Shale Ceramic Sand production process is generally divided into five stages: raw material preparation, drying, preheating, roasting and cooling. Shale raw ore is crushed by jaw crusher, then screened to select 3mm*- 5mm size particles, next fed into the preheated kiln for preheating. The warm-up is completed immediately fed into the rotary kiln already at the target temperature roasting. After the calcination, Shale Ceramic Sand was obtained by cooling at room temperature.

Shale raw material drying, preheating, baking, cooling time and temperature called Ceramic Sand roasting system.Of each factor in the the ceramsite preparation process will have an impact on the quality of the ceramsite.

The following will introduce the the Ceramic Sand preparation process of various factors impact on the the ceramsite finished performance.

1. Preparation of raw materials: the ceramsite production must first be resolved is the processing of raw materials and pelleting process, its mandate is the acquisition of raw materials, crushing, screening, ingredients, blend the chemical composition to meet the requirements, uniform quality hydrous materialsmade from the raw material of different particle size and then roll into a ball, and other methods. A lot of raw material preparation process, according to the different varieties of raw materials into dry plasticizing Act, grinding into a ball method and mud into a ball method.

1, raw material preparation: the ceramsite production must first resolve the raw materials processing and pelleting process.

The acquisition of raw materials, crushing, screening, ingredients, blend the chemical composition of aquifer materials meet the requirements of uniform quality, then roll into a ball, etc. made from the raw material of different particle size.

There are a lot of raw material preparation process, according to the different varieties of raw materials into dry plasticizing Act, grinding into ball and mud into a ball.

2. Preheat: dry process without drying, crushing and screening, to enter the warm-up phase, the temperature of the warm-up phase control between **0 °C ~ **0 °C.

During preheating stage, drastic temperature changes will cause the burst of raw material, which led eventually fired ceramsite performance decline;

Second control the amount of gas generated during the raw material firing stage, because the raw material in the preheating stage, the organic matter and carbonates of raw meal had started to decompose volatile gas is generated, then the preheated raw material in the firing stage generated the amount of the gas will be reduced;

Again is a living material surface softening to prepare.

 3. Roasting: roasting stage is the most critical step in the entire haydite roasting process, it will directly affect the performance of the products to ceramsite.

If not properly controlled, cause the gas pressure is too large and overflow shell formation of the disadvantages of the open pore, leading low fired Ceramic Sand strength, water absorption.

If the calcination temperature does not reach the optimum calcination temperature, the expansion multiples of ceramic products will decreased, the apparent density becomes large.

 4. Cooling: the cooling process ceramsite quality has a greater impact, is generally believed that the the reasonable the ceramsite cooling system: ceramsite calcined at the highest temperature expansion with rapidly cooled to *0 ° C to **0 °C; butfrom **0 °C to **0 ° C, slow cooling is required because of the rapid cooling, so that the the ceramsite internal and surface to produce a powerful temperature shrinkage stress, causing its surface a mesh fine cracks, reduction in strength of the the Ceramic Sand particles, but inthey can be quickly cooled down below **0 °C.

Cooling: the cooling process has a greater impact on the quality of ceramsite. General the reasonable ceramsite cooling system: ceramsite calcined at the highest temperature expansion with rapidly cooled to *0 ° C to **0 °C;

But from **0 °C to **0 ° C,it is required to slow cooling, because of the rapid cooling, the ceramsite internal and surface temperature is generated powerful shrinkage stress, resulting in its surface a mesh fine cracks reduced particle strength, but below **0 °C can be quickly cooled.