發(fā)布時(shí)間：2019-04-19 07:13

【摘要】：圓錐破碎機(jī)是選礦廠的大型設(shè)備之一,它不僅在選礦中起著重要的作用,而且在冶金礦山工業(yè)和建筑建材行業(yè)中得到了廣泛的應(yīng)用。近年來(lái),隨著“多碎少磨”理論的提出和原礦量的增加,現(xiàn)有的圓錐破碎機(jī)已不能完全滿足社會(huì)生產(chǎn)的需求。因此本文對(duì)圓錐破碎機(jī)的結(jié)構(gòu)參數(shù)和性能參數(shù)進(jìn)行優(yōu)化計(jì)算,提高了圓錐破碎機(jī)的工作性能和生產(chǎn)率,改善了破碎產(chǎn)品質(zhì)量�；趯訅浩扑槔碚�,本文對(duì)圓錐破碎機(jī)的工作機(jī)理進(jìn)行了深入的研究。以散體物料運(yùn)動(dòng)學(xué)特性為依據(jù),分析了散體物料在破碎腔中三種運(yùn)動(dòng)狀態(tài),以自由落體運(yùn)動(dòng)軌跡通過(guò)破碎腔的臨界速度為前提,對(duì)破碎腔進(jìn)行了分層劃分,并利用面積法,得到了各破碎層的實(shí)際壓縮比。基于固定質(zhì)量原理,通過(guò)研究破碎腔中散體物料的運(yùn)動(dòng)軌跡和對(duì)破碎腔的分層劃分,建立了堵塞層處物料填充度與壓縮比之間的關(guān)系,改進(jìn)了圓錐破碎機(jī)生產(chǎn)率模型,提高了生產(chǎn)率模型的計(jì)算精度,并結(jié)合某型號(hào)圓錐破碎機(jī)驗(yàn)證了模型的可行性和可靠性。基于總體平衡模型,建立了選擇函數(shù)模型和破碎函數(shù)模型。通過(guò)巖石壓力機(jī)模擬層壓破碎實(shí)驗(yàn),對(duì)實(shí)驗(yàn)數(shù)據(jù)的進(jìn)行分析處理,得到了相應(yīng)的選擇函數(shù)和破碎函數(shù),實(shí)現(xiàn)了對(duì)破碎產(chǎn)品的粒度分布情況的預(yù)測(cè)和控制。本文以破碎機(jī)生產(chǎn)率為主要目標(biāo),破碎產(chǎn)品粒度分布為非線性約束條件,建立了圓錐破碎機(jī)多目標(biāo)優(yōu)化模型。研究了四個(gè)設(shè)計(jì)變量對(duì)生產(chǎn)率和破碎產(chǎn)品粒度分布的影響,通過(guò)編程優(yōu)化,在保證產(chǎn)品質(zhì)量的前提下,提高了破碎機(jī)的生產(chǎn)率。
[Abstract]:Cone crusher is one of the large equipment in concentrator. It not only plays an important role in mineral processing, but also is widely used in metallurgical mine industry and building material industry. In recent years, with the introduction of the theory of "multi-crushing and less grinding" and the increase of ore volume, the existing cone crushers can no longer fully meet the needs of social production. Therefore, the structure parameters and performance parameters of the cone crusher are optimized and calculated in this paper. The working performance and productivity of the cone crusher are improved, and the quality of the crusher is improved. Based on the theory of laminate crushing, the working mechanism of cone crusher is deeply studied in this paper. Based on the kinematic characteristics of bulk materials, three kinds of motion states of bulk materials in the crushing chamber are analyzed. On the premise of the critical velocity of the free falling body moving through the broken cavity, the broken cavities are divided into layers, and the area method is used. The actual compression ratios of each broken layer are obtained. Based on the principle of fixed mass, the relationship between material filling degree and compression ratio in the clogging layer is established by studying the movement trajectory of bulk material in the crushing chamber and the delamination of the crushing cavity, and the productivity model of the cone crusher is improved. The calculation precision of productivity model is improved, and the feasibility and reliability of the model are verified by a cone crusher. Based on the general equilibrium model, the selection function model and the breaking function model are established. Through the rock press simulation laminar crushing experiment, the experimental data are analyzed and processed, the corresponding selection function and crushing function are obtained, and the prediction and control of the particle size distribution of the broken product is realized. In this paper, the multi-objective optimization model of cone crusher is established with the productivity of crusher as the main objective and the particle size distribution of crusher as the nonlinear constraint condition. The effects of four design variables on productivity and particle size distribution of crushing products are studied. Through programming optimization, the productivity of crusher is improved on the premise of ensuring product quality.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD451

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