Alkali-acid double-cycle process for treating brown iron type nickel laterite ore
A laterite nickel ore and double-cycle technology, which is applied in the field of non-ferrous metallurgy, can solve the problems of inability to comprehensively utilize valuable metals, discharge, and poor comprehensive utilization of laterite nickel ore, and achieve the effect of reducing adverse effects and improving grades
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Embodiment 1
[0032] The raw material laterite nickel ore comes from Indonesia, and its main element content is (weight%): Fe: 47.01%, Ni: 0.52%, Co: 0.039%, Mg: 0.32%, Cr: 2.21%, Al: 4.16%, Si: 2.21 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 80% of the total ore.
[0033] Take a certain amount of sodium hydroxide and laterite nickel ore according to the proportioning ratio of 0.65:1 of solid alkali ore, first make sodium hydroxide into an aqueous solution with a concentration of 40 (weight), and then mix it with laterite nickel ore in a kettle Wet mixing was carried out in the reactor by stirring, and the temperature was programmed to rise after mixing evenly, so that the reactor was first kept at 150°C for 2 hours, and then heated to 650°C at a rate of 5°C / min for 200 minutes of roasting reaction. The roasted material is discharged at high temperature, cooled and ground, washed with water three times, the washing temperature is 90°...
Embodiment 2
[0036] The raw material laterite nickel ore comes from Indonesia, and its main element content is (weight%): Fe: 47.01%, Ni: 0.52%, Co: 0.039%, Mg: 0.32%, Cr: 2.21%, Al: 4.16%, Si: 2.21 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 90% of the total ore.
[0037] According to the weight ratio of solid sodium hydroxide and the laterite nickel ore after grinding, the proportioning ratio of 1.5: 1 is taken by weighing sodium hydroxide and the laterite nickel ore after grinding; The aqueous solution, and then mixed with the ground laterite nickel ore in a tank reactor by stirring, and then dried after mixing evenly, and then carried out temperature programming, so that the tank reactor was first kept at 150 ° C for 2 hours to dry the mixture. Then, the temperature was raised to 800° C. at a rate of 5° C. / min for 120 minutes of roasting reaction to obtain a solid calcined material. The solid calcined material is discharged at r...
Embodiment 3
[0040] The raw material laterite nickel ore comes from the Philippines, and its main element content is (weight%): Fe: 52%, Ni: 1.05%, Co: 0.1%, Mg: 0.31%, Cr: 2.68%, Al: 1.68%, Si: 1.36 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 90% of the total ore.
[0041] Take by weighing sodium hydroxide and the laterite nickel ore after grinding according to the weight ratio of solid sodium hydroxide and the laterite nickel ore after grinding; The aqueous solution, and then mixed with the ground laterite nickel ore in the tank reactor by stirring, and after mixing evenly, the temperature program was raised, so that the tank reactor was first kept at 150 ° C for 2 hours to dry the mixture, and then 5 The temperature was raised to 400°C at a rate of °C / min for 200 minutes of roasting reaction to obtain a solid roasted material. The solid roasted material is discharged at high temperature, and the solid roasted material is ground a...
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