Wear-resistant Ceramic Screw Propeller for Screw Conveyor

Screw conveyors, paramount tools for material transportation, hold a wealth of versatility! Stepping into the realm of wear-resistant ceramic screw propellers unveils their profound essence.

I. Structure and Characteristics of Screw Conveyor:A screw conveyor is a machine that uses an electric motor to drive a rotating screw, pushing materials to achieve the purpose of conveying. It can operate horizontally, at an incline, or vertically. Its features include a simple structure, small cross-sectional area, good sealing, easy operation, easy maintenance, and suitability for enclosed transport. The key component is the screw propeller, and in this case, it is equipped with a wear-resistant ceramic layer, forming a wear-resistant ceramic screw propeller.

II. Working Principle of Screw Conveyor:As the screw shaft rotates, materials are pushed forward by the gravitational force and friction between the material and the trough wall. The screw blades rotate axially, propelling the material along the tangent line of the blades.

III. Applications of Screw Conveyor:Widely used in various industries such as lithium batteries, environmental protection, food, electronics, steel, waste incineration, chemicals, casting, and mining. It is suitable for conveying various powdered, granular, and small-sized materials, including grains, cement, clay, sand, salt, alkali, fertilizers, coal, coke, and bulk ores. However, it is not suitable for transporting perishable, highly viscous, large-sized, or easily agglomerating materials. Besides bulk materials, it can also transport various assembled items and perform mixing, stirring, cooling, and other operations during transport.

IV. Classification of Screw Conveyor:It can be categorized into shafted and shaftless screw conveyors based on form and U-type and tubular types based on appearance. Shafted conveyors are suitable for non-viscous dry powders and small granular materials, while shaftless conveyors are suitable for viscous and easily entangled materials. The performance and characteristics vary, and the efficiency of the conveyor is directly related to the performance of the screw propeller.

V. Classification of Screw Propeller:Screw propellers are classified into left-handed and right-handed rotations based on the direction of rotation and solid, belt-type, and blade-type based on shape. Solid screw propellers (S method) are suitable for powders and granular materials, belt-type (D method) for powders and small chunks, and blade-type for high viscosity and compressible materials, serving the dual purpose of conveying and mixing.

VI. Working Characteristics and Challenges of Screw Propeller:Direct contact with materials causes severe abrasive wear on the propeller. Prolonged operation leads to wear and damage. Metal propellers, after wear, result in rough surfaces, increasing friction, which can lead to material blockages and reduced efficiency or even machine downtime for maintenance. Addressing the wear problem of the propeller has been a focus of attention, leading to the development of wear-resistant ceramic screw propellers.

VII. Structure and Characteristics of Wear-Resistant Ceramic Screw Propeller:A wear-resistant ceramic anti-wear layer is installed on the surface of the screw propeller, providing characteristics such as wear resistance, long life, maintaining material purity, preventing blockages, etc. The wear-resistant ceramics used, mainly composed of alumina, form a tough ceramic known as corundum ceramic, characterized by high hardness and strong wear resistance. Practical tests have shown a lifespan of over 5 years. Ceramic anti-wear can effectively reduce abrasion debris, maintain material purity, and, in special industries such as lithium batteries, isolate metals to prevent contamination. Wear-resistant ceramics also have self-lubricating properties, with the surface becoming smoother with wear, effectively preventing material blockages. Highly praised, it has become a stable and high-quality product in the market.