發(fā)布時間：2018-08-29 12:15

【摘要】：逆流永磁濕式磁選機是目前重介質選煤廠最主要的介質回收設備,因其結構簡單、生產效率高、介質回收率高等顯著優(yōu)點,已經(jīng)得到廣泛的應用。然而,當前介質耗損仍然是重介質選煤廠最嚴重的問題之一,重介質選煤廠存在最主要的問題仍是磁性介質損耗,給生產和經(jīng)濟帶來了很大負擔。目前對于提高逆流永磁濕式磁選機分選效果的研究,主要為技術和管理兩個方面,通常根據(jù)現(xiàn)場經(jīng)驗,調整生產工藝和加強生產管理,效果不明顯且推廣性不強;對于設備創(chuàng)新,理論不成熟,新型產品研發(fā)周期長,用于生產應用周期更長,且費用高。本文利用篩分、煤質分析、磁選及XRD等多項試驗組成,針對動力煤和煉焦煤,從煤質特性、入料特性、入料礦.物組成和介質特性四個方面試驗研究了影響逆流永磁濕式磁選機分選效果的規(guī)律,同時從理論上分析了該類型磁選機的磁場特性對分選效果的影響,得到了以下6方面的結論:1)煤質特性對磁選機分選性能的影響規(guī)律;2)不同粒度分布的最佳入料固體濃度范圍;3)入料粘度和入料濃度、入料粘度和入料中礦物組成之間的關系及入料粘度對磁選效果的影響;4)磁選機分選性能受入料磁性物含量的影響;5)入料礦物組成對磁選機分選性能的影響;6)介質特性對磁選效果的影響。以上對逆流永磁濕式磁選機分選效果的影響規(guī)律,對現(xiàn)生產運營的重介質選煤廠磁選設備降低介質消耗具有指導意義,對新型磁選設備研發(fā)有著很好的參考意義。
[Abstract]:Countercurrent permanent magnet wet magnetic separator is the most important medium recovery equipment in heavy medium coal preparation plant at present. It has been widely used because of its simple structure, high production efficiency and remarkable advantages of medium recovery. However, the medium depletion is still one of the most serious problems in the heavy medium coal preparation plant. The main problem in the heavy medium coal preparation plant is still the magnetic medium loss, which brings a great burden to the production and economy. At present, the research on improving the separation effect of countercurrent permanent magnet wet magnetic separator mainly includes two aspects: technology and management. Usually, according to the field experience, the production process is adjusted and the production management is strengthened, the effect is not obvious and the popularization is not strong. For equipment innovation, the theory is immature, the research and development cycle of new products is long, the production and application period is longer, and the cost is high. In this paper, screening, coal quality analysis, magnetic separation and XRD are used to test the coal and coking coal. In this paper, four aspects of material composition and medium characteristics are tested to study the effect of countercurrent permanent magnet wet magnetic separator on the separation effect, and the influence of magnetic field characteristics of this type of magnetic separator on the separation effect is analyzed theoretically. The following six conclusions are obtained: (1) the influence of coal quality characteristics on the separation performance of magnetic separator (2) the optimum solid concentration range of different particle size distribution (3) the feed viscosity and feed concentration, Relationship between feed viscosity and mineral composition in feed and influence of feed viscosity on magnetic separation performance of magnetic separator 5) influence of feed mineral composition on separation performance of magnetic separator The influence of the characteristics on the magnetic separation effect. The above influence law on the separation effect of countercurrent permanent magnet wet magnetic separator has a guiding significance for reducing the medium consumption of the magnetic separation equipment of the heavy medium coal preparation plant which is now in operation and has a good reference significance for the research and development of the new magnetic separation equipment.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD94;TD457

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本文編號：2211178