Iron extracting process of lead and zinc residues treated through rotary hearth furnace
A technology of lead-zinc slag and rotary hearth furnace, which is applied in the field of metallurgy, can solve the problems of environmental pollution, resource waste, and large land occupation, and achieve the effects of short process flow, high recovery rate, and comprehensive utilization
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[0024] Example 1 Rotary hearth furnace treatment of lead-zinc slag iron-raising process
[0025] The project processes 200,000 tons of lead-zinc slag (dry basis) annually, with a moisture content of 10%. The main components of lead-zinc slag are shown in Table 1:
[0026] Table 1 Chemical multi-element analysis of lead-zinc slag
[0027] TFeFe 2 O 3
[0028] Rotary hearth furnace is used for direct reduction smelting, which requires 5,000 tons of bentonite, 7,000 tons of liquid binder and 50,000 tons of coal powder every year.
[0029] 1) Ingredients-briquetting: take the lead-zinc slag, reducing agent and additives according to the proportions, mix them thoroughly, press them into agglomerates, and dry them at 200℃ to obtain dry agglomerates; the additives are bentonite and liquid binder , The reducing agent is pulverized coal, the weight percentage of solid carbon in pulverized coal is 60%, the amount of coal powder added is 25% of the weight of lead-zinc slag, and the amount o...
Example Embodiment
[0036] Example 2 Rotary hearth furnace treatment of lead-zinc slag iron-raising process
[0037] The project processes 200,000 tons of lead-zinc slag (dry basis) annually, with a moisture content of 10%. The main components of lead-zinc slag are shown in Table 4:
[0038] Table 4 Chemical multi-element analysis of lead-zinc slag
[0039] TFeFe 2 O 3
[0040] Rotary hearth furnace is used for direct reduction smelting, which requires 20,000 tons of bentonite, 4,000 tons of liquid binder and 30,000 tons of coal powder every year.
[0041] 1) Ingredients-briquetting: mix the lead-zinc slag, reducing agent and additives in proportions, mix them thoroughly, press them into agglomerates, and dry them at 30°C to obtain dry agglomerates; the additives are bentonite and liquid binder , The reducing agent is pulverized coal, the weight percentage of solid carbon in pulverized coal is 80%, the amount of coal powder added is 15% of the weight of lead-zinc slag, and the amount of bentonite ad...
Example Embodiment
[0048] Example 3 Rotary Hearth Furnace Treatment of Lead-Zinc Slag Iron Raising Process
[0049] The project processes 200,000 tons of lead-zinc slag (dry basis) annually, with a moisture content of 10%. The main components of lead-zinc slag are shown in Table 7:
[0050] Table 7 Chemical multi-element analysis of lead-zinc slag
[0051] TFeFe 2 O 3
[0052] Rotary hearth furnace is used for direct reduction smelting, which requires 8,000 tons of bentonite, 10,000 tons of liquid binder and 70,000 tons of coal powder every year.
[0053] 1) Ingredients-briquetting: take the lead-zinc slag, reducing agent and additives according to the proportions, mix them thoroughly, press them into agglomerates, and dry them at 115°C to obtain dry agglomerates; the additives are bentonite and liquid binder , The reducing agent is pulverized coal, the weight percentage of solid carbon in pulverized coal is 70%, the amount of coal powder added is 35% of the weight of lead-zinc slag, and the amount...
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