In cement production, vertical grinding mill shows its remarkable advantages and features, which is why vertical grinding mill draw more and more attentions of investors in the world. Vertical mill integrates crushing, grinding, drying, classifying, elevator into one set, not only space saving but also reduce the investment cost. Here, we mainly introduce development history of vertical grinding mill.
Vertical roller mill is also called vertical grinding mill, roller mill and vertical roller mill. The first vertical mill was invented in the 1920s in Germany while the first vertical mill used for cement production appeared in 1935 in Germany. After many years’ application in the European cement factory, vertical mill started to get adopted in the USA and Canada. At that time, vertical mill got popular in Europe, USA and Canada was because the fuel cost and electricity expense was relatively high. It was exactly because of its high electricity expense, the USA paid more attention to vertical mill.
The first vertical mill put into operation in the USA was in the year 1973. Later, Japan, Egypt, Mexico, New Zealand, Argentina, Congo and some other countries all adopted vertical mill. At the end of last century, the economy of Southeast Asia developed rapidly, which also brought the remarkable growth of cement market. Many international companies started to invest in Southeast Asia, leading to the appearance of many large scaled cement production plants. At the same time, vertical mill got wide application in Southeast Asia area.
The technology breakthrough of vertical mill started from the 1960s. From then, vertical mill got optimized and upsizing. After being used for grinding raw material in cement industry in Europe, America and Asia, vertical mill got rapid development in the 1970s. Large scaled vertical mill with capacity 500t/h even appeared at that time. Entering the 1990s, new breakthrough appeared for the international vertical milling technology. It optimized the structure and producing process, ensuring the application of extra-large scaled vertical mill.
The application of vertical mill in China first started at the end of 1940s, using for raw material grinding in while cement factory. Since 1950s, some small cement factories started to adopt small scaled vertical mill to grind raw material, some even use vertical mill to grind coal in wet cement factory. Later, manufacturers kept on researching and optimizing vertical mill.
Throughout the application and development of vertical mill in China and abroad, vertical mill is developing into large and extra-large scale, in order to meet the requirements of dry and went cement production line.