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安徽快3开奖结果 News
渣浆泵过流件什么是液氯浸出法?
添加时间:2019.11.02

渣浆泵过流件什么是液氯浸出法?

液氯化法,通常又称为水溶液氯化法或水氯化法。此法初期采用硫酸漂白粉的溶液从有中成功地浸出金,并用硫酸亚铁从出液中沉淀出金。一般说来, 中凡是王水可溶的物质,液氰化法也可以溶解。采用液化法,金的浸出率比化法高,且的价格比氰化物低。

种强氧化剂,能与大多数元素起反应。对金来说,它既水氧化剂又是络合剂。金被氯化而发生氧化离于络合,故称水氯化浸出金,其化学反应为

这一反应是在溶液中氯浓度明显增高的低PH条件下快速进行的。

用于液氧化法的出剂主要是(湿) 氯和氯盐。由于氯的活性

很高,不存在金粒表面被钝化的问题。因此,在给定的条件下,金的浸出速度很快,般只需1~2h。这种方法更适合于处理碳质金矿、经酸洗过的含金矿石、锑渣、含砷精矿或矿石等。

30什么是电氯化浸出法?

在水溶液中,金可与氯化合生成易溶性氯化金,由此提出了金矿石的氯化浸出法。金矿石氯化浸出剂是氯气。氯化浸出法的进一步发展是利用电解氯化钠溶液得到的氯浸出矿石中的金。应用这种电化学浸出方法从矿石中浸出金并由溶液中析出金的方法也称电氯化浸出法,简称电氯化法。
    在隔膜电解浸出槽中,电解氯化钠溶液时,H+在阴极上放电析出气态氢,CI- 在阳极上放电析出气态氣。在阳极上OH-也可能放出O2

过程产生的原子氯或分子氯对金都有强的氧化作用。氯溶解在食盐溶液中生成次氯酸,当溶液呈碱性时,则生成易分解的次氯酸盐。
    在金矿石电化学浸出过程中,由于食盐点解,过程中消耗的气态氯和氧得到不断的补充,促使浸出反应迅速进行。电氯化浸出时金的溶解过程也是一种扩散过程,金的浸出速率受搅拌强度和温度影响。通常,温度升高对金浸出有利,但是,当温度高于40C以后,金浸出速率就显著降低。搅拌强度过大,会使氯渗透到阴极液,碱渗透到阳极液,或使分子氯大量挥发,导致溶液中氧过量,造成矿石中的金部分钝化。

31什么是 溴化浸出法?

溴与氯都是卤族元素,它们有着比较相似的化学性质。溴化浸

出法与氯化浸出法很相似,但它们之间也存在着些重要的差别。单质形式的溴是种稠密的发烟的红色液体, 而单质则是种气体,并且需要大量设备来运输、贮存和转换成液体。溴的一个很大优点可归结为,浸出速度快、无毒、对pH变化的适应性强、环保设施费用低。
   金在溴-溴化物溶液中溶解是电化学过程:
                               2Au3Br2 +2Br--- > 2AuBra
    在室温下,最佳溶金区域在pH4~6,电位0。7~~0。9V

32 什么是丙二腈法浸出金?

丙二腈(CNCH2CN)别名氰代甲烷,无色结晶,有毒,可溶于水、醇、醚和苯,在碱性溶液中可形成阴离子:  

该离子与金络合形成Au[CH(CN)2]溶液,此络合物比金氰络离子要大,往往超过碳质颗粒的内孔隙,使碳对其吸附率降低,因此用丙二腈浸出碳质矿石中的金可达到较高的浸出率。
33什么是 生物浸出与生物氧化?
    人类有目的地采用生物技术从矿物中直接或间接提取有用金属。根据生物作用于目的矿物的过程与结果的不同,生物对矿物的氧化过程可以分为两类:生物浸出(Bio eching)和生物氧化CBio oidtin)。生物浸出是指利用细菌对含有目的元素的矿物进行氧化,被氧化后的目的元素以离子状态进溶液中,然后对浸出的液近步进行处理, 从中提取有用元素,浸渣被玉弃。如细对铜、锌、铀、镍、钻等硫化矿物的氧化,即属于生物浸出。生物氧化是指利用细对包目的矿物(或元素)的非目的矿物进行氧化,被氧化后的非目的矿物以离子状态进入溶液中,溶液被丢弃处理,而目的可物(成元素)或被解离或呈裸露状态仍留存于氧化 渣浆泵

安徽快3开奖结果What is the liquid chlorine leaching method for the overflow part of slurry pump?


