The Evolution of Raymond Grinding Mill: A Pictorial History
Throughout history, grinding mills have played a crucial role in the industrial and technological advancement of mankind. From the humble stone mills used by our ancestors to the modern-day machinery we see today, these mills have continuously evolved to meet the growing demands of various industries. One such mill that has stood the test of time and witnessed remarkable advancements is the Raymond grinding mill.
The Raymond grinding mill, also known as a Raymond Roller Mill, was invented in the early 20th century by Raymond Brothers, a small-scale coal mining company in the United States. The original design for this mill was patented in 1906 – a pioneering effort that significantly contributed to the industrial revolution of that era.
The early Raymond mills had some drawbacks on the product, such as:
1. The product has low fineness. The fineness of ordinary Raymond mill is generally below 500 mesh. These devices can only occupy the lower end powder application market. 2. High mechanical failure rate, noise, and vibration: in general, Raymond mill is running relatively stable machinery failure rate is very low, but inexplicable equipment vibrations and noises frequently occur. 3. The service life of Raymond mill's roller and grinding ring is short.
Secondly, Raymond mill and high-pressure suspension mill on a distinction, between the two, the main difference is that the high-pressure suspension mill in the grinding device is a suspended roller suspension spindle and the roller, roller and the material contact. Raymond mill is based on the suspension of the roller device, by the ore milling ring, and the roller and the roller tightly pressed on the grinding ring conduct thorough processing by the blade at the same time separated from the air to form a negative pressure operation process, the role of a high-pressure spring to provide a great grinding pressure.
Today, the Raymond grinding mill is still one of the most widely used grinding mills worldwide. With high initial cost and low maintenance costs, industrial vertical roller mills are increasingly being used for raw material and cement grinding. In this article, we analyze Raymond mill’s grinding principle and its five major advantages.
Firstly, we have to mention the narrower particle size of the final product in a vertical roller mill— as compared with that of a ball mill. Compared with a ball mill, the particle size of the vertical roller mill is finer. Although the cost of electricity is higher, compared with the ball mill, the downtime problem caused by the maintenance of the grinding roller and the grinding disc directly affects the production progress.
Secondly, the Raymond grinding mill uses the principle of material bed grinding, so the material has a stronger grinding effect on the ore, achieving the purpose of grinding. It is a kind of grinding equipment widely used in mines, cement plants, chemical plants, etc.
Thirdly, it is equipped with special dust collector, low dust emission concentration, which completely takes the dust problem of Raymond mill into consideration, continuous production without dust emission, the machine has little loss of equipment, small investment, and high profit.
Fourthly, during the running process of grinding mill, the main motor drives the main shaft and each turnplate of the impeller to rotate, and then the roller pin on the edge of the turnplate drives dozens of grinding rollers to roll in the grinding ring raceway. When the grinding mill keeps working, the under grinding materials will be fed into the space between rollers and ring for grinding.
Raymond grinding mill continues to develop and evolve, becoming more and more perfect. Its performance advantages are vast and it has been favored and sought after by various industries. The Raymond grinding mill is a durable and reliable modern grinding mill. It has been continuously updated and improved, and its structure is more reasonable, more efficient, and more environmentally friendly. As a result, it has become a typical representative of the grinding mill industry.
In conclusion, the Raymond grinding mill has witnessed a long history of development and growth. From its humble beginnings, it has evolved into a highly efficient, globally recognized grinding mill. With constant advancements, it continues to revolutionize the way industries grind their materials, setting new standards for efficiency, reliability, and performance.
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