本文選題：釩鈦磁鐵礦 + 一段沉砂　； 參考：《昆明理工大學(xué)》2015年碩士論文

【摘要】：釩鈦磁鐵礦是一種以鐵、釩、鈦為主,伴生多種有價(jià)元素(如鉻、鈷、鎳、銅、鈧、稼和鉑族元素等)的多元共生復(fù)合鐵礦,具有很高的綜合利用價(jià)值。但是,隨著礦產(chǎn)資源不斷被開采,礦產(chǎn)資源越來(lái)越“貧、細(xì)、雜”化,釩鈦磁鐵礦的入選品位越來(lái)越低,預(yù)先拋尾的研究愈發(fā)顯得重要。本文以攀鋼集團(tuán)礦業(yè)有限公司現(xiàn)有工藝流程和供礦條件為基礎(chǔ),以沉砂拋尾工藝的工業(yè)化應(yīng)用為目標(biāo),優(yōu)化相關(guān)技術(shù)設(shè)備；以一段旋流器分級(jí)沉砂的工藝礦物學(xué)研究為切入點(diǎn),分別進(jìn)行了沉砂工藝礦物學(xué)研究,磁選拋尾實(shí)驗(yàn)室試驗(yàn),并在實(shí)驗(yàn)室研究基礎(chǔ)上,進(jìn)行了工業(yè)化試驗(yàn)研究。通過(guò)對(duì)一段磨選的原礦、尾礦及旋流器分級(jí)沉砂的化學(xué)多元素分析、粒度組成測(cè)定及單體解離度分析,結(jié)果表明：沉砂主要由鈦磁鐵礦、鈦鐵礦、硫化物和脈石等四大類組成,從拋尾的角度把鈦鐵礦、硫化物、脈石一起視為綜合脈石礦物,綜合脈石礦物含量約占45%,單體解離度很高。在工藝礦物學(xué)研究的基礎(chǔ)上進(jìn)行了實(shí)驗(yàn)室試驗(yàn),在場(chǎng)強(qiáng)0.2T時(shí),沉砂磁選拋尾可獲得精礦產(chǎn)率68.19%、精礦TFe品位45.67%、精礦回收率87.16%、尾礦TFe品位14.42%、拋尾率31.81%的指標(biāo),拋尾尾礦中強(qiáng)磁性礦物損失量較小,處于合理范圍內(nèi)；實(shí)驗(yàn)室試驗(yàn)研究的結(jié)果顯示沉砂拋尾工藝是可行的。本論文在其實(shí)驗(yàn)室研究的基礎(chǔ)上,對(duì)其進(jìn)行了工業(yè)試驗(yàn)研究,探索合適的沉砂拋尾的工業(yè)應(yīng)用工藝流程。根據(jù)現(xiàn)場(chǎng)實(shí)際條件,分別進(jìn)行了兩種工藝流程的工業(yè)試驗(yàn)研究,第一種拋尾粗精礦高濃度自流進(jìn)入一段球磨機(jī)的試驗(yàn)流程,該流程簡(jiǎn)單明了地實(shí)現(xiàn)了沉砂拋尾工藝,但是受原有廠房結(jié)構(gòu)限制,為了保證粗精礦高濃度自流和一段球磨高濃度磨礦,只能運(yùn)行1臺(tái)拋尾磁選機(jī)；第二種拋尾粗精礦經(jīng)旋流器脫水后進(jìn)入一段球磨機(jī)的試驗(yàn)流程,該流程突破了原有廠房結(jié)構(gòu)的限制,能夠運(yùn)行2臺(tái)拋尾磁選機(jī)。兩種沉砂拋尾工藝流程的工業(yè)試驗(yàn)結(jié)果顯示,采用帶溢流的底箱順流型磁選機(jī)、磁選拋尾給礦濃度為45%-65%、調(diào)整一段分級(jí)旋流器沉砂嘴直徑Φ130mm的情況下,采用流程Ⅰ和流程Ⅱ都能使流程運(yùn)行均通暢；返砂比降低50%以上,基本低于200%；一段旋流器分級(jí)量效率提高約8-10個(gè)百分點(diǎn),質(zhì)效率提高約2個(gè)百分點(diǎn)；在確保鐵精礦品位略增高的情況下,一段球磨臺(tái)時(shí)處理量提高幅度9～10%,但需要的水量增加較多,需對(duì)循環(huán)水系統(tǒng)進(jìn)行改造。兩個(gè)工藝流程均能較大幅度提高系統(tǒng)產(chǎn)量,但相比之下,采用拋尾粗精礦高濃度自流進(jìn)一段球磨的工藝流程運(yùn)行成本較低,生產(chǎn)不加水量也較少。
[Abstract]:Vanadium titanomagnetite is a kind of complex iron ore which is composed mainly of iron, vanadium and titanium, accompanied by many valuable elements (such as chromium, cobalt, nickel, copper, scandium, Jia and platinum-group elements), and has high comprehensive utilization value.However, with the exploitation of mineral resources, mineral resources are becoming more and more "poor, fine, miscellaneous", vanadium titanomagnetite is of lower and lower grade, and the study of tail-throwing is becoming more and more important.Based on the existing technological process and ore supply conditions of Panzhihua Iron and Steel Group Mining Co., Ltd, the paper optimizes the relevant technical equipment with the aim of industrialized application of sand settling and tail-throwing process, and starts with the process mineralogical research of the primary stage cyclone for graded sand settling.The mineralogical study of sand settling process and the laboratory test of magnetic separation and tail-throwing were carried out, and on