A kind of preparation method of iron powder cold-pressed pellet composite binder
A technology for cold-pressed pellets and binders is applied in the field of preparation of composite binders for iron powder cold-pressed pellets. Healthy development, wide source of raw materials, and effect of reducing dosage
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Embodiment 1
[0015] ①Crush and sieve bentonite, fly ash, magnesium oxide, calcium carbonate, and gypsum respectively, and then crush and sieve the obtained coarse particles again, and the particle size reaches 100 mesh;
[0016] ② Add 15g of bentonite prepared above, 3.5g of rapid-hardening Portland cement, 1.5g of rapid-hardening sulfoaluminate cement, 3.0g of sodium carboxymethyl starch, and 3.0 grams of polyacrylamide into an iron cup with mechanical stirring. g, pregelatinized starch 5.0g, fly ash 2.0g, magnesium oxide 1.0g, calcium carbonate 1.0g, gypsum 1.0g, stir continuously for 15 minutes, stirring speed 150 r / min, make it mix evenly, get composite bond agent. Then add the obtained binder into the mixer, then add iron ore powder and stir quickly to make it evenly mixed; then pour the mixed material into the pelletizing machine and cold press it into balls. The prepared pellets were placed at room temperature for 5 hours, and the surface of the raw balls had hardened, and they cou...
Embodiment 2
[0018] ① Pulverize and sieve bentonite, fly ash, magnesium oxide, calcium carbonate and gypsum respectively, and then pulverize and sieve the obtained coarse particles again, and the particle size reaches 120 mesh;
[0019] ② Add 10g of prepared bentonite, 5.0g of rapid hardening Portland cement, 8.0g of sodium carboxymethyl starch, 1.0g of polyacrylamide, 6.0g of pregelatinized starch, 2.0g of fly ash, and magnesium oxide into the mixer in turn. 1.0g, calcium carbonate 1.0g, gypsum 1.0, cement superplasticizer 1.0g g, stirring continuously for 20 minutes at a stirring speed of 180 r / min, to mix evenly to obtain a composite binder. Then add the obtained composite binder into a mixer, then add iron ore powder and stir quickly to make it evenly mixed; then pour the mixed material into a pelletizing machine and cold press it into balls. The prepared pellets were placed at room temperature for 5 hours, and the surface of the raw balls had hardened, and they could be completely con...
Embodiment 3
[0021] ①Crush and sieve bentonite, fly ash, magnesium oxide, calcium carbonate, and gypsum respectively, and then crush and sieve the obtained coarse particles again, and the particle size reaches 100 mesh;
[0022] ②Add 13g of prepared bentonite, 5g of rapid-hardening portland cement, 1g of rapid-hardening sulphoaluminate cement, 6g of sodium carboxymethyl starch, 3g of polyacrylamide, 5g of pregelatinized starch, and fly ash into the mixer in turn. 2g, 1g of magnesium oxide, 1g of calcium carbonate, 1g of gypsum, and 0.5g of cement superplasticizer, stirring continuously for 15 minutes at a stirring speed of 160r / min to make them evenly mixed to obtain a composite binder. Then add the obtained composite binder into a mixer, then add iron ore powder and stir quickly to make it evenly mixed; then pour the mixed material into a pelletizing machine and cold press it into balls. After the prepared pellets were placed at room temperature for 5 hours, the surface of the raw balls h...
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