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  • Method for detecting the purity of gold precious metals(Part 3)
    Post time: Jul-13-2020

    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 ...Citește mai mult »

  • Method for detecting the purity of gold precious metals(Part 2)
    Post time: Jul-10-2020

    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...Citește mai mult »

  • Method for detecting the purity of gold precious metals(Part 1)
    Post time: Jul-07-2020

    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...Citește mai mult »

  • The principle of gold and silver ingot casting-melting furnace and crucible
    Post time: Jul-03-2020

      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...Citește mai mult »

  • About Precious metal recovery
    Post time: Jul-01-2020

                          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...Citește mai mult »

  • Gold prices hit a seven-year high
    Post time: Jun-30-2020

    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...Citește mai mult »

  • Acid and alkali refractories
    Post time: Jun-28-2020

    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...Citește mai mult »

  • The story behind The Dragon Boating Festival
    Post time: Jun-24-2020

    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...Citește mai mult »

  • Post time: Jun-22-2020

    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...Citește mai mult »

  • Post time: Jun-13-2018

    The Chinese lunar calendar divides the year into 24 solar terms. Grain in Ear, (Chinese: 芒种), the 9th solar term, begins on June 6 this year and ends on June 20. The arrival of Grain in Ear signifies the ripening of crops such as barley and wheat. It is also a busy period for farmers. The ...Citește mai mult »

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