The feed pulverizer is mainly used to pulverize various feeds and various roughages. The purpose of feed pulverization is to increase the feed surface area and adjust the particle size, increase the surface area and improve the palatability, and easily contact with the digestive juice in the digestive tract, which is beneficial to improve the digestibility. Better absorb nutrients from feed. Adjusting the particle size on the one hand reduces the energy consumed by the chewing of livestock and poultry, and on the other hand, it is more convenient to transport, store, mix and granulate, and the efficiency and quality are better.
Choose feed mill according to production capacity
The specifications and the nameplate of the general pulverizer contain the determined production capacity (kg/h) of the pulverizer, but there are several points to note:
1. The rated production capacity refers to the output under certain conditions. For example, the grain feed mill means that the crushed raw material is corn, the water content is safe moisture storage (about 13%), and the diameter of the sieve is 1.2 mm. Since corn is a commonly used grain feed, a sieve having a diameter of 1.2 mm is the smallest commonly used sieve, and the production capacity is small at this time, which takes into account the more difficult state in production.
2. The production capacity of the selected crusher should be slightly larger than the actual required production capacity. Otherwise, the wear of the hammer and the leakage of the air duct will increase the production capacity and affect the continuous production and supply of the feed.
Select feed mill according to crushed raw materials
For crushing grain feeds, hammer mills with top feed can be selected; claw mills can be selected for crushing bran grain wheat feed; if versatility is required, crushed grains are the main And taking into account the cake valley and straw, you can choose the tangential feed hammer mill; crush minerals such as shells, you can choose shellless sieve crusher; if used as premix feed pretreatment, the size of the product is required to be crushed. If it is very fine and can be adjusted according to the needs, special non-screen crusher should be used.
Select the feed mill according to the discharge method
There are three ways to pulverize the finished product through the discharge device: self-weight blanking, vacuum suction and mechanical conveying. Small single machines use self-weighting to reduce the structure. Most of the medium-sized pulverizers have a vacuum suction device. The advantage is that it can absorb the moisture of the finished product, reduce the humidity in the finished product and facilitate storage, improve the pulverization efficiency by 10%~15%, and reduce the dusting degree of the crushing chamber.
Select feed mill according to matching power
The machine's instruction manual and nameplate contain the kilowatts of power of the motor of the crusher. It often indicates not a fixed number but a certain range. For example, the 9FQ-20 type pulverizer has a supporting power of 7.5 kW to 11.0 kW; the 9FQ-60 pulverizer has a supporting power of 30 kW to 40 kW. There are two reasons for this: First, there is a big difference in the power required when the pulverized raw materials are different. For example, under the same working conditions, smashing sorghum is twice as powerful as smashing corn; second, when switching to different sieves At the time of the hole, the load of the pulverizer has a great influence. Therefore, when the 9FQ-60 type pulverizer uses a sieve with a diameter of 1.2 mm, the motor capacity should be 40 kW. When switching to a sieve with a diameter of 2 mm, a 30 kW motor can be used, and a 3 mm diameter hole is a 22 kW motor, otherwise it will cause some waste.
Choose feed mill according to energy saving situation
The energy consumption of the pulverizer is very large, and energy conservation should be considered when purchasing. According to the standards of the relevant departments, the hammer mill will not produce less than 48 kg per kWh when crushing corn with a sieve with a mesh diameter of 1.2 mm. The output of the domestic hammer mill is much higher than the above regulations, and the quality has reached 70-75 kg / kWh. The power machine manual and the nameplate of the pulverizer are marked with the power kilowatts of the motor of the pulverizer. The indicated power kW is often not a fixed number but a range. For example, the 9FQ-20 pulverizer is 7.5-11 kW; the 9FQ-60 pulverizer is 30-40 kW.
There are two reasons for this. First, there is a big difference in the power required when the pulverized raw materials are different. For example, under the same working conditions, smashing sorghum is twice as powerful as smashing corn; second, when changing to different meshes At the time, it has a great influence on the load of the pulverizer. When the 9FQ-60 pulverizer uses a sieve with a mesh diameter of 1.2 mm, the motor capacity should be 40 kW; when replacing the sieve with a mesh diameter of 2 mm, the motor capacity should be 30 kW; the replacement mesh diameter is 3 mm. When the screen is used, the motor capacity should be 22 kW, otherwise it will cause some waste.
According to the standards of the relevant departments, the hammer mill will not produce less than 48 kg per kWh when smashing the sieve with a diameter of 1.2 mm. The quality has reached 70 kg to 75 kg per kilowatt hour.
Choose feed mill according to dust and noise
The dust and noise in feed processing are mainly from the pulverizer. These two indicators should be fully considered in the selection. If you have to use a crusher with high noise and dust, you should take noise reduction and dust-proof measures to improve the working environment and help the health of the operators.
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