Magnesium oxide production process from magnesium sulfate pyrolysis
Magnesium oxide classification:divided into two types:light magnesium oxide and heavy magnesium oxide.Lightweight and loose in volume,it is a white amorphous powder.Odorless,tasteless,and non-toxic.Density 3.58g/cm3.It is insoluble in pure water and organic solvents,and its solubility in water increases due to the presence of carbon dioxide.
contact us, classification:divided into two types:light magnesium oxide and heavy magnesium oxide.Lightweight and loose in volume,it is a white amorphous powder.Odorless,tasteless,and non-toxic.Density 3.58g/cm3.It is insoluble in pure water and organic solvents,and its solubility in water increases due to the presence of carbon dioxide.
The process of pyrolyzing magnesium oxide and magnesium sulfate to produce magnesium oxide aims to comprehensively utilize the by-product magnesium waste liquid in the production of potassium fertilizer in salt lakes,thereby constructing a salt lake resource circular economy system.This process involves pyrolysis of magnesium sulfate to obtain magnesium oxide and sulfur dioxide,which are then converted into sulfuric acid.The sulfuric acid then reacts with magnesium chloride to produce magnesium sulfate,which is then recycled in the system.
Magnesium oxide is transformed into crystals by high-temperature calcination.Generate magnesium carbonate complex salt when encountering carbon dioxide in the air.Heavy and compact in volume,it is a white or beige powder.It is easy to combine with water and absorb moisture and carbon dioxide when exposed to air.Mixing with magnesium chloride solution is prone to gelation and hardening.
With the upgrading of industrialization and the demand and development of the high-tech functional material market,a series of high-tech and fine magnesium oxide products have been launched,mainly used in nearly ten product categories,including advanced lubricating oil,advanced tanning alkali grade,food grade,pharmaceutical,silicon steel grade,advanced electromagnetic grade,and high-purity magnesium oxide.
Magnesium sulfate pyrolysis to produce magnesium oxide process:using magnesium sulfate heptahydrate as raw material and natural gas,coal gas,etc.as reducing agents to reduce and decompose magnesium sulfate,reducing the pyrolysis temperature from 1150℃to 800℃,achieving a conversion rate of over 99%,and a purity of over 98%for magnesium oxide;High purity magnesium oxide was prepared using a low-temperature reduction fluidized bed pyrolysis clean process.A fluidized bed reduction pyrolysis reactor was designed to improve heat transfer efficiency and reaction speed,recover system energy,and reduce overall energy consumption;
The process of magnesium sulfate pyrolysis to produce magnesium oxide has achieved energy conservation,environmental protection,and resource utilization of by-products throughout the entire process.Using magnesium oxide instead of ammonia in the process of ammonium sulfite pulping.The alkaline buffer uses magnesium oxide,and all indicators of the slurry can reach a level similar to that of the ammonia water method.Using magnesium oxide as a buffer can easily bleach pulp and promote delignification during the cooking process,reducing pollutant emissions and helping to protect the environment while also reducing costs.