Of ferrous metals generally have poor resources, fine, miscellaneous features, in order to improve the utilization efficiency of black colored metal ores, in recent years, researchers for ferrous metals such as iron, chromium, manganese recycling difficulties, a great deal of theoretical Scientific research work such as research, equipment development and process testing has greatly promoted the development of magnetic dressing technology and equipment.
Huangkuai Chun et al replaced with spiral chute separator SLon-4000, from Blast Titanium plant tailings recycling titanium, in the case of a TiO2 grade ore of 6.20%, obtained TiO2 grade of 13.22%, TiO2 recovery For 61.88% titanium coarse concentrate, the recovery rate of TiO2 is more than 50% higher than that of the spiral chute. Xiong Dahe introduced the application of SLon vertical ring pulsating high gradient magnetic separator in hematite, ilmenite, chromite and manganese ore, tungsten ore beneficiation and non-metallic ore removal and purification industry. Wu Wenhong took a hematite as the research object and used the stage grinding-strong magnetic-reverse flotation process to treat the ore. With the ore grade of 30.43%, the iron grade was 64.02% and the recovery rate was 50.96. % of the selection indicators. Liu Shuren et al. studied the red clay of 25.55% iron as the research object, and investigated the effects of different calcination temperature, roasting time, carbon powder addition amount and additive dosage on the sorting results, and obtained the best experimental conditions. . Under the experimental conditions, an iron concentrate having an iron grade of 86.35% was obtained by reduction-magnetic separation, and the recovery of iron was 87.32%. Qiu Tingsheng et al. used a Tweed iron ore containing 40.91% of TFe as the research object, and processed it by reduction roasting-stage grinding-stage magnetic separation-reverse flotation process, and finally obtained iron grade of 61.30%. The recovery rate is 80.43% iron concentrate.
Sun Wei et al. used a copper mirror iron ore with a copper grade of 0.42% and a total iron grade of 33.35% as the research object. The copper was used for rough selection, regrind, and a selective magnetic separation process. The iron grade of the final iron concentrate is 58.35% and the recovery rate is 76.72%. Yan Mingliang et al. conducted a beneficiation test on a mirror iron ore in Shaanxi, and conducted a single strong magnetic separation, single re-election and re-election + strong magnetic combined process comparison test based on the ore properties. The results show that: with a single re-election process, the fine-grained iron ore has large loss and low recovery rate, which is not suitable for the ore characteristics. A single strong magnetic separation and heavy magnetic combined process can obtain better beneficiation index. In 30.60% of cases, the grade of iron concentrate obtained is above 62%, and the recovery rate is more than 83%. Zhu Chengfeng et al. conducted a feasibility study on the re-election of a flocculated tailings containing 20.66% of TFe. The experiment finally determined that the process was a beneficiation process of stage grinding-stage magnetic separation-magnetic separation concentrate flotation, and iron was obtained. Iron concentrate with a grade of 63.50%, a yield of 9.35% and an iron recovery of more than 30%. Zhu Guoqing et al. conducted a beneficiation test on a copper-iron mine in Xinjiang. The copper flotation tailings contained 46.33% of TFe, and the magnetic separation test was carried out. Finally, an iron concentrate with an iron content of 67.12% and an iron recovery rate of 76.39% was obtained. .
Liu Changqi et al. conducted a beneficiation test on Yunnan Anyi Titanium Magnetite, using the “weak magnetic rough selection-magnetic sieve selection†process to control the grinding fineness to be -0.074mm and the content was 50%. The TFe grade in the ore. Under the conditions of 21.26% and Ti02 grade of 6.33%, the TFE and Ti02 grades were 53.89% and 13.35%, respectively, and the recoveries were 62.23% and 51.69%, respectively. Ai Nianhua conducted a grinding-weak magnetic rough selection-magnetic screen selection and two-stage grinding-weakening magnetic rough-magnetic sieve selection test for the Majing iron ore fine-grained magnetite, using dry tailing - Stage grinding - weak magnetic separation - magnetic field screening - screening and re-grinding process. When the ore contains 33.04% iron, a comprehensive iron concentrate with an iron grade of 65.24% and a recovery of 80.48% can be obtained. Zhang Yingxin and others took the weak magnetic rough concentrate concentrate, the high-frequency fine sieve sieve product and the final concentrate sample from 8 iron ore dressing plants of Wuyang Mining Co., Ltd. for laboratory magnetic sieve selection test. The results showed that weak magnetic separation After renting the concentrate or the high-frequency fine sieve, the product is separated by +0.3mm and then the magnetic sieve is used for the selection. The iron grade, the operating yield and the iron recovery rate are 66%, 82% and 94 respectively. More than % qualified iron concentrate.
Liu Hengfa et al. used a permanent magnetic drum magnetic separator to conduct a beneficiation test on Liaoning TiO2 ore containing 2.67% Ti02, and determined the crushing-coarse tailing-roughing-re-election-fine grinding-magnetic separation. The process, and finally the Ti02 grade and recovery rate of 26.04% and 54.24% of the integrated titanium concentrate. Zhang Congxiang et al. discussed a new process for recovering iron concentrate from lean ore tailings. After a geophysical magnetite tailings was recovered by a disc recycling machine, the crude concentrate grade was 18.21%, which was carried out for coarse concentrates. The "pre-selection-stage grinding-single magnetic separation" process is selected to obtain an iron concentrate with a final grade of 64.98% to 67.21%, a yield of about 20%, and a metal recovery rate of 71.5% or more.
Kyoung-oh Jang et al. conducted a roasting-strong magnetic test on a goethite in Australia. The results show that: (1) roasting can remove the moisture and some impurities in the ore sample, but it can not significantly improve the grade of iron. (2) After the treatment of the goethite by the roasting operation, the iron content in the concentrate can be significantly improved by magnetic separation. Jungah Kim et al. used a magnetization roasting-magnetic separation process to study the recovery of nickel from low-grade laterite nickel ore. The results show that the calcination temperature, magnetic separation concentration and background field strength are the main factors affecting nickel recovery, after magnetization roasting- The magnetic separation process can increase the nickel grade from 1.5% to 2.9% and the nickel recovery rate is 48%. Qiang Wang et al wet high gradient magnetic separator for recovering heavy metal ions of Au3 +, the effects of the dispersant trimethyl phosphate and pH on the separation effect, studies have shown that, as the concentration of trimethyl phosphate Increasing, the recovery rate of heavy metal ions is increased, and the recovery rate of heavy metal ions decreases as the pH value increases. S. Tripathy et al. used a dry high-gradient roll magnetic separator for the separation test of limonite. Under the optimum conditions of background magnetic field strength, magnetic roller speed and feed rate, the feed TFe grade was 35.90%. At this time, a beneficiation index with a TFe grade of 51.2% and a recovery of 97.8% was obtained.
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