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Silver ingots are made according to standard GB/T4135-2002. Properties: silver-white metal, soft, good plasticity, and high conductivity. Density 10.5g/cm3; melting point 960.8°C. Product specifications: ingots weighing15-16kg. Main use: manufacturing of photosensitive materials and electrical equipment. A large amount of silver is also used in electroplating, medical devices, dental insertion and other applications. Silver and its alloys are used to make ornaments and coins.
Gold bullions are measured in ounce or gram. At present, the most common gold bullions are in 400 ounces (12.5 kg) around the world. Gold bullions are mainly used in international reserves, making of jewelry and decoration, and applications of industries and science and technology. With unique and unrivalled properties, gold is characterized by extremely high corrosion resistance and reliability; good electrical and thermal conductivity; a large effective cross section of nucleus for neutron capture; near 100%reflectivity to infrared rays; various catalytic properties in gold alloys; favorable properties for processing into ultra-thin gold foils, micron-level gold wires and gold powder; easy plating on the surface of other metals, pottery and glass; easy welding and forging under certain pressures; making of superconductors and organic gold. Due to such favorable properties, it is widely used in the most important modern high-tech industries, such as electronics, telecommunications, aerospace, chemical, medical and so on.
Sulfuric acid is one of the important products of the basic chemical industry. It is not only a raw material for many chemical products, but also widely used in other sectors of the national economy. Its applications keep expanding with increasing demand for it. In the chemical industry, it is mainly used to produce chemical fertilizers as well as inorganic salts, organic raw materials, plastics, synthetic materials, pigments, pesticides and dye intermediates, etc. In the national economy, it is applied in industries of textile, metallurgy, refinement of petroleum products, additives, pharmaceuticals, national defense industry, etc.
Zinc ingots are considered to be pure zinc, which, of course, contains impurities, but the purity zinc ingots should be at least 90%. Zinc ingots fall into four grades by their chemical composition: Zinc 99.995, Zinc 99.99, Zinc 99.95 , Zinc 99.5and Zinc 98.7. Zinc ingots are mainly used in die cast alloy, batteries, printing and dyeing, medicine, rubber, chemical engineering and many other industries. Alloys of Zinc and other metals are widely used in electroplating, coat spraying and other applications.