Adhesive for iron-ore pelletizing and preparing method
A technology for binder preparation and iron ore balls, which is applied in the field of binders, can solve the problems of decreased pellet strength, binder decomposition, poor thermal performance, etc., and achieves reduced additions, improved quality, and good bonding performance Effect
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[0009] A method for preparing a binder for iron ore pellets: 25-35% of sodium carboxymethyl starch, 5-8% of polyacrylamide, 1-5% of sodium humate, water-resistant putty powder 30-40%, 3-5% kaolin, 8-10% ferrous sulfate, and 5-10% sodium carbonate are finely ground and mixed, and the content of the finely ground particle size ≤0.074mm is ≥80%. The molecular weight of polyacrylamide is more than 3 million.
[0010] This embodiment has good bonding performance, strong thermal performance, reduced additive amount, no increase in cost, and no impurities.
[0011] Iron ore pellets are prepared with this binder, and the iron ore raw materials used are: 64.0-66.0wt% of TFe, 26.0-28.0wt% of FeO, 1.0-2.0wt% of CaO, 1.5-2.5wt% of MgO, SiO 2 3.5-5.5wt%, adding 0.3-0.5wt% binder, and under the same conditions and other binders for a comprehensive comparison. The comparison of pellet greening performance is shown in Table 1, and the comparison of pellet comprehensive performance is shown...
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