高硬度磁鐵礦選礦工藝設(shè)備優(yōu)化及自動(dòng)化控制研究
發(fā)布時(shí)間:2019-07-08 14:12
【摘要】:自2013年始,國內(nèi)TFe65%鐵礦石的價(jià)格從1200元/噸高位降至450元/噸低位,給礦山行業(yè)帶來了巨大的生存壓力。加上行業(yè)本身存在的諸多缺陷,選礦技術(shù)改造勢(shì)在必行。蒼山鐵礦為沉積巖成礦,礦石硬度值在f22-32之間,屬于高硬度難加工礦石。原設(shè)計(jì)處理原礦能力240萬t/a,鐵精礦品位TFe65%,金屬回收率59.71%,總選比4.09,綜合尾礦品位TFe14.19%,其中磁性鐵含量1%,年產(chǎn)鐵精礦58.68萬t,F(xiàn)實(shí)際處理原礦能力180萬t/a,金屬回收率56.1%,總選比為4.15,綜合尾礦品位TFe16.3%,尾礦磁性鐵含量超過1.5%,年產(chǎn)精礦43.4萬噸,各項(xiàng)指標(biāo)均無法達(dá)到設(shè)計(jì)要求。本次選礦工藝優(yōu)化和自動(dòng)控制技術(shù)升級(jí)充分利用了現(xiàn)有基礎(chǔ)和實(shí)踐經(jīng)驗(yàn),以節(jié)約投資和高效可靠、低成本運(yùn)行為原則。新設(shè)計(jì)保留原有三段一閉路加干選的生產(chǎn)工藝流程,更換破碎核心設(shè)備圓錐破碎,增大4#皮帶輸送能力、增加篩分設(shè)備,再對(duì)磁選機(jī)、旋流器分級(jí)、精礦脫水等工藝流程進(jìn)行精細(xì)調(diào)試,對(duì)自動(dòng)化控制進(jìn)行優(yōu)化升級(jí)。完成后選礦處理原礦量240萬t/a,噸精礦加工成本可降低20元,計(jì)算總投資回收期為1.67年。選礦工藝設(shè)備布局和自動(dòng)控制系統(tǒng)的優(yōu)化,使蒼山鐵礦在市場巨變中得以生存發(fā)展,為同類型礦山企業(yè)應(yīng)對(duì)市場變化和創(chuàng)新發(fā)展思路提供了借鑒基礎(chǔ)。
文內(nèi)圖片:
圖片說明:破碎系統(tǒng)工藝設(shè)備流程圖
[Abstract]:Since 2013, the price of domestic TFe65% iron ore has fallen from a high of 1200 yuan / ton to a low of 450 yuan / ton, which has brought great survival pressure to the mining industry. In addition, there are many defects in the industry itself, so it is imperative to reform mineral processing technology. Cangshan Iron Mine is a sedimentary rock mineralization, the ore hardness value is between f 22 鈮,
本文編號(hào):2511643
文內(nèi)圖片:
圖片說明:破碎系統(tǒng)工藝設(shè)備流程圖
[Abstract]:Since 2013, the price of domestic TFe65% iron ore has fallen from a high of 1200 yuan / ton to a low of 450 yuan / ton, which has brought great survival pressure to the mining industry. In addition, there are many defects in the industry itself, so it is imperative to reform mineral processing technology. Cangshan Iron Mine is a sedimentary rock mineralization, the ore hardness value is between f 22 鈮,
本文編號(hào):2511643
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