Method for producing ferro-nickel alloy from red soil nickel ore
A technology of laterite nickel ore and nickel-iron alloy, which is applied in the field of nickel-iron alloy production, can solve the problems of high energy consumption, low nickel grade of nickel-iron alloy, large amount of slag, etc., and achieves the effects of large processing capacity, high recovery rate and low cost
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Embodiment 1
[0022] Such as figure 1 Shown, technological process of the present invention is:
[0023] The selected laterite ore composition is: nickel grade 0.95%, iron grade 39.7%; coal powder is selected as the reducing agent, and its composition is: fixed carbon 80.17%, ash content 12.34%, sulfur 0.65%; the selected binder is bentonite; The flux is limestone: the CaO content is about 50%. Laterite ore, coal powder, binder and flux are mixed in a ratio of 100:40:5:5.
[0024] First put the laterite nickel ore into the dryer for drying until the water content is 7%, then crush the dried laterite nickel ore to less than 3mm, then add reducing agent and binder to mix the mixture, and cool the mixture Pressed into bricks, without drying, directly stacked on the trolley, the bottom of the trolley is covered with a layer of coke powder, the thickness is 20mm, and then sent to the tunnel kiln for reduction, the reduction temperature is controlled at 1100 ℃, and the reduction time is 18 ...
Embodiment 2
[0027] Such as figure 1 Shown, technological process of the present invention is:
[0028] The selected laterite ore composition is: nickel grade 1.78%, iron grade 15.8%; coal powder is selected as the reducing agent, and its composition is: fixed carbon 79.13%, ash content 12.47%, sulfur 0.68%; the selected binder is bentonite; The flux is limestone: the CaO content is about 50%. Laterite ore, coal powder, binder and flux are mixed in a ratio of 100:35:4:8.
[0029] First put the laterite nickel ore into the dryer for drying, and then remove the dried laterite nickel ore to a water content of 8%, then crush the dried laterite nickel ore to less than 3mm, then add a reducing agent and a binder to mix the mixture, and cool the mixture Pressed into bricks, without drying, directly stacked on the trolley, the bottom of the trolley is covered with a layer of coke powder, the thickness is 20mm, and then sent to the tunnel kiln for reduction, the reduction temperature is contr...
Embodiment 3
[0032] Such as figure 1 Shown, technological process of the present invention is:
[0033] The selected laterite ore composition is: nickel grade 1.86%, iron grade 16.1%; coal powder is selected as the reducing agent, and its composition is: fixed carbon 80.51%, ash content 11.72%, sulfur 0.47%; the selected binder is bentonite; The flux is limestone: the CaO content is about 50%. Laterite ore, coal powder, binder and flux are mixed in a ratio of 100:25:3:6.
[0034] First put the laterite nickel ore into the dryer for drying until the water content is 7%, then crush the dried laterite nickel ore to less than 3mm, then add reducing agent and binder to mix the mixture, and cool the mixture Pressed into bricks, without drying, directly stacked on the trolley, the bottom of the trolley is covered with a layer of coke powder, the thickness is 20mm, and then sent to the tunnel kiln for reduction, the reduction temperature is controlled at 1250 ℃, and the reduction time is 20 ...
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Abstract
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