continuous process rotary drum tanner Interview Questions and Answers

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100 Interview Questions and Answers for Continuous Process Rotary Drum Tanner

  1. What is a continuous process rotary drum tanner?

    • Answer: A continuous process rotary drum tanner is an automated system that uses rotating drums to process hides and skins through various tanning stages, unlike batch processes which handle smaller quantities at a time. It offers higher efficiency and productivity.

  2. Describe the different stages in a continuous rotary drum tanning process.

    • Answer: Typical stages include pre-tanning (liming, unhairing, fleshing), pickling, tanning (using chrome, vegetable, or other tanning agents), retanning, fatliquoring, dyeing, and finishing. The exact sequence and specifics vary based on the desired leather type and the tannery's setup.

  3. What are the advantages of using a continuous rotary drum tanner over batch processes?

    • Answer: Continuous systems offer higher throughput, reduced labor costs, improved consistency in leather quality, better control over process parameters, and less reliance on manual handling, leading to increased efficiency and potentially lower environmental impact due to optimized chemical usage.

  4. What are some of the challenges associated with operating a continuous rotary drum tanner?

    • Answer: Challenges include high initial capital investment, complex automation requiring skilled operators and maintenance personnel, potential for system breakdowns causing significant production losses, and the need for precise control of process parameters to maintain consistent leather quality.

  5. Explain the role of drum speed and rotation in the tanning process.

    • Answer: Drum speed affects the mixing of hides and chemicals, influencing the evenness of tanning and penetration of tanning agents. Optimal speed is crucial; too slow can lead to uneven tanning, while too fast may damage the hides.

  6. How is the temperature controlled in a continuous rotary drum tanner?

    • Answer: Temperature control is typically achieved through jacketed drums with circulating heating/cooling fluids. Precise temperature monitoring and control systems are essential to ensure optimal tanning conditions and consistent product quality.

  7. What types of tanning agents are commonly used in continuous rotary drum systems?

    • Answer: Chrome tanning is prevalent due to its speed and efficiency. Vegetable tanning and other agents like zirconium or aluminum salts are also used, depending on the desired leather characteristics.

  8. How is the chemical concentration controlled in a continuous process?

    • Answer: Precise metering pumps and automated chemical dispensing systems are used to accurately control the addition of chemicals throughout the process. Monitoring systems ensure accurate dosages are maintained.

  9. What are the safety considerations when operating a continuous rotary drum tanner?

    • Answer: Safety concerns include working with hazardous chemicals (requiring PPE and proper ventilation), moving machinery (lockout/tagout procedures), potential for explosions (flammable materials), and risk of injuries from rotating drums.

  10. How is the quality of the finished leather assessed after the continuous tanning process?

    • Answer: Quality assessment involves physical inspections (checking for defects, uniformity, and thickness), chemical analysis (to ensure proper tanning and chemical fixation), and mechanical testing (determining strength, elongation, and other relevant properties).

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    • Answer: [Answer 11]

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