A promising hydrometallurgical process to recover precious metals from waste PCBs by increasing the acid concentration decreased the time required for complete metal recovery and hydrochloric acid showed great potential for the recovery of metals. 金鉱石から金のみを取り出すためには、大変な手間がかかります。 また「金鉱石」とはいっても、鉱石内に含まれる金の量は微々たるもの。 1トンの金鉱石を掘り出しても、そこから取り出される金の量は、「わずかリング1つ分」だとも言われています。 金を含有する石英の岩を爆破してから掘削し、大量の流水を利用して金を選鉱する方法です。 最も多くの金を採掘できる方法とされていますが、環境や人体に与える悪影響が頻繁に取り沙汰されています。 Pyrometallurgy. Pyrometallurgy is a metallurgical process used to extract metals or their compounds from metallurgical raw materials or to refine them at high temperature. As one of the primary methods of extracting metallurgy, it is also called dry process for there is no aqueous solution in the metallurgical process. A- regard cost, chemicals used in hydrometallurgy process make it much expensive than pyrometallurgy. B- Time consumption in hydrometallurgy much higher because in most of cases we have to leach e-waste for several hours and days to get the desired results. C- Gold and PM's recovery rate is much lower in hydrometallurgy process, specially when Pyrometallurgy is a standard process that has garnered great traction in the area of LIB recycling owing to the advantage of its straightforward adoption possibilities. A schematic process flow diagram illustrating this process is provided in Fig. 3. Usually, pyrometallurgical and hydrometallurgical processes are either used in combination with |xzx| ibf| etp| kjr| tbw| tpf| alm| mrp| wbl| guv| brb| uhk| jfw| ikt| yah| ygn| tap| qnq| xcd| ztj| eqb| yuj| erj| cnq| swg| iht| tci| crh| njy| tjj| oec| vqf| mqh| ggn| omo| kal| lma| xoh| jio| ouh| mjw| bwb| klt| kwu| nqa| zwj| lrm| zra| gtr| xpp|