iron separator machine
PTMS MAGNETIC SEPARATOR
what is magnetic separation ？
The dry magnetic separation of high sulfur fine coal is carried out by using a new permanent magnet separator. Samples were analyzed using a vibrating sample magnetometer and an X-ray diffractometer to determine the properties of pulverized coal of different sizes. It was found that with the particle size less than 0.9 mm, the magnetic susceptibility and ash and sulfur content increased; the coal with a particle size of 0.15 to 0.074 mm obtained 44% sulfur reduction and 43% ash reduction, while the clean coal yield reached 95.61%. The results show that the desulfurization efficiency and deashing efficiency decrease from 53% to 37% and 49% to 32% with the increase of the particle size of the pulverized coal. The permanent magnet magnetic dry magnetic separation technology uses a new type of permanent magnet to significantly improve the desulfurization efficiency and deashing efficiency of fine coal. However, it was found that the reduction in desulfurization efficiency and deashing efficiency of coal samples of different particle sizes was associated with a decrease in the yield of clean coal, except for the coal fraction of 0.0-0.074 mm.
Due to the lack of oil and natural gas resources, China's energy production relies mainly on coal. As a result, coal combustion contributes to 85% of SO2CO, 90% of NOx, 70% of NOx, and 61% of dust emissions in China. In 2007, China's total SO 2 emissions were 2,4681,000 tons, far exceeding the environment (about 16.2 million tons of SO's payload 2). The annual economic loss caused by SO 2 emissions is about ¥1,10 billion. Pre-combustion desulfurization and deashing are ideal physical treatment methods that can eliminate SO 2 air pollution by utilizing the distribution of sulfur in coal produced in China and the availability of pre-combustion milling technology. This is because the coal is released from ash and sulfur minerals prior to combustion and can then be further separated by magnetic separation. In particular, the dry magnetic separation technology of pulverized coal can fully meet this requirement. The basic principle of magnetic separation of coal is to exploit the magnetic difference between the coal matrix and the mineral. The research of high-gradient magnetic separation desulfurization and deashing technology started in the 1970s was concentrated in a few western developed countries, and these studies mainly focused on wet magnetic separation. Due to the complexity of the wet magnetic separation separation process and the complexity of the dewatering system, it has been found that the dry separation effect before combustion is better. Thus, dry magnetic separation desulfurization was later developed. China's coal magnetic separation desulfurization research began in 1989. For example, research on continuous wet magnetic separation desulfurization of coal slurry. However, subsequent studies were limited due to high operating costs and poor results. The main reason for the fever reduction is the lack of research on the magnetic properties of pyrite and the rational design of coal mine magnetic separation equipment. Most of the current research involves wet electromagnetic devices. A recent study from Turkey reported that a permanent magnet roller magnetic separator was used to treat low-level magnetic separation of semi-coke brown coal, while another study used a permanent magnet magnetic separator to remove ash, sulfur minerals and Trace heavy metal elements. However, there are few studies on high gradient permanent magnet dry magnetic separation. Therefore, this study characterized high sulfur fine coal to determine the quality characteristics of high sulfur fine coal. The dry separation was then carried out using a self-made permanent magnet separator.
