Gold extraction and environmental protection (3)

For large and medium-sized cyanide gold extraction plants, the tailings can be alkaline chlorination or acid chloride. For example, cyanide tailings from a gold mine in Hebei Province, using lime added, chlorine gas under alkaline conditions (pH 9 ~ 11), tail slag after 2h purification treatment, ca

Example of underground mining-remaining mining method f…

Wenyu gold ore deposits in accordance with its conditions, using a comprehensive Shrinkage mining method, and achieved good technical and economic results. First, mining technical conditions It is filled with the deposit account of epithermal gold sulphides quartz vein type, in addition to gold,

Difficult to process gold-bearing ore and its pretreatm…

Where finely ground using conventional methods can not effectively extract most of the gold ore called refractory gold ore. The most common reasons why gold ore is difficult to handle are: 1) fine submicroscopic gold or gold was present in the state of wrapping or disseminated sulphide minerals, u

What information is required for new mine mining regist…

( 1 ) Registration application for mining rights; ( 2 ) Legal person business license or sole proprietorship or partnership business license during the validity period (if the mine affiliated to the legal entity has to provide the legal person business license and the mine business license); (3)

Dissolution of zinc calcine in dilute acid

Many acid and alkali leaching of oxides obey the shrinkage core model. A typical example is the dissolution of zinc calcine in dilute acid. It is calculated using equations (1) and (2) according to the ion diffusion coefficient and ion mobility of each chemical involved in the dissolution process.

Recycling and extracting gold with activated carbon fib…

The present invention is a method for extracting gold from gold-containing mass. In the invention, the activated carbon fiber is contacted with various concentrations of the gold-containing solution to adsorb gold, and after contacting for a period of time, the adsorbent material is separated from

Qujing major passenger stations will build car fast cha…

In order to fully implement the national new energy vehicle development strategy and requirements for the construction of charging facilities, Qujing Power Supply Bureau and Yunnan Qujing Transportation Group Co., Ltd. recently signed a strategic cooperation agreement for the construction of charg

The LED industry in February is not earth-shattering.

In the past 2016, several major international giants have shot and sold one by one, which has set off waves in the industry. Some dust settled, some have yet to be determined, and some of the highly-respected cross-border acquisitions have died, making people sigh. In February, some new developments

LED lighting products call for three major quality prob…

According to statistics, in the first two months of 2017 alone, the European Commission's non-food rapid alert system (RAPEX) initiated seven recalls of Chinese-made LED products. From the recall of products, mainly LED floodlights, LED lighting string, LED energy-saving lamps, etc., the main co