Electric arc furnace (metallurgical steelmaking, mineral thermal smelting)

Principle: A high-temperature arc is generated between the graphite electrode and the furnace charge, with a temperature of over 3000 ℃. Three phase steelmaking electric arc furnace: scrap steel smelting, special steel smelting, tonnage ranging from 1 ton to 100 tons Vacuum consumable arc furnace: rare metals such as titanium, zirconium, tungsten and molybdenum, high-purity alloys Mineral arc furnace (resistance electric arc furnace): reduction smelting of ferrosilicon, calcium carbide, and non-ferrous metal ores Features: Ultra high power, high melting efficiency, core equipment for heavy industry smelting.

15 July-2026

Composition of complete set of electric furnace equipment (complete configuration)

Furnace body host: furnace shell, refractory insulation lining, heating element, furnace door, trolley/lifting mechanism, water cooling system Power supply and transformation system: electric furnace transformer, intermediate frequency power supply, rectifier, compensation capacitor Temperature control system: temperature control instruments PLC、 Thermocouples, human-machine interface, over temperature protection Supporting facilities Atmosphere system: nitrogen, hydrogen, ammonia protection gas path Vacuum unit: vacuum pump, vacuum valve (dedicated for vacuum furnaces) Cooling system: circulating water cooler, water-cooled cable Mechanical auxiliary equipment: feeding and unloading trolley, push plate, quenching oil tank/water tank

15 July-2026

General Basic Maintenance of Rock Wool Production Line Equipment

Safety & Electrical System Check that emergency stops, protective guards, safety interlocks and photoelectric limit switches are intact; blow clean the heat dissipation filter screens of control cabinets to remove accumulated wool and dust; ensure cables and wiring terminals have no overheating or damaged insulation; pressure gauges and temperature control instruments shall display normal readings, and alarm functions shall pass effective testing. Lubrication System Verify the oil levels of gearboxes and reducers stay within marked ranges, with no emulsification, blackening or deterioration; clear dust from all grease nipples and inject lubricating grease; replenish high-temperature grease for chains, guide rails and universal drive shafts; high-temperature resistant lithium grease shall be used in high-temperature zones. Cooling / Hydraulic / Pneumatic Systems Ensure cooling water pressure and return water flow meet standards with no pipeline leakage; keep the oil level and oil temperature of the hydraulic station normal and filters unclogged; maintain stable air compressor pressure, drain water from water separators, and ensure no air leakage of pneumatic valves. Transmission & Cleaning Adjust belts and chains to proper tension, free from cracks and missing teeth; clear accumulated wool, mineral slag and dust on equipment surfaces and gaps of roller tables; eliminate risks of blockage caused by solidified melt lumps around furnace mouths and centrifuges.

02 July-2026

Daily Maintenance of Rock Wool Production Line Equipment

The rock wool production line covers all process sections including cupola furnace, centrifuge, cotton collector, glue application system, pendulum cotton laying machine, pre-press, curing oven, longitudinal and transverse cutting units, conveyor rollers, dust removal system, as well as electrical control and hydraulic systems. Characterized by heavy dust, high temperature, high speed and heavy load conditions, its maintenance consists of three levels of daily operations: pre-shift inspection, in-shift patrol check and post-shift maintenance. Weekly and monthly regular maintenance are also required. All maintenance work shall be carried out with power cut off and warning tags hung; high-temperature equipment must be cooled down before overhaul.

02 July-2026

What equipment is included in the rock wool production line

1. Raw material processing and feeding system Responsible for the measurement, proportioning, and transportation of raw materials. The core equipment includes automatic batching machines, control cabinets, and feeding machines. Modern production lines use electronic metering for fully automatic feeding, which can accurately control the proportion of raw materials and ensure product stability. 2. Melting system Melting raw materials such as basalt and dolomite into lava at high temperatures, the core equipment includes a blast furnace/electric furnace, furnace frame, melting furnace level control system, dust collector, and exhaust gas treatment device. The current industry upgrade direction is to replace traditional blast furnaces with electric furnaces, which can reduce energy consumption and pollutant emissions. 3. Fiber making system Processing high-temperature lava into inorganic rock wool fibers is the core process that determines the quality of rock wool. The core equipment includes high-speed centrifuges (mainly four roll centrifuges, with fiber forming accuracy up to ± 0.5mm), fans, blowing air boxes, and slag removal machines. The uniformity of fibers formed by centrifugation directly affects the insulation performance of the finished product. 4. Glue application system Spraying binders and water enhancers in the fibers gives rock wool strength and waterproofness. The core equipment includes metering pumps, spray heads, and control cabinets. Some high-end production lines are equipped with laser lava tracking systems, which can accurately control the amount of glue applied. 5. Cotton collection and fabric cotton system The core equipment for collecting and shaping fibers and adjusting density includes drum cotton collectors, pendulum cotton looms, cotton induced draft fans, and cotton dust collectors. The pendulum cotton loom can achieve three-dimensional cotton distribution with a uniformity greater than 95%, ensuring consistent density of the finished product. 6. Molding and curing system The core equipment for curing the adhesive to achieve the specified strength and hardness of the rock wool includes a pendulum cotton machine, a forming machine, a folding pre press machine, and a curing furnace. The temperature control accuracy can reach ± 2 ℃, which is crucial for the performance of the final product. 7. Cutting and shaping system Cutting the solidified rock wool into standard specifications, the core equipment includes a longitudinal cutting machine, a transverse cutting machine (cross cutting machine), a cooling conveyor, a trimming machine, and a dust removal system. Some high-end equipment is equipped with high-precision length measuring devices and patented vacuum suction structures, with high cutting accuracy and minimal dust leakage. 8. Auxiliary supporting system The fully automated production line includes a waste edge recycling system (crusher, scrap edge recycling fan, which can recycle the produced scraps and reduce raw material loss), a solidification furnace hot air system, an explosion-proof system (natural gas detection, explosion-proof fan), a packaging palletizing system (automatic palletizing machine, packaging machine), a central control system, and a PLC central control system to achieve full automation operation.

26 May-2026