Material Handling, Packaging & Transportation
The Baosteel bulk material stockyard is one of the largest comprehensive bulk material stockyards with the highest modernization level in the world at present. Before the overhaul modification, all the material stockyards, which have 31 bays in total, were open, which caused serious environmental pollution and material loss. In order to implement a green, intelligent and efficient new bulk material stockyard, relying on CISDI-ECIA environmental protection bulk material storage technology, Baosteel has carried out an on-line non-stop environmental protection modification to its bulk material stockyard from 2011 to 2019 under the principle of “one-step planning, step-by-step implementation.” After the completion of the modification, the Baosteel bulk material stockyard has become a super-large, complex, high-efficiency and environment-friendly bulk material yard with ECIA-B+C+E type, realizing the design goal of “mine into shed, coal into bin, materials transportation without being seen,” bringing huge social and economic benefits to Baosteel.
This paper will provide details of how safety incidents were significantly reduced in material handling operations and productivity was increased by 20% when deploying visual aid technologies. The paper provides an overview of the issues encountered prior to the visual aid technology being deployed and the results of the implementation. It provides specific implementation techniques, including recommended strategies for deploying visual aid technologies.
Zinc coverings possess specific properties. The received zinc layer consists of two zones: zones of zinc layers (chemical compounds of zinc and iron) and a transitive zone (a firm solution of zinc in iron). In many cases, the most widespread solution to the given problem appears to be a strong constructional material resistant to temperature, deterioration and corrosion on working surfaces. For car parts working in conditions of wear, sign-variable loadings, heat, speed and pressure, and also aggressive corrosion environments, the properties of a superficial layer have great value. Zinc plating to steel in self-propagating high-temperature synthesis (SHS) conditions promotes reception on its surface of high-quality diffusion coverings. Hardening of the superficial layers of carbonaceous steels via SHS method allows for the biphasic zinc coverings alloyed by chrome and aluminum, with corrosion stability of 45–55% and above.
This work considers the preparation of a zinc coating doped with aluminum under conditions of self-propagating high-temperature synthesis (SHS) for automobile parts. In order to increase the corrosion resistance of sheet steel used in the automotive industry, zinc coatings were doped with aluminum at temperatures of 550–650°C. When galvanizing under SHS conditions, d1, G phase, Fe2Al5 and FeAl3 are formed. An analysis of the microstructures showed that the zinc coating forms uniformly. With increasing strip thickness and temperature, the amount of aluminum in the layer increases. Coating adhesion also increases. Galvanizing a steel strip under SHS conditions helps to obtain a high-quality diffusion coating on its surface. Hardening of the surface layers of carbon steels allows one- and two-phase zinc coatings alloyed with aluminum with a corrosion resistance of 37–53% to be obtained more than after galvanizing by the galvanic method.
To protect parts and structures operating in corrosive environments, zinc coatings obtained under self-propagating high-temperature synthesis (SHS) conditions are widely used. However, an objective assessment of the quality of zinc coatings is difficult. In this paper, a new method for controlling zinc coatings is proposed — an effective benchmark (ECP-Zn) that takes into account operational properties, microstructure, phase composition and the thickness of a zinc coating. ECP-Zn was determined for zinc coatings obtained under SHS conditions, which was compared with hot-dip galvanizing, electroplating and thermal diffusion zinc coatings. Zinc coatings including a G phase with a continuous cubic lattice, a d phase (FeZn7) with a hexagonal lattice, zinc oxides, and also a x phase (FeZn13) were compared.