Roasting method for laterite-nickel ore pellets

[0033] Such as figure 1 Shown, a kind of roasting method of laterite nickel ore pellet, comprises the steps:

[0034] 1) Feed the pellets obtained by the pellet preparation system 01 into the grate machine 02 for preheating, the temperature is controlled to be less than 400°C, and the preheated pellets are sent into the pellets by the bucket elevator 03 and the chain conveyor 04 Retort furnace 05.

[0035] 2) Feed the preheated pellets into the indirect heating tank furnace 05 for composite roasting. The calcination temperature is controlled at 900-1100° C., and the calcination reaction time is 30-90 minutes.

[0036] 3) The calcined sand balls roasted by the pot furnace enter the water jacket cooling box 06 to cool down to less than 200°C, and then are discharged by the discharge machine 07, and are supplied to the subsequent beneficiation operation to select nickel concentrate.

[0037] Such as Figure 3 to Figure 6 As shown, the structure of the retort furnace 05 used in t

[0044] Such as figure 2 Shown, a kind of roasting method of laterite nickel ore pellet, comprises the steps:

[0045] 1) Feed the pellets obtained by the pellet preparation system 01 into the grate machine 02 for preheating, the temperature is controlled to be less than 400°C, and the preheated pellets are sent into the pellets by the bucket elevator 03 and the chain conveyor 04 Retort furnace 05.

[0046] 2) Feed the preheated pellets into the indirect heating tank furnace 05 for composite roasting, the roasting temperature is controlled at 950-1050°C, and the roasting reaction time is 30-60 minutes.

[0047] 3) The calcined sand balls roasted by the pot furnace enter the water jacket cooling box 06 to cool down to less than 200°C, and then are discharged by the discharge machine 07, and are supplied to the subsequent beneficiation operation to select nickel concentrate.

[0048] The structure of the retort furnace 05 used in this embodiment is the same as that of the retort