Red iron ore is an important iron ore resources. In the early 1960s, the domestic processing of hematite was mainly carried out by roasting-magnetic separation and single-flotation processes, and the production technical indicators were poor. After continuous research and transformation, the indicators have improved. In recent years, the successful development and application of some new beneficiation processes, new magnetic separation equipment and new pharmaceuticals have made a major breakthrough in hematite beneficiation technology .
Slon vertical ring pulsation high gradient magnetic separator
Ganzhou Nonferrous Metallurgy Research Institute developed Slon pulsating high gradient magnetic separator. After more than 20 years of continuous improvement, it has good stability and good sorting properties, and is widely used in China's red ore dressing.
After the SLon-2000 vertical ring pulsation high gradient magnetic separator was used to replace the original flat ring strong magnetic separator, the grade of iron concentrate increased by 1.19 percentage points, the grade of tailings decreased by 1.56 percentage points, and the iron recovery rate was reduced. Increase by 8.19 percentage points. From 2001 to 2004, the Qidanshan Concentrator was used to control the grade of fine-grained tailings with Slon-1750 magnetic machine. The Slon-1500 magnetic machine controls the grade of the spiral chute tailings. The new process has an iron concentrate grade of over 67.50% and an iron recovery of 78%. The Donganshan Sintering Plant used the Slon-1750 vertical ring pulsation high gradient medium magnetic machine to control the grade of the spiral chute tailings, and partially toss out some coarse tailings. The circulation of the whole process was reduced from 161.56% to less than 90%.
The dense underground Concentrator Panzhihua Iron Slon-1500 vertical ring pulsating high gradient magnetic separator used in micro-fine particles of titanium ore magnetic separation - flotation process. When the TiO 2 grade of the ore is 9.23%, a concentrate containing 19.58% of TiO 2 is obtained by one magnetic separation . The recovery rate was 63.12%. In 2004, a Slon-1250 vertical ring pulsation high gradient magnetic separator was used in Fujian Shanghanghuyang Iron Mine, which achieved a good index of 63% of the comprehensive iron concentrate grade. Kunshan Iron and Steel Dahongshan Concentrator used Slon-1500 vertical ring pulsation high gradient magnetic separator to carry out a strong magnetic rough selection and two-stage strong magnetic selection. The final concentrate grade reached 64% and the recovery rate reached over 80%. Iron Man YinGou Slon-1000 using a vertical ring pulsating high gradient magnetic separator Slon-750 and a vertical ring pulsating high gradient magnetic separator composed of a coarse sweep process. The crude ore concentrate grade was 60.31%, the yield was 42.75%, and the recovery rate was 51.40%. The grade of sweep concentrate was 55.17%, the yield was 19.24%, and the recovery rate was 29.36%. From 1989 to 2001, the Mashan Iron and Steel Mine of Mengang Iron and Steel Co., Ltd. carried out a strong magnetic separation transformation of the original process. After a grinding process, three Slon-1750 magnetic separators were used for rough selection and tailing, and the coarse concentrate was used for two-stage grinding, and then three sets were used. The Slon-1750 magnetic separator is selected, and the tailings of the selected operations are scanned by the SLon-1500 magnetic separator. Compared with the original one-stage grinding re-election process, the magnetic separation process iron concentrate grade is 4.57 percentage points higher and the recovery rate is 14.88 percentage points higher. In order to solve the shortcomings of high sulfur and phosphorus in the products, Meishan Iron Mine uses a weak magnetic separator to recover magnetite, and 16 Slon-1500 magnetic separators are used to recover hematite and siderite in minerals. The operation recovery rate of this process iron is 81.64%, the sulfur content is 0.464%, the phosphorus content is 0.327%, the sulfur removal rate is 57.28%, and the phosphorus removal rate is 69.13%.
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