Method for preparing high-purity magnesium oxide by pyrolysis of magnesium chloride
A technology of magnesium oxide and magnesium chloride, applied in magnesium oxide and other directions, can solve the problems of high energy consumption of pyrolysis, complicated control of pyrolysis process, etc., and achieve the effects of short decomposition time, simple process, and increased concentration and temperature.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0047] Embodiment 1 A method for preparing high-purity magnesium oxide by pyrolysis of magnesium chloride includes the following steps:
[0048] (1) After dissolving the salt lake bischofite with water, use barium chloride and a special resin for boron adsorption to remove B respectively 2 O 3 And SO 2- 4 , To obtain a magnesium chloride solution with a mass concentration of 29-32%; wherein each kg of bischofite consumes 15-20g of barium chloride.
[0049] (2) The magnesium chloride solution obtained in step (1) is concentrated in the pre-concentration container to a mass concentration of 38-41% and the solution temperature is 80-90°C, and then sprayed into the pyrolysis reaction through a pressure nozzle at a flow rate of 55L / h In the vessel, under the action of the nozzle pressure of 0.3MPa, contact with the gas at the temperature of 1200~1500℃; decompose under the conditions of decomposition temperature of 500℃, pressure of -60Pa, and decomposition time of 1~5s to obtain pyrolysi...
Example Embodiment
[0053] Embodiment 2 A method for preparing high-purity magnesium oxide by pyrolysis of magnesium chloride includes the following steps:
[0054] (1) After dissolving the old brine in water, use barium chloride and boron adsorption resin to remove B respectively 2 O 3 And SO 2- 4 , To obtain a magnesium chloride solution with a mass concentration of 29-32%; of which 15-20g barium chloride is consumed per kg of old brine.
[0055] (2) The magnesium chloride solution obtained in step (1) is concentrated in the pre-concentration container to a mass concentration of 38-41% and the solution temperature is 80-90°C, and then sprayed into the pyrolysis reaction through a centrifugal nozzle at a flow rate of 55L / h In the vessel, under the action of the nozzle pressure of 0.5MPa, it is in contact with the gas at the temperature of 1200~1500℃; the decomposition temperature is 500℃, the pressure is -80Pa, and the decomposition time is 1~5s. The product magnesium oxide and the main components wi...
Example Embodiment
[0059] Example 3 A method for preparing high-purity magnesium oxide by pyrolysis of magnesium chloride includes the following steps:
[0060] (1) After dissolving the salt lake bischofite with water, use barium chloride and a special resin for boron adsorption to remove B respectively 2 O 3 And SO 2- 4 , To obtain a magnesium chloride solution with a mass concentration of 29-32%; wherein each kg of bischofite consumes 15-20g of barium chloride.
[0061] (2) The magnesium chloride solution obtained in step (1) is concentrated in a pre-concentration container to a mass concentration of 38-41% and the solution temperature is 80-90°C, and then sprayed into the pyrolysis reaction through a pressure nozzle at a flow rate of 61L / h In the vessel, under the action of the nozzle pressure of 0.5MPa, contact with the gas at the temperature of 1200~1500℃; the decomposition temperature is 550℃, the pressure is -35Pa, and the decomposition time is 1~5s. The product magnesium oxide and the main co...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap