Method for preparing composite type iron ore pellet adhesive by utilizing landfill leachate

Active Publication Date: 2017-05-31
FUZHOU UNIVERSITY +1
7 Cites 6 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] With the development of our country's social economy and the acceleration of urbanization, the amount of urban garbage in our country has increased extremely rapidly. In the process of processing many urban domestic garbage, ...
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Abstract

The invention discloses a method for preparing a composite type iron ore pellet adhesive by utilizing a landfill leachate. A landfill leachate concentrated solution with the solid content being 30-40% is evenly mixed with a sodium hydroxide solution, and after the stirring reaction is conducted under the water-bath condition of 80-90 DEG C, a solution is cooled, and then a modified landfill leachate can be prepared; and the prepared modified landfill leachate is evenly mixed with cement and calcium oxide in proportion, and after spray drying, the composite type iron ore pellet adhesive is prepared. By means of the methods that the landfill leachate concentrated solution and sodium hydroxide are subjected to mixing modification, and then the composite type iron ore pellet adhesive is prepared by mixing the modified landfill leachate with the cement and the calcium oxide in proportion, the method is simple, and operation is practicable; and the adhesive is prepared from the landfill treatment leachate produced in the landfilling process, so that recycling of waste resources is achieved, and the method has great significance on sustainable development and utilization of energy sources.

Technology Topic

AdhesiveEnergy source +11

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  • Method for preparing composite type iron ore pellet adhesive by utilizing landfill leachate

Examples

  • Experimental program(9)
  • Effect test(1)

Example Embodiment

[0020] Example 1
[0021] A method for preparing composite iron ore pellet binder using garbage leachate:
[0022] Mix 100Kg of landfill leachate concentrate with a solid content of 30% and 6Kg of sodium hydroxide solution with a concentration of 3mol/L. After stirring and reacting in a water bath at 80°C for 0.5h, the solution is cooled. The modified landfill leachate can be prepared. Take 40 parts of the modified landfill leachate, 25 parts of cement and 6 parts of quicklime and mix them evenly, and then add them to the spray drying equipment, after spray drying at 160℃, that is A composite iron ore pellet binder can be prepared.
[0023] The composite iron ore pellet binder prepared in this embodiment was added to the iron concentrate at 2% of the mass of the iron ore concentrate to prepare iron ore pellets.

Example Embodiment

[0024] Example 2
[0025] A method for preparing composite iron ore pellet binder using garbage leachate:
[0026] Mix 100Kg of landfill leachate concentrate with 35% solid content and 10Kg of sodium hydroxide solution with a concentration of 3mol/L. After stirring and reacting in a water bath at 85°C for 1h, the solution is cooled. The modified landfill leachate can be prepared. Take 40 parts of the modified landfill leachate, 25 parts of cement, 6 parts of quicklime and mix them evenly, and then add them to the spray drying equipment, after spray drying at 180°C, you can The composite iron ore pellet binder is prepared.
[0027] The composite iron ore pellet binder prepared in this embodiment was added to the iron concentrate at 2% of the mass of the iron ore concentrate to prepare iron ore pellets.

Example Embodiment

[0028] Example 3
[0029] A method for preparing composite iron ore pellet binder using garbage leachate:
[0030] Mix 100Kg of landfill leachate concentrate with a solid content of 40% and 6Kg of sodium hydroxide solution with a concentration of 3mol/L. After stirring and reacting for 1.5h in a water bath at 90°C, the solution is cooled. The modified landfill leachate can be prepared. Take 50 parts of the modified landfill leachate, 30 parts of cement and 12 parts of quicklime to mix evenly, then add it to the spray drying equipment, and after spray drying at 200°C, that is A composite iron ore pellet binder can be prepared.
[0031] The composite iron ore pellet binder prepared in this embodiment was added to the iron concentrate at 2% of the mass of the iron ore concentrate to prepare iron ore pellets.

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