本文選題：菱鎂礦 + 浮選　； 參考：《遼寧科技大學(xué)》2015年碩士論文

【摘要】：本文所采用的菱鎂礦取自遼寧省海城市,其菱鎂礦礦石的礦物組成相對復(fù)雜,且礦物種類較多。其中主要礦物為菱鎂礦,其它伴生礦物有石英、滑石、斜綠泥石、白云石等,但含量均較低。菱鎂礦具有較高的耐火性、粘結(jié)性及其優(yōu)良的物理化學(xué)特性,在冶金、化工、建材、輕工及金屬鎂提純等領(lǐng)域有著廣泛的應(yīng)用。本課題進(jìn)行的調(diào)整劑對菱鎂礦浮選的影響試驗,制定出最優(yōu)的工藝流程及藥劑制度,以便提高精礦中MgO的品位及回收率。長期以來,在菱鎂礦的浮選過程中通常選用反—正浮選工藝流程,分別在十二胺和油酸體系下進(jìn)行。從某種意義上來講,添加適量的調(diào)整劑能夠有效地將有用礦物和脈石礦物分選。本課題通過進(jìn)行調(diào)整劑的選擇及用量試驗的對比,得到了優(yōu)良的產(chǎn)品指標(biāo)。本課題采用的海城菱鎂礦的礦石,主要鎂礦物為菱鎂礦,含量達(dá)86.55%。其次是滑石,含量為4.83%、白云石含量為1.50%,其它的雜質(zhì)礦物如石英(含量1.53%,斜綠泥石含量為1.25%,磷灰石含量為0.21%和微量鐵質(zhì)等。論文采用三段反浮選兩段正浮選的工藝流程對菱鎂礦進(jìn)行浮選。試驗結(jié)果表明,反浮選試驗條件為pH值為6.3,抑制劑六偏磷酸鈉用量150g/t,捕收劑十二胺用量150g/t;正浮選試驗條件為pH值為12,調(diào)整劑六偏磷酸鈉用量為200g/t,水玻璃用量2000g/t,捕收劑MB3用量為400g/t。最終得到精礦指標(biāo)為:MgO品位為47.24%,MgO回收率為75.69%,有害雜質(zhì)的含量為:SiO2含量占0.06%,CaO含量占0.70%,Fe2O3含量占0.32%,Al2O3含量占0.13%。綜上所述,本課題達(dá)到預(yù)期浮選效果。
[Abstract]:The magnesite ore used in this paper is taken from Haicheng City Liaoning Province. The mineral composition of magnesite ore is relatively complex and there are many kinds of minerals. The main minerals are magnesite, other associated minerals are quartz, talc, clinachlor, dolomite, etc. Magnesite has been widely used in metallurgy, chemical industry, building materials, light industry and metal magnesium purification due to its high fire resistance, adhesion and excellent physical and chemical properties. In order to improve the grade and recovery rate of MgO in concentrate, the optimal technological process and reagent system were worked out through the experiment of the effect of adjusting agent on magnesite flotation. For a long time the reverse-positive flotation process is usually used in the flotation of magnesite in the system of dodecylamine and oleic acid respectively. In a sense, the addition of a suitable amount of adjuster can effectively separate useful minerals from gangue minerals. Through the selection of adjuster and the comparison of the dosage test, the fine product index is obtained. The main magnesia ore of Haicheng magnesite is magnesite with a content of 86.55. The next is talc, 4.83%, dolomite 1.50, and other impurity minerals such as quartz (1.53), clinopyrite 1.25, apatite 0.21% and trace iron, etc. In this paper, magnesite flotation is carried out by three-stage reverse flotation and two-stage positive flotation. The results show that the conditions of reverse flotation are pH 6.3, sodium hexametaphosphate 150g / t, collector dodecylamine 150g / t, pH = 12, sodium hexametaphosphate 200g / t, water glass 2000g / t, collector MB3 400g / t. The recovery rate of MgO is 47.24%, the content of harmful impurity is 0.06% Sio _ 2, the content of Cao is 0.70%, the content of Fe _ 2O _ 3 is 0.32%, the content of Al _ 2O _ 3 is 0.13%, the content of MgO is 75.69%, the content of harmful impurity is 0.06%, the content of Cao is 0.70%, and the content of Fe _ 2O _ 3 is 0.32%. To sum up, this subject achieves the expected flotation effect.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD923

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