pan granulation process

What types of limestone powder granulators for your choice

Posted on March 26, 2024 by grxksr

Limestone powder granulation machines play a pivotal role in the agglomeration process, which converts fine limestone particles into granules, making them easier to handle and use in various industrial applications, including construction materials, agriculture, and environmental projects. When choosing a limestone powder granulator, it’s vital to consider the specific requirements of the process, including the desired size of the granules, production capacity, energy efficiency, and maintenance needs. Below we explore several popular granulator options suitable for limestone powder processing.

Rotary Drum Granulator

Overview and Application

A rotary drum granulating machine is a widely used type of equipment for large-scale production. It operates by tumbling limestone powder with a binding agent inside a rotating drum. The motion causes the powder to gradually form into spherical granules.

Advantages and Drawbacks

This granulator is known for its high capacity and robust design, which can handle a considerable volume of material. However, its size and energy consumption could be potential drawbacks for smaller operations or those seeking more energy-efficient solutions.

limestone pellets rotary drum granulator

Disc Pelletizer

Overview and Application

Disc pelleting machines consist of a rotating disc that angles to create a rolling motion, encouraging the accumulation of limestone powder into balls. These machines are suitable for a range of granule sizes and offer adjustable parameters to control the outcome.

Advantages and Drawbacks

Their flexibility and scalability make disc pelletizers a popular choice for varying production needs. They do, however, require close monitoring to ensure consistency and can be less energy-efficient than other granulators.

Extrusion Granulator

Overview and Application

Extrusion granulation equipment work by forcing limestone powder through a die using screws, forming elongated granules that can be easily broken into smaller pieces. This type of granulator is ideal for creating a specific granule shape and size.

Advantages and Drawbacks

Extrusion granulators provide excellent control over granule size and shape but can require more maintenance due to the wear and tear on the screws and die. They also tend to have lower throughput compared to rotary drum granulators.

Choosing the Right Granulator for Limestone Powder

Selecting the appropriate limestone powder granulator depends on several factors, such as the desired granule characteristics, production volume, and budget constraints. It is recommended to consult with equipment manufacturers or industry experts to evaluate the process requirements and make an informed decision. Proper selection and maintenance of the granulator will ensure efficient operation, high-quality granules, and a streamlined production process. If you want to setup a limestone pellets granulating line, we can also give you a solution.

how to compost pig manure

Posted on April 28, 2023 by grxksr

Composting pig manure is an effective way to transform a waste product into a valuable resource. Pig manure is high in nitrogen, phosphorus, and potassium, making it an excellent source of nutrients for plants. However, it can also be a source of pollution if not managed properly. In this article, we will discuss the steps for composting pig manure to create a nutrient-rich soil amendment for your garden.

Aniaml Manure for Organic Fertilizer Production

Step 1: Collecting Pig Manure

The first step in composting pig manure is to collect it. Pig manure can be collected using a shovel or a manure scraper. It is important to collect only the manure and not the bedding material, as the bedding material will slow down the composting process. Pig manure can be collected in a pile or a bin. If collecting in a pile, it is recommended to turn the pile regularly to ensure proper aeration and decomposition.

Step 2: Preparing the Composting Site

The composting site should be located in a well-drained area and away from water sources, such as streams or ponds. The site should be sunny, as the heat from the sun will help to accelerate the composting process. The composting site should be level and have good air circulation. The site should be prepared by removing any grass or vegetation, and a layer of gravel or wood chips should be added to the bottom to aid in drainage.

Step 3: Building the Compost Pile

The compost pile should be built in layers, starting with a layer of dry, carbon-rich material such as straw or leaves. This layer should be about 6 inches thick. Next, add a layer of pig manure, about 2 to 3 inches thick. Repeat this layering process until the pile is about 3 to 4 feet tall. The top of the pile should be covered with a layer of straw or leaves to help retain moisture.

Step 4: Maintaining the Compost Pile

The compost pile should be kept moist but not wet. If the pile is too wet, it may become anaerobic, which will slow down the composting process and create an unpleasant odor. The pile should be turned regularly to ensure proper aeration and decomposition. The pile should be turned every 3 to 5 days, or when the internal temperature of the pile drops below 100°F. The internal temperature of the pile can be measured using a compost thermometer.

Step 5: Harvesting the Compost

The compost pile will be ready to harvest when it has decomposed into a dark, crumbly, soil-like material. This process can take anywhere from 6 to 12 months, depending on the size of the pile and the environmental conditions. To harvest the compost, the pile should be turned onto a tarp or into a wheelbarrow. Any large pieces of material should be removed, and the compost should be screened to remove any remaining debris.

In conclusion, composting pig manure is an effective way to transform a waste product into a valuable resource. By following these simple steps, you can create a nutrient-rich soil amendment for your garden while reducing waste and preventing pollution. Remember to always wear gloves and wash your hands thoroughly after handling pig manure. Happy composting!

Of course, you can check this page for more details about the design and structure of the pig manure machine!

How to Compost Pig Manure

During the Pan Granulation Process, What Things Should Be Noticed?

Posted on August 26, 2019 by grxksr

There are several different methods of making fertilizer. The job of fertilizer is to replace the chemicals that growing plants leech out of the soil. The key ingredients of a fertilizer, therefore, are things that are essential to the healthy growth of plants – such as nitrogen, calcium, sulfur, and magnesium.

Fertilizer Manufacturing and Pan Granulation

The way that fertilizer is made has evolved a lot over the years. The pan granulation process was introduced in the 1970s by Norsk Hydro as a way to produce large amounts of coarse grade ammonium nitrate-based fertilizer. This type of fertilizer is used for forest fertilization.

The process uses water-free melt, is inexpensive, and makes fertilizer that is easy to transport and store. The process requires hot nitrogenous melt, and cooled solids which are fed into a rotating pan.

The rotation of the pan will help to form the fertilizer into a rolling, tumbling particles which form a crescent-shaped bed. The cooled solid particles should enter the pan at a point where there is not a lot of existing material so that they can be covered by the melt. Warmer particles will tumble over the cooler particles to cover them, and as the material moves through and exits the pan it will stabilize at a temperature that is below the melting point of the material.

The objective is to gradually build up the size of the particles by rotating the solids so that they pick up melt, which cools onto them.

When to Use Pan Granulation?

Pan granulation technology was originally intended to use to convert dry pulverant and other material, into bigger granules that are easier to work with. When the process is performed properly, it should be seen that it produces strong particles that are of uniform size and a similar shape.

Temperature and Concentration

It is difficult to produce large pellets with pan granulation, but for smaller pellets, it is a good solution. Many common methods of pan granulation rely on the water content of the solution being about 5-8 percent by weight. This ensures that at the correct temperature a certain amount of water will evaporate rapidly, and the layer that is added to the process solidifies on the granules almost immediately. Note that if the water content is insufficient, then the rolling particles on the bed will become a sticky mass which is difficult to handle, separate, and transport. The water content is important to allow for the heat removal caused by evaporation since this is what keeps the granules in an optimum state.

The maximum concentration limit for the solution is 95 percent by weight, and this works well for melts of ammonium nitrate and urea, that is sprayed onto appropriately sized, fast-moving solids.

The size of the rotating drum, and the pressure with which the solution is sprayed onto the solids will also impact upon the outcome. The pan manufacturer will provide instructions for the appropriate speed, pressure and temperature depending on the type of fertilizer to be produced.