How to make silica bricksSoil is one of the main materials needed to make bricks, which is a mixture of clay, feldspar, limestone, sand, sulfate, and iron minerals. (pure clay is not needed to make bricks). Too much lime in the soil lowers the quality of bricks, so clay should not have a lot of lime. Silica: The shape of silica is like grains of sand and it is one of the materials found in brick soil. Sand and silt is formed from quartz obtained from igneous rocks that decay after some time. So in all soils, some sand is always found. Alumina: Alumina is a soft and malleable part of soil that absorbs water and forms a paste. Alumina melts during baking and causes a fragment of the object. Feldspar: Feldspar is the melting agent of brick. This material reduces the heat of brick paste to about 1100-1150 degrees Celsius. Limestone: If a small amount of limestone is used in the brick soil and it is round, the color of the brick will lighten and it will not harm it. The permissible amount of lime for brick is 30%, if this limit is increased, the melting point of the brick will decrease and the brick will be welded in the form of brick in the heat of the furnace. Coarse-grained limestone in clay soil produces carbon dioxide when fired in a gas furnace, making lime viable. After being caught, quicklime turns into slaked lime and cracks the brick, and becomes so-called aluek. Plant materials: If these materials are present in the soil, they will burn in the oven during the baking of bricks and will cause empty space in the brick and as a result, the brick will be hollow.. When the parts come out of the forming machines, they carry a significant amount of moisture. Drying the raw clay before baking it is to prevent large deformation and cracks on the surface of the clay, and it also prevents spending more fuel in the main furnace and the possibility of getting soot in the furnace due to high initial humidity and incomplete combustion. (In the factory in the traditional way 1-2 weeks and 36 hours in the factory by the industrial method. Drying causes shrinkage and this shrinkage is allowed to the extent that the final product has a suitable and desired size. 
how to make calcium silicate bricks
Bricks are prepared and made in different types, and each of them has its own special uses according to the type of special features that they have. In general, the age of using bricks in construction and architecture dates back many years ago and is considered one of the primary materials used in architecture. The first type of brick can be considered clay bricks, which are several thousand years old. Bricks can be used as filling materials for walls, ceilings, etc., and create a strong connection in the building. The beauty and variety in the design and color of brick have made it to be used in the interior and building. Undoubtedly, brick is one of those materials that has kept the color and smell of soil alive for us. One of the characteristics of traditional and authentic Iranian architecture is the use of materials such as brick. Even in the Iranian architecture of the past, the arrangement and placement of bricks have been done in different ways and this gives the building a special beauty. Even today, by studying the mysterious Iranian architecture, such arrangements, which were in the form of arches, vaults, and domes, are used symbolically and decoratively in interior and exterior architecture. 
In this article, we intend to explain the method of making refractory cement. Fire clay or fire clay is a type of clay that can resist fire without cracking or vitrification. This type of heat is about the heat of a furnace, which has a temperature equal to 1500 degrees Celsius. In the previous article from Ara Seng Elvand site, we introduced you to what refractory soil is and what it is used for. In this article, we introduce you to the ingredients, purchase and price of fireclay, as well as the method of preparing fireclay. Refractory soil ingredients To learn more about the method of making refractory cement, it is better to first talk about the types of soil that are used to prepare it. kaolin This type is one of the clays that remained in the place of origin and is the most important type of primary kaolin clay or Chinese soil. This type derives its name from kao-Linng, which means high mountain, and its main mineral is kaolinite. Of course, there may also be quartz, mica and feldspar in it. Kaolins have coarser grain size and less plasticity, but they have high purity. For this reason, their color is white after baking and they have a slow melting time of around 1750. 
is there silica in red brick
The purpose of raw material preparation is the process that is applied to the raw materials after they enter the factory. This work is the first step in the production line of factories and includes crushing and grinding of materials. This stage is different for soft and hard materials, as plastic materials and soft raw materials have very fine granularity and do not need to go through the crushing stage. But in the case of materials like silica, this is not the case, and longer steps must be taken to use it in the brick body. Due to the fact that the ingredients of refractory soil include silica, feldspar, etc., which are all hard materials, crushing and grinding steps should be used for its preparation. They use crushing for coarse corn and grinding for smaller materials. Meanwhile, materials such as flint and quartz are calcined before these steps. Sintering is a process that first heats the material at a temperature of about 900 degrees Celsius, and this process causes cracks in quartz and flint pieces. Finally, its lumps are prepared for the grinding and crushing stage. In the calcination process, some carbon and water in the flint is removed and cause the specific weight of the flint to decrease. 
. - Sand: which is obtained from the effect of weathering erosion on siliceous stones, is actually the skeleton of bricks. If its amount increases, the brick will become brittle and crack, and the coarse grains of sand in the brick will expand during baking and cause small cracks in the brick. - Khashag flower: This is prepared by adding water to the amount of about 8 to 12% of the weight of the raw material and is formed with the help of a clay press. Many industrial bricks and construction pottery are made by the dry mud method.