膠磷礦雙反浮選的藥劑與工藝研究
發(fā)布時(shí)間：2018-12-24 14:37
【摘要】：我省是磷礦資源大省,但近幾年受困于產(chǎn)能過剩,國內(nèi)市場趨于飽和,多家磷化工企業(yè)出現(xiàn)虧損。根據(jù)《2015年關(guān)稅實(shí)施方案》,磷肥的出口成本會(huì)有所下降,顯示了政府鼓勵(lì)磷肥出口的立場。現(xiàn)階段正是充分利用中低品位磷礦選礦試劑技術(shù)的開發(fā),來實(shí)現(xiàn)產(chǎn)業(yè)結(jié)構(gòu)的優(yōu)化升級(jí),突破磷資源企業(yè)發(fā)展瓶頸的好時(shí)機(jī)。本文以菜籽油為原料,合成了新型陰離子脫鎂捕收劑CZ-3;針對(duì)大峪口地區(qū)膠磷礦,采用雙反浮選工藝,進(jìn)行了系統(tǒng)的條件試驗(yàn)、閉路試驗(yàn)和中試試驗(yàn);并通過紅外光譜、Zeta電位等測試手段深入研究了CZ-3的作用機(jī)理。藥劑組合試驗(yàn),通過藥劑組合的條件對(duì)比試驗(yàn)確定了新型捕收劑CZ-3的最終配方,發(fā)現(xiàn)將菜籽油與硬脂酸鈉按4∶6混合,并添加捕收劑用量6%的表面活性劑BK,可以產(chǎn)生良好的協(xié)同作用,取得較高的浮選指標(biāo);文中比較了CZ-3與MG-7在不不同溫度下的浮選指標(biāo),發(fā)現(xiàn)在低溫環(huán)境下,CZ-3可以獲得比MG-7更好的精礦品位和回收率。浮選工藝試驗(yàn),以新合成的CZ-3為捕收劑浮選大峪口地區(qū)膠磷礦。試驗(yàn)礦樣屬沉積型磷塊巖,礦石類型為硅鈣質(zhì)膠磷礦,有用礦物是磷酸鹽礦物,與其伴生的脈石礦物主要有石英、長石、白云石和方解石等。據(jù)多元素分析結(jié)果,該礦樣P2O5品位低,含量僅16.41%,SiO2(28.64%)和MgO(4.35%)的含量都比較高。通過雙反浮選試驗(yàn),確立最佳工藝流程為:脫鎂一粗一精三掃;脫硅一粗一精一掃;在最佳藥劑制度下,可得到精礦P2O5品位28.35%、回收率82.30%的良好指標(biāo),主要脈石礦物MgO和SiO2的含量分別降低至0.90%和3.85%,達(dá)到磷化工原料的品質(zhì)要求。中試試驗(yàn)取得72小時(shí)連續(xù)試驗(yàn)結(jié)果,P2O5/%為17.86%的原礦經(jīng)雙反浮處理后,精礦P2O5品位達(dá)到了28.97%,回收率77.15%,同時(shí)MgO/%由4.47%下降至2.28%,脫鎂和脫硅尾礦的P2O5/%分別為7.12%和8.38%。藥劑CZ-3能很好的適應(yīng)中試試驗(yàn)環(huán)境,其耐低溫、藥劑消耗量小的優(yōu)點(diǎn)得到進(jìn)一步的驗(yàn)證;通過脫泥斗和消泡劑的共同作用,陽離子脫硅的泡沫現(xiàn)象得到了較大的改善。紅外光譜圖顯示,CZ-3是含有較長碳直鏈的有機(jī)化合物,其分子結(jié)構(gòu)中含有羥基(—OH)官能團(tuán)和羧基(—COO—)官能團(tuán);在酸性條件下,CZ-3可以牢固的吸附在在白云石表面,并能提供疏水基團(tuán),從而使白云石的可浮性大大增強(qiáng)。Zeta電位研究顯示,膠磷礦和白云石在純水中的零電點(diǎn)分別為4.1,和6.5,加入CZ-3后,兩種礦物的Zeta電位均有降低,但白云石的Zeta電位下降幅度明顯更大,說明CZ-3對(duì)白云石的吸附能力大于其對(duì)膠磷礦的吸附,因此能有效地分離兩種礦物。
[Abstract]:Our province is a big province of phosphate rock resources, but in recent years, it is trapped in overcapacity, the domestic market tends to saturation, and many phosphorous chemical enterprises suffer losses. According to the tariff implementation Plan 2015, the cost of phosphate fertilizer export will be reduced, indicating the government's position to encourage the export of phosphate fertilizer. At the present stage, it is a good time to make full use of the technology of mineral processing reagent of medium and low grade phosphate rock to realize the optimization and upgrading of industrial structure and to break through the bottleneck of the development of phosphorus resource enterprises. In this paper, a new anionic demagnesium collector CZ-3; was synthesized from rapeseed oil as raw material. In this paper, conditions tests, closed circuit tests and pilot-scale tests were carried out for the binophosphate rock in Dayukou area by double reverse flotation process. The action mechanism of CZ-3 was studied by infrared spectrum and Zeta potential. The final formula of the new collector CZ-3 was determined by the contrast test of the conditions of pharmaceutical combination. It was found that the mixture of rapeseed oil and sodium stearate was 4:6, and the amount of collector was 6%. The surfactant BK, was added. A good synergistic effect can be produced and a higher flotation index can be obtained. The flotation indexes of CZ-3 and MG-7 at different temperatures are compared. It is found that CZ-3 can obtain better concentrate grade and recovery than MG-7 at low temperature. Flotation process test, using new synthetic CZ-3 as collector, flotation of colloidal phosphate rock in Dayukou area. The test samples belong to sedimentary phosphorite, the ore type is silicon-calcareous cementophosphate, and the useful mineral is phosphate mineral. The gangue minerals associated with it are mainly quartz, feldspar, dolomite and calcite. According to the results of multielement analysis, the P2O5 grade of the sample is low, and the content of 16.41% SiO2 (28.64%) and MgO (4.35%) are relatively high. Through the double reverse flotation test, the optimum technological process is established as follows: demagnesium removal, desilication, and desilication. Under the optimum reagent system, a good index of P2O5 grade of concentrate 28.3535 and recovery of 82.30% can be obtained. The contents of MgO and SiO2 of main gangue minerals are reduced to 0.90% and 3.85% respectively, which meet the quality requirements of phosphorus chemical raw materials. The results of 72 hours continuous test were obtained in the pilot test. The P2O5 grade of the concentrate reached 28.97, the recovery rate was 77.15%, and the MgO/% decreased from 4.47% to 2.28% after the original ore with P _ 2O _ 5 /% 17.86% was treated with double reverse floatation. The P _ 2O _ 5 /% of demagnesium and desilication tailings were 7.12% and 8.38%, respectively. The advantages of low temperature resistance and low medicament consumption were further verified, and the foam phenomenon of cationic desilication was greatly improved by the joint action of desilting bucket and defoaming agent. Infrared spectra showed that CZ-3 was an organic compound with long carbon chain, and its molecular structure contained hydroxyl (- OH) functional groups and carboxyl (- COO-) functional groups. Under acidic conditions, CZ-3 can be firmly adsorbed on the surface of dolomite and can provide hydrophobic groups, thus greatly enhancing the floatability of dolomite. The zero electric points of colloid phosphate rock and dolomite in pure water were 4.1 and 6.5 respectively. After adding CZ-3, the Zeta potential of both minerals decreased, but the Zeta potential of dolomite decreased more obviously. The results show that the adsorption ability of CZ-3 to dolomite is greater than that of binophosphate, so it can effectively separate the two minerals.