Refractory Plastic Prefabricated Blocks

The types of refractory plastic prefabricated parts are aluminum phosphate cement, water glass, phosphoric acid and aluminum phosphate, clay, etc. Prefabricated parts are divided into high aluminum, clay, silicon and corundum, aluminum magnesium materials, etc. according to the type of aggregate. The molding methods are vibration molding, vibration pressure molding and ramming molding.

Refractory plastic prefabricated parts are divided into large, medium and small, with weights ranging from tens of kilograms to several tons. They are divided into ordinary prefabricated parts, steel prefabricated parts, and anchor prefabricated parts. If steel bars are installed in the prefabricated block, they should be kept away from the heating surface, and the distance from the lower working surface should be greater than 160-260mm. The specific size depends on the working temperature of the furnace. The added steel bars should be made into convex shapes, and the steel bar model should be No. 3 steel. It is best to use aluminum-infiltrated steel bars. The steel bars do not need to be wrapped with paper or painted, so that they can be tightly combined with the raw materials. Because the added steel bars can introduce shear forces as the temperature changes, the service life can be improved.

The shapes of refractory plastic prefabricated parts are square, long strip, arch, ring and super special (with holes or grooves in the middle). However, the size is determined by the size of the furnace and the thickness of the lining. When designing, the number of models should be reduced as much as possible to reduce the production cost. If it is a prefabricated product for hoisting, the weight of each unit should be controlled at 1-3 tons. It is inconvenient to hoist and construct if it is too large. If it is manually transported, the weight should be controlled at about 30kg.

 

The length and thickness directions of the refractory plastic prefabricated parts should be based on 116mm and 68mm as the modulus. Select an appropriate multiple and subtract the size of the mortar joint to get the size of the prefabricated block. The width should be determined by the length of the furnace, not less than 300mm, and the height should not be less than 400mm. The seam width of the two prefabricated blocks is best between 3-8mm.

In short, prefabricated parts are factory-produced, low-temperature treated, fast construction, no baking required, and long life.

This product is a composite material made of plastic, iron parts and refractory fibers and machine-pressed. When in use, just weld the iron parts in the plastic prefabricated block to the water-cooled furnace rib tube.

Refractory prefabricated parts can be used without being baked at a certain temperature. But the prerequisite is that explosion-proof fiber is added to the pre-made process ratio to fully discharge the crystal water. Or if the natural drying time is long, it can be put into use without baking.

Refractory prefabricated parts are an extension of refractory castables. They are made of raw material particles, powders, and binders mixed with water, and then poured into pre-made molds. After dehydration, baking and drainage processes, the refractory prefabricated parts are put into use. .

Refractory prefabricated parts belong to the category of unshaped refractory materials, also known as castable prefabricated blocks and unshaped refractory prefabricated blocks. It is to pour the mixed castable into the desired shape through the mold. It has diverse shapes, superior performance, and is more flexible to use than stereotyped products.

There are many types of refractory prefabricated parts. According to the type of aggregate, they can be divided into clay, high-aluminum, silicon carbide, corundum and other prefabricated parts. The weight of prefabricated parts ranges from tens of kilograms to several tons, so they can be divided into large and medium-sized. , small prefabricated parts; some prefabricated parts have steel bars and anchors added to them, which can also be divided into ordinary prefabricated parts, steel bar prefabricated parts and anchor prefabricated blocks, etc.

The outstanding features of using refractory prefabricated parts are as follows:

1) It is not restricted by the shape of the use part and can realize the special-shaped characteristics of refractory materials. (The unique shape of some parts of the kiln makes it impossible to build refractory bricks, and refractory prefabricated parts make up for this shortcoming.)

2) The material properties are superior and the finished products have a longer service life. (The raw materials for casting prefabricated parts can be selected according to the location of the equipment used and the working temperature.)

3) Convenient construction and quick installation. (The production of prefabricated parts is carried out by the supplier, and several links such as pouring, curing, and drying are completed in advance, which reduces on-site construction time and also solves the problem of explosion caused by the rapid heating of the kiln in a hurry.)

4) It is not limited by ambient temperature and can be installed at any time. (The preliminary work for the production of prefabricated parts has been completed by the supplier. The purchaser can directly install and use it after receiving the goods, and can be constructed in any seasonal environment.)

Refractory prefabricated parts are widely used in thermal equipment such as heating furnaces, electric furnace roofs, tapping troughs, and flame nozzles, and play a major role.

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