不同碘值脂肪酸用于碳酸盐型胶磷矿反浮选的研究

以碳酸盐型胶磷矿为实验矿物,研究了不同碘值脂肪酸对该矿物浮选的差异性,发现随着脂肪酸钠碘值的升高,精矿P_2O_5品位、脱镁率和浮选速率均逐渐下降,而精矿MgO品位逐渐升高,说明不同碘值脂肪酸在碳酸盐型胶磷矿浮选中性能差别较大。     

云南东川低品位胶磷矿脱硅降镁常温正反浮选

为了降低云南东川低品位胶磷矿中脉石矿物的含量,对P2O5品位为18.30%,MgO和SiO2质量分数分别为5.05%和23.36%的原矿进行磨矿筛分分析,结果表明磷矿中P2O5均匀分布在每个粒级中,MgO富集在38μm以下的粒级中,SiO2出现分异现象。常温(20℃)下,采用正浮选1粗1精1扫联合反浮选1粗1扫的工艺流程进行该矿石的脱硅降镁浮选试验。结果表明该矿石属于硅镁含量较高的低品位胶磷矿,通过正反浮选得到了最终精矿P2O5品位27.59%、MgO质量分数0.81%、回收率84.06%的选矿指标。     

沙特Ma’aden碳酸盐型磷块岩浮选试验研究

沙特Ma’aden碳酸盐型磷块岩的主要有用矿物为氟磷灰石,主要脉石矿物为方解石,其次为石英;胶磷矿主要呈碎屑状、粒状和少量短柱状,易与方解石解离。采用反浮选工艺流程可获得精矿P2O5品位为32.85%、产率为51.37%、回收率为88.61%的选矿指标。     

石门胶磷矿选矿中几个技术问题的探讨

石门磷矿枫箱坡矿段属浅海相沉积层状磷块岩矿床,矿石类型为硅钙质胶磷矿,呈极细粒嵌布,P_2O_5平均品位16.12％,为中低品位磷矿石,矿石中有用矿物为胶磷矿(微碳氟磷灰石),脉石矿物主要为白云石、石英。矿石呈条带状、微层状、块状嵌布。胶     

宜昌某磷矿配矿浮选试验研究

宜昌某磷矿原矿P_2O_5品位为20.09%,MgO质量分数高达11.98%,嵌布粒度细,脉石矿物难以脱除。针对该矿石镁难以脱除的特点,将其与另外一种低镁宜昌磷矿(原矿P_2O_5品位27.65%,MgO质量分数为1.46%)按质量比1∶2的比例进行配矿,然后进行常温反浮选试验,以实验室自制药剂FZ为反浮选药剂,取得了混合精矿P_2O_5品位33.63%,MgO品位0.68%,回收率94.26%的闭路试验指标,实现了目标矿物与白云石等杂质矿物的有效分离。     

贵州某中低品位胶磷矿正反浮选试验研究

贵州某中低品位胶磷矿属于硅钙质磷矿石,针对该矿石性质,在磨矿细度-200目占82%的条件下,以新药剂EM-LP-01作为脱硅捕收剂,EM-LS-01作为脱镁捕收剂,采用正反浮选工艺,最终获得了P2O5品位30.86%,回收率为89.57%,含MgO0.77%的磷精矿,实现了磷矿物与脉石矿物的有效分离。     

我国沉积磷块岩的选别富集技术

(一)沉积磷块岩的矿石性质 我国大型沉积磷块岩矿床多数成矿于震旦纪—寒武纪的元古代和早古生代,磷矿物与脉石矿物紧密胶结共生,矿石坚硬。磷矿层赋存于白云岩和页岩的岩系中,多为倾斜或缓倾斜中厚矿体,层数多和规模大。 各主要矿区的矿石结构构造基本相似,磷矿物的结晶形态为隐晶质、微晶质和胶状均质体,呈鲕状、假鲕状结构。由胶磷矿鲕粒可构成致密块状,条带状、层状或微层状构造。在胶磷矿的鲕粒中或鲕粒间,混入数量不等的极细的碳酸盐和硅酸盐脉石矿物。由胶磷矿鲕粒密集构成的致密状磷块岩和含磷条带,其中P_2O_5含量高,杂质含量少,两条带状磷块岩品位高低则取决于含磷条带与脉石条带的厚度和比例。所以,磷块岩矿石     

