Clay bricks, also known as sintered bricks, are artificial small blocks for construction. Clay bricks are made of clay (including shale, coal gangue and other powder materials) as the main raw material, and are processed, shaped, dried and roasted with mud. The difference between solid and hollow.
Advantages of clay bricks：
1. Clay bricks are weakly acidic at high temperatures, and their ability to resist alkaline slag erosion is slightly worse, but it increases with the increase of Al2O3 content, and their thermal stability is better than that of silica bricks and magnesia bricks.
2. After drying, qualified blast furnace clay bricks are impregnated with phosphoric acid in vacuum and fired twice at low temperature, which can be used to build the upper lining of blast furnace body.
3. Clay bricks are locally sourced, cheap, durable, and have the advantages of fire prevention, heat insulation, sound insulation, and moisture absorption. They are widely used in civil engineering projects, and waste broken bricks can also be used as aggregates for concrete.
4. Fly ash clay bricks use fly ash as the main raw material, mixed with coal gangue powder or clay and other cementing materials, and are made by batching, molding, drying and roasting, which can make full use of industrial waste and save fuel.
Main uses of clay bricks：
1. Clay bricks are mainly used in the metallurgical industry. As raw materials for the production of shaped refractory materials (bricks of various specifications) and unshaped refractory materials, the amount accounts for about 70% of all refractory materials. The hard clay in refractory clay is used for Production of blast furnace refractories, ironmaking furnaces, hot blast furnaces, lining bricks and plug bricks for steel drums, high-alumina clay is used to make aluminum bricks, high-alumina lining bricks and high-alumina refractory mud for electric furnaces and blast furnaces, hard clay And high alumina clay is often used as a clinker calcined at high temperature (1400-1800°C).
2. Refractory clay also has important uses in the grinding industry, chemical industry and ceramics industry. High alumina clay is melted in an electric arc furnace to produce abrasive materials. Among them, fused corundum abrasive is currently the most widely used abrasive, accounting for 2/3 of all abrasive products, high alumina clay can be used to produce various aluminum compounds, such as aluminum sulfate, aluminum hydroxide, aluminum chloride, potassium aluminum sulfate and other chemical products. In the ceramic industry, hard clay and semi-hard Quality clay can be used as a raw material for making daily-use ceramics, architectural porcelain and industrial porcelain.
3. Refractory clay is used in the building materials industry to make high-alumina bricks, phosphate high-alumina refractory bricks, and high-alumina fused cast bricks for cement kilns and glass melting kilns. High-alumina clay is calcined and then mixed with limestone to make aluminum-containing bricks. Cement, this kind of cement has the characteristics of quick setting ability, corrosion resistance and heat resistance.
Steps to make Clay Bricks at Home:
Step 1: Soil Preparation
The first step in making clay bricks is to gather soil, which should be rich in clay content. The soil should be free of impurities such as rocks, gravel, and organic matter. The soil should be sifted to remove any large particles.
Step 2: Mixing the Soil and Water
Once the soil has been gathered, it needs to be mixed with water thoroughly. The water should be added in small amounts until the soil becomes moist but not too wet that it becomes muddy.
Step 3: Adding Binding Material
The binding material needs to be added to the soil mixture. This could be sand, straw or ash. The amount of binding material added depends on the soil type and the mix you want to achieve. The mixing should be done thoroughly to ensure that the binding material is evenly distributed.
Step 4: Shaping the Bricks
To shape the bricks, you need to create a mold, which can be made from wood or metal. The mold should be the desired size and shape of the brick. The soil mixture is then placed into the molds and compacted using a trowel or shovel. Once the mold is filled, the top is smoothed out, and the bricks are left to dry.
Step 5: Drying the Bricks
The bricks should be left to dry for a few days. During this time, they should be protected from rain, direct sunlight, and strong winds. Once the bricks are dry, they can be stacked and stored for later use.
