disintegrator feeder Interview Questions and Answers

1. What is a disintegrator feeder?

   • Answer: A disintegrator feeder is a type of material handling equipment that combines the functions of size reduction (disintegration) and controlled feeding of materials into a subsequent process, such as a conveyor, grinder, or reactor. It's designed for handling relatively fragile or brittle materials.

2. What are the key components of a disintegrator feeder?

   • Answer: Key components typically include a rotating hammermill or similar disintegration mechanism, a feed hopper, an adjustable feed gate or screw, a discharge chute, and a drive system (motor and gearbox).

3. What types of materials are suitable for processing with a disintegrator feeder?

   • Answer: Brittle, friable materials such as coal, limestone, fertilizers, minerals, and certain types of agricultural products are well-suited. Materials that are excessively tough, fibrous, or sticky may not be ideal.

4. How does the disintegration process work in a disintegrator feeder?

   • Answer: The rotating hammers or other disintegration elements strike the material, causing it to break apart into smaller pieces. The centrifugal force then throws the reduced material towards the discharge chute.

5. What are the advantages of using a disintegrator feeder?

   • Answer: Advantages include controlled feeding rate, size reduction in a single unit, reduced material handling steps, and improved process efficiency.

6. What are some disadvantages of using a disintegrator feeder?

   • Answer: Disadvantages can include higher initial investment cost compared to simpler feeders, potential for dust generation, and the need for regular maintenance due to wear on the hammers and other components.

7. How is the feed rate of a disintegrator feeder controlled?

   • Answer: Feed rate is typically controlled by adjusting the opening of the feed gate, the speed of a screw feeder, or a combination of both. Some advanced systems use variable speed drives on the main motor to control the throughput.

8. What are the different types of disintegrator feeders available?

   • Answer: Types vary by the disintegration mechanism used, such as hammermill disintegrators, impactors, and attrition mills. They also differ in size, capacity, and construction materials.

9. How is the size of the processed material controlled?

   • Answer: The final size of the material is primarily controlled by the design of the disintegration mechanism (hammer size and speed, screen size if present), and the feed rate. Smaller feed rates generally lead to finer products.

10. What are the safety considerations when operating a disintegrator feeder?

    • Answer: Safety considerations include proper lockout/tagout procedures during maintenance, guarding of moving parts, personal protective equipment (PPE) such as hearing protection and safety glasses, and dust control measures.

11. How often should a disintegrator feeder be inspected?

    • Answer: Regular inspections should be conducted daily, focusing on wear and tear of hammers and other components. More extensive maintenance should follow a schedule defined by the manufacturer and operational conditions, potentially weekly or monthly.

12. What types of lubrication are used in disintegrator feeders?

    • Answer: The type of lubrication will depend on the specific components but generally includes grease for bearings and oil for gearboxes. The manufacturer's recommendations should always be followed.

13. How is the wear on the hammers monitored?

    • Answer: Wear can be monitored through regular visual inspections, measuring hammer length, and checking for excessive vibration or noise.

14. What are common maintenance procedures for a disintegrator feeder?

    • Answer: Common maintenance includes replacing worn hammers, lubricating bearings and gearboxes, checking and tightening bolts, inspecting screens (if present), and cleaning the machine.

15. How are the hammers replaced in a disintegrator feeder?

    • Answer: The method for hammer replacement varies depending on the design, but typically involves removing the rotor, carefully removing the worn hammers, and installing new ones ensuring proper alignment and tightness.

16. What are some troubleshooting techniques for a disintegrator feeder?

    • Answer: Troubleshooting involves systematically checking for blockages, verifying motor operation, inspecting for worn parts, checking lubrication levels, and examining the feed rate settings.

17. What are the common causes of excessive vibration in a disintegrator feeder?

    • Answer: Excessive vibration can be caused by worn bearings, imbalanced rotor, loose bolts, or improper alignment.

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