Process Flow

• 1

  Raw Material Metering and Conveying System

  The raw material conveying system is designed as a ground warehouse feeding system, with a quantitative feeding belt at the lower end of the ground warehouse for quantitative feeding. The material is lifted by a bucket and fed into a locked air feeder, where it is then fed into the mill.

• 2

  Grinding System

  The main machine of the grinding system adopts a vertical mill dedicated to mixing materials. There are independent lubrication stations and hydraulic stations. The ground material is selected by a powder selector and sent to an offline pulse bag filter for collection. A membrane waterproof and oil proof filter bag is used with high filtration accuracy, and the concentration of discharged dust depends on local environmental requirements. The entire grinding system operates under negative pressure. The fan motor adopts high-voltage variable frequency control, which can be finely adjusted, improve system output, and reduce fan energy consumption. Realize efficient and versatile use of one machine.

• 3

  Return System

  Vertical mills have the advantage of external slag discharge. When iron materials with high density and material fluctuation are ground excessively, they can be discharged from the outside of the mill through the external slag discharge system. The discharged materials fall into the belt conveyor, and the materials on the belt conveyor pass through the iron remover to remove the iron materials from the slag discharge, which are then manually processed. After removing iron, the material is sent into the external circulation bucket elevator, into the chute, and after being locked in the air, it is sent back into the mill for grinding.

• 4

  Hot Air System (Optional)

  The vertical mill grinding and drying adopts a closed-loop hot air system process, which reduces the external exhaust air volume and heat source energy consumption, and enables a part of the heat source to be recycled. The main equipment of the hot air system adopts kiln tail waste heat or coal-fired (or gas-fired) hot air stove to generate high-temperature flue gas at 800-900 ℃, which is mixed with cold air and circulating air to produce high-temperature gas at 250-350 ℃. It is sent into the mill to dry the materials, and the entire air path is automatically controlled under the control of the globe valve and the damper valve.

• 5

  Finished Product Storage and Transportation System

  The finished products collected by the pulse dust collector are collected by the screw conveyor and sent to the corresponding finished product silo by the bucket elevator.