Is it better to dry refractory soil naturally or to dry it by ignition and drying?

Refractory soil is the most basic and most commonly used refractory raw material, and it is also the refractory material that the people have the most contact with, that is, the soil used in the rural paste-fire stove, which is higher than the general soil refractory temperature, and his refractory degree is higher than 1580, which can be more resistant to burning. Refractory clay is made of kaolinite.

It is a natural aluminum silicate material that is the main mineral component, in powder form, and the color is generally gray to light yellowish red, with the impurities contained (such as iron oxide.

And different. And water is plastic, dried and calcined, in the form of dense lumps.

The reference index for refractory soil is aluminum oxide.

Al2O3) is generally about 30%, which varies according to the content. Because kaolin is produced all over the country.

There are many places, so the names are different. For example: clay, coke soil, Guangxi white mud, etc.

At present, Hebei, Henan, Guangxi, and Jilin are all produced, among which Guangxi white mud is the highest. **Ranging from 200-1200. The local ** in Hebei is about 200, and those who need it can contact Xiaoji Xi.

Refractory clay is the simplest refractory material, and because it is ordinary, it has an average value. However, with him as a raw material, the clay bricks made of ** doubled.

Refractory soil is of course the best to dry naturally.

Refractory clay: referred to as refractory soil. Clays with a refractory degree higher than 1580 are mainly composed of aluminosilicate minerals, which are generally gray to yellowish-red, depending on the impurities they contain (e.g. iron oxide).

And water is plastic, dried and calcined, in the form of dense lumps. It is mainly used in the manufacture of refractory materials such as refractory clay bricks, refractory crucibles, glass melting tanks, etc.

Clay-based refractory soil.

Folk point stove is a kind of soil used in the hearth.

1. Characteristics and uses: Clay refractory bricks are weakly acidic refractory materials, which have good thermal stability and are suitable for hot blast furnaces, various boiler linings, flues, smoke chambers, etc.

2. Product specifications and forms: standard-shaped, general-shaped, special-shaped and special-shaped bricks. Physical and chemical properties of clay refractory bricks.

Firebrick. Abbreviated as fire bricks. Refractories of a certain shape and size.

According to the preparation process, it can be divided into fired bricks, unfired bricks, fused bricks (fused bricks), and refractory insulation bricks; According to the shape and size, it can be divided into standard bricks, ordinary bricks, special types of turns, etc. It can be used as high-temperature building materials and structural materials for construction kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical actions at high temperatures.

For example, refractory clay bricks, high-alumina bricks, silica bricks, magnesia bricks, etc.

Foreground. With the continuous development of China's cement industry, higher requirements have been put forward for refractories. The refractory industry, which has long relied on extensive economic growth mode, should increase its adjustment efforts to meet the needs of the new situation.

The purpose of drying is carried out.

For special refractory products, except for the dry pressing forming body and hot pressing forming products, the green body formed by other methods does not need to be dried.

The purpose of drying is to remove moisture in the brick body, hardening organic binder or inorganic binder, which can effectively improve the bonding strength of the green body. Special refractories use different molding methods, the moisture in the green body varies greatly, can fluctuate in 15% 3%, if the final water content of the green body is not greater, different drying methods and different drying equipment must be used to ensure that no cracks are produced in the drying and firing process.

Factors that affect the drying effect.

1) The nature and structure of the material, the variety of special refractory products, the large difference in performance and the use of multi-level granular ingredients will affect the drying efficiency and effect of the products.

2) The size of the moisture content of the brick described by the molding method is required, and the size of the final residual moisture of the brick is required.

3) The shape, size, and single weight of the pressed bricks. For products with complex shape, large volume and single weight, it is advisable to use a low-temperature, long-term and slow drying method when drying.

4) Heating method and equipment structure used during drying.

Carry out the process of drying.

The drying process is basically divided into 3 stages, namely natural drying, heating drying and cooling stage. Natural drying is drying under natural ventilation for more than 24 hours, which can reduce the moisture content of bricks by 30% to 40%. This not only reduces the moisture content of the bricks, but also greatly reduces the evaporation rate of the moisture of the bricks, and can also reduce the energy consumption.

There are three types of heating drying according to its heating method: first, using air heating and drying or using waste heat drying; second, it is heated and dried by steam; Third, electric heating and drying are adopted. The heating and drying process can be divided into 3 stages:

That is, the initial isokinetic drying stage, the mid-velocity drying stage and the final moisture balance stage.