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含金黃鐵礦 抑制的渣漿泵電化學(xué)機(jī)理是什么?
通過(guò)對(duì)硫化礦物的電化學(xué)浮選研究，OH抑制黃鐵礦浮選的電化學(xué)機(jī)理如下。
①由于黃藥氧化為雙黃藥的過(guò)程中沒(méi)有OH或者H參加反應(yīng)，所以擴(kuò)漿pH對(duì)黃藥在黃鐵礦表面上的氧化動(dòng)力學(xué)幾乎沒(méi)有影響。
②隨著礦漿pH的增大，黃鐵礦自身的氧化速度加快。在較小的陽(yáng)極電位和較高的pH條件下，黃鐵礦就出現(xiàn)了氧化電流。當(dāng)
pH為11.4時(shí)，黃鐵礦開(kāi)始氧化的電位比黃藥在黃鐵礦表面氧化為雙黃藥的電位小。
③當(dāng)pH小于11.4時(shí)，黃鐵礦的氧化電位大于黃藥在黃鐵礦表面的氧化電位，即黃藥氧化為雙黃藥的反應(yīng)優(yōu)先發(fā)生，氧氣將在陰極被還原，OH不起抑制作用， 黃鐵礦可浮。當(dāng)pH 大于11.4時(shí)，將優(yōu)先發(fā)生黃鐵礦的自身氧化，這樣在黃鐵礦表面不僅不會(huì)形成疏水膜，而且親水性更大，從而阻礙了黃原酸根離子氧化為雙黃藥以及黃鐵礦的浮選，有關(guān)反應(yīng)如下:
20什么是含金硫化礦的無(wú)捕收劑浮選?研究無(wú)捕收劑浮選有何意義?
含金硫化礦的無(wú)捕收劑浮選是在含金硫化礦物電化學(xué)調(diào)控下捕收劑浮選的基礎(chǔ)上發(fā)展起來(lái)的新的研究領(lǐng)域，它是充分利用硫化礦物自身的結(jié)構(gòu)特征，依據(jù)電化學(xué)原理，通過(guò)調(diào)整礦漿電位來(lái)控制浮選體系的氧化還原性質(zhì)，使礦物表面形成非捕收劑的疏水化，從而實(shí)現(xiàn)礦物的彼此分離。
世界上許多金礦石的選礦，一般來(lái)說(shuō)以浮選以及浮選與氧化浸金的聯(lián)合流程為主。我國(guó)現(xiàn)有的黃金企業(yè)中，據(jù)統(tǒng)計(jì)采用單一浮選作業(yè)或者與其他選冶相結(jié)合的流程大概有70%以上，其浮選所得金精礦仍需要進(jìn)一步濕法或者火法冶金技術(shù)處理。綜觀國(guó)內(nèi)外的選礦實(shí)踐，不論是對(duì)于以金為主的單一金礦石的浮選，還是對(duì)于以硫化礦為主的伴生金礦石的浮選，都不可避免地使用浮選捕收劑、抑制劑，起泡劑其至活化劑等，這些藥劑特別是捕收劑(諸如黃藥、黑藥等試劑)的用量大、成本高、作業(yè)加藥點(diǎn)多、管理復(fù)雜，而且金精礦的脫藥效需低，殘余的黃藥和2號(hào)油或者MITBC 等仍然較多，從而影響下一步的氰化浸金作業(yè)效果。這也是目前國(guó)內(nèi)外金礦石浮選-氰化浸金工藝普遍行在的問(wèn)題。
因此，開(kāi)展含金硫化礦特別是與金關(guān)系密切的黃鐵礦.黃銅礦等硫化礦物的無(wú)捕化劑浮選研究，對(duì)于降低生產(chǎn)成本、避免金精礦
浸金前的脫藥工序、便于生產(chǎn)管理、提高后續(xù)氰化浸金作業(yè)金的回收率等，具有十分重要的理論價(jià)值和實(shí)際意義。渣漿泵廠家
近年來(lái)，國(guó)內(nèi)外許多科技工作者應(yīng)用現(xiàn)代電化學(xué)原理和和測(cè)試技術(shù)、手段，從硫化礦浮選體系的氧化還原性質(zhì)出發(fā)，將硫化礦物的浮游行為與礦漿的電位聯(lián)系起來(lái)，使浮選過(guò)程更加便于控制和自動(dòng)化，這也為含金硫化礦無(wú)捕收劑浮選的研究和應(yīng)用的成功提供了可能性和現(xiàn)實(shí)性。國(guó)內(nèi)外的研究結(jié)果表明，硫化礦物的無(wú)捕收劑浮選不僅可以實(shí)現(xiàn)，而且與常規(guī)而又傳統(tǒng)的黃藥類(lèi)制收劑泡沫浮選技術(shù)相比，具有更好的選擇性、更加簡(jiǎn)單的浮選藥劑制度以及更高的精礦質(zhì)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.
