Industrial production method of cold-cured pellet used directly for iron and steel smelting

Industrial production method of cold-cured pellet used directly for iron and steel smelting

  • CN 1,158,903 A
  • Filed: 12/03/1996
  • Published: 09/10/1997
  • Est. Priority Date: 12/03/1996
  • Status: Abandoned Application
First Claim
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1. An industrial production method of cold bonded pellets for direct steel making and iron making is characterized in that:

  • 1) the cold bonded pellet comprises the following components;

    iron ore concentrate 64-77 wt% and grain size-200 mesh 65 wt%13-24 wt% of non-coking coal, 95% of which has a particle size of 0.3 mm or less10-18% of cement clinker with the grain size of less than 12 microns accounts for 90%The total of the above components is 100% (by weight)2) The pellet contains fixed carbon 11-20 wt%3) After the components are uniformly mixed, 5-10% of water is added into a disc pelletizer or a cylinder pelletizer, and the mixture is rolled and pelletized. Separating into 6-16mm green balls with smooth surface and no adhesion by rolling sieve, continuously feeding from the upper part of the comprehensive reaction bin in a wet state, and using the residual heat and CO in the industrial waste flue gas2Carrying out hydration and carbonation reaction of the pellets.4) The finished cold-bonded pellets continuously taken out from the lower part of the comprehensive reaction bin are dried and slightly carry residual heat, and after being continuously screened to remove particles and scraps smaller than 6mm, the finished cold-bonded pellets continuously and massively enter a steel plant bin or an iron-making blast furnace bin or a special finished product warehouse for standby through a related belt corridor.5) The whole production process of the cold bonded pellet is not only industrial scale and continuous production; and

    is cold, without any combustion pollution.

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