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What are the advantages of ramming and pouring?

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What are the advantages of ramming and pouring?


Compared with other amorphous materials, refractory ramming materials are loose or semi-dry loose, and most of them are non-adhesive before forming, so that only a strong beating can obtain a dense structure. Compared with castables and plastics, ramming materials have higher stability and erosion resistance at high temperatures. However, depending on the selection of high-quality materials, the reasonable ratio of pellets to powders also has a lot to do with it.

Castables are refractory materials, but there are also differences between the two:

1. Differences in raw material composition: The ramming material is mainly made of aggregates and powders with a certain particle size, plus binders and additives, which are mainly made of artificial or mechanical beating.

For example, electric furnace bottom material is made of silicon carbide, graphite, electric calcined anthracite as raw material, mixed with various ultrafine powder additives, and fused cement or composite resin is used as a bulk material. It is used to fill the cooling equipment of the furnace body and the filler for the masonry gap or masonry leveling layer.

Castable is a kind of granular and powdery material made by adding a certain amount of binder to refractory materials.It has high fluidity and is suitable for casting shaped amorphous refractories.There are three main components, external components and impurities of castable, which are divided into aggregate, powder and binder.Aggregate raw materials are silica, diabase, andesite and wax stone.2, the difference between the scope of application: ramming materials in the ramming construction of luoyang (ramming material manufacturers) must pay attention to uniform force, smooth construction.Ramming material is generally used for refractory brick masonry less or difficult parts of the kiln, ramming material construction is relatively simple, used for filling furnace body cooling equipment and masonry gap or masonry leveling layer with filler.The castable is mainly used for the construction of a variety of heating furnace lining and other integral structures.Some high quality varieties can also be used in smelting furnaces.Such as aluminate cement refractory castable can be widely used in a variety of heating furnace and other slag free, no acid and alkali erosion of the thermal equipment.In places where molten iron, molten steel and slag are corroded and the working temperature is higher, such as steel outlet groove, steel barrel and blast furnace body, iron outlet groove, etc., refractory castable made of high quality granular and powdery materials containing high alumina that are combined with low calcium and pure high aluminum cement can be used.For example, phosphate refractory castable can be widely used in heating furnace and heating metal soaking furnace, also can be used in coke oven, cement kiln directly contact with the parts of the material.In some parts of metallurgical furnaces and other vessels in direct contact with slag and molten metals, the use of high quality phosphate refractory castable for repair has also shown good results.Generally speaking, the castable can be used for the casting of key parts of the furnace body, such as the furnace door frame, near the feeding port;Metal fluid pouring runner, generally with castable casting molding, after a period of time, the castable will fall off, need regular repair of the place.


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