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Poultry feed hammer mill crushing equipment and technology of poultry feed materials

2021-01-05 Back to List

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Crushing is one of the most commonly used raw material pretreatment methods in poultry feed production process. Its purpose is to turn large particles (lumps) of raw materials into small particles and powder, which is convenient for poultry animals to digest and absorb. According to the particle size of the crushed materials, the crushing can be roughly divided into coarse crushing, fine crushing and superfine crushing.  

automatic machines for recycling food returned to poultry feed after sorting drying drying grinding and packaging

1. Principle and process of crushing

Crushing is the use of mechanical force to turn large-particle materials into small particles and powder. Common crushing forces include extrusion, impact, shear, friction, splitting, bending, etc.

According to the role of the material and the poultry chicken feed crushing machine, the material is gradually crushed into small particles through three forms in the poultry feed grinding process:

①The effect of the crushing working fluid on the material (the effect of the impact column/hammer/blade on the material);

②Motion The effect of the material on the working fluid (the effect of the material impacting the ring gear/tooth plate/sieve plate);

③The effect between the moving materials (the main form of action in the jet flow mill). 

2. Evaluation of crushing effect-crushing particle size

Our common expressions "coarse pulverization", "medium pulverization", "fine pulverization" and "fine pulverization" are not enough to describe the specific particle size of pulverization. The "fine pulverization" of one type of pulverizer may be another type The "coarse crushing" of the machine for grinding poultry chicken feed. Other vague expressions are: the corn particle size of suckling pig feed is φ1.0mm sieve-process description, there are differences in crushing models; the best particle size of aquatic product feed is 40-80 mesh-what is the pass rate?

Scientific representation method of crushed particle size: geometric average particle size Dgw, D50, particle size distribution frequency curve (visual illustration of crushed particle size). Usually a reasonable description is what is the percentage of sieving rate that passes through the standard sieve? For example, when corn is crushed to 750μm, the sieving rate of 20 mesh sieve is ≥50%, and 85% is distributed between 10-40 mesh.

The expression method of crushing uniformity: geometric standard deviation Sgw (the smaller the more uniform, the ideal state is 1). 

Method for detecting crushing particle size:

(1) Standard sieve method (applicable to coarse/medium/fine/micro/powder between 12-120 mesh);

(2) Particle size analyzer (suitable for micron powder/nano powder smaller than 120 mesh).  

small hammer mill machine to grind oyster shells for chicken feed

3. Factors affecting crushing effect  

The main factors affecting the crushing particle size are the characteristics of raw materials (such as moisture, fiber, protein and grease content, etc.), animal poultry feed rice wheat crusher (such as model, hammer, screen, auxiliary suction system, etc.).

(1) Physical properties of raw materials 

Feed ingredients are generally composed of starch, protein, fiber, minerals, oil, and moisture. The main factors affecting physical properties: air temperature, material temperature (the material has low temperature and brittleness, and the night crushing is more power-saving), the degree of difficulty of fine crushing: fiber>protein>starch>minerals. 

Oil and water affect the crushing particle size: the higher the oil and water content, the coarser the achievable crushing fineness. Common effective methods for processing high-moisture/high-greasy materials are: mixed crushing and freezing crushing.  

(2) The influence of poultry feed making machine grinding mill   

The impact of poultry chicken feed hammer mill grinder machine mainly includes crushing models and equipment conditions, etc. Different models are suitable for crushing under different conditions (as shown in Table 2). In addition, for the same model, taking the most commonly used hammer mill machinery for grinding poultry feeds as an example, the rotor speed, the number of hammers, thickness, sieve plate aperture, thickness and sieve hole arrangement, auxiliary suction, etc. will all affect its efficiency.

4. Recommendations for common poultry feed hammer mill crusher grinders     

(1)SFSP 56×40a mill for grinding poultry feeds

Capacity  Main Power  Speed
4-6T/H 37KW 2980r/min

①Host machine uses direct drive with automatic and uniform feeding mechanism, feeding amount can achieve automatic control.

②The main component rotor, can realize bi-directional rotation through the high precision dynamic balancing test.

③The hammer after special heat treatment has good quality, high grinding rate. The operation door is equipped with self-locking device, flexible and convenient, safe and reliable.

what should i know before coming up with my own chicken feed production plant

(2)SFSP 88×60 chicken poultry feed grinding machine

Capacity  Main Power  Speed
10-13T/H 110KW 2980r/min

①Used for the grinding of raw materials like organic garbage, drug residue, winery, sugar, etc.

②Used for the grinding of biological fermentation wet materials, like livestock and poultry excrement.

③The water allowable value of organic fertilizer materials reaches 25-55%, and particle size can reach the requirement of pelleting.

④Solve the problem of materials with high moisture, the grinding of organic materials treated by fermentation has better effect.

⑤High-speed rotating blade makes good grinding fineness, high efficiency and low energy consumption.

⑥Use high alloy wear-resistant hammer, more wear-resistant than ordinary hammer, and the service life of the hammer is increased.

5. More poultry feed processing equipment

In addition to the corn grinder for poultry chicken feed, what other poultry feed manufacturing equipment is needed for poultry feed production line? The following are the common main poultry feed mill equipments of poultry chicken feed lines:

(1)Poultry feed mixing equipment

Various indicators comply with international standards

Good mixing effect: Cv = 2.5%, the residue≤0.1%

Fast mixing speed: mixed cycle 30s~120s

Many kinds of liquid and solid can be added at the same time. The spraying is accurate and the control is convenient.

(2)Poultry chicken feed pellet making machine with ce

Poultry feed pellet milling machine permits to transform a meal, fibre or small granules product or mixture into pellet.

The product forced by the rollers through the holes of the die, comes out in the form of small cylinders.

(3)Poultry feed pellet cooler

We produce a wide range of counter current coolers: machines that are used for the cooling of the pellet. The pelleted product goes from a temperature higher than 60°C to approximately +5°C in respect to the room temperature.

(4)Poultry feed pellet crumblers

We produce a wide range of crumblers: It is used to crumble the pellet after pelleting and cooling to obtain feed for small animals. Every crumb keeps the complete formula's characteristics, avoiding selection of feed from the animal.


We produce sieves of several models, they are used to remove the dust from the pellet before packing it or before bulk delivery.

RICHI's animal feed factory projects have covered many provinces, cities, autonomous regions all around China, with business covering over 100 countries and regions such as Southeast Asia, the Middle East, Africa, Europe, Oceania, South America, etc. RICHI has offered more than 1200 animal feed pellet mill equipments to 65% of Chinese animal feed factories and constructed over 1000 turnkey projects worldwide covering fields of poultry and livestock feed, straw renewable energy, comprehensive utilization of agricultural and sideline products, breeding projects, poultry meat processing, compound fertilizer project, garbage treatment, etc. With increasing innovation and development on feed machinery industry for over 25 years, RICHI has been one of the famous feed machinery factory in China.

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