Study of celestite flotation efficiency using sodium dodecyl sulfonate collector: factorial experiment and statistical analysis of data     

A. Martínez-L.  A. Uribe S.  F. R. Carrillo P.  J. Coreo A.  J. C. Ortiz 《International Journal of Mineral Processing》2003,70(1-4):83-97

Flotation tests of synthetic mixtures of celestite (SrSO₄) and calcite (CaCO₃) minerals using sodium dodecyl sulfonate as collector were carried out using a factorial experimental design 2³. The independent experimental variables included celestite grade in the feed (50% and 90% SrSO₄), conditioning pH (6.5 and 9) and sodium silicate depressant concentration (10⁻⁵ and 10⁻³ M). All experiments were performed at a constant collector concentration (10⁻⁴ M) and conditioning time of 15 min. The response variables were recovery and grade of SrSO₄ in the concentrate.The factors that had the greatest effect on the grade and recovery of celestite were the celestite grade in the feed (L) and the depressant concentration (C); also the combination of these factors significantly affected the response variables. The highest celestite yield (96% recovery, 98% grade) was obtained when a 90% of celestite grade in the feed was used.  相似文献   

Characterisation of sphalerite and pyrite flotation samples by XPS and ToF-SIMS   总被引：2，自引：0，他引：2  

A. Boulton  D. Fornasiero  J. Ralston 《International Journal of Mineral Processing》2003,70(1-4):205-219

The surface analytical techniques of X-ray Photoelectron Spectroscopy (XPS) and Time of Flight Secondary Ion Mass Spectroscopy (ToF-SIMS) have provided information on the type and concentration of species on the surface of sphalerite and pyrite particles in flotation concentrate and tail samples, but also on their distribution on each particle and across particles of different sizes. From this surface analytical study, a more accurate interpretation of the flotation results of sphalerite and pyrite minerals in a mixed mineral system could be made as a function of the concentrations of copper sulphate activator and xanthate collector, and particle size. In particular, it was found that sphalerite particles reporting to the concentrate are larger in size and contain less iron hydroxide on their surface than particles reporting to the tail. As for the pyrite particles, their lower recovery than the sphalerite particles is the result of a larger proportion of iron hydroxide on their surface inhibiting copper and collector adsorption.  相似文献   

湖北宜昌×××条带状磷块岩选矿试验研究     

丁晓姜  陈南华  张华军  李伟东 《化工矿产地质》2008,30(2)

×××磷矿属海相沉积型磷块岩矿床,主要具有胶状泥晶结构和磷质砂屑结构,以条带状构造为主。采用单一反浮选选矿工艺,使用硫酸为抑制剂、中化地质矿山总局地质研究院研制的K-02为捕收剂,在常温条件下取得较好的选矿工艺指标。进行了实验室重液浮沉试验。  相似文献   

浮选试验条件对粉煤灰脱炭的影响     

张覃  代文治  卯松  韩德鑫  肖文工  聂光华 《矿物学报》2007,27(3):563-566

贵州是煤炭资源大省，作为本省的主要能源，煤炭和电力一直扮有重要角色，随着“西电东送”工程的实施，煤炭的大量利用以及电厂装机的大幅增加，导致粉煤灰的排放量急剧增加，严重污染了当地的环境，因此，对粉煤灰的利用显得迫切。对贵州某地粉煤灰进行测定的基础上，进行了浮选条件试验，并对浮选产品进行扫描电镜、X射线衍射分析，通过对粉煤灰浮选试验进行单因素考察，发现浮选浓度、浮选药剂用量是分选效果最重要的影响因素，浮选效果是浮选产品利用的关键。  相似文献   

Estimating the recovery of size-liberation classes in industrial flotation cells: A simple technique for minimizing the propagation of the experimental error     

O.N. Savassi 《International Journal of Mineral Processing》2006

A simple technique, based upon interpolation and mass balancing, is proposed for minimizing the error propagation in the estimation of the flotation recovery of size-liberation particle classes. Liberation data obtained by a down-the-bank survey is used to illustrate application to industrial cells.  相似文献   

Effect of surface oxide/hydroxide products on the collectorless flotation of copper-activated sphalerite     

D. Fornasiero  J. Ralston 《International Journal of Mineral Processing》2006

The change in collectorless flotation of sphalerite with pH and Cu(II) concentration was correlated with the type and proportion of species present on the sphalerite surface. The solution and surface species were determined using a combination of analytical techniques including zeta potential measurement and X-ray photoelectron spectroscopy. An optimum copper concentration for maximum sphalerite flotation was identified, beyond which flotation decreased. This decrease in flotation coincided with the precipitation of copper hydroxide in neutral to mildly alkaline pH conditions. The hydrophobic polysulfide and hydrophilic copper hydroxide species were the main surface species influencing sphalerite flotation.  相似文献   

Effect of the bubble size on the dynamic adsorption of frothers and collectors in flotation     

Anh V. Nguyen  Chi M. PhanGeoffrey M. Evans 《International Journal of Mineral Processing》2006

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海洋中胶体研究的新进展   总被引：11，自引：3，他引：8  

赵卫红 《海洋与湖沼》2000,31(2):221-229

对近１０年以来胶体研究的报道和进展进行综合评述。Ｃｒｏｓｓ－ｆｌｏｗ超滤技术在海洋学上的应用促进了海洋胶体的进一步研究。研究表明,胶体物质天有机碳、氮、痕量金属、放射性核素及有机污染物的生物地球化学循环中可能起着重要作用。这一领域的研究对重新认识海洋物质循环的各种过程具有深远意义。  相似文献   

江西××胶磷矿选矿试验研究     

吴艳妮  丁晓姜 《化工矿产地质》2011,33(3):181-184

针对江西× ×难选胶磷矿,采用单一正浮选工艺进行试验.试验对各主要影响因素逐一研究分析,获得了最佳药剂制度,并在此基础上有针对性的进行了三组闭路试验,均获得了较满意的选别指标,满足了选矿厂的不同需求.研究结果为该胶磷矿的开发利用提供了技术支持.  相似文献   

湖南省××磷矿选矿工艺研究     

吴艳妮 《化工矿产地质》2014,(2):117-120

针对湖南省××磷矿矿石性质及可选特性,采用擦洗脱泥—浮选联合工艺选别,有效降低了能耗和药耗,使P2O5品位由15.78%富集至30.77%,P2O5回收率为82.40%,磷精粉达到酸法加工用磷矿石一等品Ⅰ级标准。  相似文献