本文選題：錫石-多金屬硫化礦石 + 硫砷分離　； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：廣西大廠的錫石-多金屬硫化礦石屬于典型的復(fù)雜難選硫化礦,大廠錫石多金屬礦的尾礦含有錫、鉛、鋅、銻以及硫、砷等有價(jià)元素,目前尾礦中的大部分元素都沒有回收,造成了資源浪費(fèi),同時(shí)導(dǎo)致污染隱患。因此綜合回收尾礦中的有價(jià)元素,具有經(jīng)濟(jì)價(jià)值和社會(huì)效益,對(duì)大廠的可持續(xù)發(fā)展具有重要的意義。為了充分回收利用資源,對(duì)長(zhǎng)坡選礦廠鋅浮選尾礦進(jìn)行合理的工藝流程設(shè)計(jì)并對(duì)尾礦進(jìn)行試驗(yàn)研究。通過分離試驗(yàn)使錫精礦品位達(dá)49.4%,回收率48.19%；硫精礦品位達(dá)到46.46%,回收率達(dá)到84.68%。完成了小型試驗(yàn)研究及硫砷分離工業(yè)試驗(yàn)。應(yīng)用腐殖酸鈉與雙氧水組合降低硫精礦中的砷含量的工業(yè)試驗(yàn)。在長(zhǎng)坡選礦廠硫砷系統(tǒng)日處理200噸的規(guī)模下,經(jīng)過前期調(diào)試,連續(xù)運(yùn)轉(zhuǎn)16個(gè)班次的結(jié)果表明,采用新工藝能夠有效的降低硫精礦中的砷含量,提高硫精礦產(chǎn)品的價(jià)值。試驗(yàn)結(jié)果如下：1)大廠錫石多金屬硫化礦鋅浮選尾礦是一個(gè)含Sn 0.38%、 As2.03%、S 27.78%的尾礦,其脈石礦物主要是Si02,其次是Fe和CaO。具有回收價(jià)值的礦物是黃鐵礦、磁黃鐵礦、毒砂、砷黃鐵礦和錫石,其中含硫、砷礦物粒度較粗,而錫石大部分存在于細(xì)粒物料中。2)通過藥劑對(duì)砷礦物抑制效果的研究對(duì)比表明,對(duì)砷礦物抑制較好的有腐殖酸鈉、GZT、雙氧水、高錳酸鉀,但是硫精礦中砷含量都超過1%；次氯酸鈣對(duì)砷礦物有一定的抑制效果；對(duì)砷礦物無抑制效果的主要為硫酸鐵、硫酸亞鐵等。使用雙氧水與混合腐殖酸鈉藥劑組合對(duì)砷礦物的抑制效果比單用一種藥劑抑制效果更加明顯,當(dāng)藥劑用量增加到900g/t時(shí),硫精礦中砷的含量降到1%以下。3)通過采用重-浮-重流程,即采用錫石與部分硫化礦進(jìn)行同時(shí)回收得錫石毛精礦,毛精礦再進(jìn)行硫化礦浮選,浮選尾礦得錫石精礦,可品位為49.4%的錫精礦,錫的總回收率達(dá)到48.19%。4)無捕收劑作用時(shí),在酸性次氯酸鈉溶液、高錳酸鉀溶液和重鉻酸鉀溶液中黃鐵礦更容易氧化；堿性的三種氧化劑溶液都抑制了毒砂的氧化；酸性的高錳酸鉀和重鉻酸鉀抑制了毒砂的氧化,而酸性的次氯酸鈉促進(jìn)了毒砂的氧化。黃藥存在的條件下,隨著四種氧化劑濃度的增加,黃鐵礦電極的峰面積都大幅度下降,說明生成的雙黃藥受到抑制。5)通過連續(xù)運(yùn)行十六個(gè)班的工業(yè)試驗(yàn)情況表明,在不改變現(xiàn)場(chǎng)其它藥劑的情況下,采用腐殖酸鈉與雙氧水組合抑制砷礦物,砷礦物能夠被很好地抑制,在原礦硫品位為28.26%,含砷2.05%的條件下,獲得了品位為46.46%,含砷為0.88%,回收率為84.68%的硫精礦。
[Abstract]:The cassiterite-polymetallic sulphide ore in Dachang, Guangxi, is a typical complex refractory sulphide ore. The tailings of the Dachang cassiterite polymetallic ore contain valuable elements such as tin, lead, zinc, antimony, sulfur and arsenic. At present, most of the elements in the tailings have not been recovered. Causes the waste of resources, at the same time causes the pollution hidden danger. Therefore, comprehensive recovery of valuable elements in tailings has economic and social benefits, which is of great significance to the sustainable development of large factories. In order to fully recover and utilize resources, the reasonable technological process design of zinc flotation tailings in Changpo Concentrator was carried out and the tailings were tested and studied. Through the separation test, the grade of tin concentrate is 49.4 and the recovery rate is 48.19.The grade of sulfur concentrate reaches 46.46 and the recovery rate reaches 84.68. Small scale test and industrial test of sulfur and arsenic separation have been completed. Industrial experiment of reducing arsenic content in sulfur concentrate by combination of humic acid sodium and hydrogen peroxide. Under the scale of 200 tons of sulfur and arsenic treatment per day in Changpo Concentrator, the results show that the new process can effectively reduce