Magnesium Oxide Can Be Used In Construction, Agriculture, Environmental Protection, Chemical Industry And Medicine

Magnesium Oxide Product Overview

Light magnesium oxide (MgO Light) is a white powdery inorganic compound with the chemical formula MgO. Known for its low density, high purity, and large surface area, it is produced by high-temperature calcination of magnesite or precipitation from brine. It has a wide range of uses and is an indispensable material in the industrial and food sectors.

Magnesium oxide specifications

Magnesium oxide uses:

1. Refractory Materials: Due to its high melting point (>2800°C) and strong refractoriness, magnesium oxide is an important raw material for refractory bricks, electric furnace linings, and metallurgical furnace linings. It is commonly used in high-temperature equipment such as steel smelting, non-ferrous metal smelting, glass, and cement kilns.

2. Building Materials: As a magnesia-based cementitious material, it can be combined with magnesium chloride and other materials to form "magnesium oxychloride cement," which is used in fireproof panels, partition boards, ceilings, and floor tiles. Its lightweight, fireproof, and moisture-resistant properties make it widely used in green building materials.

3. Chemical Raw Materials: It is used to prepare magnesium salt compounds (such as magnesium sulfate, magnesium carbonate, and magnesium chloride).
It is used as a filler and reinforcing agent in rubber and plastics, improving the wear and heat resistance of the products. It can also be used as a catalyst, adsorbent, and desiccant.

4. Environmental Protection: In wastewater treatment, it is used as a neutralizer to adjust the pH of acidic wastewater. It can also be used in flue gas desulfurization, replacing limestone and reducing sulfur dioxide emissions. Adsorbent: Treats heavy metal ions or organic pollutants.

5. Agriculture: As a magnesium fertilizer, it replenishes magnesium in the soil and promotes crop photosynthesis. It regulates soil acidity and improves crop yield and quality.

6. Pharmaceutical and Food: Pharmaceutical-grade magnesium oxide can be used as an antacid to relieve excessive stomach acid. It can also be used as a laxative and magnesium supplement. Food Additive: It can be used as a decolorizer, pH adjuster, or nutritional supplement (magnesium source).

7. Electrical and Electronics: Due to its excellent insulating properties, it is used in cable fillers and heating element insulation. In the electronics industry, it can be used as a raw material for high-performance ceramic materials.

8. Other: It has certain uses in papermaking, sugar refining, glass, and coatings. In the aerospace industry, it is used to prepare lightweight, high-temperature structural materials.

Magnesium oxide technology

Carbonation method

Active magnesium oxide can be obtained by calcining dolomite or magnesite, digesting with water, carbonating, calcining and crushing. The brine dolomite lime method uses seawater or brine as raw materials to react with lime or dolomite to produce a precipitation reaction. The obtained magnesium hydroxide precipitate is filtered, dried and calcined to produce active magnesium oxide. Magnesium powder-sulfuric acid-ammonium carbonate method Magnesium powder and other magnesium-containing raw materials react with sulfuric acid to produce magnesium sulfate solution, and its MgO+H2SO4→MgSO4+H2O magnesium sulfate solution reacts with ammonium bicarbonate to produce magnesium carbonate precipitate, and its MgSO4+NH4HCO3+NH3→MgCO3↓+(NH4)2SO4. The precipitate is then filtered, separated, washed, dried, calcined and crushed to produce active magnesium oxide.

Sintering method

Use fused magnesium block as raw material. After material selection, crushing and screening, it is fully mixed with a certain proportion of liquid titanium dioxide, then washed, dried and sintered, and the particle size of 40 to 150 is screened out, which is the finished high-temperature electrical grade magnesium oxide.
Brine carbon ammonium method
Brine is reacted with ammonium bicarbonate to generate basic magnesium carbonate, which is then aged, washed, dehydrated, dried and calcined. After crushing, it is purified and heat-treated to obtain silicon steel grade magnesium oxide.

Electrofusion method

High-purity magnesium oxide is used as raw material and the finished product is obtained by electrofusion.

Hydrochloric acid method

The waste material of heavy magnesium oxide production is sent to the reactor, hydrochloric acid is added to react to generate magnesium chloride hexahydrate, and then sodium carbonate is added to react to generate basic magnesium carbonate, which is washed with water, calcined at high temperature, and crushed after cooling to obtain magnetic magnesium oxide.

Theory

Magnesium Oxide exhibits a strong affinity for moisture and carbon dioxide, forming magnesium hydroxide or magnesium carbonate upon reaction. This makes it an effective material for applications requiring reactivity and absorption capabilities. Its thermal stability and basic nature also allow it to function as a refractory and neutralizing agent.