การผลิตแมกนีเซียผสม

Fused magnesia has the characteristics of high purity, large crystal grains, dense structure, strong slag resistance, and good thermal shock stability. It is an excellent high-temperature electrical insulation material and is also used for making high-grade magnesia bricks, อิฐคาร์บอนแมกนีเซีย, and unshaped An important raw material for refractory materials. Fused magnesite is widely used in metallurgy, อุตสาหกรรมเคมี, national defense, scientific research, การบินและอวกาศ, household appliance components, เป็นต้น.

Fused magnesia physical and chemical properties

The physical and chemical properties of Large Crystal Fused Magnesia (LFM)

Product Code	องค์ประกอบทางเคมี (Mass Fraction),%						Particle Bulk Density g/cm’
Product Code	MgO≥	SiO2≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
LFM 99	99.00	0.30	0.60	0.35	0.10	0.08	≥3.51
LFM 98.5	98.30	0.40	0.80	0.45	0.12	0.08	≥3.50
LFM 98A	97.70	0.55	1.10	0.60	0.12	0.10	≥3.50
LFM 98B	97.50	0.60	1.20	0.65	0.15	0.12	≥3.49
LFM 97A	96.80	1.00	2.00	0.70	0.15	0.15	≥3.45
LFM 97B	96.50	1.15	2.30	0.75	0.18	0.20	≥3.42

The physical and chemical properties of High-Calcium Electrically Fused Magnesia (HFM (C/S≥2))

Product Code	องค์ประกอบทางเคมี (Mass Fraction),%						Particle Bulk Density g/cm’
Product Code	MgO≥	SiOz≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
HFM 98	97.70	0.60	1.20	0.65	0.12	0.10	3.50
HFM 97	96.80	0.85	1.70	0.75	0.15	0.15	3.48
HFM 96	96.00	1.20	2.40	0.85	0.18	0.18	3.45

The physical and chemical properties of Ordinary Fused Magnesia (FM)

Product Code	องค์ประกอบทางเคมี (Mass Fraction),%						Particle Bulk Density g/cm’
Product Code	MgO≥	SiOz≤	CaO≤	Fe2O3≤	Al2O3≤	Burn Loss	Particle Bulk Density g/cm’
FM 98	97.50	1.00	1.50	0.65	0.10	0.10	≥3.50
FM 97	96.50	1.30	2.00	0.70	0.15	0.15	≥3.48
FM 96	95.50	2.50	2.30	0.80	0.18	0.18	≥3.45

The specific production process of fused magnesite

In specific industrial production, the raw materials of fused magnesia of different specifications are also different. Ordinary fused magnesia usually uses magnesite directly as raw material, while large crystalline fused magnesia uses light-burnt magnesium as raw material. The equipment adopts Submerged arc furnaces mostly using three regenerated or non-regenerated graphite. The specific process is: feeding → ignition and lifting of electrode → gradual feeding → smelting (magnesite is sintered and melted by the heat generated by high current) → natural cooling → crushing, classification, and sorting → warehousing.

electric arc furnace production of fused magnesia

Advantages of fused magnesia

It has a complete structure, dense structure, high melting point (up to 2800°C), stable chemical properties, high compressive strength, strong insulation properties, ความต้านทานการกัดกร่อน, และทนต่อการกัดกร่อน. It is an important raw material for metallurgy, building materials, light industry, furnace lining, and bulk materials. It is also an indispensable and important refractory material in steel, ปูนซีเมนต์, กระจก, การถลุงโลหะที่ไม่ใช่เหล็ก, และอุตสาหกรรมอื่นๆ.

Main applications of fused magnesite

In the metallurgical refractory industry, it is used to produce auxiliary refractory materials such as high-purity fused magnesia, gunning materials, and ramming materials, as well as special refractory bricks such as flowing steel bricks, อิฐแมกนีเซีย, และ อิฐแมกนีเซียโครเมียม. It can also be used in vacuum and non-vacuum induction It is used as refractory lining on furnaces and electric arc furnaces. It is an ideal raw material for making magnesium oxide crucibles, furnace bladders, and various high-temperature casings.