Wood Powder Grinding Machine

A wood powder grinding machine, sometimes referred to as a wood pulverizer or wood powder maker, is a type of specialized milling equipment used in the chemical industry, breeding, biomass energy, Chinese herbal medicine, wood processing, and other fields to turn fibrous, brittle, and tough materials like wood, branches, bark, and straw into powdered final products. The wood powder grinding machine is primarily made for processing wood and similar fibrous materials, but it can also handle a wide range of other materials with the appropriate modifications. This is in contrast to modest home-use grinders or specialist equipment like herb and black pepper grinders.

Because processed materials can have a variety of characteristics, such as being high in fiber (like wood and straw), brittle (like bark and dry branches), or mixed with hard impurities, the industry has created a range of grinding tools, such as hammer mills, ultrafine grinders, and cryogenic grinding machines, to suit various processing requirements. From tiny portable electric grinders to massive industrial versions like 500KG grinders, these machines come in a variety of sizes and functions. To ensure longevity and hygienic conditions, the majority of them use stainless steel components.

Core Working Principle

A wood powder grinding machine uses a variety of forces in its grinding operation rather than just one. This can better accommodate the intricate characteristics of wood materials than the straightforward impact grinding of an air-cooled crusher or the cutting grinding of a cutting type grinder.

When materials enter the grinding chamber, they are subjected to the combined action of high-intensity impact force, compression force, cutting force, and friction force generated by the high-speed rotating rotor, blades, or grinding rollers to achieve material crushing. The high-speed rotation of the rotor is driven by a motor, and some large models are also equipped with a charger to ensure stable power supply during long-term operation. After being crushed, the materials are carried by the air flow to the analyzer (classification device) for separation. The powder that meets the fineness requirement enters the collection system, while the unqualified powder returns to the grinding chamber for further grinding until the required fineness is achieved.

In this process, the air flow not only transports materials but also plays a role in cooling the grinding chamber, which is similar to the cooling principle of a Dry Grinder. For heat-sensitive materials mixed with wood, such as some herbs or mushroom, the cooling effect can prevent material deterioration caused by high temperature during grinding. Some advanced models are also equipped with a dust collector grinder to collect the dust generated during the grinding process, ensuring a clean working environment.

Main Equipment Types

Wood powder grinding machines may be broadly classified into two basic categories based on the variations in their constructions and grinding principles. Various subdivided models have been produced based on these types. The processing requirements of various wood materials and production scales may be accommodated by the distinct qualities and range of applications of each kind.

1. Horizontal Hammer Mill Wood Powder Machine

This is a traditional and widely used model, which belongs to a type of Hammer Mill and is similar in structure to some Industrial Weed Grinder but is more suitable for wood processing. It is widely used in small and medium-sized wood processing factories and rural areas due to its simple structure and low cost.

Working Principle: It mainly relies on the high-speed rotating hammer blades to strongly impact and shear the materials to break them. After being hit by the hammer blades, the materials collide with the toothed plate on the inner wall at high speed to undergo secondary crushing, and finally are filtered and discharged through the screen. The fineness of the finished product can be adjusted by replacing screens with different apertures, which is simple and convenient to operate, similar to the fineness adjustment method of a Dry Fruit Powder Grinder Machine.

Structural Features: It is usually composed of a machine body, a rotor (with hammer blades), a screen, and a motor. The parts in contact with materials are mostly made of stainless steel to avoid rust and material pollution, which is consistent with the material requirements of food-grade equipment such as a coffee grinder and a flour grinder.

Subdivided Models: Including standard wood powder machine, Ultrafine Grinder wood powder machine, water-cooled wood powder machine, stainless steel wood powder machine for Chinese herbal medicine, etc. Among them, the water-cooled model is equipped with a water circulation cooling system, which can effectively reduce the temperature of the grinding chamber, similar to the cooling design of a dry ginger grinding machine and a licorice grinding machine.

Application Scope: It has a good crushing effect on general materials such as wood, straw, corn cobs, and branches. It can also be used to crush some non-wood materials such as bean straw and tobacco stems by replacing the screen. However, it is not suitable for processing materials with high hardness such as metal and bone.

2. Vertical Roller Grinding Wood Powder Machine

This is an efficient and energy-saving model integrating multiple grinding principles, especially suitable for ultra-fine grinding. It is a kind of universal grinder that can not only process wood powder but also handle materials such as spice, tea, and medicine, with strong versatility.

Working Principle: It integrates multiple effects such as centrifugal grinding, impact grinding, shear grinding, and extrusion grinding. Materials are crushed by the strong rolling pressure and shear force between the grinding roller and the grinding ring. Its top is usually equipped with a high-precision classification device, which can realize precise control of fineness, similar to the classification principle of an airflow pulverizer and a vibrating pulverizer.

