According to the national development plan, building the resource-saving and environment-friendly society should adhere to the principle that both development and economizing are important but give economizing priority. Under the current environment, the demand for energy is more urgent. It is expected that in 2020 the total investment in new energy will be more than 3 trillion yuan with the launch and adjustment of the relevant policies, which will boom mine construction and grinding mill equipment market.

Continuous improved technology and diversified market demand promote the continuous development of the mining machinery industry in China. It has become the inevitable trend for manufacturing industry to transform from the production-oriented manufacturing to a service-oriented manufacturing; mining machinery industry will undergo a transformation, resulting in better and more comprehensive development.

At some cement factories, cement mill bearing is likely to be burned, which belongs to major accident. The main reasons for it are foreign materials entering into bearing or the poor lubrication system. In some cases, it can lead to damage to hollow shaft neck of bearing. Once burning occurred, it needs over ten hours or even a couple of days to repair.

Over 6185 million tonnes (Mt) of hard coal is currently produced worldwide and 1042 Mt of brown coal/lignite. The largest coal producing countries are not confined to one region - the top five hard coal producers are China, the USA, India, Australia and South Africa. Much of global coal production is used in the country in which it was produced; only around 15% of hard coal production is destined for the international coal market.

The roll crusher(jaw crusher) is compression type crusher, and it is made up of roller, bearing, adjusting device and driving device etc.
How does roll crusher adjust the output granularity?

With China's rapid economic rise and great progress in the advancement of technology, the use of sand production line equipment in various fields is increasing, and supporting equipment of new applications are innovated continuously, which plays an increasingly important role. After years of development, Henan Hongxing Mining Machinery Co.,Ltd.

Manufacturers who had pinned sales growth hopes on this year's economic recovery in China's construction equipment are now in trouble.
In recent years, China has attracted a Caterpillar and Komatsu and other foreign construction equipment manufacturer to invest in, but now China has started to reduce the infrastructure projects, leading to weak demand in the Chinese market for new equipment. Under the combined effect of the economic slowdown, government construction spending and lower interest rates and other factors, sales of construction equipment receives a hit.

Rotating dryer can be used for drying many kinds of materials and with convenient and reliable operation; therefore, it has been widely used.
The traditional cement rotating dryer:

In practical mining production, we often have the problems of quick-wear parts（cone crusher）. It affects equipment performance and production efficiency. It is a regularly work for mining machines maintenance. Should we really want to keep machines good condition, we have to learn daily repair at least.
At first, as we all know, we should protect machine from hitting or damage. Ensure clean of them and cannot make machine contact with chemical things.