the basis of the laboratory research, the industrial test was carried out.Through chemical multielement analysis, particle size determination and monomer dissociation analysis of primary grinding ore, tailings and cyclones, the results show that the settling sand is mainly composed of four categories: titanomagnetite, ilmenite, sulphide and gangue.From the point of view of tail-throwing, ilmenite, sulphide and gangue are regarded as comprehensive gangue minerals together. The content of synthetic gangue minerals is about 455.The degree of monomer dissociation is very high.Based on the study of process mineralogy, laboratory tests were carried out. When the intensity was 0.2T, the concentrate yield was 68.1919, the concentrate TFe grade was 45.67, the concentrate recovery rate was 87.16%, the tailings TFe grade was 14.42%, and the tail throwing rate was 31.81%, when the concentration was strong 0.2 T, the concentrate yield was 68.19, the concentrate TFe grade was 45.67, the tailings recovery was 87.16%, and the tailings TFe grade was 14.42%.The loss of strong magnetic minerals in tailings is relatively small and within a reasonable range, and the results of laboratory tests show that the process of tailings sinking is feasible.On the basis of its laboratory research, this paper has carried on the industrial experiment research to explore the suitable industrial application technological process of sand sinking and tail-throwing.According to the actual conditions on the spot, two kinds of industrial experiments were carried out respectively. The first one is the test flow of the high concentration self-flow of the tail-throwing coarse concentrate into the first stage ball mill. The process is simple and clear to realize the process of sand sinking and tail-throwing.However, due to the limitation of the original factory structure, in order to ensure the high concentration of the coarse concentrate and the high concentration grinding of the first stage of ball mill, only one tail-throwing magnetic separator can be operated; the second kind of coarse concentrate can be dewatered by the cyclone and enter the test process of the first stage ball mill.The process breaks through the limitation of the original plant structure and can run 2 tail-throwing magnetic separators.The industrial test results of two kinds of sand settling and tail-throwing processes show that under the condition of adopting the bottom box downstream magnetic separator with overflow, the feed concentration of magnetic separation and throwing tail is 45 ~ 65, and the diameter of sand nozzle 桅 130mm is adjusted, the diameter of the sand nozzle of the first stage cyclone is adjusted.Both process 鈪，

本文編號(hào)：1755766