Structural Features: It adopts a vertical structure, which covers a small area and integrates grinding and classification. The whole machine is made of stainless steel, which is easy to disassemble and clean, and meets the hygiene requirements of processing materials such as food and medicine. Some models are also equipped with a Vacuum Mill function to further improve the grinding effect and avoid material pollution.

Core Advantages: First, it has high output and efficiency. Compared with the traditional horizontal Hammer Mill, the output can be increased by 150% to 300%, which is suitable for large-scale industrial production and can be matched with models such as 200KG grinder and 500KG Grinder. Second, it has a significant energy-saving effect. Under the same output and fineness, its energy consumption is much lower than that of other types of mills, such as a turbo grinder and a high-speed grinder.

In addition, it has good product fineness and a wide adjustable range, especially suitable for processing wood chips and fibrous materials, with the finest fineness up to more than 600 meshes, which is comparable to the grinding effect of an Ultrafine Grinder. It also has a cooling function, with low temperature during grinding, suitable for processing heat-sensitive materials such as some herbs and mushroom. At the same time, it is equipped with an efficient dust collector, which can realize negative pressure production without dust leakage, meeting environmental protection standards, similar to the dust removal design of a Dust Grinder and a dust collector grinder.

Equipment Structure and Key Components

The main machine, auxiliary system, and unique design are the components that make up a conventional wood powder grinding machine. Each of these components is crucial to the equipment’s proper operation and processing impact. Although they have been tuned for wood processing, their parts are comparable to those of other grinding machines like a coarse crusher and a cassava grinding machine.

1. Main Machine Part

The main machine is the core crushing unit, which is composed of an upper machine body, a middle machine body, and a lower machine body. Crushing tools are installed inside: the horizontal machine uses hammer blades (similar to Hammer Mill), and the vertical machine uses grinding rollers and grinding rings (similar to Ultrafine Grinder). For example, some models are equipped with three different types of crushing tools, such as type 7 knife, type 1 knife, and centrifugal knife, to achieve the triple effect of coarse crushing, fine crushing, and centrifugal re-grinding.

The main machine is usually made of high-strength stainless steel, which can resist the wear caused by long-term grinding of wood fibers and avoid rust. This material is also widely used in food-grade grinding equipment such as a sugar grinder, a salt grinder, and a meat grinder to ensure product safety.

2. Auxiliary System

The auxiliary system is an important part of the wood powder grinding machine, which includes a fan system, an analyzer (classification device), a powder collector (cyclone separator), and a dust collector, and some large models are also equipped with a charger to ensure stable power supply.

Fan System: It provides the air flow power required for grinding and material transportation. The air flow generated by the fan not only carries the crushed materials to the analyzer but also cools the grinding chamber, which is similar to the cooling principle of an Air cooled crusher. Some models are also equipped with an airflow pulverizer to improve the grinding efficiency and fineness.

Analyzer (Classification Device): It controls the fineness of the discharged material by adjusting the rotating speed or angle. In the horizontal machine, the fineness can be changed by adjusting the air volume or the analyzer bolts; in the vertical machine, a stepless speed regulation classification impeller is usually adopted, which can adjust the product particle size without stopping the machine, similar to the adjustment method of a vibrating pulverizer.

Powder Collector (Cyclone Separator): It collects the finished powder in the air flow, which is the same as the collection principle of a Dry Fruit Powder Grinder Machine and a spice grinder. The collected wood powder can be directly used or further processed.

Dust Collector: It further purifies the tail gas to ensure that the emission meets the standard. The common one is a bag filter, with a dust removal efficiency of more than 99%, which is the same as the dust removal device of a Dust Grinder and a dust collector grinder. This can effectively reduce dust pollution and protect the working environment.

3. Special Design

Self-priming Feeding: It uses the negative pressure generated in the grinding chamber to automatically suck in materials. This way can avoid serious damage to internal tools caused by accidentally putting in hard objects such as metal blocks, which is a common protective design in grinding equipment such as a metal grinder and a bone grinder.

Water Cooling System: Many models adopt a double-layer machine body, and circulating tap water is injected into the interlayer to cool the grinding chamber and bearings, preventing materials from deteriorating due to high temperature. This design is also used in heat-sensitive material grinding equipment such as a cryogenic grinding machine and a dry ginger grinding machine.

Sound Insulation Design: The inner lining of the machine body is equipped with sound insulation materials to effectively reduce the operation noise, making the working environment more comfortable. This design is also widely used in small grinder machine and Electric Grinder for home and laboratory use.

Typical Technical Parameters

Models of wood powder grinding machines have different levels of performance. The reference parameter ranges of a few popular models are shown here to assist users in selecting the right machinery for their production requirements. Although these specifications are comparable to those of other grinding machines, including the 200KG and 500KG grinders, there are some specifics that change because of the nature of wood processing.

