-
Bullion Blocks Cupellation is the last and crucial stage in fire assay process.so,the quality of cupel is very Important .Refractoriness: 1350 ºC (ash blowing temperature is generally not more than 960ºC).Features:1. Multiple samples can be obtained at a time, greatly improvi...Read more »
-
Gravimetric method The gravimetric method refers to other chemical gravimetric methods besides the fire assay method, such as chemical reduction method and precipitation method.The principle is that the sample is decomposed by one or more reagents and filtered to remove insoluble impurities. The ...Read more »
-
Density method The advantages of the digital display water specific gravity gold measuring instrument are: no calculation, no need to make additional jigs such as hanging wires, fast analysis speed, no damage to the sample, and the machine has a temperature compensation function, which can avoid...Read more »
-
In order to ensure the hardness, gloss and beauty of jewelry, the raw material of gold jewelry is not a single pure metal, but an alloy body with gold as the main material.At present, China's jewelry industry compulsory standard 08 11887-2008 stipulates that gold jewelry can be roughly divide...Read more »
-
The furnace that melts gold and silver generally adopts a round hearth furnace. The fuel is mostly gas and diesel. Or use the usual coke stove, gas or diesel stove, mostly made of magnesium brick or refractory clay brick, the size of the furnace is mainly determined by the size of the cruc...Read more »
-
About Precious metal recovery Precious metal resources are scarce, and mineral resources are non-renewable resources. Therefore, the recovery and recovery of precious metal secondary resources is very meaning...Read more »
-
Gold prices hit a seven-year high The international spot gold price continued to rise after standing at 1,600 US dollars/ounce , hitting a high of 1612.9 US dollars/ounce in the past seven years. Gold prices continue to rise in addition to being driven by the risk aversion sentiment of the new co...Read more »
-
Acid and alkali refractories Generally refers to inorganic non-metallic materials with refractoriness above 1580℃. It includes natural ore and various products made by a certain process according to a certain purpose. It has certain high-temperature mechanical properties and good volume stability...Read more »
-
This June 25th, All Chinese people will enjoy the Traditional Dragon Boating Festival as boats, beers, and zongzi draw thousands to back own hometown. Many of us use this public holiday as an excuse to reunite with family and catch some dragon boat races, but do yo...Read more »
-
How to allocate commodity assets under the COVID-19 ？ Looking ahead, gold still has sufficient upside momentum after a short break Gold assets have obvious advantages In addition to the above characteristics, gold assets are also regarded as a special commodity because of their curre...Read more »
