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Method for processing complex nickel raw material by utilizing flash smelting system

A flash smelting and complex technology, applied in the direction of rotary drum furnace, crucible furnace, furnace, etc., can solve the problems of incomplete treatment of acid flue gas, high content of valuable metals, low metal recovery rate, etc., and achieve eradication Insufficient acid production capacity, low valuable metal content, and high metal recovery

Inactive Publication Date: 2013-01-23
JINCHUAN GROUP LIMITED
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AI Technical Summary

Problems solved by technology

The raw material applicability of the traditional process is poor, the valuable metal content in the smelting waste slag is high, the metal recovery rate in the smelting process is low, the energy consumption is high, and the acid flue gas cannot be fully treated

Method used

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Examples

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Embodiment Construction

[0023] The method for processing complex nickel raw materials using a flash smelting system according to the present invention will be further described below through specific examples.

[0024] The nickel raw materials processed in this example are Ni: 8.60%, Cu: 4.80%, Fe: 36.00%, Co: 0.25%, S: 26.40%, CaO: 0.90%, MgO: 6.80%, SiO 2 : 7.00%.

[0025] The equipment in this embodiment includes: one drying kiln of Φ1.88×11m, one flash furnace of Φ6×6.4m, one 4000 kVA depleted electric furnace, one 5000 kVA depleted electric furnace, and three 86t horizontal converters , 1 set of φ2.7×6mm drying-type flux ball mill, 1 set of φ2.5×3.9m pulverized coal ball mill, 2122m 2 Concentrate drying electrostatic precipitator 2 sets, 4122m 2 Flash furnace electric dust collector 2 sets, 3983m 2 3 converter electric dust collectors, the flue gas treatment capacity is 50429m 3 1 set of depleted electric furnace electric dust collector per h.

[0026] The concrete method of this embodimen...

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Abstract

The invention provides a method for processing a complex nickel raw material by utilizing a flash smelting system. The method comprises steps as follows: (1) drying wet concentrates: dewatering and drying wet copper-nickel mixed concentrate containing 8-12% of water until the water content is less than 0.3%; (2) mixing materials: mixing dried concentrate with quartz powder and pulverized coal; (3) feeding into a furnace for reacting: uniformly mixing the mixed material with oxygen-enriched air, and feeding into a reaction column of a flash smelting furnace by virtue of a concentrate nozzle for smelting and reacting, and then transferring the produced low-nickel flow to the next process; (4) blowing in a converter; and (5) slowly cooling, and separating. The method provided by the invention has the adaptability to raw materials higher than that of conventional nickel smelting technology and is simple in smelting process; and furthermore, little valuable metal is contained in the waste smelting slag, high recovery rate of the metal in smelting is achieved, and low energy consumption is ensured.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy and relates to a method for processing complex nickel raw materials by using a flash smelting system. Background technique [0002] my country's nickel metallurgical production started late, and there was no independent and complete nickel metallurgical industry before 1959. Except for the recovery of a small amount of nickel (salt) from the copper electrolysis process, metal nickel and stainless steel (nickel is the main alloying element) are all dependent on imports . After nearly 50 years of rapid development, my country has become one of the world's largest nickel producers, with an annual output of more than 300,000 tons. [0003] Compared with other metal smelting of nickel mineral resources, the grade of the concentrate entering the nickel smelting system is much lower, and the composition of the gangue is complex, so the technical difficulty of nickel smelting is relatively ...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B15/00
Inventor 刘铸吴中生王仕博
Owner JINCHUAN GROUP LIMITED
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