RDF fuel rotary kiln is a rotary kiln product that uses refuse-derived fuel (RDF) as fuel. Refuse-derived fuel (RDF) refers to waste-derived fuel, also known as Solid recovered fuels (SRF), which can be granular, columnar, or honeycomb in shape. The fuel manufacturing plant sorts out waste plastics, waste slag, wood chips, PVC, etc. from general garbage, and after crushing, drying, pressing, and solidification, it becomes harmless RDF solid fuel.
Cement Kiln System with RDF Fuel
RDF rotary kiln is mostly used for cement manufacturing in cement plants. Refuse-derived fuel (RDF) can be used in cement plants in two main ways, direct combustion, and conversion to producer gas.
Direct combustion of RDF in preheaters/precalciners and rotary kilns by partial substitution of fossil fuels used to increase raw meal temperature. This can be achieved in two ways: first, crushed and pulverized RDF is mixed with coal or petroleum coke for kilns, and second, solid block RDF is fed directly into the RDF fuel rotary kiln and/or preheater/precalciner combustion chamber.
RDF can also be converted to producer gas and co-fired in a kiln using gas burners. We call the unit systems RDF fuel cement kiln systems, which use RDF fuel, and the unit usually consists of the RDF cement kiln, RDF preheated calciners, RDF preheaters, and ancillary equipment.
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Why Choose RDF Fuel Rotary Kiln For Your Cement Plant?
Cement producers all over the world are trying to reduce production costs. One effective way to achieve this is by using alternative fuels(AF). This can lead to an increase in the net reduction in global CO2 emissions, thereby reducing CO2 emissions. As alternative fuels are usually cheaper than traditional fossil fuels, RDF-fueled rotary kilns are more popular with cement plants.
The clinker production process of the cement rotary kiln system creates favorable conditions for the use of alternative fuels. These include high temperatures, long residence times, oxidizing atmospheres, alkaline environments, ash retention in the clinker, and high thermal inertia. These conditions ensure that the organic part of the RDF fuel is destroyed and the inorganic part (including heavy metals) is captured and incorporated into the product. When RDF is used as fuel, the combustion ash of RDF generally needs to be disposed of, which will undoubtedly increase operating costs. Researchers have developed an RDF rotary kiln with low operating costs, using RDF combustion ash as a raw material in cement manufacturing, thereby canceling the RDF combustion ash treatment process and reducing operating costs.
| Model | Specification(mm) | Capacity(t/h) | Slope(%) | Rotate Speed(r/min) | Motor Power(kW) | Weight(t) |
|---|---|---|---|---|---|---|
| YZ1225 | φ1200×25000 | 3 | 4 | 0.53-5.25 | 22 | 34 |
| YZ1632 | φ1600×32000 | 3.5 | 4 | 0.53-5.25 | 15 | 46.82 |
| YZ1828 | φ1800×28000 | 4 | 4 | 0.28-2.84 | 30 | 59.39 |
| YZ1845 | φ1800×45000 | 4.5 | 4 | 0.28-2.84 | 30 | 80 |
| YZ1636 | φ1600×36000 | 1.2-1.9 | 4 | 0.26-2.61 | 22 | 51.023 |
| YZ1939 | φ1900×39000 | 1.6-3.4 | 4 | 0.31-2.82 | 37 | 70.704 |
| YZ2044 | φ2000×44000 | 2.4-4 | 3.5 | 0.22-2.26 | 37 | 97.135 |
| YZ2245 | φ2200×45000 | 3.2-5.3 | 3.5 | 0.23-2.25 | 45 | 125.462 |
| YZ2550 | φ2500×50000 | 6.2-7.4 | 3.5 | 0.68-1.45 | 55 | 179.606 |
| YZ2555 | φ2800×55000 | 7.3-9.8 | 3 | 0.79-2.38 | 55 | 191.203 |
| YZ2820 | φ3000×20000 | 15-18 | 4 | 0.8-1.45 | 75 | 186.373 |
| YZ3028 | φ3000×28000 | 18-23 | 4 | 0.8-1.45 | 75 | 180.737 |
| YZ3060 | φ3200×60000 | 16-20 | 3.5 | 0.49-2.41 | 90 | 272.510 |
| YZ3226 | φ3200×26000 | 22-27 | 4 | 0.8-1.45 | 90 | 185.107 |
| YZ3255 | φ3500×55000 | 17-23 | 3.5 | 0.1-1.52 | 75 | 271.637 |
| YZ3529 | φ3500×29000 | 28-40 | 4 | 0.16-1.38 | 110 | 238.031 |
| YZ3560 | φ4000×60000 | 42-50 | 3.5 | 0.65-2.25 | 125 | 347.872 |
| YZ4030 | φ4000×30000 | 52-70 | 4 | 0.38-3.52 | 160 | 415.103 |
| YZ4060 | φ2200×60000 | 55-78 | 3.5 | 0.38-3.52 | 315 | 514.223 |
| YZ4262 | φ4200×62000 | 80-105 | 3.5 | 0.38-3.52 | 315 | 541.615 |
| YZ4565 | φ4500×65000 | 110-140 | 3.5 | 0.38-3.52 | 420 | 609.526 |
| YZ4772 | φ4700×72000 | 150-190 | 3.5 | 0.38-3.52 | 550 | 795.325 |
Precautions for Use of RDF Rotary Kiln System
After using RDF instead of fuel, the emission of waste gas from cement kiln production should be lower than that of burning traditional fuel.
The quality of the produced cement should remain unchanged. The quality of clinker, cement, and concrete products produced by the RDF cement rotary kiln system must meet the qualified standards.
Companies that provide cement kiln co-processing services must have qualified relevant qualifications.
The quality of the RDF used is guaranteed, and the fuel transportation and use will not have a negative impact on the atmosphere, the surrounding environment, and human health.
Why Choose Us?
We have more than 20 years of experience in cement equipment research and development and production and can supply coal fuel rotary kilns, oil fuel rotary kilns, gas fuel rotary kilns, electric-heated rotary kilns, and other rotary kiln products that support various fuel forms.
We have service experience in Alternative Fuels (AF) fuel rotary kiln co-processing systems for various cement rotary kiln production systems. We have provided co-processing services for rotary kiln systems with different fuels such as Petroleum coke (petcoke), sewage sludge, tire-derived fuel (TDF), meat and bone meal (MBM), agricultural biomass, etc. for customers from different countries.
If technical conditions permit, any cement plant can use RDF rotary kiln for cement production. The quality, type, and quantity of fuel have a profound effect on the quality of the clinker produced. According to different waste content and processing methods and degrees, refuse-derived fuels are divided by ASTM into seven types: RDF-1, RDF-2, RDF-3, RDF-4, RDF-5, RDF-6, and RDF-7. Different types of RDF have different properties and are used in cement manufacturing and it is important to know their energy and ash content as well as moisture and volatile content. AGICO is an expert in this field, we can help you choose the right RDF type, which is crucial to achieving the best production efficiency of your RDF cement rotary kiln system.