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A method for improving the roasting method of electric zinc waste slag

A technology of waste slag and electro-zinc, applied in the direction of improving process efficiency, etc., can solve the problems of high production cost, complex inlaying relationship, low recovery rate of electro-zinc process, etc., and achieve the effect of saving cost and reducing the utilization rate of coal.

Active Publication Date: 2020-01-14
成都盛威兴科新材料研究院合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively low grade of the ore, the complex composition and embedded distribution of the ore, when the ore is directly put into the smelting process, the production cost is relatively high, and the recovery rate of the electric zinc process is low, so it is very necessary to carry out the improvement of the zinc oxide roasting method

Method used

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  • A method for improving the roasting method of electric zinc waste slag
  • A method for improving the roasting method of electric zinc waste slag
  • A method for improving the roasting method of electric zinc waste slag

Examples

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Effect test

Embodiment 1

[0026] This embodiment provides a method for improving the roasting method of electrolytic zinc waste slag, including:

[0027] (1) When opening the kiln, control the kiln speed: when the temperature in the kiln is 90°C, control the kiln speed to 0.4r / 4h; when the temperature in the kiln is 180°C, control the kiln speed to 0.4r / h; When the temperature is 450°C, control the kiln speed to 0.8r / 300s; when the temperature inside the kiln is 610°C, start to put in neutralized slag;

[0028] (2) After the neutralization slag is fed, the control system operates: the kiln speed is 1r / 60s; the blast volume is 50m 3 / min; kiln tail temperature is 550°C; kiln tail negative pressure is ±50Pa; surface cooler inlet temperature is 350°C; surface cooler outlet temperature is 120°C; dust collector inlet temperature is 130°C; roasting temperature is 750°C ; Vulcanization time is 16h.

Embodiment 2

[0030] This embodiment provides a method for improving the roasting method of electrolytic zinc waste slag, including:

[0031] (1) When opening the kiln, control the kiln speed: when the temperature in the kiln is 80°C, control the kiln speed to 0.6r / 4h; when the temperature in the kiln is 150°C, control the kiln speed to 0.6r / h; When the temperature is 500°C, control the kiln speed to 1.2r / 300s; when the temperature inside the kiln is 620°C, start to put in neutralized slag;

[0032] (2) After the neutralization slag is fed, the control system operates: the kiln speed is 1r / 180s; the blast volume is 60m 3 / min; kiln tail temperature is 650°C; kiln tail negative pressure is ±50Pa; surface cooler inlet temperature is 500°C; surface cooler outlet temperature is 140°C; dust collector inlet temperature is 150°C; roasting temperature is 900°C ; Vulcanization time is 24h.

Embodiment 3

[0034] This embodiment provides a method for improving the roasting method of electrolytic zinc waste slag, including:

[0035] (1) When opening the kiln, control the kiln speed: when the temperature in the kiln is 120°C, control the kiln speed to 0.5r / 4h; when the temperature in the kiln is 140°C, control the kiln speed to 0.5r / h; When the temperature is 480°C, control the kiln speed to 1r / 300s; when the temperature in the kiln is 605°C, start to put in neutralized slag;

[0036] (2) After the neutralization slag is fed, the control system operates: the kiln speed is 1r / 70s; the blast volume is 30m 3 / min; kiln tail temperature is 500°C; kiln tail negative pressure is ±50Pa; surface cooler inlet temperature is 400°C; surface cooler outlet temperature is 120°C; dust collector inlet temperature is 140°C; roasting temperature is 850°C ; Vulcanization time is 20h.

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Abstract

The invention belongs to the technical field of electrolytic zinc waste residue recovery and provides a method for improving an electrolytic zinc waste residue sintering mode. The method comprises thefollowing steps: (1) controlling the kiln speed when a kiln is opened: controlling the skin speed at 0.4-0.6 r / 4h when the in-kiln temperature is smaller than 100 DEG C; controlling the kiln speed at0.4-0.6 r / h when the in-kiln temperature is 100-200 DEG C; controlling the kiln speed at 1r / 300s when the in-kiln temperature is 300-600 DEG C; and inputting electrolytic zinc waste residues when thein-kiln temperature is greater than 600 DEG C; and (2) after feeding the electrolytic zinc waste residues, controlling a system to operate: setting the kiln speed, the blast volume, the kiln tail temperature, the kiln tail negative pressure, the inlet temperature of a surface cooler, the outlet temperature of the surface cooler, the inlet temperature of a dust collector, the sintering temperatureand the vulcanizing time. According to the method, the production recovery rate is improved and the heat loss is reduced when the electrolytic zinc waste residues are roasted in the rotary kiln, andthe method is more energy-saving.

Description

technical field [0001] The invention belongs to the technical field of electric zinc waste slag recovery, and in particular relates to a method for improving the roasting method of electric zinc waste slag. Background technique [0002] Roasting rotary kiln (rotary kiln) is a conventional production equipment for processing waste slag and waste in the non-ferrous and metallurgical industries. The temperature in the rotary kiln is very high, and the raw material undergoes a series of physical and chemical reactions such as heating and decomposition. Due to the relatively low ore grade, complex ore composition and intercalation relationship, when the ore is directly put into the smelting process, the production cost is relatively high, and the recovery rate of the electro-zinc process is low, so it is very necessary to improve the zinc oxide roasting method. Contents of the invention [0003] In view of the above-mentioned deficiencies in the prior art, the object of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B19/30
CPCC22B1/02C22B19/30Y02P10/20
Inventor 曾维泉
Owner 成都盛威兴科新材料研究院合伙企业(有限合伙)
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