本文選題：磁鐵礦 + 赤鐵礦　； 參考：《華北理工大學(xué)》2015年碩士論文

【摘要】：我國(guó)鞍山式貧赤鐵礦儲(chǔ)量大但嵌布粒度細(xì),采用陰離子反浮選工藝微細(xì)粒級(jí)的鐵礦物流失嚴(yán)重。以司家營(yíng)礦鐵礦石為研究對(duì)象,開(kāi)展對(duì)磁鐵礦和赤鐵礦混合浮選中交互影響理論的研究,對(duì)提高微細(xì)粒赤鐵礦資源的綜合利用率具有一定的理論和實(shí)際指導(dǎo)意義。首先應(yīng)用陰離子捕收劑GK-68和抑制劑淀粉對(duì)磁鐵礦、赤鐵礦、石英純礦物和人工混合礦進(jìn)行浮選分離試驗(yàn)。通過(guò)單礦物浮選試驗(yàn)發(fā)現(xiàn),GK-68對(duì)磁鐵礦的捕收性能要明顯優(yōu)于赤鐵礦,淀粉對(duì)赤鐵礦的抑制效果要明顯優(yōu)于磁鐵礦;在CaO與淀粉的聯(lián)合作用下,磁鐵礦受淀粉抑制效果不好,浮選效果要比赤鐵礦差。通過(guò)不同磁/赤比例的人工混合礦物浮選試驗(yàn)發(fā)現(xiàn),浮選精礦鐵品位與尾礦鐵品位隨著磁鐵礦含量的增大而增高。在磁鐵礦含量為51.41%的人工混合礦浮選試驗(yàn)中,單獨(dú)添加淀粉,有一部分鐵礦物隨泡沫產(chǎn)品流失掉;在CaO與淀粉的聯(lián)合作用下,磁鐵礦與赤鐵礦受抑制作用逐漸增強(qiáng),精礦中鐵礦物的含量逐漸增加。在上述試驗(yàn)的基礎(chǔ)上,借助接觸角、電動(dòng)電位、吸附量以及紅外光譜等多種現(xiàn)代表面測(cè)試技術(shù)對(duì)礦物間交互作用機(jī)理進(jìn)行了探究。通過(guò)檢測(cè)發(fā)現(xiàn),在堿性介質(zhì)中,捕收劑GK-68能使磁鐵礦比赤鐵礦更容易疏水上浮。GK-68在赤鐵礦和磁鐵礦表面的吸附均為化學(xué)吸附,并且在三種礦物表面的吸附程度大小關(guān)系為磁鐵礦赤鐵礦石英。淀粉與磁鐵礦和赤鐵礦的吸附均為化學(xué)吸附,還有氫鍵的作用,淀粉對(duì)三種礦物的抑制作用大小為赤鐵礦磁鐵礦石英。綜合分析得出,在陰離子捕收劑GK-68浮選體系中,同赤鐵礦相比,磁鐵礦在GK-68較強(qiáng)的捕收作用以及淀粉較弱的抑制作用下,浮選性能較好,隨尾礦流失嚴(yán)重,因此磁鐵礦對(duì)赤鐵礦的陰離子反浮選分離結(jié)果有很大影響。
[Abstract]:Anshan type poor hematite in China has large reserves but fine grain size, and the iron minerals of fine grain grade by anionic reverse flotation process are seriously lost. Taking Sijiaying iron ore as the research object, the research on the interaction theory of magnetite and hematite mixed flotation has certain theoretical and practical guiding significance for improving the comprehensive utilization ratio of fine hematite resources. Firstly, the flotation separation tests of magnetite, hematite, quartz pure mineral and artificial mixed ore were carried out by using anionic collector GK-68 and depressant starch. Through the flotation test of single mineral, it is found that GK-68 is superior to hematite in collecting property, starch is superior to magnetite in inhibiting hematite, and magnetite is not well inhibited by starch under the combined action of Cao and starch. Flotation is worse than hematite. It is found that the iron grade of flotation concentrate and the iron grade of tailings increase with the increase of magnetite content through the flotation experiments of artificial mixed minerals with different magnetic / red ratios. In the flotation experiment of artificial mixed ores containing 51.41% magnetite, some iron minerals were lost with foam products when starch was added alone, and the inhibition of magnetite and hematite gradually increased under the combined action of Cao and starch. The content of iron minerals in the concentrate increases gradually. On the basis of the above experiments, the mechanism of mineral interaction was investigated by means of contact angle, electric potential, adsorption capacity and infrared spectroscopy. It was found that the adsorption of magnetite on hematite and magnetite surface was chemisorbed by GK-68 in alkaline medium, and the adsorption of GK-68 on the surface of hematite and magnetite was easier than that of hematite. And the adsorption degree on the surface of the three minerals is magnetite hematite quartz. The adsorption of starch with magnetite and hematite is chemisorption and hydrogen bond. The inhibition effect of starch on the three minerals is hematite magnetite quartz. Comprehensive analysis shows that in the anionic collector GK-68 flotation system, compared with hematite, magnetite has a better flotation performance under the stronger collecting effect of GK-68 and the weaker inhibition of starch, and the flotation performance is serious with the loss of tailings. Therefore, magnetite has a great influence on the separation of hematite by anion reverse flotation.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TD951

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 駱華寶;王永基;胡達(dá)驤;張之武;;我國(guó)鐵礦資源狀況[J];地質(zhì)論評(píng);2009年06期

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本文編號(hào)：2109217