Sawdust Briquette Machine

A sawdust briquette machine is a screw-type extrusion press used to produce briquettes as fuel from biomass materials. It is one of the primary machines used in producing bio-charcoal briquettes. It is also called a biomass briquette press or wood charcoal machine.

The sawdust briquette machine mainly consists of a motor, an electrical control box, pulleys, a high-pressure compression section, a high-temperature forming section, a feed hopper, and a base.

The core principle is to utilize the plasticizing properties of lignin at high temperatures to bind cellulose together and form a briquette. Sawdust mainly contains cellulose and lignin. The screw proeller and heating coil of the sawdust briquetting machine create high-temperature, high-pressure conditions during working. The lignin softens under heat and acts as a binder, tightly binding the loose sawdust together. The sawdust, propelled by the high pressure of the high-speed rotating propeller, passes through the mold, ultimately forming dense, rod-shaped briquettes.

Based on the above principle of sawdust briquetting, we should easily understand that only raw materials rich in lignin and cellulose can be processed into briquettes by a screw-type briquette machine. Common biomass materials for producing briquettes include sawdust, wood shavings, rice husks, branches, and nut shells.

The size and moisture of materials are important for making high-quality wood briquettes. Regarding the size of the material, it needs to be less than 5mm, and the moisture content should be less than 12%. To make the materials meet these requirements, you can choose a wood crusher and sawdust dryer to process the raw materials.

First, set the temperature of the sawdust briquette machine to 280℃. After the temperature rises to 280℃, begin to feed materials into the sawdust briquette machine. Sawdust is pushed by the rotating screw forward to the end of the mold. Under high temperatures and high pressure, sawdust forms into briquettes and is expelled from the mold. The briquette producer needs to adjust the temperature according to the quality of the briquettes to get the ideal wood briquettes.

For more details, you can refer to the operation manual below for the sawdust briquette machine.

The mold determines the shape and size of sawdust briquettes. Common shapes of sawdust briquettes include square and hexagonal. The common diameter of the sawdust briquettes is 50mm and 70mm. If you want to carbonize the sawdust briquettes into charcoal, the mold with a 50mm diameter is the best. All the briquettes produced by the sawdust briquette machine have a hole in the core, which enhances the combustion efficiency.

1. Wood sawdust briquettes can be used as fuel for burning directly. Compared with natural wood, it has a higher density and heating value.
2. The sawdust briquette machine can use residual wood and agro-waste to produce briquettes, and these wood briquettes can be carbonized into charcoal. It changes the traditional way of making charcoal from lump wood, helping reduce tree felling.
3. Compared with natural timber charcoal, sawdust briquette charcoal has a higher heating value and longer burning time.

For customers in areas without electricity, we have developed a diesel-powered sawdust briquette machine.

Driven by the pulley, the spiral propelling shaft continuously transports the material to the front outlet, and gradually increases the pressure on the material to extrude the material into shaped briquettes. Therefore, the front section of the propeller has the greatest friction with the material and is also the most susceptible to wear. Our screw propeller shaft is made of Cr40 steel, which has a good balance between the toughness and wear resistance of the propeller shaft. The front section of the spiral is overlayed with tungsten carbide electrodes to further increase wear resistance.

As mentioned earlier, sawdust is rich in lignin. Lignin is sticky under high-temperature conditions and helps to shape the sawdust. The heating temperature setting varies according to the material. If the raw material is wood sawdust, the temperature is generally set to 280° first and then adjusted to the optimal temperature according to the quality of the sawdust briquettes.

Molding sleeves are available in two shapes, square and hexagonal. The most popular size now is 5cm in diameter. After conducting a large number of tests and production practices, it has been proven that sawdust briquettes produced using 5cm molding sleeves have the highest quality.