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Fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method

A treatment method and technology of a boiling furnace, applied in the field of zinc smelting, can solve unsolved problems, and achieve the effects of reducing labor intensity and reducing the rate of smoke and dust

Pending Publication Date: 2021-11-23
新疆紫金有色金属有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above methods has solved the problems faced by fine-grained high-silicon and low-iron zinc concentrates in boiling roasting

Method used

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  • Fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method
  • Fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method
  • Fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of fine-grained high-silicon low-iron zinc concentrate fluidized furnace roasting treatment method, such as figure 1 As shown, the specific process is:

[0024] Feed the fine-grained high-silicon and low-iron zinc concentrate into the effective area of ​​109m through the throwing machine 2 In the fluidized bed furnace, the height of the fluidized bed layer in the fluidized bed furnace is 1m. By controlling the fan in front of the furnace and the combustion-supporting fan, the air excess coefficient is controlled to be 1.3, and the air-to-material ratio is 1800m 3 / t, the roasting temperature is controlled at 850°C, so that the zinc concentrate is oxidized and roasted at a low temperature in the fluidized bed; the product calcine is discharged from the overflow port of the fluidized bed furnace, and enters the calcination bin after being cooled by the cooling cylinder and ball milled by the ball mill. After the product dust and flue gas pass through the waste he...

Embodiment 2

[0031] This embodiment provides a fine-grained high-silicon and low-iron zinc concentrate fluidized furnace roasting treatment method, the specific process is:

[0032] Feed the fine-grained high-silicon and low-iron zinc concentrate into the effective area of ​​109m through the throwing machine 2 In the fluidized bed furnace, the fluidized bed layer height of the fluidized furnace is 1m. By controlling the fan in front of the furnace and the combustion-supporting fan, the air excess coefficient is controlled to be 1.2, and the air-to-material ratio is 1700m 3 / t, the roasting temperature is controlled at 900°C, so that the zinc concentrate is oxidized and roasted at a low temperature in the fluidized bed; the product calcine is discharged from the overflow port, and enters the calcine bin after being cooled by the cooling cylinder and ball milled by the ball mill. and flue gas pass through the waste heat boiler, vortex dust collector, and electric dust collection for waste h...

Embodiment 3

[0038] This embodiment provides a fine-grained high-silicon and low-iron zinc concentrate fluidized furnace roasting treatment method, the specific process is:

[0039] Feed the fine-grained high-silicon and low-iron zinc concentrate into the effective area of ​​109m through the throwing machine 2 In the fluidized bed furnace, the height of the fluidized layer is 1m. By controlling the fan in front of the furnace and the combustion-supporting fan, the air excess coefficient is controlled to be 1.1, and the air-to-material ratio is 1600m 3 / t, the roasting temperature is controlled at 920°C, so that the zinc concentrate is oxidized and roasted at a low temperature in the fluidized bed; the product calcine is discharged from the overflow port of the fluidized bed furnace, and enters the calcination bin after being cooled by the cooling cylinder and ball milled by the ball mill. The product smoke dust and flue gas pass through the waste heat boiler, vortex dust collector, and el...

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Abstract

The invention discloses a fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method. The roasting treatment method comprises the following steps of (1) feeding fine-fraction high-silicon low-iron zinc concentrate into a fluidized bed roaster through a thrower; (2) controlling roasting parameters of the fluidized bed roaster by controlling a fan in front of the roaster and a combustion fan, so that the zinc concentrate is subjected to low-temperature oxidizing roasting at the temperature of 850-920 DEG C on a fluidized bed layer, and products being roasted sand, smoke dust and flue gas; and (3) discharging the roasted sand from an overflow port of the fluidized bed roaster, cooling and ball-milling the roasted sand, then feeding the roasted sand into a roasted sand bin, enabling smoke dust and flue gas to sequentially pass through a waste heat boiler, vortex dust collection equipment and electric dust collection equipment for waste heat recovery and smoke dust collection, enabling the generated waste heat to enter a steam pocket, and enabling the collected smoke dust to enter the roasted sand bin. The content of soluble silicon in the roasted product can be effectively reduced, the smoke dust rate is effectively reduced, the burden of equipment such as the waste heat boiler, vortex dust collection and electric dust collection is reduced, and the labor intensity of workers is reduced.

Description

technical field [0001] The invention relates to the technical field of zinc smelting, in particular to a method for roasting a fine-grained high-silicon and low-iron zinc concentrate in a fluidized fluidized furnace. Background technique [0002] There are two methods of zinc smelting to treat zinc sulfide concentrate: fire method and wet method. No matter it is wet method or fire method, the first step needs to roast the zinc sulfide concentrate. Fluidized fluidized furnace is widely used in zinc concentrates because of its large heat capacity, uniform distribution of thermal field, small temperature difference in various parts of the furnace, fast reaction speed, high roasting intensity, simple operation, and high heat and mass transfer efficiency between solid and gas. of roasting. Among them, temperature, air flow characteristics, and physical and chemical properties of zinc concentrate have a great influence on roasting reaction products such as calcined sand, smoke an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/10C22B19/02
CPCC22B1/10C22B19/02
Inventor 宁时和陈杭衷水平杨旭生万学武张恒星赵玉文
Owner 新疆紫金有色金属有限公司
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