|
Non-ferrous metals usually refer to metals removing iron (sometimes to remove all metals other than manganese, and chromium) and iron-based alloys. Non-ferrous metals can be divided into four categories:
(1) Heavy metals: general density 4.5g/cm3 above, such as copper, lead, zinc, etc.;
(2) light metal: density (0.53 4.5g/cm3), chemically active, such as aluminum, magnesium, and so on.
(3) Precious Metals: Crustal content, difficult to extract higher prices, density, and chemical stability, such as gold, silver, platinum, etc.;
(4) rare metals: such as tungsten, molybdenum, germanium, lithium, lanthanum, uranium.
Rare metals of great significance in modern industry, sometimes they are from the non-ferrous metals division, into a separate class. Tied with ferrous metals, nonferrous metals
The other is not known as a colorless metal, but only three kinds of black metal black metal: iron, manganese and chromium.
The tensioning device is a belt conveyor important and indispensable part of it can to ensure sufficient tension of the belt conveyor drive roller separation point, to prevent the conveyor belt slipping, and the ability to compensate for the excessive operating conditions when the conveyor belt of plastic deformation, maintain normal operation of the conveyor of the required minimum tension force, thus ensuring the normal operation of the belt conveyor. The tensioning device performance of a direct impact on the performance of the whole of the belt conveyor, belt conveyor is particularly important.
Many of the current domestic industry is still extensive use of machinery and semi-automatic tensioning device, but because of the drawbacks of the two tensioning form in recent years, market demand is gradually tensioning device with hydraulic automatic control. From a marketing point of view of the tensioning device, the tensioning device market in China in 2011 achieved sales of 1.646 billion, an increase of 1.09 times compared with 2007. 2007-2011 market sales and sales of the tensioning device in China, and based on this growth rate, the value of equipment upgrade upgrading a number of factors considered to calculate the tensioning device in the next few years, China's market sales and sales the following table. With its high quality products such as Sand washer supplier?Vibrating feeder?Cement mill price?Henan Hongxing mining machinery Co.Ltd has ascended in the front rank of the world in the exporting of mining equipments.
Related Articles -
science, technology,
|
