The recovery of steel slag from the solid pyrolysis products of oil sludge containing steel slag was conducted in a magnetic separator, and the maximum recovery rate could reach 55.03%. Therefore, pyrolysis would be a promising and practicable method for waste steel tailings to achieve all resource recovery as well as zero emissions.
The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and a single magnetic separation time of 1 min. The steel slag concentrate rate is 30.54% …
Magnetic separation removes the residual metallic Fe and Fe oxides from the steel slag. MA and geopolymerization widen the typical application windows of SS utilization. MA makes the BOF slag more acceptable to blended cement applications, whereas the geopolymerization process yields green construction materials.
The magnetic separation method is used for separating metallic iron and iron minerals from steel slag. Commonly used magnetic machines are the cross-belt …
The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and a single magnetic separation time of ...
To approach circular economy by enhancing the internal recycling potential of BOF-slag, an innovative pre-treatment process for the dry magnetic separation is investigated. It consists of slow-cooling to enlarge the slag crystals, followed by microwave irradiation to generate intergranular cracks to enhance the mineral liberation during …
Steel making slag is produced from basic oxygen furnace (BOF steel slag) and electric arc furnace (EAF steel slag) in the steel making process. They comprise about 10–15% by weight of the steel output (Proctor et al., 2000). Each year a great amount of steel slag is produced in different countries (Table 1) (Shen and Forsberg, 2003).
Nickel recovery from SS has been studied with magnetic separation. During this process, both hand-magnet and dry high-intensity magnetic separation is used. ... Optimization of magnetic separation process for iron recovery from steel slag. J. Iron Steel Res. Int., 24 (2017), pp. 165-170, 10.1016/s1006-706x(17)30023-7. View PDF View …
Steel slag shows use as a material (when spread over acidic soils to help to raise the pH to a more neutral level) and to enhance the physical properties of soft soils. ... The magnetic separation process and the crushing process are often repeated several times to increase the amount and quality of metallic iron that can be recovered ...
Magnetic separation is an effective method to recover iron from steel slag. However, the ultra-fine tailings generated from steel slag become a new issue for utilization. The dry separation processes …
In 2006, 10-15 million metric tons of steel slag were generated in the U.S. Out of the total steel slag produced in the U.S. every year, about 50-70% is used as aggregate for road and pavement ...
High gradient magnetic separation was used to separate the P-bearing di-calcium silicate from the iron- and manganese-bearing minerals. Wang et al. (2012) have reported that, the cooling manner is important for slag treatment. According to them, the higher recovery yield of the iron from steel slag is obtained on the slag slowly cooled.
Long et al. (2015) used reduction roasting and magnetic separation technology to treat chromium slag. In the process of reduction roasting, additives Al 2 O 3 and CaF 2 were used to destroy the structure of magnesium ferrite and improve the grade and recovery of Fe. The final product chromium-iron powder contains 72.54% Fe and …
Steel slag is a large amount of residual material produced in the process of steel manufacturing. With the requirements of sustainable development in China, the utilization of steel slag has become a hot issue. Through an in-depth study on steel slag, it is apparent that it has been widely used in various fields in recent years. The resource …
Magnetic separation of steel slag. During the integration process of oil sludge pyrolysis with steel slag reduction, the yield of pyrolysis tar reached a maximum of 10.63% at 550 °C. So, the magnetic separation of steel slag was investigated at 550 °C. As is well known, steel slag had a poor reduction effect at low temperatures.
1. Introduction. Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, …
The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and a …
The slaking of free calcium and magnesia in the slag is rapidly completed. The formed BSSF granulated slag is small in size and stable in quality, the slag and steel can be effectively directly separated by magnetic separation. Figure 4 demonstrates the flow chart of the BSSF process . The molten slag from the steelmaking plant is …
The high temperature insulation allows the steel slag to be fully melted and uniformly mixed, and the slow cooling process applied to the slag provides enough time to grow for RO phase. The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and ...
Optimization of magnetic separation process for iron recovery from steel slag. Journal of Iron and Steel Resear ch, Int ern ational 21 (2017) 165-170. Sclencefnrcct Contents lists …
The most suitable magnetic field intensity is 75 mT, the magnetic material yield is 46.00%, the iron grade is 29.10%, and the iron recovery is 64.12%. Compared with the initial steel slag, the ...
Steel slag is a solid waste of the steel industry, produced during steel production. Three types of slag, namely electric arc furnace (EAF), basic oxygen furnace (BOF), and Linz-Donawitz processed slag (LD-slag) are the steel industry byproducts. That slag comprises precious elements including zinc (Zn), chromium (Cr), iron (Fe), nickel …
In addition, it enhances competitiveness by incorporating negative pressure suction. Primary magnetic separation tests on a steel slag fine powder material …
The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and a single magnetic separation time of 1 min. The steel slag concentrate rate is 30.54% and the T.Fe content is 54.10%.
The present study provides an electrocoagulation process for the remediation of phosphate-contaminated water using aluminium, aluminium alloy and mild steel as the anodes and stainless steel as the cathode. ... Steel slag; Magnetic separation; Adsorption; Isotherm 1. Introduction [1]. In order to meet effluent quality standards, …
steel and conversion process. ... [13][14] [15] have also shown the potential of magnetic separation for slag recycling. Magnetic separation is a high-efficiency, low-cost, and selective technique ...
The process of slag re-resourcing, which included magnetic sorting, precise reduction, magnetic separation, and removal of free calcium oxide (f-CaO), was proposed to obtain iron-rich magnetic materials and cement adulterant materials. Through this process, 33 kg iron particles, 150 kg iron-rich material and 700 kg cement could be …
The synergistic disposal of oil sludge and steel slag was investigated in a self-designed continuous pyrolysis-magnetic (CPM) separation process. On the basis of experiments, the following conclusions can be drawn: The TG-MS results indicated that the addition of steel slag promoted the release of volatiles and the rate of weight loss.
Abstract. To improve the efficiency of iron recovery from steel slag and reduce the wear-and-tear on facilities, a new method was proposed by adding a secondary screen sizer to the magnetic separation process according to grain size distribution of magnetic iron (M-Fe) in the slag. The final recycling efficiency was evaluated by …
It is also an important ingredient in protective coatings, especially for stainless steel. Chromium slag is the waste residue generated by the industrial process of extracting chromium (Cr) from chromite ore. ... For the magnetic separation process, when the pre-reduction temperature increased from 1373 K to 1523 K, the average …