Ramming and castable are both refractory materials, but there are also differences between the two:

1, the difference of raw material composition:

Ramming material is mainly composed of a certain granular distribution of aggregate and powder plus binder, additive made of mainly by manual or mechanical ramming construction of amorphous refractory materials.

Ramming materials include corundum ramming material, high aluminum ramming material, silicon carbide ramming material, carbon ramming material, silicon ramming material, magnesium ramming material, etc. For example, the bottom ramming material of the electric furnace is made of silicon carbide, graphite and electric calcined anthracite as raw materials, mixed with a variety of ultrafine powder additives, and fused cement or composite resin as a binder. Filler for filling the gap between furnace cooling equipment and masonry or masonry screed.

Castable is a kind of granular and powdery material made by adding a certain amount of binder to a refractory material. It has high fluidity and is suitable for amorphous refractories formed by casting.

The three main components of castable, additional components and impurities are divided into: aggregate, powder and binder. The raw materials of aggregate are silica, diabase, andesite and wax stone.

2, the difference between the scope of construction:

The ramming material is resistant to industry (ramming material manufacturers) at the time of ramming construction. It is recommended to pay attention to uniform and smooth construction.

Ramming material is generally used for refractory brick masonry can not or masonry difficult kiln parts, the construction of ramming material is relatively simple, fill the furnace cooling equipment and masonry gap or masonry screed with filler.

The castable is mainly used to build a variety of heating furnace lining and other integral structures. Some varieties can also be used in smelting furnaces. Such as aluminate cement refractory castable can be widely used in a variety of heating furnaces and other slag free, no acid and alkali erosion of thermal equipment.

In the parts affected by hot metal, molten steel and slag erosion: the working temperature is high, such as steel trough, steel barrel and blast furnace body, iron ditch, etc., can be used by low calcium and pure high aluminum cement combined with high alumina content and good sintering of granular and powder made of refractory castable. For example, phosphate refractory castables can be widely used in heating furnaces and soaking stoves that heat metals, as well as in coke ovens and cement kilns where the material is directly in contact with it.

In some parts of metallurgical furnaces and other vessels in direct contact with molten slag and molten metal, the use of phosphate refractory castables for repair also has 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; Liquid metal pouring runner, generally molded with castable, after use for a period of time, the castable will fall off, the need to repair regularly.