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

Magnesium smelting process and device

A magnesium smelting and process technology, applied in the field of metal magnesium silicon thermal reduction process and equipment, can solve the problems of not being popularized and applied, low product purity, large single furnace output, etc., and achieve fast preparation time, low furnace temperature, and production high efficiency effect

Inactive Publication Date: 2019-09-20
CHANGAN UNIV
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the reaction speed is fast, the output of a single furnace is large, and the disadvantage is that the reaction temperature is high, the process is unstable, and the purity of the product is not high.
Therefore, this method has not been widely used

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnesium smelting process and device
  • Magnesium smelting process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Calcined white with a magnesium oxide content of 36wt% (calcined white is the ore after dolomite and magnesite pre-calcined, and its main components are magnesium oxide and calcium oxide) with ferrosilicon and fluorite according to the quality of 100:20:5 Ratio for batching, ball milling until the remaining 8% of the 200 mesh sieve is formed into a cylindrical shape with a diameter of 6mm and a length of 12mm under a pressure of 25Mpa;

[0027] Place the molding raw material between the two electrodes in the vacuum reduction furnace, evacuate to 100Pa, heat the molding raw material to 700°C, and directly apply a voltage of 600V (50V / mm) to the molding raw material, and control the current at 0.4 amperes. Let cool after 3 minutes.

[0028] The entire process of this embodiment takes time: heating for 1 hour, power on for 3 minutes, and cooling for 1.5 hours.

[0029] The content of magnesium oxide in the measurement sample was changed from 30.24% to 8%, and the reductio...

Embodiment 2

[0031] Mix calcined white with a magnesium oxide content of 35wt%, silicon aluminum, and fluorite in a mass ratio of 110:21:6, ball mill until the remaining 10% passes through a 200-mesh sieve, and shape it into a 7mm in diameter and 10mm in length under a pressure of 30Mpa. Cylindrical;

[0032] Place the molding raw material between the two electrodes in the vacuum reduction furnace, evacuate to 2000Pa, heat the molding raw material to 1000°C, apply a voltage of 600V (60V / mm) to the sample, control the current at 0.4 ampere, and react after 5 minutes cool down.

[0033] The entire process of this embodiment takes time: heating for 1.5 hours, power on for 5 minutes, and cooling for 1 hour.

[0034] The content of magnesium oxide in the measurement sample was changed from 31.64% to 12%, and the reduction rate of magnesium oxide was 85%.

Embodiment 3

[0036] The calcined white with a magnesia content of 35wt% is mixed with ferrosilicon and fluorite according to the mass ratio of 105:18:4, ball milled to 3% after passing through a 200 mesh sieve, and formed under a pressure of 15Mpa to a length of 6mm, a height of 3mm, Regular blocks with a width of 5mm;

[0037] Place the molding raw material between the two electrodes in the vacuum reduction furnace, evacuate to 4000Pa, heat the molding raw material to 1100°C, and directly apply a voltage of 600V (200V / mm) to the molding raw material, and control the current at 0.4 amperes. Let cool after 4 minutes.

[0038] The entire process of this embodiment takes time: heating for 1.5 hours, power on for 4 minutes, and cooling for 1 hour.

[0039] The content of magnesium oxide in the measurement sample was changed from 32.01% to 10% magnesium oxide reduction rate of 79%.

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 magnesium smelting process and device. The disclosed magnesium smelting process comprises the steps of uniformly mixing preparation raw materials containing silicon and magnesium ores, and then carrying out pressure forming; and is characterized by heating the formed raw material to 600 to 1100 DEG C under the condition with 13 to 4000Pa, and directly applying voltage on the formed raw material, wherein the magnitude of the applied voltage is 10 to 200V / mm, and the duration for applying the voltage is 1 to 5min. The disclosed magnesium smelting device comprises a vacuum smelting furnace, wherein a pair of electrodes is arranged in the vacuum smelting furnace and is used for directly applying the voltage to the formed raw material in the magnesium smelting process. According to the magnesium smelting process and the magnesium smelting device provided by the invention, a series of problems such as high temperature and long time of magnesium metal reduction through a traditional silicothermic process are solved, the temperature of a reduction device is greatly reduced, the magnesium metal reduction speed is greatly improved, magnesium metal slags can be used as cement materials, green environmental protection is realized, and important economic benefit and social benefit are realized.

Description

technical field [0001] The invention belongs to the field of metallurgical industry, and in particular relates to a metal magnesium silicon thermal reduction process and device. Background technique [0002] The silicothermal reduction method uses silicon as a reducing agent to carry out a reduction reaction under high temperature and high vacuum conditions to produce metallic magnesium. This method is called silicon thermal magnesium smelting. Due to the stable properties of ferrosilicon, strong reducibility, relatively low price, and easy to achieve and control the reduction reaction conditions, the silicon thermal reduction method for smelting metal magnesium has become the most widely used smelting process in the magnesium smelting industry in the world today except for the electrolysis method. Magnesium craft. Especially in China, silicon thermal magnesium smelting has almost become the main method of producing metal magnesium. [0003] According to the process and e...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/22C22B5/04
CPCC22B5/04C22B26/22
Inventor 赵鹏李江江陈彤丹
Owner CHANGAN UNIV
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