Comprehensive utilisation of blast furnace slag
The water quenching granulation process, also known as the wet treatment process, is a process that uses a high-pressure water stream to quickly cool the blast fur-nace slag in …
blast furnace slag rotary furnace
Comprehensive utilisation of blast furnace slag
The performance of blast furnace slag treated by wind quenching is significantly better than that of water quenching slag, and the heat recovery rate is high, …
Centrifugal-Granulation-Assisted thermal energy recovery …
The air-cooled blast furnace slag (called as ABS) is rock-like, serving as perfect material for construction aggregates. The granulated blast furnace slag (GBS) …
Granulated Blast Furnace Slag | JFE Mineral & Alloy …
Portland blast furnace slag cement is economical and environmentally friendly because it conserves resources and energy, leading to reduction in CO 2 emissions. Portland blast furnace slag cement reduces impact to the environment. By using granulated blast furnace slag, consumption of limestone, the main raw material of cement is reduced by ...
Modeling on Dry Centrifugal Granulation Process of Molten Blast Furnace …
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 ...
Rotary Furnace
Rotary furnaces are batch furnaces that generally utilize oxy-fuel burners and limit the volume of off-gases. The rotary furnace design gives high utilization of the input energy …
Low-carbon Operation Technologies and Challenges for
Taking the zinc oxide rotary kiln as an example, the leaching slag undergoes a reduction reaction in a high-temperature environment to recover zinc. The precise …
Dry Granulation of Molten Blast Furnace Slag and Heat …
Blast furnace slag (BF slag), is the main by-product in the ironmaking process, which contains large amounts of sensible heat. To recover the sensible heat, this paper described the hot ...
Waste Heat Recovery from Blast Furnace Slag by …
Blast furnace (BF) slag is the main byproduct in the ironmaking process, which contains large amounts of sensible heat: about 400 kg per ton of blast furnace iron. The temperature of BF slag is about 1,773 K, and the enthalpy is about 1,700 MJ/ ton.1 Figure 1 shows the present situation of BF slag treatment. Traditionally, BF slag was …
Hydrogen Production from Natural Gas Using Hot Blast Furnace Slag
The rotary atomizer granulates liquid slag (which typically exits the blast furnace at approximately 1500 °C) to solid particles at 1300 °C, with expected diameters ranging from 100 µm to 3 mm . The granulated slag falls into a fluidized bed and contacts methane traveling upward from the bottom.
ASPEN Plus simulation of coal integrated gasification combined blast
This article presented a model for the system of coal gasification with steam and blast furnace slag waste heat recovery by using the ASPEN Plus as the simulating and modeling tool. ... In recent years, the method of slag granulation of rotary cup atomizer (RCA) was widely used and accepted. Pickering proposed a commercial scale system …
Process and mechanism of preparing metallized blast …
In this study blast furnace ash and converter sludge were selected as the research objects, and high-quality metallized pellets were prepared based...
Refractory Corrosion Comparison Through a Rotary Drum Furnace Slag …
Six refractory corrosion resistance tests were performed in a laboratory scale rotary drum furnace (Fig. 1) using synthetic lead-free slags.The base slag composition was kept constant (26% SiO 2, 57% Fe 2 O 3, 12% CaO, 5% Al 2 O 3) and different amounts of sodium carbonate (Na 2 CO 3) or anhydrous sodium tetraborate (Na 2 B 4 O …
Redox, extraction of iron and transition metals Extracting iron
Iron is extracted from iron ore close ore A rock containing enough quantities of a mineral for extraction to be possible. in a huge container called a blast furnace. Iron ores such as haematite ...
Granulated Blastfurnace Slag
the granulated blastfurnace slag is partially dried in a rotary or in a vertical pre-drier. This material is fed at a prescribed rate into a high ... blast-furnace slag cement containing 50 wt.-% GGBS gen-erates only 0.54 t CO 2. These data include emissions from the calcination process, the fossil fuel burning, and the use
Dry Slag Granulation – The Future Way to Granulate …
Each year, approx. 400 million tons of blast furnace slag is produced worldwide with a tapping temperature of around 1,500°C. Currently, the slag is granulated in wet granulation plants using large volumes of water and to date it has not been ... process (around 1450°C) in a rotary kiln. Beside the high demand of raw materials the …
Slag-Forming in Blast Furnace Ironmaking | SpringerLink
The formation process of blast furnace slag is mainly divided into three steps: primary slag, intermediate slag, and tapped slag. (1) Primary slag. It is formed along the top edge of cohesive zone and starts to drip when flowing to the lower edge of cohesive zone. The formation of primary slag includes solid-state reaction, softening, melting ...
