The long journey of Raymond roller mill in China

In China, the pestle and mortar, a cylindrical grinding tool, appeared more than 2,000 years before Christ. The mortar and pestle further evolved into the foot of 200 ~ 100 BC. These tools use the lever principle and initially have the rudiment of Raymond roller mill, but their pulverization is still intermittent.

 

The Raymond roller mill, which adopted the continuous grinding action early, was invented by the public transport class in the fourth century b.c. After 200 years, the Chinese du yu et al. developed hydro-powered hydro-mill, hydro-mill, and hydro-rotary mill based on treadmills and animal power mills, to raise the production efficiency to a new level. In addition to grain processing, these machines are also extended to other material grinding operations.

 

The modern Raymond roller mill was created successively after the steam engine and motor and other power machines were gradually perfected and popularized. In 1806, a roller Raymond roller mill driven by steam engine appeared. In 1858, Blake in the United States invented the jaw type Raymond roller mill for crushing rocks. In 1878, Raymond roller mill was developed in the United States with continuous crushing action, and its production efficiency was higher than that of the jaw type Raymond roller mill with intermittent crushing action. In 1895, William invented the impact Raymond roller mill with lower energy consumption in the United States.

 

At the same time, pulverized mill machinery also had the corresponding development, in the early 19th century appeared widely used ball mill; In 1870 based on the ball mill, developed the rod mill with uniform grain size; In 1908, a self-grinding machine without grinding medium was created. From the 1930s to the 1950s, the United States and Germany successively developed the bowl mill, roller disc mill and other vertical speed coal mills.

 

With the development of science and technology, Raymond roller mill has made considerable progress. Especially after entering the 1990s, the production and sales volume of Raymond roller mill increased rapidly, and the number of enterprises involved in the production of Raymond roller mill increased constantly, making the number of manufacturers of Raymond roller mill more than 10,000. It is able to produce series of products with complete specifications such as 0.5~30t vibration Raymond roller mill, 4~24t static roller mill and 16~30t tire Raymond roller mill, basically forming a complete manufacturing system of Raymond roller mill that can be independently developed and produced, and the gap between its technical level and international level is gradually narrowing. Such a situation of high-speed growth is bound to push the Raymond roller mill machinery accessory industry to a new development period.

 

There are five main methods to crush solid materials by mechanical means, namely extrusion, bending, splitting, grinding and impact. The first one USES static forces, and the second one USES kinetic energy. In most Raymond roller mill machines, materials are usually crushed under the action of two or more crushing methods. For example, in the turning Raymond roller mill, extrusion, splitting and bending are mainly applied. In ball mill, impact and grinding are mainly used.