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本文研究了从三种不同的方铅矿－闪锌矿黄铁矿浮选中矿（主选地尾矿、锌中矿和黄铁矿中矿）提取金和银的新途径。经检定，三种中矿含金量分别为２．３，２．６和１．５ｇ／ｔ，含银量分别为８２，５３和２７ｇ／ｔ，并且岂有不同比例的硫比物矿物。每个样品加压氧化４ｈ氧化条件，温度２００℃或２２０℃、氧分压７００ｋＰａ．，初始酸度或者０或者３６．８ｇ／ＬＨ＿ＳＯ＿４．得到的固体产品或含有赤铁矿和铅黄钾铁矾．或者含有羟基硫酸铁和硫酸铅，大部分锌和铜连同一些铁在高初始酸度下加压氧化得到的固体产品．用Ｘ射线衍射（ＸＲＤ）检定和少量的银被溶解，并经过滤除去。证实，这些产品主要含有带有一些水合硫酸铁（Ｆｅ＿２Ｓ＿２Ｏ＿３、５Ｈ＿２Ｏ）的碱式硫酸铁（Ｆｅ（ＯＨ）ＳＯ＿４）和硫酸铅。在通常的ｐＨ（２．３－３．４）和Ｅｈ（２００－３５０ｍＶ。相对于ＳＣＥ）下以２ｇ／（Ｌ·ｈ）硫脲加入速率，用硫脲浸出这些产品４ｈ．得到金提取率８３－９２％，银提取率３９－９６％。提取率取决于样品的特性，对于黄铁矿中矿，银提取率最低．可能是在硫尿浸出时，黄钾铁矾的生成所致。浸出时，一些水合硫酸铁发生后应，并且３ｈ后．银明显地再沉淀。硫尿耗量是３４－７３ｋｇ／ｔ。在?
This article studies new ways to extract gold and silver from three different galena-sphalerite pyrite flotation mines (main tailings, zinc mine and pyrite mine). After verification, the three kinds of mine gold content were 2.3,2.6 and 1.5g / t, respectively, the amount of silver were 82,53 and 27g / t, and there is no different proportion of sulfur than minerals. Oxidation of each sample 4h oxidation conditions, temperature 200 ℃ or 220 ℃, partial pressure of oxygen 700kPa. , Initial acidity either 0 or 36.8 g / LH_SO_4. The resulting solid product either contains hematite and lead jarosite. Or a solid product containing iron (II) sulfate and lead sulphate and most of the zinc and copper together with some of the iron being oxidized at elevated initial acidity. X-ray diffraction (XRD) and a small amount of silver were dissolved and removed by filtration. It is confirmed that these products mainly contain basic iron sulfate (Fe (OH) SO 4) and lead sulfate with some hydrated ferric sulfate (Fe 2 S 2 O 3, 5H 2 O). These products were leached with thiourea at a rate of 2 g / (L • h) thiourea at typical pH (2.3-3.4) and Eh (200-350 mV vs. SCE) for 4 h. Get gold extraction rate of 83-92%, silver extraction rate of 39-96%. The extraction rate depends on the characteristics of the sample, and for pyrite, the extraction rate of silver is the lowest. Probably due to the formation of jarosite during leaching of sulfur urine. After leaching, some hydrated ferric sulphate should occur after 3h. Silver is obviously reprecipitated. Throat consumption is 34-73kg / t. in?