(1. 中國(guó)地質(zhì)科學(xué)院鄭州礦產(chǎn)綜合利用研究所，鄭州 450006；
2. 國(guó)土資源部多金屬礦評(píng)價(jià)與綜合利用重點(diǎn)實(shí)驗(yàn)室，鄭州 450006；
3.東北大學(xué)資源與土木工程學(xué)院，沈陽(yáng)110089)
摘 要: 對(duì)高壓輥磨機(jī)(HPGR)產(chǎn)品和圓錐破碎機(jī)(CC)產(chǎn)品的磨礦技術(shù)效率進(jìn)行對(duì)比研究，評(píng)價(jià)不同破碎方式后的磨礦效果。相對(duì)于圓錐產(chǎn)品，輥壓產(chǎn)品個(gè)別粒級(jí)分布的“雙峰”特征更加明顯，平均粒度較小，分布更加不均勻。輥壓產(chǎn)品所需要的磨礦時(shí)間短、可磨性好。對(duì)于粒徑小于2.0mm全粒級(jí)給礦和粒徑小于0.5mm給礦，輥壓產(chǎn)品的磨礦技術(shù)效率低，降低的幅度隨著磨礦細(xì)度的增加而降低直至兩者的磨礦技術(shù)效率相當(dāng)；對(duì)于粒徑在0.5~2.0mm范圍給礦，輥壓產(chǎn)品的磨礦技術(shù)效率與圓錐產(chǎn)品的相當(dāng)甚至略高。基于此，提出一種高壓輥磨機(jī)超細(xì)碎-分級(jí)磨礦新工藝，該工藝既可大幅降低一段磨機(jī)的入磨量，又可提高磨礦技術(shù)效率，減弱整體磨礦過(guò)程中的過(guò)粉碎。
關(guān)鍵字: 高壓輥磨機(jī)；圓錐破碎機(jī)；磨礦技術(shù)效率；超細(xì)碎-分級(jí)磨礦
（1. Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,
Chinese Academy of Geological Sciences, Zhengzhou 450006, China;
2. Key Laboratory for Polymetallic Ores'' Evaluation and Utilization,
Ministry of Land and Resources, Zhengzhou 450006, China;
3. College of Resources & Civil Engineering,Northeastern University,Shenyang110089, China）
Abstract:In consideration of overgrinding in grinding process, the grinding technical efficiency (Et) of comminuted hematite products using a high-pressure grinding roller (HPGR) and a conventional cone crusher (CC) were comparatively studied. Compared with CC products, individual size distributions (ISDs) in HPGR product show a more significant “double-peak” characteristic. The results show that HPGR products are finer and have a wider full-size distribution because of the greater proportion of fines. HPGR products need a shorter grinding time and have a lower relative grindability. HPGR products have a lower Et at a decreasing rate than the CC product for feeds of <2.0 mm and <0.5mm size fractions, and then show a slightly higher Et for the feed of 0.5-2.0 mm size fraction. Based on the above research, a new process of ultra-crushing in HPGR – classified grinding is advanced. The new comminuting process is adopted to reduce ores tonnage into first stage ball mill significantly, improve grinding efficient and weaken overgrinding in the whole grinding process.
Key words: high-pressure grinding roller; cone crusher;grinding technical efficiency; ultra-crushing-classified grinding
