Method and system for treating sodium jarosite residue
A technology of yellow sodium iron vanadium and desulfurizer, which is applied in the chemical industry and can solve the problems of land occupation, environmental pollution, loss, etc.
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Embodiment 1
[0057] Using jarosite slag with 28% iron grade, 2.5% nickel grade and 10.5% sulfur grade as raw material, the fixed carbon content of the reduced coal is 75%, marl is used as desulfurizer, and its calcium oxide content is 52%. The raw coal is blended in according to the C / O ratio of 1.0, and the marl is blended in according to the Ca / S ratio of 1.0. The above materials are mixed evenly, pressed into pellets, dried and put into the reduction furnace. The temperature in the furnace is 1180°C, and the reduction time is 26min. The reduced product can be magnetically separated to obtain ferronickel particles, wherein the grade of nickel reaches 19%, the recovery rate can reach 95%, and the desulfurization rate is 97%.
Embodiment 2
[0059] Use jarosite slag with 23% iron grade, 3.8% nickel grade and 11.8% sulfur grade as raw material, the fixed carbon content of the reduced coal is 82%, the desulfurizer is a mixture of calcium carbide slag and salt mud, and the reduced coal is based on C / The O ratio is 0.6, and the mixture of calcium carbide slag and salt mud is mixed according to the Ca / S ratio of 1.2. The above materials are mixed evenly, pressed into pellets, dried and put into the reduction furnace. The temperature in the furnace is 1350 ° C, and the reduction time is 20min. The reduced product can be magnetically separated to obtain ferronickel particles, wherein the nickel grade reaches 30%, the recovery rate can reach 98%, and the desulfurization rate can reach 97.8%.
Embodiment 3
[0061] Using jarosite slag with iron grade of 25%, nickel grade of 3.0%, and sulfur grade of 8.2% as raw material, the fixed carbon content of the reduced coal is 66%, calcium carbonate slag is used as the desulfurizer, and the reduced coal is formulated according to the C / O ratio of 0.8 Add marl according to the Ca / S ratio of 0.8, mix the above materials evenly, press them into pellets, dry them and put them in the reduction furnace. The temperature in the furnace is 1450°C, and the reduction time is 15 minutes. The reduced product can be subjected to dry magnetic separation to obtain ferronickel particles, in which the grade of nickel reaches 25%, the recovery rate can reach 97%, and the desulfurization rate can reach 96.5%.
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