本文選題：高壓輥磨機　切入點：磨礦動力學　出處：《中南大學學報(自然科學版)》2017年05期 　論文類型：期刊論文

【摘要】：對紫金山金銅礦石進行高壓輥磨和顎式破碎,然后對2種產(chǎn)品進行分批磨礦試驗,基于磨礦動力學原理,借助MATLAB軟件分析2種產(chǎn)品磨礦過程中各個粒級的磨礦速度,采用掃描電鏡(SEM)對產(chǎn)品表面的微裂紋進行表征,并對磨礦產(chǎn)品的分布特性進行分析。研究結果表明:在磨礦初期,微裂紋是影響磨礦速度的主要原因,微裂紋越多,磨礦速度越快,高壓輥磨產(chǎn)品的磨礦速度大于顎式破碎產(chǎn)品的磨礦速度;在粗級別(0.20~3.20 mm)中,高壓輥磨產(chǎn)品磨礦速度高于顎式破碎產(chǎn)品的磨礦速度,而且粒度越大,微裂紋數(shù)量相差越大,磨礦速度相差越大;隨著磨礦時間增加,磨機中粗粒級的質(zhì)量分數(shù)越來越小,微裂紋也越來越少,磨礦概率成為影響磨礦速度的主要原因,高壓輥磨產(chǎn)品的磨礦速度等于顎式破碎產(chǎn)品的磨礦速度;高壓輥磨碎磨工藝可以使磨礦產(chǎn)品粒度分布更加均勻,優(yōu)化粒度組成。
[Abstract]:The high pressure roller mill and jaw crushing of Zijinshan gold and copper ore were carried out, and then the batch grinding tests were carried out on the two kinds of products. Based on the grinding dynamics principle, the grinding speed of each grain level in the grinding process of the two products was analyzed with the help of MATLAB software. The microcracks on the surface of the products were characterized by SEM and the distribution characteristics of the grinding products were analyzed. The results show that the microcracks are the main factors affecting the grinding speed in the early stage of grinding, and the more the microcracks are, the more the microcracks are. The faster the grinding speed is, the faster the grinding speed of the high-pressure roller mill product is than the grinding speed of the jaw crushing product, and the higher the grinding speed of the high-pressure roller mill product is, the faster the grinding speed of the high-pressure roller mill product is than the grinding speed of the jaw crushing product, and the larger the particle size is, With the increase of grinding time, the mass fraction of coarse particles in the mill becomes smaller and smaller, and the micro-crack is less and less. The grinding probability becomes the main reason to affect the grinding speed. The grinding speed of high-pressure roller mill products is equal to that of jaw crushing products, and the high-pressure roller grinding process can make the particle size distribution of grinding products more uniform and optimize the particle size composition.
【作者單位】： 遼寧科技大學礦業(yè)工程學院;福州大學紫金礦業(yè)學院;東北大學資源與土木工程學院;
【基金】：國家自然科學基金資助項目(51374079)~~
【分類號】：TD921.4;TD95

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