals of solid waste management is to maximize its recycling and reusing ability (Hong and Li, 2011).Blast furnace slag (BFS) is the residue and solid waste from iron–steel metallurgical industry, whose storage not only occupies a large amount of land resources but also causes environmental pollution to the …
Utilization of by-pass cement kiln dust and air-cooled blast-furnace steel slag in the production of some "green" cement products, HBRC Journal, 14:3, 408-414, DOI: 10.1016/j.hbrcj.2017.11.001
The formed liquid slag is removed from the blast furnace and can be cooled in different ways (e.g., by air-cooling, air quenching, water spraying, water quenching, etc.) [ 8 ]. The applied quenching method affects the properties of the produced BFS, especially including its crystallinity. The obtained solid material can be crushed and grinded ...
Air-cooled blast furnace slag (ACBFS) is produced by the solidification of the molten slag that forms at the top of the molten iron in a blast furnace under ambient conditions. It is reported that in 2012, 47.5% of the ACBFS was used as road base and in road surface layers, 21.1% in asphalt concrete, whereas only 13.1% of the ACBFS was …
Incorporating blast furnace slag into the composition of paving concrete can be one of the cost-effective ways to completely eliminate by-products from the pig …
احصل على air cooled blast furnace beneficiation grinding السعر WhatsApp Understanding Pulverized Coal Injection in Blast Furnace Oct 21, 2018· The injected pulverized particles (lesser than 75 microns) are rapidly heated as they enter the O2 enriched hot air blast.
A sustainable source for substituting natural aggregates in road concrete is air-cooled crushed blast furnace slag (ACBFS) [50,51]. There are research studies related to the …
About 500 Kgs sample of each type of slags were collected from four different blast furnaces. Two different slag samples (Slag-A and Slag-B) were considered from the water quenched GBF slags, and the other two were ACBF (Slag-C and Slag-D) which was a slow cooling by nature. In case of GBF, water was quenched/sprayed over the hot …
Two types of blast furnace slag such air-cooled slag and granulated slag are being generated from the steel plants. In India around 40% of this slag is produced in the form of granulated slag. The specific gravity of the slag is approximately 2.90 with its bulk density varying in the range of 1200–1300 kg/m 3.
With some concentrates these can be varied within certain limits. Pelletization process. A pelletizing plant normally has four process steps namely (i) receipt of raw materials, (ii) pretreatment, (iii) balling, …
Pelletized blast furnace slag, in contrast to air-cooled and expanded blast furnace slag, has a relatively smooth texture and rounded shape. Grinding reduces the particle size to a cement fineness for use as a hydraulic cement, which is typically less than 3500 cm 2 /g. (8)
These findings suggest that air-cooled blast furnace slag can be used as supplementary cementitious material for the production of self-compacting concrete, with …
Air-cooled blast furnace slag aggregate (ACBFSA) was chosen as coarse aggregate with 30%, 50%, and replacement by volume of regular limestone coarse aggregate in this study. Both straight and hooked fibers were used in mixtures of UHPFRC. The impact of coarse aggregates and dual fibers on the mechanical characteristics and …
This study introduces a novel activation method to manufacture alkali-activated cements (AACs) based on inactive air-cooled blast furnace slag (ACS), which is well-crystallized and hydraulically unreactive. To enhance its reactivity we developed a new mechanochemical activation procedure, analysing the effect of activation on the …
The blast furnace slags, based on their cooling method, are divided into two groups of air cooled slags and granulated slags [15]. These products have a good compatibility with bitumen and in ...
In this work, the effects of replacing the aggregates of self-compacting concrete by air-cooled blast furnace slag have been analysed. Different mixes have been manufactured by substituting the fine and coarse natural aggregates by air-cooled blast furnace slag. The fracture energy and the tensile and compressive strength have been …
When air-cooled blast furnace slag is used, the mechanical and acid attack properties are improved compared with silica sand and biomass bottom ashes because of the existence of amorphous phases ...
Abstract. In this work, the effects of replacing the aggregates of self-compacting concrete by air-cooled blast furnace slag have been analysed. Different …
According to Lewis, air-cooled blast furnace slag is an ideal material for use in base and sub-base courses. Inherent properties of the slag provide advantages in …
The present study aimed to evaluate the cementitious properties of a mechanically activated (MCA) air-cooled blast furnace slag (ACBFS) used as a …
air cooled blast furnace crushing grinding tools. case. Solidification Conditions To Reduce Porosity Of Aircooled. When 300 g of blast furnace slag was melted under a N 2 gas atmosphere in a small furnace and cooled in an air atmosphere the pores which formed were similar to those of ordinary aircooled blast furnace slag cooled at 2 Kmin …
The aim of this study is to compare the mechanical and physical properties of different geopolymer mortars made with granulated blast furnace slag as a geopolymer source material, NaOH (8 M) as the activating solution, and three different types of fine aggregates (air-cooled blast furnace slag, biomass bottom ashes, and silica sand). The …
The results showed that the optimum parameters were as follows: the grinding time was 12 hours, the granularity of blast furnace slag powders was 0.053-0.075 mm, the incorporation of blast furnace ...
In this study, the effect of air blast furnace slag (ABFS) and γ-Alumina additions on densification, crystalline phases, microstructure, mechanical and electrical properties were investigated. ABFS was added partially in replacement of γ-Alumina and/or feldspar for preparing electro-porcelain compositions. The presence of slag from 15 up to 30 mass % …