Bestact for Harbor Facilities, Iron Steel and Cement Making Plants ENVIRONMENTAL SYSTEM

Bestact allows for safe operation of Harbor fac Harbors of steel and electrical facilities are exposed to dust, dirt, corrosive gas while handling large quantities of industrial material such as iron ore and coal. Due to their large scale and high degree of automation, reliability, safety and durability and uptime are a must for any electrical component being used in these applications. From unloading raw materials at harbors to fabricating steel derived products, productivity is the key for these processes which are becoming more automated and operated automatically by computer systems. In contrast,...

Steel making process (Molten steel) Basic oxygen furnace Pig iron converted to molten steel (Molten iron) Blast furnace Raw materials are put into the top of blast furnace and pig iron (molten iron) comes out from the bottom. (Molten iron) (Scrap iron) Continuous casting Cooling down molten steel and cast slabs continuously. Torpedo car Transporting of molten steel by torpedo car Rolling process Cold strip mill P.9 Slab is milled with a rolling machine. Slab is rolled with a rolling machine. (Hot-rolled coil products) Continuous hot-dip P.9 galvanization (Cold-rolled steel)

Harbor facilities (Loader/Unloader) Application to detect position of a crab trolley (traversing direction). Ship loader Application to detect rotating position Harbor facilities incorporate raw material handling machinery such as unloaders and various cranes, reclaimers and stackers for transferring, stacking and discharging iron ore and coal, and belt conveyors arranged in between these machines. Due to their close proximity to coastal areas and their handling of large quantities of industrial materials such as iron ore and coal, the harbor facilities are exposed to an environment where dust,...

Harbor facilities (Belt conveyor) The Bestact PSKU-110R25CB is used for the reversing of conveyer belt operation and detecting belt derailment, where the dust condition is especially severe even among harbor facilities. Device used to reverse direction of a conveyer belt Unloader with a retractable crane Mantrolley type unloader Rope trolley type unloader Device used to detect belt derailment Portal bridge crane with a retractable crane Tower type jib crane Self-propelled low-floor jib crane Belt conveyor Harbor facility Heavy-duty limit switch PSKU-110R25CB Iron and steel making plant Power...

Dust generated from conveying coke and raw materials adheres to conventional switch devices and impairs their ability to operate reliably. Consequently, industrial engineers crave switches with longer life and without contact problems. Bestact built in limit and proximity switches can meet such demand due to the sealed contact that is used. Tramcar (Coke transportation) During raw material transportation, low-level signals are needed for detecting trolley position and for opening/closing status of a hopper gate. For detecting position of a trolley of stacker in an iron and steel making plant...

Iron making plant Bestact output contacts are used in the master controller in iron making plants. Slide movements of a cam operate conventional contacts. However, the cam often seizes and oxide coating forms on the surface of contacts due to the severe operational environments << Product Model >> Selector switch PLRC-G and thus causes switching problems of conventional contacts. A Bestact vane type magnetic proximity switch improves reliability of output contacts and mechanical durability of a main operational switch in iron making plants.

6 Hot strip mill Hot strip mill is one of the most common facilities in steel fabrication. Each slab is reheated to over 1000°C in a reheating furnace. It is then run into a hot strip mill set up as a continuous “strip” at speeds of more than 80 km/h where it is flat-rolled. In a highly automated facility, slabs are run into this mill on the order of every 30 to 45 seconds. The steel manufacturing industry is on a par with the textile industry in terms of its large consumption of water. Generally speaking, in the fabrication of steel, the blast furnace and hot strip mill will consume the most...

Cold strip mill Acid cleaning “ pickling” process An image of cold strip mill Cold strip mill Usage environment The frictional heat developed between the “work” rolls of cold strip mill and metal sheet increases the ambient temperature to near 100˚C. In addition to this, lubricant is applied to the sheet metal during this process and creates an environment with high temperature and humidity. Advantages of Bestact columnar type magnetic proximity switch Bestact columnar type magnetic proximity switches are used as sensors for detecting positions of work rolls*1 and winding length of the coil*2...

Auxiliary contact applications The advantages of conventional auxiliary contacts are electrically and mechanically durable, structurally simple and can be easily maintained. However, after the advent of PLCs, low level signaling (24 VDC, 10 mA) of contactor status became predominant and the use of conventional auxiliary contacts led to contact failure for such signals. Bestact auxiliary contacts are ideally suited for this type of application Auxiliary contacts for a circuit breaker due to their wiping action and immunity to the surrounding environment. They have improved reliability significantly....

High Reliability, Inherent in Stringent Quality Control Bestact products are manufactured in the most advanced facilities, utilizing the expertise we have gained from years of ongoing research and development as well as empirical field data under a stringent quality control system. As example of this would be our production equipment, which automatically adjusts the spring load to the optimum value, thereby maximizing contact life and reliability. Quality management on the Bestact production line Order processing, production management Parts procurement Mechanical processing Raw materials procurement...