1. Feed Particle Size

Generally, the material size is required to be small. For wood chips, the feed particle size is usually 5-15 meshes; for larger particles such as thick branches and logs, the feed port size has certain limitations, and it is usually necessary to use a coarse crusher for preliminary crushing first. This is similar to the feed requirement of a cassava grinding machine and a corn grinder, which need to process large materials first.

2. Finished Product Fineness

The adjustable range is very wide, from relatively coarse 30 meshes to ultra-fine 1000 meshes, which can be adjusted according to actual needs. For example, the wood powder used for making artificial boards only needs 30-80 meshes, while the wood powder used for making high-end products such as medicine and cosmetics needs 200-1000 meshes, which is comparable to the fineness range of an Ultrafine Grinder and a turbo grinder.

3. Production Capacity (Output)

It ranges from dozens of kilograms per hour to thousands of kilograms per hour, depending on the equipment model and the required fineness of materials. Small grinder machine with a power of 7.5KW has an output of 50-100 kg/h, while large models such as 200KG grinder and 500KG Grinder have an output of 200-1000 kg/h, which is suitable for large-scale industrial production. Most of these large models have CE Certificate grinder qualification, meeting international production standards.

4. Main Machine Power

It covers a wide range, from 7.5KW small machines to 110KW large machines. Small machines are suitable for home use, small workshops, and laboratory research and development, similar to small Electric Grinder and herb grinder; large machines are suitable for industrial large-scale production, such as large wood processing factories and biomass energy plants, and usually need to be equipped with a stable charger to ensure long-term operation.

Application Scope

Wood powder grinding machines have a very broad range of applications in practically every industry where brittle or fibrous materials need to be ground into powder. It may be used as a universal grinder to process a variety of different materials in addition to being a professional piece of wood processing equipment. This type of equipment is extensively utilized in many industries, including the food, pharmaceutical, and chemical industries.

1. Wood Processing Industry

It processes various wood scraps, branches, bark, and board wastes into wood powder, which is used in artificial boards, papermaking, wood-plastic composite materials, and other fields. The wood powder processed by the Ultrafine Grinder can also be used to make wood plastic products, which are environmentally friendly and durable. In this process, the machine can also process some mixed materials such as Seasam and Peanut shells together with wood to improve resource utilization.

2. Biomass Energy Field

It processes straw, rice husk, wood chips, and other materials into raw materials for biomass fuel particles. Biomass fuel particles are a clean and environmentally friendly energy source, which can replace coal and other fossil fuels. The wood powder grinding machine used in this field is usually a large model such as 500KG Grinder, which has high output and efficiency, and is equipped with a dust collector grinder to ensure environmental protection production.

3. Agriculture and Breeding Industry

It crushes corn cobs, straw, soybean meal, shrimp shells, fish meal, and other materials into powder for making feed or organic fertilizer. For example, crushing corn and wheat into powder and mixing with wood powder can make high-nutrition feed for livestock and poultry. Some small models can also be used as a small grinder machine to process materials such as bean and seeds for family breeding.

4. Chinese Herbal Medicine and Food Industry

It crushes the roots, stems, leaves, flowers, and fruits of various plants, as well as dry ginger, jujube, chili, and other materials into powder for pharmaceutical or condiment production. In this field, the machine is usually made of stainless steel to ensure hygiene, and some models are also equipped with a cryogenic grinding machine function to retain the effective components of materials. It can also be used as a herb grinder, dry ginger grinding machine, and licorice grinding machine to process various Chinese herbal medicines.

5. Chemical and Other Industries

It is used to crush various non-metallic minerals and chemical raw materials such as graphite, mica, bentonite, plastic, rubber, and refined cotton. Some models can also be used as an airflow pulverizer and a Vacuum Mill to process chemical raw materials with high requirements for fineness and purity. In addition, it can also grind materials such as tobacco, salt, sugar, and coffee beans, and is widely used in the chemical and food processing industries.

Summary and Suggestions

The properties of the materials to be processed (such as hardness, fiber content, and humidity), the desired final product’s fineness and output, the equipment’s energy consumption, environmental protection, and durability must all be carefully taken into account when selecting a wood powder grinding machine. This is similar to selecting other grinding tools, such a cannabis grinder and a black pepper grinder, which must be matched based on real demands.

For small-batch production or home use, a small Electric Grinder or small Hammer Mill is a suitable choice, which is easy to operate and move, and does not require a complex charger. For large-scale industrial production, it is necessary to choose large models such as 200KG grinder and 500KG Grinder, which have high output and efficiency, and are equipped with a dust collector grinder and CE Certificate grinder qualification to ensure production safety and environmental protection.

To prolong the equipment’s service life and guarantee the stability of product quality, care should also be taken when operating the wood powder grinding machine, including proper operation technique, routine cleaning and maintenance, and prompt replacement of any susceptible parts. The key to increasing production efficiency and product quality is selecting the appropriate grinding equipment, whether processing wood or other products like food and pharmaceuticals.