A shot blasting machine for steel plates is a multi-functional steel preprocessing line for cleaning welded structural components, H-beams, shaped steel, trusses, and steel plates. The blast nozzles are arranged in multiple angles and utilize the world's most advanced unit disc blade high-efficiency shot blasting nozzles, projecting high-speed and dense bead clusters that strike various parts of the original steel, providing a three-dimensional cleaning process. This rapidly removes rust layers, slag, scale, and other impurities from the steel surfaces, resulting in a smooth, roughened finish. It enhances the adhesion of the paint film to the steel surface and improves the steel's fatigue and corrosion resistance, thus improving the inherent quality of the steel and extending its service life.

Structure

The main functional components of this machine include the cleaning chamber, the indoor conveying roller tracks with the incoming and outgoing material roller tracks, the shot blasting unit, the shot recycling system (comprising a hoist, separator, longitudinal and transverse spiral conveyors, the shot recovery mechanism, and the supply pipeline), the blow-off mechanism, dust removal, and electrical control components.

2. Operating Principle

This high-functioning shot blasting cleaning equipment is designed for continuous feeding on roller conveyors. During the cleaning process, the steel structures or steel are transported into the blasting chamber by a variable-speed roller conveyor controlled by electrical systems. As they pass through, all surfaces are struck and abraded by a dense stream of shots from various directional coordinates, causing the oxidation, rust, and dirt to rapidly detach. The steel surface is then left smooth with a certain degree of roughness. The loading and unloading of workpieces occur on the roller conveyors at the in and out points of the cleaning room. The shots and rust dust that fall onto the steel are swept away by a blowing device, and the scattered shot dust is transported to the hopper of the chamber and collected by the longitudinal and transverse conveyors, then lifted to the separator at the top of the machine. The clean shots, after separation, fall into the separator hopper for reuse in the blasting cycle. Dust generated during the shot blasting process is transported to the dust collection system via exhaust pipes, where it is purified and the clean air is released into the atmosphere, while the particulate dust is captured and collected.

Section 3: Overview

Steel pretreatment equipment is used for the pretreatment of various plates and profiles, enhancing the quality and added value of steel production. In the construction of ships, drilling platforms, and other marine engineering projects, there is a high requirement for steel dimensions, posing significant challenges to various surface treatment processes. This is because a large number of steel plates and special profiles need to be efficiently cleaned, cut, welded, and painted before assembly. Surface treatment, as a process, is completed on the pretreatment line, which integrates processes such as shot blasting, applying primer, and drying. After this process, plates and profiles are thoroughly cleaned by shot blasting, and a temporary anticorrosion coating can be applied. Naturally, in addition to external conveying equipment, the pretreatment line includes a preheating furnace, a continuous through-type shot blasting machine, a paint booth, and a mobile hearth with drying channels. In terms of feeding and discharging areas for steel, the equipment provides a crossover conveying system, allowing for continuous loading and unloading of materials and effectively preventing collision damage.