Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Technology for direct method production of highly pure zinc oxide

A zinc oxide and direct method technology, applied in the direction of improving process efficiency, can solve the problems of inability to obtain high-purity zinc oxide products, zinc oxide mixed with impurities, and slag cannot be discharged out of the furnace in time, so as to alleviate the shortage of zinc ore resources, The effect of low cost, simple and easy-to-control operation steps

Inactive Publication Date: 2018-06-29
SHIJIAZHUANG LONG LI CHEM CO LTD
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can continuously produce zinc oxide products through the direct method, and the energy consumption is low. However, since the reduction reaction and the oxidation reaction are carried out in the same area in this method, the slag after the reaction cannot be discharged outside the furnace in time, and the reduction and oxidation reactions cannot be carried out in time. There is a large amount of gas blown into the oxidation reaction area, which will cause a large amount of impurities to be mixed in the generated zinc oxide, and it is impossible to obtain high-purity zinc oxide products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Open the furnace door of the reduction furnace, open the valve at the connection between the primary powder collection device and the smoke alley, start the induced draft fan on the primary powder collection device, and adjust the air volume of the induced draft fan to 18500m 3 / h, the operator spreads 400kg of bottom coal into the reduction furnace, turns on the blower on the reduction furnace, and adjusts the air intake to 3600m 3 / h, ignite the bottom coal, after the bottom coal starts to burn and the temperature reaches 820°C, the operator mixes 4t of zinc ash (metal zinc content is 73%), lump coal and water (weight ratio is 1:0.85:0.15) Lay it flat on the bottom coal to start the reduction reaction, after which the temperature in the reduction furnace is controlled within the range of 890-930°C.

[0030] The zinc vapor produced by reduction enters the oxidation chamber, and the oxidation reaction is carried out under the condition of 1260-1300 ° C, and the primary ...

Embodiment 2

[0035] Open the furnace door of the reduction furnace, open the valve at the connection between the primary powder collection device and the smoke alley, start the induced draft fan on the primary powder collection device, and adjust the air volume of the induced draft fan to 18500m 3 / h, the operator spreads 400kg of bottom coal into the reduction furnace, turns on the blower on the reduction furnace, and adjusts the air intake to 3000m 3 / h, ignite the bottom coal, and after the bottom coal starts to burn and the temperature reaches 800°C, the operator mixes 4t of zinc ash (metal zinc content is 68%), lump coal and water (the weight ratio is 1:0.7:0.1) Lay it flat on the bottom coal to start the reduction reaction, after which the temperature in the reduction furnace is controlled within the range of 800-840°C.

[0036]The zinc vapor generated by reduction enters the oxidation chamber, and the oxidation reaction is carried out under the condition of 1200-1250 ° C, and the pr...

Embodiment 3

[0041] Open the furnace door of the reduction furnace, open the valve at the connection between the primary powder collection device and the smoke alley, start the induced draft fan on the primary powder collection device, and adjust the air volume of the induced draft fan to 18500m 3 / h, the operator spreads 400kg of bottom coal into the reduction furnace, turns on the blower on the reduction furnace, and adjusts the air intake to 4500m 3 / h, ignite the bottom coal, and after the bottom coal starts to burn and the temperature reaches 950°C, the operator mixes 4t of zinc ash (metal zinc content is 71%), lump coal and water (the weight ratio is 1:1.0:0.3) Lay it flat on the bottom coal to start the reduction reaction, after which the temperature in the reduction furnace is controlled within the range of 840-900°C.

[0042] The zinc vapor produced by reduction enters the oxidation chamber, and the oxidation reaction is carried out under the condition of 1250-1290°C, and the prim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a technology for direct method production of highly pure zinc oxide. A device used in the technology comprises a reducing furnace, an oxidizing chamber, a smoke channel, a primary powder collector, a settling chamber, a cooling tube dust collector and a bag dust collector. The technology comprises the following steps: zinc ash used as a raw material is reduced in the reducing furnace to form metallic zinc, the metallic zinc is oxidized in the oxidizing chamber to generate zinc oxide, the zinc oxide generated in the initial 5-10 min stage of the reaction is collected bythe primary powder collector to obtain primary powder, the generated zinc oxide undergoes impurity removal through the settling chamber, and highly pure zinc oxide powder with the purity being equal to or more than 99.6% is collected through the cooling tube dust collector and the bag dust collector. The technology has the advantages of simple operating steps and cheap and easily available raw materials, and the obtained highly pure zinc oxide is directly used in the production of tire rubbers, conveyor belt rubbers and high-level ceramics, and has great economic values.

Description

technical field [0001] The invention belongs to the technical field of basic chemical raw materials, and in particular relates to a production process of basic chemical raw material zinc oxide, especially a production process of high-purity zinc oxide. Background technique [0002] Zinc oxide is an important branch of the inorganic chemical zinc salt series. In recent years, with the development of science and technology, many characteristics of zinc oxide have been re-recognized by people, and its characteristic functions have been developed and used in new technical fields and industries. Among them, zinc oxide has therefore become an indispensable and important basic chemical raw material in my country's economic construction. [0003] The production process of zinc oxide can be divided into three categories: wet method, indirect method and direct method. Zinc oxide produced by wet method uses zinc sulfate or zinc chloride as raw material, the process route is complex, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B19/34C22B19/30
CPCC22B19/30C22B19/34Y02P10/20
Inventor 崔文广郑会强高岩磊次立杰李中秋郑国强刘胜国任蕾
Owner SHIJIAZHUANG LONG LI CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com