Refractory castables, refractory cement and refractory mortar difference

Difference between refractory castables, refractory cement and refractory mortar

Refractory castables, refractory cement and refractory mortars are all Monolithic Refractories, and it is easy to confuse refractory castables, refractory cement and refractory mortars for customers who don’t understand all three of them.

Fireramo today for you to organize the refractory cement, refractory castables and refractory mortar between the three differences and applications . By reading this article, it can help you better understand the three unshaped refractory materials, refractory mortar, refractory castables and refractory cement, so that it is easier to buy the right refractory material for you.

Refractory Mortar

Refractory mortar can be divided into clay, high alumina, silica and magnesium refractory mortar according to the material. It is composed of refractory powder, binding agent and additives. Refractory clinker powder with an appropriate amount of plasticized clay as a binding agent and plasticizer and made of general refractory mortar, its low strength at room temperature, high temperature ceramic bonding to have a high strength.

The particle size of refractory mortar varies according to the application requirements, and its limit particle size is generally less than 1mm, some less than 0.5mm or finer. Selection of refractory mortar materials, should be considered with the masonry refractory products with the material. Refractory mud in addition to masonry materials, can also choose to paint or spray method as a maintenance coating of the liner.　

Composition: Refractory mortar usually consists of refractory materials such as silicate or high alumina, binder and other additives.

Characteristics: Refractory mortar has relatively good plasticity and is easy to construct, and is suitable for masonry, repairing and connecting small parts of the surface of high-temperature equipment. It can withstand higher temperatures, but the range of use temperature is relatively low.

Application: Refractory cement is often used for repairing, patching and plugging of high-temperature equipment, as well as masonry of furnace walls and roofs.

• 
  Magnesia Mortars
• 
  High Alumina Mortars
• Silicon Carbide Mortar
• 
  Silica Mortar

Refractory Cement

Refractory cement is also called aluminate cement. Aluminate cement is based on bauxite and limestone as raw materials, calcined clinker with calcium aluminate as the main ingredient and alumina content of about 50%, and then ground into a water-hard cementitious material. Aluminate cement is often yellow or brown, there are also gray. It is used for lining industrial kilns.

Composition: Refractory cement is mainly composed of refractory stone, high alumina stone and other main materials and a certain proportion of binder.

Characteristics: Refractory cement has high high temperature resistance and corrosion resistance. It is a kind of structural refractory material, suitable for direct masonry of the whole structure of high-temperature equipment, with good compressive strength and stability.

Application: Refractory cement is commonly used in masonry furnace, kiln, hearth and other high-temperature equipment of the overall structure, such as masonry furnace wall, furnace bottom and so on.

Refractory castables

Refractory castable is a kind of unshaped refractory material which is widely produced and utilized nowadays. It is mainly used for constructing various heating furnace linings and other integral structures. Some high-quality varieties can also be used for smelting furnace. Such as aluminate cement refractory castables can be widely used in a variety of heating furnaces and other non-slag, non-acid and alkali corrosion of thermal equipment. In the iron, steel and slag corrosion and high working temperature parts, such as steel tanks, steel drums and blast furnace body, iron ditch, etc., with slag and molten metal directly touching the metallurgical furnace and other containers in some parts of the use of high-quality phosphate refractory castables for repair also has excellent results.

Composition: Refractory castable is composed of refractory aggregate, binder and water-adding agent, etc., in which the refractory aggregate can be high alumina aggregate or silicon carbide.

Characteristics: Refractory castables are liquid or semi-fluid, and can be injected into the interior of high-temperature equipments by pouring or spraying. It has good high temperature resistance and thermal shock resistance, and is suitable for high temperature equipment with complex shapes and internal structures.

Application: Refractory castables are often used for repairing, sealing and masonry inside high temperature equipment, such as masonry furnace roof, furnace bottom and back of furnace wall.

• 
  Mullite castable
• 
  Corundum Castable
• 
  Fused silica ramming mass
• 
  Magnesia spinel ramming mass

To summarize, refractory clay is suitable for repairing and connecting small parts, refractory cement is suitable for the whole masonry structure, and refractory castables are suitable for casting complex shapes and internal structures. According to the specific use requirements and equipment, choose the appropriate refractory material for application.