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The development of the mill has been in the past few decades. At present, the most popular and dominant Raymond mill in the world is derived from the Newell Company of the United States, accounting for nearly 70%. The earliest medium-speed mills can be traced back to the 1950s. The production and development of Raymond Mill is closely related to the development of the scrap industry. At first, it only deals with light and thin materials. With the deepening of understanding and the superiority of crushing and processing hard materials, Raymond Mills of various specifications The powder machine has been continuously developed, and the three-ring medium-speed mill has been born. It is also used in a wider range of applications, and can be equipped with appropriate conveyors and sorting equipment to easily form an ore crushing production line.
The development of the three-ring medium-speed mill in China was relatively late. In the 1950s, China really had a crusher. Therefore, most of China's crushing and screening equipment was introduced in the 1950s. Prior to the 1980s, our domestic mills were limited to handling medium-hard materials such as coal and limestone. It was not until the end of the 1980s that China developed a hard rock mill to fill the gap in domestic high-hardness mills. Therefore, Dawn Heavy Industry Technology has developed and produced a three-ring medium-speed mill on the basis of Raymond Mill.
The three-ring medium speed mill is also a kind of ore crushing machine. Its technology is a new crushing engineering technology developed along with modern high technology and new materials industry in recent years. It has become one of the most important deep processing technologies for industrial minerals and other raw materials, and the development of modern high-tech industries. It is of great significance. However, at present, there is still a certain gap between our domestic mills and foreign countries. Therefore, the future development direction of mills is mainly reflected in the following aspects:
First, it is necessary to improve the structure of the existing mill, improve the crushing capacity of the centering hard ore of the three-ring medium-speed mill and the convenience of equipment maintenance. The main focus is on the improvement of the hammer and rotor structure. The replacement and loading of the hammer; the structural optimization of the counter-rack (crushing cavity) improves the primary crushing rate and energy utilization of the ore.
Second, research and development of new plate hammer materials with high wear resistance and high toughness to improve the service life of the hammer and improve productivity.
Third, the application of modern mechatronics technology and modern control methods (such as hydraulic technology, electronic technology), continuously improve the automation of the three-ring medium-speed mill, reduce the labor intensity of workers, and increase productivity. For example, the application of modern computer-aided design optimizes the structural parameters of the counter-attack frame to improve the energy utilization rate and the primary crushing rate of the ore.
Fourth, in order to meet the needs of the market and customers, the three-ring medium-speed mill is being serialized and standardized.
Fifth, adhere to technological innovation, and gradually get rid of the single introduction and imitation of products.
Purple onions and yellow onions also have a big difference in taste. Purple onions have a lighter spicy taste and a slightly sweet taste. They can be eaten raw, but the yellow onions are particularly spicy. They cannot be eaten raw and are suitable for frying. Eat after making or making soup. In addition, the purple onion has relatively thick flesh and high juice content, while the yellow onion has very thin flesh quality and low juice content.
The development and future trend of the mill
Editor's note: The development of the mill has reached a certain level of maturity today. Although China's development is relatively late, the prospects are promising. This article introduces the development direction of the future mill. China Pharmaceutical Machinery Equipment Network reported.