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Oxidizing roasting process by blending high fluorine chlorine zinc oxide complex material

A high-fluorine chloride zinc oxide and oxidation roasting technology, which is applied in the field of oxidation roasting technology mixed with high-fluorine chloride zinc oxide miscellaneous materials, can solve the problems of low roasting intensity and high smoke and dust rate in fluidized fluidized furnaces, and achieve improved roasting intensity and production efficiency , Guarantee the effect of quality

Active Publication Date: 2012-07-04
HULUDAO ZINC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the zinc concentrate and the high-fluorine chloride zinc oxide miscellaneous material are mixed and added into the fluidized furnace, ignited, and at the same time, air is introduced to control the temperature and the excess air coefficient, so as to realize continuous roasting and solve the problems of low roasting intensity and Technical problems of high dust rate and high fluorine chlorine zinc oxide miscellaneous materials to remove fluorine and chlorine and recover zinc at the same time

Method used

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  • Oxidizing roasting process by blending high fluorine chlorine zinc oxide complex material
  • Oxidizing roasting process by blending high fluorine chlorine zinc oxide complex material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Ingredients: select zinc concentrate composition: Zn≥47%, Pb2 2 O<10%, As+Sb<0.45%.

[0048] The mixed high-fluorine chlorine zinc oxide miscellaneous material is steelmaking rotary hearth furnace dust, composition: Zn50%, Pb8.8%, Fe6.0%, S2.34%, SiO 2 0.69%, F0.35% and Cl3.8%, the blending amount is 7-10% of the zinc concentrate by mass percentage.

[0049] The composition of the mixture is: Zn47.19~47.27%, Pb1.51~1.71%, Fe9.64~9.74%, S27.5~28%, SiO 2 5.97-6.12%, F0.023-0.032%, C10.25-0.35%.

[0050] Roasting: It is added to the fluidized furnace through a disc feeder. The reaction process does not require additional heating, and the heat is provided by the heat released by the reaction of sulfide and oxygen. After high-temperature oxidation roasting in fluidized bed furnace, in addition to the normal removal of lead, cadmium and sulfur, zinc-containing miscellaneous materials are also processed to remove fluorine and chlorine. The total soot output rate is 15-16%, t...

Embodiment 2

[0052] Ingredients: select zinc concentrate Composition: Zn≥47%, Pb2 2 O<10%, As+Sb<0.45%.

[0053] The mixed high-fluorine chlorine zinc oxide miscellaneous material is steelmaking electric furnace dust, composition: Zn48.8%, Pb1.32%, Fe1.54%, S1%, SiO 2 1.86%, F0.57% and C13.21%, the blending amount is 7.4-9.4% of the mixture by mass percentage.

[0054] The composition of the mixture is: Zn 47.12-47.15%, Pb1.02-1.03%, Fe9.27-9.42%, S27.5-28%, SiO 2 6.1-6.18%, F0.039-0.049%, C10.22-0.28%.

[0055] Roasting process is as embodiment 1.

[0056] Effect: The total dust output rate is 15-16%, the electric dust output rate is 1%, and the baked sand contains 0.050% chlorine and 0.020% fluorine.

Embodiment 3

[0058] Ingredients: select zinc concentrate Composition: Zn≥47%, Pb2 2 O<10% and As+Sb<0.45%.

[0059] The mixed high-fluorine chlorine zinc oxide miscellaneous material is regenerated copper recovery dust, composition: Zn49.35%, Pb0.44%, Fe1.22%, S1%, F0.36% and C13.42%, blending amount 7.4-9.4% by mass percentage.

[0060] The composition of the mixture is: Zn47.16~47.20%, Pb0.95~0.96%, Fe9.25~9.40%, S27.5~28%, SiO 2 5.94-6.1%, F0.025-0.031%, C10.24-0.29%.

[0061] Roasting process is as embodiment 1.

[0062] Effect: The total dust output rate is 15-16%, the electric dust output rate is 1%, and the baked sand contains 0.050% chlorine and 0.020% fluorine.

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Abstract

The invention relates to an oxidizing roasting process by blending a high fluorine chlorine zinc oxide complex material. The process comprises the following steps: roasting under the conditions of controlling the proportioning process of mixed raw materials and the technical parameters of a fluidized bed furnace, roasting zinc ore concentrate and zinc-containing complex material into calcine, andremoving impurities of lead, cadmium, fluorine and chlorine and the like. In the method of the invention, the zinc ore concentrate is blended with the high fluorine chlorine zinc oxide complex material, and by adopting the measures of improving the effective height of the hearth of the fluidized bed furnace, increasing the bosh angle and controlling the temperature in the furnace and the operating gas speed, the purposes of removing sulphur, lead, cadmium, fluorine and chlorine from the zinc ore concentrate and the high fluorine chlorine zinc oxide complex material, improving the roasting intensity and reducing the dust yield are achieved. The yield is improved and the quality is ensured. The process is applicable to the technical field of recovery of ferrous metal metallurgy zinc.

Description

technical field [0001] The invention relates to a process for preparing zinc calcine by roasting zinc-containing materials in the technical field of nonferrous metal smelting, in particular to an oxidation roasting process for blending high-fluorine chloride zinc oxide miscellaneous materials. technical background [0002] To extract metal zinc from zinc sulfide concentrate, except for the oxygen pressure leaching-electrowinning process, other zinc smelting processes require fluidized roasting of zinc sulfide concentrate under high temperature conditions to obtain zinc calcine and remove sulfur at the same time and impurities such as lead and cadmium. [0003] Existing technologies and methods: [0004] 1. Low-temperature acidification and roasting treatment of zinc sulfide concentrate desulfurization technology [0005] The roasting temperature adopted in the fluidized roasting of the zinc hydrometallurgy process is 870-900 ° C, so that most of the zinc sulfide is convert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10C22B19/02
Inventor 郭天力未立清王丰华朱宏文万学武
Owner HULUDAO ZINC IND CO LTD
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