In the refractory industry, dolomite is the second largest alkaline refractory raw material after magnesite and is mainly used to prepare dolomite refractory materials. Clinker obtained by directly calcining natural dolomite ore is also called dolomite sand. This kind of pure dolomite sand has poor hydration resistance, and its output in my country is not large.
At present, dolomite sand or synthetic magnesia-calcium sand is mainly used to prepare dolomite bricks, zirconium-added dolomite bricks, magnesia-calcium bricks, unburned magnesium-calcium (carbon) bricks and magnesia amorphous refractory materials, which can be used in stainless steel refining furnaces. Such as AOD furnace, VOD furnace and other refining furnaces and cement kiln firing belt.
Dolomite bricks are made from dolomite sand calcined from natural dolomite. A small number of manufacturers use imported dolomite bricks in cement rotary kilns.There are two types of refractory materials magnesia-calcium bricks: one is magnesia-calcium bricks produced with synthetic magnesia-calcium sand as the main raw material; the other is magnesia-calcium bricks produced with dolomite sand (or magnesia dolomite sand) and magnesia sand as the main raw materials. , also known as magnesium dolomite brick.
Unfired magnesia-calcium brick: a refractory material that uses sintered dolomite sand, magnesia or graphite with different particle sizes as the main raw material and can be used directly without firing. It has the advantages of energy saving, good thermal shock stability, simple production process, and has Good slag resistance.
Magnesium-calcium series amorphous refractory materials: Dolomite is also used to prepare various magnesia-calcium amorphous refractories materials, such as electric furnace bottom ramming materials, tundish coating materials, ladle gunning materials, converter gunning materials, and RH furnace gunning materials. , self-flowing heat patching materials and other unshaped refractories materials.