Liquid chlorination, also known as water solution chlorination or water chlorination. In the initial stage of this method, gold was successfully leached from the solution with cyanogen water or sulfuric acid plus bleaching powder, and gold was precipitated from the leached solution with ferrous sulfate. Generally speaking, all the substances soluble in aqua regia in raw materials can also be dissolved by liquid cyanidation. The leaching rate of gold is higher and the price of chlorine is lower than that of cyanide.


Chlorine is a strong oxidant and can react with most elements。 For gold, it is both a water oxidizer and a complexing agent。 Gold is oxidized by chlorination and complexed with chlorine, so it is called water chlorination leaching gold。 Its chemical reaction is


安徽快3开奖结果The reaction was carried out rapidly under the condition of low pH, when the concentration of chlorine in the solution increased obviously.


安徽快3开奖结果The main leachables used in liquid oxidation are (wet) chlorine and chloride salts。 Because of the activity of chlorine


Very high, there is no passivation problem on the surface of gold particles. Therefore, under the given conditions, the leaching rate of gold is very fast, generally only 1 ~ 2H. This method is more suitable for the treatment of carbonaceous gold ore, acid washed gold bearing ore, antimony slag, arsenic bearing concentrate or ore.


What is electrochlorination leaching?


In aqueous solution, gold can be combined with chlorination to form soluble gold chloride, thus a chlorination leaching method of gold ore is proposed. Chlorine is the leaching agent of gold ore. The further development of chloride leaching is the leaching of gold from ores by chlorine obtained from electrolytic sodium chloride solution. This electrochemical leaching method is also called electrochlorination leaching method, which leaches gold from ore and leaches gold from solution.

When electrolyzing sodium chloride solution in the membrane electrolyzer, H + discharges gaseous hydrogen on the cathode, and CI - discharges gaseous gas on the anode。 Oh - may also release O2 on the anode。


The atomic chlorine or molecular chlorine produced in the process has strong oxidation effect on gold. Chlorine dissolves in the salt solution to form hypochlorite. When the solution is alkaline, it will form hypochlorite which is easy to decompose.

In the process of electrochemical leaching of gold ores, the gaseous chlorine and oxygen consumed in the process are continuously supplemented due to the salt spot decomposition, which promotes the leaching reaction to proceed rapidly. The dissolution process of gold is also a diffusion process. The leaching rate of gold is affected by stirring intensity and temperature. Generally, the increase of temperature is favorable for gold leaching, but when the temperature is higher than 40C, the gold leaching rate will be significantly reduced. If the stirring intensity is too high, chlorine will permeate the cathode liquid, alkali will permeate the anode liquid, or a large amount of molecular chlorine will volatilize, resulting in excessive oxygen in the solution and passivation of gold in the ore.


What is bromination leaching?


Bromine and chlorine are both halogens。 They have similar chemical properties。  Bromination


The extraction method is similar to the chlorination leaching method, but there are some important differences between them. Bromine in its elemental form is a dense, smoky red liquid, while chlorine in its elemental form is a gas and requires a large number of equipment to transport, store and convert it into a liquid. A great advantage of bromine can be attributed to its fast leaching speed, innocuity, strong adaptability to pH change and low cost of environmental protection facilities.

安徽快3开奖结果The dissolution of gold in bromine bromide solution is an electrochemical process

2au x 3Br2 + 2Br --- > 2aubra

安徽快3开奖结果At room temperature, the best gold dissolving region is pH 4 ~ 6, potential 0。7 ~ ~ 0。9V。


What is the leaching of gold by propionitrile?


Cnch2cn, also known as Cyanomethane, is colorless, crystalline, toxic, soluble in water, alcohol, ether and benzene, and can form anions in alkaline solutions


This complex is larger than that of gold cyanogen complex, which often exceeds the internal pores of carbonaceous particles and reduces the adsorption rate of carbon。 Therefore, the leaching rate of gold from carbonaceous ores by malondionitrile can be higher。

What is bioleaching and biooxidation?

安徽快3开奖结果Human beings purposefully use biotechnology to extract useful metals directly or indirectly from minerals. According to the different processes and results of biological action on the target minerals, the biological oxidation processes of minerals can be divided into two categories: bioleaching and biooxidation CBIO oidin. Bioleaching refers to the use of bacteria to oxidize the minerals containing the target elements, the target elements after being oxygenated enter the solution in the form of ions, and then the leached solution is treated in the next step The useful elements are extracted from it and the dregs are discarded by jade. For example, the oxidation of sulfide minerals such as copper, zinc, uranium, nickel and diamond by bacteria belongs to bioleaching. Biological oxidation refers to the use of bacteria to oxidize the non-target minerals (or elements) that surround the target minerals. After being oxidized, the non-target minerals enter the solution in an ionic state, and the solution is discarded for treatment, while the target minerals (as elements) are dissociated, or remain in the exposed state in the oxidation slag slurry pump








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