Preparation of Expanded Slag Ball with Blast Furnace Slag by Rotary …
Blast furnace slag is the main by-product in the iron -making process, and has a yield of 300–350 kg/t-pig iron [].It is composed of the components (quartz, clay minerals, carbonate, and apatite) in iron ore and limestone (or dolomite) solvent combination, and at 1673–1873 K temperature into a molten state.
Centrifugal-Granulation-Assisted thermal energy recovery …
Snapshots of centrifugal granulation of molten blast furnace slag by (a) rotary disc atomizer [72], (b) rotary cup atomizer [73] and (c) rotary multi-nozzle cylinder atomizer [74]. Rotary Disc Atomizer. The earliest attempt to granulate the BFS by RDA was reported by Yoshinaga et al. [53] in 1982 using the RDA of 100 mm in diameter. …
Blast Furnace Slag Cement – Manufacture, Properties and Uses.
Blast furnace slag cement is the mixture of ordinary Portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement. Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious properties.
Rotary Furnace
The slag from a rotary furnace in general contains low levels of lead (2–4%). ... It has practical applications in coal gasification, the nuclear fuel processing industry, etc. Blast furnaces are commonly used in the steel-making industry. Stirred bed reactors have a wide range of applications in the field of chemical reaction crystallization ...
Ground Granulated Blast Furnace Slag
Calculations Relating to Concrete and Masonry. Sidney M. Levy, in Construction Calculations Manual, 2012 5.4.5 Ground Granulated Blast-Furnace Slag. Although portland blast-furnace slag cement, which is made by intergrinding the granulated slag with portland cement clinker (blended cement), has been used for more than 60 years, …
Waste Heat Recovery from Blast Furnace Slag by …
To recover the sensible heat of BF slag, three key problems should be considered: (I) the dry granu-lation of BF slag without consuming water, (II) increasing …
Granulation characteristics of molten blast furnace slag …
1. Introduction. Molten blast furnace (BF) slag is one of the main by-products in the iron-making process, and has a yield of 300 kg/t-pig iron [1].The heat contained in molten BF slag (1500 °C) reaches up to 1600 MJ/t.Globally, the production of pig iron was nearly 1153 million t in 2015 [2], and about 345.6 million t of BF slag were produced.The …
Centrifugal granulation characteristics of molten blast furnace slag
Molten blast furnace (BF) slag is almost the last high-temperature liquid waste heat resource that has not been recycled in iron and steel making industry.
Waste Heat Recovery from Blast Furnace Slag by Chemical …
To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with …
Reduction of Lead-Rich Slags with Coke in the Lead Blast Furnace …
The synthetic slag composition was chosen to resemble a simplified feedstock composition of a secondary lead blast furnace, i.e. a blast furnace using secondary resources rather than ore. In particular, the emphasis is put on a furnace that uses a slag that stems from an oxidative process (such as a copper smelter) as its main …
Ground Granulated Blast-Furnace Slag: Its Chemistry …
SP = average compressive strength of slag-reference cement mortar cubes at designated ages, MPa (psi) P = average compressive strength of reference cement mortar cubes at designated ages,MPa (psi). Table 1 shows the requirements of ASTM C989 for each grade of Ground Granulated Blast-Furnace Slag. TECH BULLETIN Ground Granulated …
Feasibility Study for the System of Coal Gasification by Molten Blast …
At present, molten blast furnace slag is quenched rapidly using a large amount of water to produce a glassy-granulated slag without any recovery of its much sensible heat, polluting water and atmosphere. To solve these problems, a new heat recovery system is proposed. This system consists of melting gasifier, the 2nd gasifier …
Flow characteristics of molten blast furnace slag film on rotary …
Based on the granulation technology for high temperature molten blast furnace slag by rotary cup, visualization experiments were conducted by applying water as the substitute for slag and a rotary ...
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