Method for preparing sinter by adding chromite into high-chromium type vanadium titano-magnetite
A technology of vanadium-titanium magnetite and chromite, which is applied in the field of ironmaking raw materials, can solve problems such as low yield, poor granulation performance, and high technical difficulty, so as to improve air permeability and firing rate, and reduce gas consumption. cost, liquidity-enhancing effect
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Embodiment 1
[0048] A method for preparing sintered ore by adding chromite to high-chromium vanadium-titanium magnetite, such as figure 1 As shown, the method includes the following steps:
[0049] 1. Mixing
[0050] The first stage: The sintering materials are 75kg of high-chromium vanadium-titanium magnetite, 2kg of chromite, 15kg of lime powder, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, and 5kg of returned ore. kg, coke and pulverized coal are used to adjust the amount of carbon, the amount of coke is 1kg, and the amount of pulverized coal is 1kg. Weigh the raw materials according to the above batching, put them into the mixer for ore mixing, utilize a sprayer to spray mist water in the mixture during the mixing process, and the amount of sprayed water accounts for 5.5% of the total weight of the above raw materials. Time 8min;
[0051] The second stage: Cover the mixer and stew for 10 minutes. After the stew is over, continue to mix for 10 minutes.
[0052] ...
Embodiment 2
[0069] A method for preparing sintered ore by adding chromite to high chromium type vanadium-titanium magnetite, the present embodiment is based on embodiment 1, and the specific operation steps are as follows:
[0070] 1. Mixing
[0071] The materials used for sintering are 55kg of high chromium vanadium-titanium magnetite, 15kg of chromite, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, 15kg of returned ore, 10kg of lime powder, 2kg of coke, and 2kg of pulverized coal. Weigh the raw materials according to the above ingredients, put them into the mixer for ore mixing, during the mixing process, spray mist water to account for 6.2% of the total weight of the raw materials, the mixing time is 12 minutes, and the mixer is covered and stewed for 10 minutes. Continue mixing for 12 minutes.
[0072] 2. Granulation
[0073] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to account fo...
Embodiment 3
[0089] This embodiment is on the basis of embodiment 1, concrete operation is as follows:
[0090] 1. Mixing
[0091] The materials used for sintering are 60kg of red grid high-chromium vanadium-titanium magnetite, 12kg of chromite, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, 10kg of returned ore, 12kg of lime powder, 2.5kg of coke, and 2.5kg of coal powder. . Weigh the raw materials according to the above ingredients, put them into the mixer and mix them. During the mixing process, spray mist water to account for 7.4% of the total weight of the raw materials. The mixing time is 15 minutes. The mixer is covered and stewed for 10 minutes. Continue mixing for 13 minutes.
[0092] 2. Granulation
[0093] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to account for 2.6% of the total weight of the raw materials, and granulate for 15 minutes.
[0094] 3. Discharge
[0095] Aft...
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