Vertical stirred mills are a fine grinding equipment that covers advantages of low rotation speed, high reliability and long life cycle. The significant advantages that the vertical stirred mills have over the ball mills are smaller size, less auxiliary equipment required, more simple system and more options of processing methods. Powder flow behaves continuously in the stirred mill, and it can be operated in both open- and closed-circuit operation.
Vertical stirred mills are also characterized by low noise, vibration and heat that are generated. The grinding media moves orderly in the vertically stirred media mill thereby resulting in more efficiency on grinding performance and much less power consumption. Since it is operated with wet grinding method, the vertical stirred mill does not require any cooling system due to the low speed operation.
In addition, vertical stirred mill features a small footprint without any external rotating parts. The helical agitator achieves the force balance, enabling the foundation to bear only the combined forces of mill, slurry and grinding media. This simple foundation contributes in a short installation period.

Selection

Offering mining concentrator plants with different options of complete sets of equipment:
SAG mill (semi-autogenous mill) + ball mill + vertical stirred mill
High pressure grinding roll + ball mill + vertical stirred mill
High pressure grinding roll + vertical stirred mill
SAG mill (semi-autogenous mill) + vertical stirred mill

Providing the best solution of vertical stirred mill selection through minerals testing, process simulation and optimization

Vertical stirred mill test

Levin test

Bond work index test

JKSimMet simulation software

Simulation

With finite element analysis modeling, simulation analysis of coupling behavior between particle and fluid is carried out to optimize equipment operating parameters thereby increasing grinding efficiency.

Strength

Finite element analysis is employed for strength calculation of helical agitator, transmission shaft, barrel and upper body to identify the optimal structure, and seismic analysis is performed to ensure the reliability of the stirred mill.

Transmission

Three transmission modes are available according to the motor power:
Direct starting with squirrel cage motor
Variable frequency starting with VFD
Liquid resistance soft starting with wound rotor motor

Auxiliary equipment

Our vertical stirred mill can be configured with helical path unit, jacking system, spiral conveyor, hydraulic wrench, grinding media adding unit, etc.

Control

PLC system is adopted to achieve low-pressure control and system protection. Monitoring system is used to visually inform the operator of the system status including temperature, pressure, flow rate, pressure difference and vibration rate via touc screen display.

Notes: The above table is based on that 60 percent of feed particles are in minus 200-mesh size, the grind fineness of 80 percent is minus 400-mesh size.

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  Manufacturing

  Casting and Forging Capacity
  We have four production lines that have the capacity to produce large steel castings, large high-value forgings, large annular parts and large non-ferrous metal parts respectively.

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  Service

  Lifetime service
  With state-of-the-art technology and rich experience, CITIC HIC works through each critical step to individualize the optimal process and performance as per customer needs. Our lifetime service covers equipment installation, testing, maintenance, refurbishing, remote monitoring & diagnosis, upgrading & retrofitting, and performance guarantee.

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