Fly Ash Aggregate Production Line Suppliers

Fly Ash Aggregate Production Line is a kind of process to produce LECA from fly ash. The disposal of fly ash become the environmental problem for the enterprise and country. The current environmental protection approach is to produce lightweight expanded clay aggregate from fly ash.

Fly ash, also known as "pulverised fuel ash" in the United Kingdom, is one of the coal combustion products, composed of the fine particles that are driven out of the boiler with the flue gases.

Lightweight expanded clay aggregate (LECA) or expanded clay (exclay) is a light weight aggregate made by heating clay to around 1,200 °C (2,190 °F) in a rotary kiln. The yielding gases expand the clay by thousands of small bubbles forming during heating producing a honeycomb structure. LECA has an approximately round or potato shape due to circular movement in the kiln, and is available in different sizes and densities. LECA is used to make lightweight concrete products and other uses.

At present, the mature process of LECA preparation by fly ash has four methods, rotary kiln, sintering machine, waterfall rotary kiln, sintering furnace. Except for the technology of rotary kiln, the ash consumption of lightweight expanded clay aggregate reach above 80% through other methods, but it is not suitable used for lightweight aggregate concrete, because of high bulk density and low cylinder pressure intensity after sintering. However, it has the features of lighter bulk density bulk density and higher strength, through the sintering of rotary kiln. However, the ash consumption only can reaches 30%. How to combine the above processes to achieve the requirements of lightweight aggregate concrete, which has been the difficulty of the production of LECA from fly ash.

After several years’ development, Henan Zhengzhou Mining Machinery Co., Ltd explores a new way to make the ash consumption reach 90%, which could meet the strength requirements. Through the new technology, the fly ash could achieve the performance parameters are as follows:

Bulk density: 700 ~ 900kg / m³;

Cylinder compression strength: 10 ~ 15Mpa;

Water absorption (1h water): 5 ~ 10%;

Fly ash concrete bulk density: 1800kg / m³;

C50 (high strength concrete);

The performance of LECA by ZK new technology is superior to other process, which also could reduce 10% of heat consumption. The market price of LECA produced by new technology is also higher than other processes. The new process of ZK LECA rotary kiln could reach 90% of the ash consumption and could achieve a high strength standard.

If you have any questions about the investment cost, production process about the LECA production, you are warmly welcome to contact with you directly. As a fly ash aggregate production line supplier, we will provide you a customized solution according to your requirements.