Feed additive - Magnesium oxide

Magnesium oxide is commonly known as bitter soil, also known as magnesium oxide. Feed magnesium oxide is an alkaline oxide that has the properties of alkaline oxide and belongs to a cementing material. White powder (pale yellow is magnesium nitride), odorless, tasteless, and non-toxic. It is a typical alkaline earth metal oxide with the chemical formula MgO. White powder, melting point 2852 ℃, boiling point 3600 ℃, relative density 3.58 (25 ℃). Soluble in acid and ammonium salt solutions, insoluble in alcohol. Solubility in water is 0.00062 g/100 mL (0 ° C)

0.0086 g/100 mL (30 °C)。 Exposed to air, it is easy to absorb water and carbon dioxide and gradually become basic magnesium carbonate. Light products are faster than heavy products, and combine with water to form magnesium hydroxide under certain conditions, presenting a slightly alkaline reaction. The pH of the saturated aqueous solution is 10.3. Soluble in acids and ammonium salts but insoluble in water, the solution is alkaline. Insoluble in ethanol. It has strong refractivity in the visible and near ultraviolet light range. Magnesite (MgCO3), dolomite (MgCO3 · CaCO3), and seawater are the main raw materials for the production of magnesium oxide. Thermal decomposition of magnesite or dolomite to obtain magnesium oxide. Using hydrated lime to treat seawater to obtain magnesium hydroxide precipitation, and burning magnesium hydroxide to obtain magnesium oxide. Alternatively, magnesium chloride blocks obtained from the comprehensive utilization of seawater or brine after bromine extraction can be used as raw materials, and sodium hydroxide or sodium carbonate can be added to generate magnesium hydroxide or basic magnesium carbonate precipitates, which are then ignited to obtain magnesium oxide. China mainly uses magnesite, dolomite, brine, or halogen blocks as raw materials.