Molybdenum concentrate self-heating roasting method and device thereof

Molybdenum concentrate self-heating roasting method and device thereof

  • CN 101,921,908 B
  • Filed: 07/21/2010
  • Issued: 06/27/2012
  • Est. Priority Date: 07/21/2010
  • Status: Active Grant
First Claim
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1. molybdenum concentrate self-heating roasting method;

  • It is characterized in that;

    utilize the rotary kiln baking concentrated molybdenum ore that has kiln body heat-exchanger rig with the manufacture molybdenum oxide;

    The air that roasting process utilizes the preheating of calcining molybdenum ore concentrate reaction liberated heat to be got into by kiln body heat-exchanger rig through being arranged on gas blower (5) on the kiln body through the heat-exchanger rig that rotary kiln is provided with, provides natural air;

    Utilize natural air that heat exchange is carried out in the material main reaction high-temperature zone in rotary kiln stage casing;

    Air after the heat exchange is infeeded in the rotary kiln by the discharge end of kiln hood, with concentrated molybdenum ore generation roasting reaction, is the oxidizing roasting supplemental oxidant of concentrated molybdenum ore;

    And the material additional heat of taking off residual sulphur district for the rotary kiln back segment, reduce the temperature of reaction high-temperature zone, rotary kiln stage casing;

    The volume(tric)fraction of keeping oxygen in the kiln atmosphere is 8~

    18%, and negative pressure in the control rotary kiln, and keeping the interior gas flow rate of kiln is 10~

    20m/s;

    The calcining molybdenum ore concentrate process that opens behind the stove need not be accomplished under the state of outside heat supply fully.

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