Double roller press granulation plant is widely used in compound and organic fertilizer production. It can turn powder material into granules at a lower cost. Because it adopts dry granulation method, which makes compound and organic fertilizer particles only by physical extrusion force. And there is nearly no water involved in complex and organic fertilizer making process. So you don’t need to spend on fertilizer pellets drying and cooling. In addition, it also has characteristics of less energy consumption, high granulation rate, easy operation, etc. This is the reason why more and more fertilizer choose double roller granulation line for their fertilizer plant. Moreover, SX can provide you with roller extrusion granulation lines with different capacities and design layout according to your actual conditions. If you are interested in it, you can contact us at any time.

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    Capacity: 1-3 t/h

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    Equipment material: Carbon steel Q235/ Alloy

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    Voltage: 220v/380v/415v/440v/480v(50Hz/60Hz)

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    Design: (Composter, dewatering machine) batching machine, crusher, mixer, granulator, screener and packaging equipment, etc.

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    Application: organic fertilizer or compound fertilizer

Sophie

Senior Plant Design Engineer

Learn more about setting up fertilizer plant

Contact us to get a fertilizer production line for your plant

How does double roller granulation plant to process compound fertilizer?

If you want to buy a fertilizer making line, it is necessary to know what equipment is needed in it. In general, a complete double roller granulation line consists of five stages, six types of fertilizer processing machines as follows:

Batching machine

During this process, you need to feed the various chemical powder according to required formula. The difference in material proportion is the reason why your fertilizer is different from others. So you need to focus on the accuracy of batching. In this case, SX automatic batching equipment is an optimal option for you. It is equipped with electronic scale and PID regulation and alarm system, which greatly contributes to improving batching accuracy.

batching equipment in double roller granulation plant
Single Shaft Mixer

Mixer

Mixer can help you mingle various chemical materials evenly to prevent nutrients imbalance. And for powdery blending, we can provide you with a variety of fertilizer mixers. You can choose a suitable one according to your needs. Then we have three type of mixers for your choice: horizontal mixer, double shafts horizontal mixer and single shaft blending equipment.

Roller granulation

This is the most important step in fertilizer roller extrusion granulation line. In this process, the mixed material will be granulated by extrusion force between two rollers. After pressing granulating, compound fertilizer is more convenient for transport and storage. Because granular fertilizer can prevent nutrients layering during transport and storage. Here, we design double roller granulators with different capacities for your choice.

double roller extrusion granulator
rotary screener in double roller granulation plant

Rotary granules screener

After granulation, in order to ensure the quality of compound fertilizer pellets you produce, it is advisable to sieve them with rotary screener. Which can separator required size compound granules from others. Then you can transport qualified granular compound fertilizer to the next process.

Packaging

Fertilizer packaging is the final stage of double roller pelleting line. In this stage, automatic packaging scale will bag granular complex fertilizer in 20kg/bag or 50 kg/bag in a short time. This is beneficial for transport and storage. And various packing capacities can meet different requirements for fertilizer suppliers.

packaging machine in doubel roller granulation plant

What other machines can make organic fertilizer in double roller press granulation plant?

In addition to the equipment mentioned above, what other equipment can help produce organic fertilizer granules?

solid liquid separator in double roller granulation line

Screw dewatering machine

For removing excessive moisture, screw dehydrator is your best choice. It adopts a stainless steel sieve with 0.3-0.5 mm holes, which can help you separate solids from excrement of livestock quickly. After dewatering, the water content of manure can be reduced to 30%-40%, which is more suitable for organic fertilizer making.

Composting machine

Composting plays an important role in removing harmful substances from manure. For fertilizer fermentation, there are 4 types of fertilizer composting machines for your choice. For starting  small scale composting in fermentation trench, we recommend you choose groove type composter. When you plan to start composting on the ground directly, you can buy windrow compost turner. In addition, if you want to finish composting of organic waste faster, the in-vessel fermentation tank is your optimal option. Finally, for large scale composting, wheel type composter is more suitable for you.

organic fertilizer making in groove type composter
organic fertilizer making in windrow composting equipment
wheel type compost turner machine for organic fertilizer making

Top 2 different scale of double roller pelleting lines in YUSHUNXIN

The capacity of double roller granulation line must be an item most fertilizer manufacturers pay attention to. Then what is the capacity of fertilizer making line? The answer is that it can produce fertilizer not only in a small scale but also in a large scale. Different capacity requirements have different project designs. Generally speaking, it can be divided into two cases:

1-3t/h small scale double roller granulation line

If you plan to start a small scale compound fertilizer plant, we can provide you with 1-3 t/h double roller granulation line. This fertilizer making line usually contains a static batching machine, a SXPJ-1600 disc mixing machine, a double roller pressing pelletizer, a granular fertilizer screener, an automatic packaging machine and belt conveyors. In addition, they are all controlled by an automatic electrical control system. Only 2-3 workers, you can keep the whole complex fertilizer granulation line running. And the smallest fertilizer roller extrusion line only needs 800㎡ for installation.

Larger scale roller pellet making line

But if you want to enlarge your complex fertilizer making scale, we also can offer you a suitable design of fertilizer roller extrusion granulation line. Because of the requirement of large output, you need to choose fertilizer processing machines with a large capacity. In this case, we recommend you choose dynamic automatic batching machine for batching and double shafts horizontal mixer for chemical materials blending. Then the largest capacity of double roller pelleting machine is 3 t/h, how to enlarge the granulation output? You can choose to increase the number of roller granulators. If you equip your fertilizer manufacturing line with four roller granulating machines. Then keep the double roller pelleting line running two shifts a day and 10 hours per shift. It can produce about 70,000 tons of granular compound fertilizer per year.

