Moreover, many key technologies are confidential or patented technologies
For example, there is a technology called the production line of combined purification of alloy gold from complex gold mud by sulfuric acid wet method and fire method, which was successfully developed by technicians after a series of qualitative and semi-quantitative tests on the basis of improving the smelting process in the alchemy room
This technology has reduced the refining cost of alloy gold by more than 5%. In the past, one batch of gold mud was smelted twice, but now two batches of gold mud can be smelted at one time, with good slagging, which reduces the loss of gold and silver in the slag phase, shortens the smelting time and prolongs the service life of the crucible. This process is the first time to use domestic graphite crucible for smelting. Up to now, 6 batches of alloy gold ingots have been successfully smelted, and the condition is still good.
it is understood that this process is the first of its kind in China, and has obvious advantages such as low investment, high efficiency, low production cost, strong adaptability of raw materials, environmental protection and safety, and recoverable copper. After further improvement, six operators can complete the task of producing 5 tons of complex gold mud every year.
= = = = = = = = = = = = = < Mineral gold is mostly associated with other metals, including silver, platinum, zinc and other metals besides gold, which was called alloy gold before other metals were put forward. Mineral gold is produced in different mines and contains different other metals, so the fineness varies, generally between 5% and 9%.