the arsenic content in sulfur concentrate and improve the value of sulfur concentrate product. The results are as follows: (1) the tailings of Dachang cassiterite polymetallic sulphide ore zinc flotation is a tailings containing Sn 0.38, as 2.03 and S 27.78%. The gangue minerals are mainly Si02, followed by Fe and Cao. The minerals of recoverable value are pyrite, pyrrhotite, arsenopyrite, arsenopyrite and cassiterite, of which sulfur and coarse size of arsenic minerals, However, cassiterite mostly exists in fine grain. 2) by comparing the inhibition effect of the medicament on arsenic mineral, the results show that the better inhibition to arsenic mineral is sodium humic acid GZT, hydrogen peroxide, potassium permanganate, etc. Calcium hypochlorite has a certain inhibitory effect on arsenic minerals, and ferric sulfate and ferrous sulfate have no inhibitory effect on arsenic minerals. The inhibitory effect of the combination of hydrogen peroxide and mixed humic acid sodium on arsenic minerals is more obvious than that of one agent alone. When the dosage of the reagent is increased to 900g/t, The content of arsenic in sulfur concentrate is reduced to less than 1%. 3) cassiterite concentrate is recovered from cassiterite and partial sulphide ore simultaneously by heavy floating-heavy flow, which is then floated by sulphide ore flotation, and cassiterite concentrate is obtained by flotation tailings. When the total recovery rate of tin is 48.19.4%, the pyrite can be oxidized more easily in acidic sodium hypochlorite solution, potassium permanganate solution and potassium dichromate solution when the total recovery rate of tin reaches 48.19.4) without the action of collector, pyrite can be oxidized more easily in acidic sodium hypochlorite solution, potassium permanganate solution and potassium dichromate solution. The oxidation of arsenopyrite was inhibited by alkaline three oxidant solutions, the oxidation of arsenopyrite was inhibited by acidic potassium permanganate and potassium dichromate, and the oxidation of arsenopyrite was promoted by acidic sodium hypochlorite. In the presence of xanthate, the peak area of pyrite electrode decreased significantly with the increase of the concentration of four oxidants, indicating that the produced double xanthate was inhibited. Without changing other chemicals in the field, the arsenic mineral can be inhibited by the combination of humic acid sodium and hydrogen peroxide, and the arsenic mineral can be well inhibited. Under the condition that the sulfur grade of the original ore is 28.26 and the arsenic content is 2.05%, A sulfur concentrate with a grade of 46.46, a arsenic content of 0.88 and a recovery of 84.68% was obtained.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD952

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