1-3tph small scale double roller granulation line
Larger scale roller pellet making line

How to buy double roller press granulation plant at a favorable price?

Price of this roller pressing granulation line also must be an item you focus on. And a complete SX double roller granulation line will cost $ 25,000-$ 60,000. Then how to buy it in an economical way? There are three tips for your reference.

Finding a leading fertilizer equipment manufacturer

General speaking, a leading fertilizer equipment supplier has mature technology and rich experience in fertilizer equipment manufacturing. So it can produce the equipment of the roller granulation line at a lower cost. Thereby it can provide you with high quality fertilizer machines at a owner price.

Looking for a source factory of fertilizer machine production

It is advisable to buy fertilizer machine you need from the source factory rather than the distributor. SX is a source factory of fertilizer equipment. If you choose to buy double roller pelleting line from it, we guarantee you don’t need to pay any extra charge.

Designing a reasonable layout for your compound fertilizer plant

The price of roller pressing granulation line usually varies according to its configuration. So a reasonable project design can help you set up fertilizer plant in an economical way. Here, SX can design project fro you out of charge according to your budget, factory space, capacity, etc.

How to prolong the service life of the roller granulator production line?

The use of the double roller press granulator production line has a certain life span. If you do not find and repaire in time, it will greatly reduce the production efficiency of the entire production line. Below I will detail possible problems and solutions.

For the double-roll extrusion granulation production line, its main equipment is the double-roll extrusion granulator. If there is a problem with this equipment, it will affect the entire production line.

After long-term use of the double-roll extrusion granulator, the surface of the roller skin will be worn or damaged due to the high pressure of the roller skin and the corrosion of the material. The surface of the roller skin is uneven after being worn. The semicircular ball socket gradually becomes shallow and flat. The distance between the two roller skins will also increase, and the compaction effect will become poor.Therefore, if the equipment has a long service life, you need to check the state of the roller skin regularly. Especially when you are not use it for a long time,you need to clean the surface of the roller skin. And then you can brush with waste engine oil to prevent the surface from rusting.

In addition, for the roller extrusion granulator, there is also the problem of demoulding. If the demoulding is not good, the material will stick to the roller skin, which will affect the particle forming and reduce the life of the whole machine. (Tips:The method of demoulding can be to use sawdust and a small amount of yellow sand to continuously squeeze between the roller skins until the surface of the roller skin is smooth and shiny. So that every time you can use the material. It can be demoulded smoothly and form high-quality finished granules. )

Not only the main equipment needs maintenance, but also you need to replace the vulnerable parts of other equipment regularly during the maintenance process. If you are not replace them in time, it will not only reduce the granulation efficiency, but also affect the service life of the equipment.

roller granulator

Therefore, improving the service life of related equipment will increase the service life of the entire production line.

Technology of roller compaction granulation production line

The double-roll granulation production line involves two aspects of process skills, please refer to the following introduction for details.

For the production of organic fertilizers, the materials you need to compost the materials in the early stage. In order to quickly heat up and decompose after composting, you can use an organic fertilizer fermentation tank for aerobic fermentation. 7 days can reach 50-60% moisture.

For the subsequent granulation stage, you can use a double-roll granulator. Using the dry granulation process can reduce the consumption of drying in the later stage and improve the efficiency.

These two processes play a huge role in the production line, making the quality of the produced particles better.

What are the benefits of using potassium sulfate as a raw material for granulation in a double-roll extrusion granulation line?

In a standard double-roll extrusion granulator production line, it is inevitable that there will be material return. Due to the characteristics of this kind of granulator – no drying extrusion granulation, the returned dry powder can easily form granules again. The molding rate of the powder with potassium sulfate added and returned after extrusion is improved, and the strength will also increase with the mixing of the sieved powder.

Because the sifted powder is extruded once, the particle size composition is different from the raw material particle size composition. There are more fine-grained materials that can fill the gaps between raw material particles during extrusion molding, so that the particle forming rate increases and the strength increases slightly. From this point of view, the secondary extrusion effect of potassium sulfate powder is better.

Of course, dry granulation is not completely free of moisture. Excessively low moisture will reduce the molding rate of potassium sulfate extrusion granulation. Excessively high moisture will not only cause too much potassium sulfate to stick to the roller skin and make demoulding impossible, but also increase the energy consumption of the post-drying process.

Therefore, the optimal moisture content of potassium sulfate powder is 1.2%,which leads to the highest particle forming rate and the best strength. This makes the pellets produced by the final production line of high quality.

Quotation for roller granulator production line

What customers care most about the production line is the price. But how to get a quotation for a double-roll granulation line? It is necessary to start with raw materials, output and equipment. Understand these clearly and get relevant data to determine the price.

double roller granulation production plant

We need to determine what raw materials you use to make the fertilizer. Because it is necessary to determine the compatibility with the double-roll granulator. It can only be produced if it meets the conditions. You need to understang the yield. We can calculate the quantity of equipment needed according to the size of the output.So that we can better meet the requirements of yours.

This is the key, directly understanding the needs of yours. According to your required equipment , we can give you the quotation.

After understanding the above, we can give a specific price. A double-roll granulator is about 2888$ – 6000$.The double-roll granulation production line needs 30,000-200,000 US dollars.

The above is the quotation of the entire double-roll granulation production line. If you need, you can come to consult.