Unveiling the Preparation Process of Industrial Magnesium Carbonate
The preparation process of industrial magnesium carbonate includes multiple methods,each with its unique steps and characteristics.The following is an introduction to the preparation process of industrial magnesium carbonate
The preparation process of industrial magnesium carbonate includes multiple methods,each with its unique steps and characteristics.The following is an introduction to the preparation process of industrial magnesium carbonate:
Brine carbonation method
Raw material processing:The brine carbonation method uses brine,seawater,and other solutions containing magnesium chloride and magnesium sulfate as raw materials,which react with CO₂produced after calcination of dolomite or limestone.
Chemical reaction:Baiyun ash or lime reacts with brine to form magnesium hydroxide precipitate,which is then subjected to carbonization,pyrolysis,and other steps to produce light magnesium carbonate.
Product processing:After water washing,dehydration,drying,and crushing,light magnesium carbonate products are obtained.
Magnesite carbonization method
Ore processing:Add magnesite ore and white coal in a certain proportion to a vertical kiln for calcination,and control the temperature in different temperature ranges.
Chemical reaction:Light burned clay is crushed and reacts with hot water to produce Mg(OH)₂,which then reacts with CO₂in a carbonization tower to produce magnesium bicarbonate,ultimately converted into magnesium carbonate.
Product processing:Light magnesium carbonate is obtained through steps such as sedimentation,separation,pyrolysis,filtration,and drying.
Carbonization method of asbestos tailings
Raw material preparation:The chemical composition of asbestos tailings is similar to that of dolomite,but the calcium magnesium ratio is different,so it is necessary to strengthen the removal of hydrochloric acid soluble substances.
Chemical reaction:The CO₂produced by the calcination of asbestos tailings with dolomite or limestone reacts to produce light magnesium carbonate through steps such as carbonization and pyrolysis.
Product processing:Light magnesium carbonate is also obtained through washing,dehydration,drying,and crushing.
Preparation method of high-purity magnesium carbonate
Raw material dissolution:Heat in water until boiling to dissolve magnesium nitrate,adjust the specific gravity of the solution,and cool to separate crystals.
Precipitation generation:Dissolve the crystals in water,add ammonium carbonate solution to generate a white precipitate,filter to form the first filtrate.
PH adjustment:slowly add the second filtrate into the first filtrate under stirring,adjust the PH value to 8,and leave it to separate and precipitate.
Product washing:Wash the precipitate multiple times with hot water until the pH value is 7,then centrifuge and dry to obtain high-purity magnesium carbonate.
Overall,the preparation process of industrial magnesium carbonate is diverse,and each method has its specific steps and technical requirements.From raw material selection to final product processing,strict control of conditions is required at every step to ensure product quality.With the continuous advancement of technology,these preparation methods are also constantly optimized to meet the market's demand for high-quality magnesium carbonate.