浮选磷矿尾矿再选试验探索

云南某磷矿浮选尾矿主要矿物为胶磷矿,脉石矿物为石英-硅酸盐类矿物。对该浮选尾矿进行工艺矿物学研究和再磨再选试验,结果表明,可以获得磷精矿品位26.96%,回收率65.79%,尾矿磷品位4.72%的良好指标。     

钟祥磷矿选矿中不同捕收剂的浮选性能研究

根据钟祥磷矿的性质,采用正-反浮选工艺处理该胶磷矿。通过试验探索了不同性质的捕收剂对浮选的影响,最终选用合适的捕收剂按一定的配比进行试验,从原矿P2O5品位为19.20%,获得了磷精矿品位为30.51%,回收率80.13%的选矿指标,实现了目的矿物与脉石矿物的有效分离。     

晋宁低品位胶磷矿配矿浮选利用研究

为经济合理利用晋宁低品位胶磷矿,将其与昆阳高碳酸盐型胶磷矿配矿后浮选.在昆阳高碳酸盐型胶磷矿与晋宁低品位胶磷矿按质量比4配矿后,经过一粗一精一扫反浮选工业生产获得精矿w(P2O5)29.32％、w(MgO)0.88％、产率69.40％、P2O5回收率92.98％,尾矿w(P2O5)6.72％的选矿指标.     

高铁高砂煤矸石除铁及碱融活化合成4A分子筛

高铁高砂的劣质煤矸石经酸浸除铁和纯碱碱融活化处理后,除铁率达到96.8%,高岭石及石英砂被完全活化,煤矸石生成了可溶于碱液的中间产物霞石（NaAlSiO₄）及活性偏高岭石,将其再进行水热晶化得到了4A分子筛。用XRF、XRD、SEM等对原矿、预处理产物和产品进行了检测。结果表明：产品为较纯净的4A分子筛,粒径小于2 μm,干基产品的钙离子交换量为295.5 mg CaCO³/g。     

Flotation collophane from high-iron phosphate ore by using sodium ligninsulfonate as depressant

The contamination of iron emanating from limonite in phosphate concentrates has been a problem in phosphate ore processing. This study explored froth flotation to remove limonite away from collophane using sodium ligninsulfonate as depressant. It was observed that sodium ligninsulfonate displayed a good depression effect toward limonite but had little depression effect on collophane flotation. Additionally, the contact angle, zeta potential, and isotherm adsorption tests were performed to investigate the interaction mechanism of sodium ligninsulfonate on collophane and limonite minerals. It was found that the adsorption density of sodium ligninsulfonate onto limonite surface is higher than that onto collophane surface. The results of thermodynamic calculation indicated that sodium ligninsulfonate chemically adsorbed on limonite surface in alkaline condition, while a weak physical adsorption happened between sodium ligninsulfonate and collophane.     

湖北某胶磷矿可浮选性试验研究

针对湖北宜昌地区某难选胶磷矿性质,对某新建浮选装置试车矿样进行全流程小试。结果表明,采用一粗一精一扫的闭路浮选流程可以获得的磷精矿指标为w(P2O5)30.51%、产率90.24%、回收率97.38%、w(MgO)0.64%,实现了磷矿物与碳酸盐脉石矿物的有效分离,达到了指导新装置工艺设计及试车调试的目的。     

瓮福高镁低品位磷尾矿渣工艺特性的研究

研究瓮福高镁磷尾矿渣的物相和化学组成、反应特性及其发泡性能。结果表明:瓮福高镁磷尾矿渣的主要物相为CaMg(CO3)2、Ca5F(PO4)3,MgO的质量分数为18.02%,P2O5的质量分数为5.63%;其反应活性为98.08%,抗阻缓系数为6.30,该磷尾矿发泡比较严重,需要加入消泡剂。本研究可为综合利用高镁磷尾矿渣中的镁、磷提供必要的基础理论依据,对生产磷镁复合肥有一定的借鉴作用。     

