本文選題：濃密機　切入點：底流　出處：《工程科學學報》2017年10期 　論文類型：期刊論文

【摘要】：為了保證濃密機在高料位下不壓耙,一般通過增設(shè)循環(huán)系統(tǒng)使料漿始終處于活化狀態(tài),降低耙架運行阻力.然而,目前循環(huán)參數(shù)對底流的影響規(guī)律不明確,造成系統(tǒng)的設(shè)計及應用缺乏科學依據(jù),為此開展了循環(huán)參數(shù)對底流的調(diào)控研究.分析循環(huán)系統(tǒng)的作用原理,將循環(huán)系統(tǒng)作用范圍劃分為兩大區(qū)域,揭示循環(huán)參數(shù)對底流的調(diào)控機制,運用微積分原理對區(qū)域內(nèi)的底流體積分數(shù)變化進行求解,最終建立濃密機底流調(diào)控數(shù)學模型.最后,利用該模型對底流循環(huán)實驗參數(shù)進行驗證.研究結(jié)果表明:開啟底流循環(huán)后,底流體積分數(shù)開始降低并最終趨于穩(wěn)定,底流體積分數(shù)差隨著循環(huán)流量及循環(huán)高度增大而增大,體積分數(shù)變化幅度為0.7%~2.2%,穩(wěn)定所需時間隨流量及高度增加而減小.該理論模型完全吻合驗證結(jié)果函數(shù),為循環(huán)系統(tǒng)的設(shè)計及運行提供理論依據(jù).
[Abstract]:In order to ensure that the thickener does not press the rake under the high material level, the slurry is always activated by adding the circulating system, and the running resistance of the rake frame is reduced. However, the influence of the circulation parameters on the bottom flow is not clear at present. Because of the lack of scientific basis for the design and application of the system, the study on the regulation and control of the circulation parameters to the bottom flow is carried out. The working principle of the circulatory system is analyzed, and the range of the circulatory system is divided into two regions. This paper reveals the regulation mechanism of circulation parameters to the bottom flow, solves the variation of the integral number of the bottom fluid in the region by using the calculus principle, and finally establishes the mathematical model of the bottom flow regulation of the thickener. Finally, the mathematical model of the bottom flow regulation of the thickener is established. The model is used to verify the experimental parameters of the bottom flow cycle. The results show that after the bottom flow cycle is opened, the integral number of the bottom fluid begins to decrease and eventually tends to stabilize, and the difference of the integral number of the bottom flow increases with the increase of the circulation flow rate and the cycle height. The change of volume fraction is 0.7 / 2.2, and the time required for stabilization decreases with the increase of flow rate and height. The theoretical model is in good agreement with the verification result function, which provides a theoretical basis for the design and operation of the circulatory system.
【作者單位】： 北京科技大學土木與環(huán)境工程學院;金屬礦山高效開采與安全教育部重點實驗室;中國黃金協(xié)會;
【分類號】：TH69

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相關(guān)期刊論文 前3條

1 王孝先;;關(guān)于濃密機耙齒曲線的討論[J];有色設(shè)備;1987年02期

2 李培鳳;底流泵小循環(huán)管線的改造[J];礦山機械;2001年04期

3 ;本院科技成果[J];工程設(shè)計與研究;1994年02期

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本文編號：1624947