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  • Smelting and classification of lead
    Smelting and classification of lead

    01. Lead smelting The main raw materials for lead smelting are lead sulfide concentrate and a small amount of block ore. There are two methods for smelting lead: pyrometallurgy and wet metallurgy. Currently, pyrometallurgy is the main method in the world, and wet metallurgy of lead is still in the experimental research stage. The pyrometallurgical lead smelting process basically adopts the sintering roasting blast furnace smelting process, accounting for 85-90% of the total lead production; Next is the reaction melting method, which can be equipped with chamber furnaces, short kilns, electric furnaces, or vortex furnaces; Precipitation melting is rarely used. The refining of lead mainly adopts fire refining, followed by electrolytic refining, but due to customary reasons, electrolytic refining is not widely used in China. For difficult to separate sulfide lead zinc mixed concentrates, the closed blast furnace smelting method that simultaneously produces lead and zinc is generally used for processing. For the extremely difficult to separate mixed ore of lead and zinc oxide, a unique treatment method has been developed in China through long-term research, which involves using the raw ore or its enriched products of the mixed ore of lead and zinc oxide, sintering or pelletizing them, and melting them in a blast furnace to obtain coarse lead and molten slag containing lead and zinc. The slag is further fumigated in a fuming furnace to obtain zinc oxide products, and electrolytic zinc is obtained through wet zinc smelting. In addition, zinc oxide products can also be directly fumigated using a rotary kiln.

    2023-09-04

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  • The Use of Lead and Zinc
    The Use of Lead and Zinc

    Lead and zinc are widely used in fields such as electrical industry, mechanical industry, military industry, metallurgical industry, chemical industry, light industry, and pharmaceutical industry. In addition, lead metal has many uses in sectors such as the nuclear industry and petroleum industry. More than 80% of the world's lead is used to produce lead-acid batteries.

    2023-09-01

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  • Battery dismantling machines
    Battery dismantling machines

    Battery dismantling machines Battery dismantling machines (battery dismantling machines, battery dismantling machines) easily disassemble waste batteries. If electric vehicle batteries and car batteries are directly disposed of, they pose a significant risk and require centralized recycling for harmless treatment. Therefore, we will use our company's waste battery dismantling machine. The battery car battery dismantling machine equipment uses manual feeding to push waste batteries into the body. The propulsion system pushes the batteries into the position to be cut, and the crank drives the cutting blade to accurately cut off the waste battery cover. The cutting blade can be adjusted, and the propulsion system pushes the next battery forward again.

    2023-08-31

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  • Detailed explanation of copper process flow
    Detailed explanation of copper process flow

    The smelting methods for producing electrolytic copper from copper concentrate in the world are divided into two categories: pyrometallurgical and wet smelting. At present, over 80% of the refined copper production is produced by pyrometallurgy, and about 20% of the refined copper is produced by hydrometallurgy. The detailed information is as follows.

    2023-08-28

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  • The Working Principle of a Rotary Furnace
    The Working Principle of a Rotary Furnace

    A rotary furnace is a barrel-shaped instrument that is rotated around its axis when performing heat treatment. These instruments are tilted slightly to allow the sample under heat treatment to be passed from one end of the barrel to the other. This sample transfer occurs as the rotary furnace rotates, and this rotation can also induce some mixing or stirring of the sample. When the rotary furnace is in operation, hot gases pass through the chamber to perform the heat treatment. Generally, the hot gases pass through in the opposite direction than the sample, but depending on the application requirements they can also pass through in the same direction.

    2023-08-24

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  • How to distinguish between gray cast iron and cast steel?
    How to distinguish between gray cast iron and cast steel?

    How to distinguish between gray cast iron and cast steel? Gray cast iron carbon mainly crystallizes into graphite and exists in the form of flakes in cast iron, with dark gray fracture surface, making it a common cast iron component. The chemical composition of gray cast iron is generally 2.6%~3.6% C, 1.2%~3.0% Si, 0.4%~1.2% Mn, ≤ 0.3% P, 0.15% S. Cast steel is an important metal structural material with excellent comprehensive mechanical and physical and chemical properties. Compared with cast iron, cast steel has higher strength, plasticity, toughness, and good weldability. If you are referring to these two results, you can use a file to judge them based on their different hardness. You can first find a standard gray cast iron component and then use the same new file to file on the surface of both components. If it feels like the hardness of two pieces is the same, it is judged to be gray cast iron; If the file is judged to be slipping or noticeably harder than standard gray cast iron parts, it is judged to be cast steel.

    2023-08-16

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