First of all, how do we identify the quality of refractory brick when we buy it? Let's explain it from several aspects.
1. Look at the impurity ratio of refractory brick. Generally speaking, there will be impurities in the sintering process of refractory bricks in strict accordance with the proportion of ingredients, which is no problem. However, some manufacturers often do not produce according to the proportion of materials, so that the sintered refractory bricks do not have a hard structure, so that the quality of sintered bricks is not up to standard. Finally, they cheat consumers with high prices. When you buy refractory bricks, you can view them through their surfaces. Generally, the surface of refractory bricks with high impurity content will be very rough, while those with qualified quality have uniform color and smooth and flat surface, which can be visually distinguished from the surface.
2. This method is the most effective for the sintering experiment of refractory brick. Generally, when we buy refractory bricks, we will go to the manufacturer to check. Especially before we decide to buy, we must let the manufacturer conduct high-temperature test to check whether the sintering index of refractory brick is the same as the standard index. As long as the deviation of the experimental results is small, the quality of the brick is still qualified, which is a good method.
Now that we know how to identify the quality, how can we buy high-quality and low-cost refractory bricks? Next, let's briefly introduce it to you.
1. To inquire about the price of refractory bricks, you need to explain the materials of required refractory bricks by telephone or fax. Generally, refractory bricks are mainly divided into high aluminum refractory bricks, clay refractory bricks, light refractory bricks, magnesium chromium bricks, fused bricks, silicon bricks, etc.
2. It is necessary to specify the grade of refractory bricks required; For example, high alumina refractory bricks are divided into: class I refractory bricks, class II refractory bricks, class III refractory bricks, etc.
3. Specify the specifications and dimensions of refractory bricks, which are generally transmitted in the form of drawings. General standard refractory brick manufacturers have stock. If it is special-shaped refractory brick, it needs to be customized.
4. Quantity is also one of the factors affecting the price of refractory bricks, because the mold price for producing refractory bricks is generally thousands or even tens of thousands. If the quantity is large, the manufacturer's production cost will be reduced.
