A kind of high-efficiency composite bentonite for pelletizing
A bentonite and high-efficiency technology, applied in the field of high-efficiency composite bentonite for pellets, can solve the problems of reduced iron content in pellets, impact on blast furnace output and coke ratio, and reduced reducibility of pellets. Metallurgical properties, strong bonding effect
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Embodiment 1
[0027] This embodiment provides a high-efficiency composite bentonite for pellets, which is composed of the following components in parts by weight: 60 parts of bentonite, 25 parts of organic cellulose, 10 parts of sodium carbonate, 12 parts of magnesium oxide, 4 parts of boron trioxide, 11 parts of high temperature explosion-proof agent.
[0028] The main chemical component in bentonite is: SiO 2 52%, Al 2 O 3 14.7%, CaO 1.45%, MgO2.41%.
[0029] The compound bentonite is mixed into the iron ore in the proportion of 1.1:100 parts by weight. In the iron concentrate, the bow magnetic concentrate accounts for 70%, and the bow float concentrate accounts for 30%. After pelletizing by the disc pelletizer, the test The drop strength of the green ball was measured 7 times, the compressive strength was 14 Newtons, and the burst temperature was greater than 450°C.
Embodiment 2
[0031] This embodiment provides a high-efficiency composite bentonite for pellets, which is composed of the following components in parts by weight: 80 parts of bentonite, 15 parts of organic cellulose, 7 parts of sodium carbonate, 12 parts of magnesium oxide, 5 parts of boron trioxide, 8 parts of high temperature explosion-proof agent.
[0032] The main chemical component in bentonite is: SiO 2 55%, Al 2 O 3 14%, CaO 1.5%, MgO 2.4%.
[0033] The compound bentonite is mixed into the iron ore in the proportion of 1.1:100 parts by weight. In the iron concentrate, the bow magnetic concentrate accounts for 70%, and the bow float concentrate accounts for 30%. After pelletizing by the disc pelletizer, the test The measured green ball drop strength was 7.5 times, the compressive strength was 13.8 Newton, and the burst temperature was greater than 500°C.
Embodiment 3
[0035] This embodiment provides a high-efficiency composite bentonite for pellets, which is composed of the following components in parts by weight: 80 parts of bentonite, 20 parts of organic cellulose, 10 parts of sodium carbonate, 14 parts of magnesium oxide, 5 parts of boron trioxide, 5 parts of high temperature explosion-proof agent.
[0036] The main chemical component in bentonite is: SiO 2 62%, Al 2 O 3 12.3%, CaO 1.55%, MgO2.4%.
[0037] The compound bentonite is mixed into the iron ore in the proportion of 1.1:100 parts by weight. In the iron concentrate, the bow magnetic concentrate accounts for 70%, and the bow float concentrate accounts for 30%. After pelletizing by the disc pelletizer, the test The measured green ball drop strength was 6.8 times, the compressive strength was 15 Newtons, and the burst temperature was greater than 450°C.
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