新型碳酸盐矿物抑制剂的制备及应用研究

ＹＺＳ是一种有机螯合剂，在磷矿浮选中能和矿浆中的Ｃａ＾２＋，Ｍｇ＾２＋，Ｆｅ＾３＋等多种金属离子生成稳定的螯合物，提高浮选选择性，从而有效抑制方解石，白云石及其他脉石矿物。     

某白钨多金属矿浮选尾矿中萤石提取技术研究

为了缓解萤石资源严峻形势,提高低品位难选萤石矿以及共（伴）生型萤石矿的综合利用水平,结合矿石性质分析基础上,进行了系列条件试验研究、部分流程开路试验研究以及全流程闭路试验研究,研究结果表明：在一次粗选二次扫选,粗精矿再磨后进行五次精选,中矿顺序返回的原则流程条件下,以油酸为捕收剂、水玻璃和腐植酸钠为组合抑制剂、碳酸钠为pH调整剂,可实现该白钨多金属矿尾矿中萤石二次资源的有效回收利用;当捕收剂油酸用量450 g／t,组合抑制剂2．8 kg／t,碳酸钠1 kg／t时,在给矿CaF2品位16．41％的条件下,获得了CaF2品位为87．92％、CaF2回收率为53．53％的萤石精矿。     

Dispersion behaviour of fine collophane particles in the presence of different dispersants and metal ions

ABSTRACT

Recent, studies have shown that selective flocculation flotation is an effective method for enhancing the flotation of a fine mineral. Fine-grained collophane is difficult to disperse naturally, thereby affecting its subsequent flotation separation. Therefore, it is important to study the dispersion behaviour and mechanism of fine-grained cellophane to choose an appropriate method to improve the dispersion effect of the flotation system. The influences of different types of poly-anionic dispersants, such as (sodium silicate (ZSS); sodium carbonate (ZSC); sodium hexametaphosphate, ZSP) and metallic cations with different valences (Al³⁺, Ca²⁺, Na⁺) on the dispersion behaviour effect of fine-grained collophane were investigated in this work using the sedimentation balance method. The zeta potential measurements and the extended-DLVO (Derain-Landau-Verwey-Overbake) theory were used to explain the distinction of dispersion behaviour. In the presence of dispersants, the dispersion of collophane was in the order of ZSP>ZSS>ZSC. Zeta potential analysis indicated that the absolute value of the surface potential followed the order of ZSP>ZSS>ZSC. That is, the collophane particles in the ZSP system had stronger electrostatic repulsion, resulting in a better dispersion zeta potential effect zeta potential. ZSP was adopted as dispersant to study the effects of metal ions on dispersion. In the ZSP dispersant system, metal ions can suppress the dispersion behaviour of fine-grained collophane. The suppression effect followed the order of Al³⁺>Ca²⁺>Na⁺, because of the greater charge and better neutralization ability of trivalent ions for the same concentration. The results of the extended-DLVO calculations showed that the dispersion stability was attributed to the electrostatic repulsion and hydration repulsion, and hydration repulsion had a greater influence on the stability than electrostatic repulsion. This paper provides reference information for adjusting the dispersion behaviour effect of fine-grained collophane, thereby guiding the actual flotation separation.     

羟肟酸磷矿浮选捕收剂的设计合成及应用研究

以大豆油酸为原料,经α-氯代、酯化、成盐、肟化、酸化等单元反应合成了一种新型季铵盐羟肟酸磷矿浮选捕收剂,用于湖北某中低品位（P2O517．09％）硅钙质磷矿石的正反浮选工艺的研究。结果表明,相对于传统的脂肪酸类磷矿浮选捕收剂,该捕收剂的水溶性好,浮选性能得到明显改善,且原料易得,价格便宜。     

烷基羟肟酸浮选胶磷矿与白云石的性能研究

本文研究了螯合捕收剂——烷基羟肟酸(AH)对胶磷矿与白云石纯矿物的分选性能,揭示了捕收剂用量、pH、浮选温度、Ca2+、Mg2+、Fe3+及HPO42-对浮选性能的影响;羟肟酸实际矿物浮选,获得了P2O5品位31.16%,回收率90.73%,MgO品位1.26%的精矿指标。