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD97;TD923.1
本文編號(hào)：2390755
[Abstract]:Our province is a big province of phosphate rock resources, but in recent years, it is trapped in overcapacity, the domestic market tends to saturation, and many phosphorous chemical enterprises suffer losses. According to the tariff implementation Plan 2015, the cost of phosphate fertilizer export will be reduced, indicating the government's position to encourage the export of phosphate fertilizer. At the present stage, it is a good time to make full use of the technology of mineral processing reagent of medium and low grade phosphate rock to realize the optimization and upgrading of industrial structure and to break through the bottleneck of the development of phosphorus resource enterprises. In this paper, a new anionic demagnesium collector CZ-3; was synthesized from rapeseed oil as raw material. In this paper, conditions tests, closed circuit tests and pilot-scale tests were carried out for the binophosphate rock in Dayukou area by double reverse flotation process. The action mechanism of CZ-3 was studied by infrared spectrum and Zeta potential. The final formula of the new collector CZ-3 was determined by the contrast test of the conditions of pharmaceutical combination. It was found that the mixture of rapeseed oil and sodium stearate was 4:6, and the amount of collector was 6%. The surfactant BK, was added. A good synergistic effect can be produced and a higher flotation index can be obtained. The flotation indexes of CZ-3 and MG-7 at different temperatures are compared. It is found that CZ-3 can obtain better concentrate grade and recovery than MG-7 at low temperature. Flotation process test, using new synthetic CZ-3 as collector, flotation of colloidal phosphate rock in Dayukou area. The test samples belong to sedimentary phosphorite, the ore type is silicon-calcareous cementophosphate, and the useful mineral is phosphate mineral. The gangue minerals associated with it are mainly quartz, feldspar, dolomite and calcite. According to the results of multielement analysis, the P2O5 grade of the sample is low, and the content of 16.41% SiO2 (28.64%) and MgO (4.35%) are relatively high. Through the double reverse flotation test, the optimum technological process is established as follows: demagnesium removal, desilication, and desilication. Under the optimum reagent system, a good index of P2O5 grade of concentrate 28.3535 and recovery of 82.30% can be obtained. The contents of MgO and SiO2 of main gangue minerals are reduced to 0.90% and 3.85% respectively, which meet the quality requirements of phosphorus chemical raw materials. The results of 72 hours continuous test were obtained in the pilot test. The P2O5 grade of the concentrate reached 28.97, the recovery rate was 77.15%, and the MgO/% decreased from 4.47% to 2.28% after the original ore with P _ 2O _ 5 /% 17.86% was treated with double reverse floatation. The P _ 2O _ 5 /% of demagnesium and desilication tailings were 7.12% and 8.38%, respectively. The advantages of low temperature resistance and low medicament consumption were further verified, and the foam phenomenon of cationic desilication was greatly improved by the joint action of desilting bucket and defoaming agent. Infrared spectra showed that CZ-3 was an organic compound with long carbon chain, and its molecular structure contained hydroxyl (- OH) functional groups and carboxyl (- COO-) functional groups. Under acidic conditions, CZ-3 can be firmly adsorbed on the surface of dolomite and can provide hydrophobic groups, thus greatly enhancing the floatability of dolomite. The zero electric points of colloid phosphate rock and dolomite in pure water were 4.1 and 6.5 respectively. After adding CZ-3, the Zeta potential of both minerals decreased, but the Zeta potential of dolomite decreased more obviously. The results show that the adsorption ability of CZ-3 to dolomite is greater than that of binophosphate, so it can effectively separate the two minerals.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD97;TD923.1
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