Lignin fiber
Article author：admin. time：2016-10-18 05-43-09
Abstract: fiber lignin fiber is a natural wood fiber obtained by organic chemical treatment, the appearance of cotton wool or granular, white or grey white. Through screening, separation, heat treatment, chemical treatment, neutralization, bleaching and sieved into different length and thickness of the fiber to be applied to different materials. Due to high temperature above 250 degrees under normal conditions are very stable chemical substances, not as a sort of solvent, acid and alkali corrosion with excellent quality, non-toxic, tasteless, no pollution, no radiation, no influence on the environment, harmless to the human body, which is green environmental protection products, this is the other mineral fibres do not have. Fiber microstructure is band bending, uneven, porous, the intersection is flat, has good toughness, dispersion and chemical stability, water absorption ability, have very good thickening and anti cracking performance.
Lignin fiber performance parameters: oil absorption rate: not less than 5 times the quality of the fiber itself, moisture content: <5% heat resistant capacity: 230 C (short time of up to 280 C)
Main function: lignin fiber is widely used in asphalt pavement, concrete, mortar, gypsum products, wood pulp sponge and other fields, to prevent coating cracking, improve water retention and improve the stability of production and construction, increase strength, enhance the propriety of has a good effect on surface adhesion. Its main function is: thixotropic, protection, absorption, carrier and filler. In the pavement, the fiber stabilizer adopts the lignin fiber, the factory form cotton wool fiber or granular fiber.
Lignin fiber use: recommended dosage: usually 0.3% of the quality of the mixture, the specific implementation of the design.
Construction craft: clearance mixer used artificial feeding, put together when feeding the fiber bag in hot aggregate feeding, artificial fiber to mix tank delivery package, about 60 ~ 70 s will put a very high frequency operation, the workers must concentrate, so the spirit is nervous. Artificial fiber as a result of the action on, requires a response time, often can not mix tank a door in the fiber input mixing cylinder, resulting in a reduction of effective time and fiber aggregate dry mix, uneven distribution and influence of fiber fiber asphalt absorption effect, will make the spot appear on the road. Continuous mixing machine using fiber feeding machine. The feeding machine consists of feeding screw conveyor, screw conveyor, a fluffy and two fluffy, metering device, discharge screw conveyor, and a compressed air blower, two control valves and pneumatic devices and other components (see Figure 1). The whole machine is arranged on a base plate, and the outlet of the feeding machine and the mixing machine of the mixing machine are connected with the feeding port of the mixing machine and the mixing cylinder air supply pipe. The characteristics of feeding machine for flocculent lignin fibers, using volumetric measurement method. Production will be bagged compressed fiber or bulk fibers are poured into the hopper, the material of Doumen after the closure of the production process by computer control, feeding screw conveyor hopper in fiber transmission to the silo a fluffy, then through the screen to the lower part of the stock bin, the controller accepts to feed signal from the mixer after discharging screw the density of the conveyor immediately uniform lignin fiber floc calibration speed into the two level fluffy, further refinement. After the two stage air blower is blown to the mixing cylinder, the mixing of the lignin fiber and the aggregate is realized. In the bunker has always maintained a certain amount of fiber in a fluffy state, promptly added to the measurement system. So the automatic cycle, to achieve the coordination of the work with the mixing machine.
