Corundum Mullite Ultra-low Cement Prefabricated Blocks

The corundum-mullite ultra-low cement prefabricated block is made of high-quality high-alumina bauxite clinker, mullite, corundum, pure aluminate cement and a variety of admixtures. After casting, curing, drying and other processes, the corundum-mullite ultra-low cement prefabricated parts are made. The prefabricated burner bricks, burner beams and other corundum-mullite ultra-low cement prefabricated parts have the characteristics of stable quality, long service life, and convenient maintenance and replacement. They are widely used in various heating furnaces, annealing furnaces, heat treatment furnaces, ignition furnaces and other thermal equipment. Product material and shape design can be provided according to user requirements.

Product Features

1. Good high temperature performance;

2. High strength;

3. Good density;

4. Stable volume

5. Strong resistance to chemical erosion;

6. Good thermal shock resistance;

7. High temperature flue gas erosion resistance.

 

There are many types of refractory prefabricated parts. According to the type of aggregate, they can be divided into clay, high alumina, 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, medium and small prefabricated parts; some prefabricated parts have steel bars and anchors inside, which can also be divided into ordinary prefabricated parts, steel bar prefabricated parts and anchor prefabricated blocks.

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

1). It is not restricted by the shape of the use part, and the characteristics of refractory materials can be realized. (The special shape of some parts of the kiln cannot realize refractory brick masonry, and refractory prefabricated parts make up for this deficiency.)

2). The material performance is superior and the service life of the finished product is longer. (The raw materials for casting prefabricated parts can be selected according to the use equipment part and working temperature.)

3). Convenient construction and quick installation. (The prefabricated parts are made by the supplier, and the pouring, curing, drying and other links are completed in advance, which reduces the on-site construction time and solves the problem of cracking caused by the rapid heating of the kiln in a hurry.)

4). Not limited by the ambient temperature, it can be installed at any time. (The preliminary work of prefabricated parts has been completed by the supplier, and the buyer can directly install and use them after receiving the goods, and can be constructed in any season environment)

Castable prefabricated parts are also called refractory prefabricated parts. The production method is to select refractory castables or plastics according to the needs, and after sufficient mixing, pour them into various prefabricated molds, and form them by vibration and ramming. After forming, put them in a constant temperature and humidity room for curing, and the curing time generally takes 3 days. After the curing is completed, use a small hammer to knock it, and judge the degree of curing of the product by the sound of the knocking to determine whether it can be demoulded. If the sound is muffled and the surface is soft, it is generally necessary to air dry it naturally for one day, and it can be demoulded after it is fully cured.

In industrial kilns and thermal equipment, the use of prefabricated blocks to build furnaces has many advantages that ordinary refractory bricks cannot achieve:

Short furnace repair time. Prefabricated parts can be pre-designed according to the furnace type. The size specifications and assembly methods of each position can be designed. When the customer needs to repair the furnace, a scientific and reasonable installation method can be adopted, and machinery such as cranes and forklifts can be used to greatly shorten the furnace construction time;

Short furnace baking time. Prefabricated parts can be baked in the manufacturer first, and a scientific assembly structure can be designed, such as concave and convex inlaid tenons, so that the amount of refractory mud or glue used for bonding is very small. Once the furnace is built, it can be heated up quickly immediately;

Good thermal insulation and energy saving. The furnace body built with refractory bricks has many brick joints and is prone to heat leakage. The specifications of prefabricated parts are larger than refractory bricks, and they are connected by tenons, without straight seams, and have good thermal insulation;

Depending on the material, the product can be used directly or after baking. For those with high requirements for creep performance, the product can also be sintered at high temperature before use.

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