含金黄铁矿 抑制的渣浆泵电化学机理是什么?

通过对硫化矿物的电化学浮选研究，OH抑制黄铁矿浮选的电化学机理如下。

①由于黄药氧化为双黄药的过程中没有OH或者H参加反应，所以扩浆pH对黄药在黄铁矿表面上的氧化动力学几乎没有影响。
    ②随着矿浆pH的增大，黄铁矿自身的氧化速度加快。在较小的阳极电位和较高的pH条件下，黄铁矿就出现了氧化电流。当

pH为11.4时，黄铁矿开始氧化的电位比黄药在黄铁矿表面氧化为双黄药的电位小。

③当pH小于11.4时，黄铁矿的氧化电位大于黄药在黄铁矿表面的氧化电位，即黄药氧化为双黄药的反应优先发生，氧气将在阴极被还原，OH不起抑制作用， 黄铁矿可浮。当pH 大于11.4时，将优先发生黄铁矿的自身氧化，这样在黄铁矿表面不仅不会形成疏水膜，而且亲水性更大，从而阻碍了黄原酸根离子氧化为双黄药以及黄铁矿的浮选，有关反应如下:
20什么是含金硫化矿的无捕收剂浮选?研究无捕收剂浮选有何意义?
    含金硫化矿的无捕收剂浮选是在含金硫化矿物电化学调控下捕收剂浮选的基础上发展起来的新的研究领域，它是充分利用硫化矿物自身的结构特征，依据电化学原理，通过调整矿浆电位来控制浮选体系的氧化还原性质，使矿物表面形成非捕收剂的疏水化，从而实现矿物的彼此分离。
    世界上许多金矿石的选矿，一般来说以浮选以及浮选与氧化浸金的联合流程为主。我国现有的黄金企业中，据统计采用单一浮选作业或者与其他选冶相结合的流程大概有70%以上，其浮选所得金精矿仍需要进一步湿法或者火法冶金技术处理。综观国内外的选矿实践，不论是对于以金为主的单一金矿石的浮选，还是对于以硫化矿为主的伴生金矿石的浮选，都不可避免地使用浮选捕收剂、抑制剂，起泡剂其至活化剂等，这些药剂特别是捕收剂(诸如黄药、黑药等试剂)的用量大、成本高、作业加药点多、管理复杂，而且金精矿的脱药效需低，残余的黄药和2号油或者MITBC 等仍然较多，从而影响下一步的氰化浸金作业效果。这也是目前国内外金矿石浮选-氰化浸金工艺普遍行在的问题。
    因此，开展含金硫化矿特别是与金关系密切的黄铁矿.黄铜矿等硫化矿物的无捕化剂浮选研究，对于降低生产成本、避免金精矿

浸金前的脱药工序、便于生产管理、提高后续氰化浸金作业金的回收率等，具有十分重要的理论价值和实际意义。渣浆泵厂家
    近年来，国内外许多科技工作者应用现代电化学原理和和测试技术、手段，从硫化矿浮选体系的氧化还原性质出发，将硫化矿物的浮游行为与矿浆的电位联系起来，使浮选过程更加便于控制和自动化，这也为含金硫化矿无捕收剂浮选的研究和应用的成功提供了可能性和现实性。国内外的研究结果表明，硫化矿物的无捕收剂浮选不仅可以实现，而且与常规而又传统的黄药类制收剂泡沫浮选技术相比，具有更好的选择性、更加简单的浮选药剂制度以及更高的精矿质量。

What is the electrochemical mechanism of slurry pump inhibited by auriferous pyrite?

Through the study of electrochemical flotation of sulfide minerals, the electrochemical mechanism of Oh inhibiting pyrite flotation is as follows.

① Because there is no oh or h in the process of xanthate oxidation, pH has little effect on the oxidation kinetics of xanthate on the surface of pyrite.

② With the increase of pulp pH, the oxidation rate of pyrite increases. Under the condition of lower anode potential and higher pH, pyrite appears oxidation current. When

When pH is 11.4, the potential of pyrite oxidation is smaller than that of xanthate oxidation on pyrite surface.

③ When the pH is less than 11.4, the oxidation potential of pyrite is greater than that of xanthate on the surface of pyrite. That is to say, the reaction of xanthate oxidation to double xanthate takes place preferentially, oxygen will be reduced at the cathode, oh does not play an inhibitory role, and pyrite can float. When the pH is greater than 11.4, pyrite self oxidation will take place preferentially, so that the hydrophobic membrane will not be formed on the surface of pyrite, and the hydrophilicity will be greater, thus hindering the oxidation of xanthate ion to double xanthate and the flotation of pyrite. The related reactions are as follows:

What is collector free flotation of gold bearing sulfide ores? What is the significance of studying collector free flotation?

The collector free flotation of gold bearing sulfide minerals is a new research field developed on the basis of collector flotation under the electrochemical control of gold bearing sulfide minerals. It is to make full use of the structural characteristics of sulfide minerals, according to the electrochemical principle, by adjusting the pulp potential to control the redox property of the flotation system, to make the mineral surface form the hydrophobic non collector, so as to achieve The separation of minerals from each other.

In the world, many gold ores are processed mainly by flotation and the combined process of flotation and oxidation leaching. According to statistics, more than 70% of the existing gold enterprises in China adopt single flotation operation or combined with other processes. The gold concentrate from flotation still needs to be further treated by hydrometallurgy or pyrometallurgy technology. In the practice of mineral processing at home and abroad, it is inevitable to use flotation collectors, inhibitors, frother to activators, etc., no matter for the flotation of single gold ore mainly composed of gold or associated gold ore mainly composed of sulfide ore. these reagents, especially collectors (such as xanthate, black agent, etc.), have a large amount, high cost, many dosing points and pipes The mechanism is complex, and the removal efficiency of gold concentrate needs to be low, and there are still many residual xanthate and No.2 oil or mitbc, which will affect the next cyanide leaching operation. This is also a common problem of gold ore flotation cyanidation at home and abroad.

Therefore, it is necessary to study the flotation of gold bearing sulfide minerals, especially pyrite, chalcopyrite and other sulfide minerals closely related to gold, in order to reduce production costs and avoid gold concentrate

It is of great theoretical value and practical significance that the process of decolorization before gold leaching is convenient for production management and the recovery rate of gold in subsequent cyanidation gold leaching is improved. Slurry pump manufacturer

In recent years, many scientific and technological workers at home and abroad have applied modern electrochemical principles and testing techniques and means, starting from the redox properties of sulfide flotation system, to connect the floating behavior of sulfide minerals with the potential of pulp, so that the flotation process is more convenient to control and automate, which also provides the possibility for the successful research and application of non collector flotation of gold bearing sulfide ores Sex and reality. The research results at home and abroad show that the collectors flotation of sulphide minerals can not only be realized, but also has better selectivity, simpler flotation reagent system and higher concentrate quality compared with conventional and traditional floatation technology of xanthate type collectors.