Laboratory Special Fine Powder Screening Equipment

Wednesday April-30 2025  17:13:45

Laboratory special fine powder screening equipment is mainly used for accurate particle size classification and analysis of powder samples, especially for ultrafine powders (such as nanomaterials, pharmaceutical powders, chemical raw materials, etc.). On the basis of the traditional test sieve, it can better solve the screening problems of fine powders, easy to agglomerate, static electricity and other materials by superimposing ultrasonic energy, improve screening efficiency and accuracy, and can adapt to the experimental needs of small batch samples.

Video of laboratory special fine powder screening equipment

What is the working principle of laboratory special fine powder screening equipment?

The ultrasonic test sieve consists of an ultrasonic generator and a transducer. The ultrasonic generator generates a high-frequency electrical signal, which is transmitted to the transducer installed on the sieve through a cable. The transducer converts electrical energy into high-frequency mechanical vibrations and transmits these vibrations to the sieve.

①Prevent mesh clogging: effectively disperse the fine powder attached to the sieve to make it easier to pass through the mesh.

②Improve screening accuracy: The surface of the screen forms a high-frequency micro-vibration (amplitude of about 1-10μm), which instantly breaks the agglomeration and electrostatic adsorption of the powder, so that particles with similar particle sizes can be better separated.

③Reduce the number of screening times: For materials that are difficult to screen, one ultrasonic screening may achieve the effect of multiple ordinary screenings.

What are the advantages of laboratory special fine powder screening equipment?

Solve the problem of fine powder adhesion: Fine powder usually has high adhesion and is easy to adhere to the surface of the screen, resulting in a decrease in screening efficiency. Reduce the adhesion of powder to the screen through mechanical vibration, and use ultrasonic vibration to keep the fine powder flowing on the surface of the screen to avoid adhesion.

Deal with the problem of particle shape and size distribution: The uneven particle shape and size distribution of fine powder may affect the screening effect. Laboratory fine powder screening equipment performs multi-stage screening by setting screens with different apertures to ensure more accurate particle separation.

Solve the problem of screening efficiency: Improving screening efficiency is the key goal of laboratory fine powder screening equipment. Laboratory special fine powder screening equipment usually adopts optimized screen design and selects appropriate materials and structures to improve permeability.

Handling agglomeration and clogging of fine powder: By applying high-frequency, low-amplitude ultrasonic vibrations on the screen, the attraction between powders is destroyed, so that they remain dispersed, effectively preventing agglomeration and mesh clogging. This continuous micro-vibration can also activate the powder on the screen surface, making it easier to pass through the mesh.

Recommended mesh size for laboratory special fine powder screening equipment

Industry field	Applied fine powder type	Recommended mesh size range	Corresponding particle size range (μm)
Pharmaceutical research and development	Medical micropowder, flow aid	100–400 mesh	150–38μm
New material development	Alumina powder, nanoceramics, carbon materials	200–635 mesh	75–20μm (even finer)
Fine chemicals/cosmetics	Talc, titanium dioxide, color powder	150–500 mesh	100–25μm
Food and nutrition	Fruit and vegetable powder, protein powder, plant powder	80–200 mesh	180–75μm
Environmental and geological analysis	Soil powder, mineral samples, dust particles	100–300 mesh	150–50μm

Application of laboratory special fine powder screening equipment

Laboratory special fine powder screening equipment is a high-precision separation tool developed for ultrafine powders (particle size is usually less than 100 microns). Its core value lies in achieving precise control of particle size distribution, avoiding agglomeration and ensuring sample purity.

Pharmaceutical industry: The particle size of fine powder is crucial to the solubility and bioavailability of drugs. Laboratory special fine powder screening equipment can be used to ensure the uniform particle size of drug raw materials and improve drug efficacy, such as lactose, starch, etc., to ensure the uniformity and quality of excipients.

Chemical industry: Fine powder screening in chemical products can affect reaction efficiency and product quality. The particle size of catalysts is strictly controlled to ensure the high efficiency of the reaction. It can also ensure the fineness of pigments and improve the color saturation and uniformity of coatings.

Food industry: Screening of fine powder helps to ensure the taste and quality of the product. Laboratory special fine powder screening equipment can ensure the uniformity of spices, enhance flavor, remove impurities, improve the fineness of flour, and ensure baking effect.

Materials Science: In the research and development of new materials, the characteristics of fine powders directly affect the performance of materials. The particle size distribution of nanopowders is controlled to optimize the performance of materials, ensure the uniformity of each component, and improve the strength and toughness of materials.

Laboratory special fine powder screening equipment plays an important role in many industries. Through screening technology, it ensures the quality and consistency of materials and promotes the research and development and production of various products. With the continuous improvement of the performance requirements of fine powder materials, the application prospects of laboratory special fine powder screening equipment will be broader.