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SHANGHAI ZENITH star product MTW series Euro-type grinding mill must be familiar to many customers in the chemical, energy, mineral and powder processing industry. Because of its high efficiency, low investment, low energy assumption, small land covering, MTW series grinding mill has became the leading powder grinding equipment in domestic and foreign market. What’s more, two distinct grinding systems highlight the MTW series Euro-type grinding mill.

To satisfy different requirements of different clients, MTW series Euro-type grinding mill was designed with two different powder grinding systems, open circuit grinding system and closed circuit grinding system.

Closed Circuit Grinding System:

1. Working Principle

The big stones will be crushed into the required particle size aggregates by crusher at first, then the crushed aggregates will be conveyed to storage hopper by bucket elevator, next the aggregates will be steadily fed by vibrating feeder to the mill to grind; The powder after grinding will be ascending, along with the “ blower” airflow, to the classifier to classify, then the qualified fine powder will be forced into ⑧the cyclone powder collector and discharged from the lower discharge valve as finished products; The airflow flows to the blower through the return duct on the upper of the cyclone powder collector, thus the entire airflow system will be recycling in a closed circuit under the alternating pressure condition.As the increase of the heat within the airflow system and the entrance of the outside gas, and in order to balance the airflow system, there is equipped with an air exhausting duct at the exit of the blower to discharge the excess gas to the dust collector to filter. Therefore, the final discharged gas is clean and the production process is environmental friendly.

2. Advantages: simple working procedures, less equipment, easy operation, low foundation investment.

Open Circuit Grinding System:

1、Working principle

The big stones will be crushed into the required particle size aggregates by crusher at first, then the crushed aggregates will be conveyed to storage hopper by bucket elevator, next the aggregates will be steadily fed by vibrating feeder to the mill to grind; The powder after grinding will be lift to the classifier along with the “ blower” airflow , then the qualified fine powder will be forced into the pulse dust collector and discharged from the spiral conveyor as finished products. Meanwhile, the clean air filtered by the pulse dust collector will be discharged with the blower. The entire open-circuit grinding system is operated under the negative pressure, thus there is no dust leakage.

2. Advantages:

A. Qualified fine powder will be classified timely.

B. Small fluctuation and easier adjustment on powder fineness

C. Low temperature for the final produced powder because of big material throughout capacity and timely classification of the qualified fine powder.

MTW Euro-type grinding mill at working site：

As the top one of MTW series Euro-type grinding mill with the biggest capacity, MTW215 has played an important role in many powder processing working sites. The 4 sets MTW215 grinding mills sold to Shandong before has finished commissioning and made significant contribution to the transformation and upgrading of local coal industry.

图：MTW215 GRINDING MILLS WORKING SITE IN SHANDONG