Baosteel Metallurgy

 Rubber and plastic is a general term for the rubber and plastic industries. They are all subsidiary products of petroleum. They are all the same in source. However, in the process of making products, their physical properties are different, and their uses are even more Different, rubber is widely used in tires, and plastics are becoming more and more widely used with the needs of technology and market, and they are inseparable from daily life. Simply put, the most essential difference between plastic and rubber is that plastic deformation occurs when plastic deforms, while rubber deforms elastically. In other words, plastic is not easy to return to its original state after deformation, while rubber is relatively much easier. The elasticity of plastic is very small, usually less than 100%, while that of rubber can reach 1000% or even more. After most of the plastic molding process is completed, the product process is completed; and after the rubber molding process is completed, the...

 Archaeological evidence suggests that humans arrived in Borneo at least 120,000 years ago, probably from China in maritime Asia, during a continental ice age when seas and islands were shorter (see History of Borneo and Papua New Guinea for distances ). 50,000 years ago, the ancestors of Australian aborigines and New Guinea traveled to both sides of Sahul in the Lombok Strait by boat. As early as 3000 BC, the early Egyptians knew how to assemble planks of wood into the hull of a ship. The early Egyptians also knew how to assemble treenails tied together with planks, using caulked seam spacing. "Khufu's Ship", a 43.6-meter vessel entering the foundation pit at the foot of the Sealed Pyramids of Giza in the Great Pyramid of Giza, 4th Dynasty, around 2500 BC, is a full-scale surviving example, probably Has fulfilled the function of symbolizing a solar barque. The early Egyptians also knew how to tie mortise and tenon joints together with the planks of their ships. The oldes...

Thermal power plants are mainly for heat supply, hot steam or hot water is the main product of thermal power plants, and electricity is a by-product. Ordinary fossil-fuel power station mainly generate electricity, supplemented by heat supply. This is the biggest difference between the two. The thermal power plant converts the chemical energy of the fuel into electrical energy and provides heat energy to the outside world, giving priority to ensuring heat supply, "heat determines electricity", that is, cogeneration of heat and power. The  fossil-fuel power station only converts the chemical energy of the fuel into electrical energy, and does not supply external heat A  fossil-fuel power station is a factory that uses coal, oil, and natural gas as fuel to produce electric energy. Its basic production process is: the fuel is burned in a boiler to heat water to make steam, and the chemical energy of the fuel is converted into heat. The steam pressure The steam turbine is driven t...

Guillotine type rubber cutting machine Drum type rubber cutting machine  1 Capacity comparison experiment 1.1 Test equipment: For the convenience of comparison, two rubber cutters with exactly the same shear force were used for comparison. That is, one 100KN guillotine type glue cutting machine and one 100KN drum type glue cutting machine; 1.2 Test raw material: styrene-butadiene rubber block (SBR1712), each block has a net weight of 35 kg; its cross-sectional size: 500×110, length is about 650; test raw material quantity: 10 packs; 1.3 Purpose of the test: Cut 10 packs of test materials along their section into rubber sheets with a thickness of about 20-40mm. Compare the time and productivity required for shearing with these two devices. 1.4 Test method: 1) Guillotine glue cutting machine: Put the test material flat on the roller on the surface of the workbench at a suitable position, start the hydraulic system, and the guillotine moves downward to cut off the test material from t...

 A thermal power plant refers to a thermal power plant that uses steam extraction or exhaust steam from a steam turbine to provide heat to users while generating electricity. The main working principle is to use the hot water after the thermal power plant generates electricity, and heat it after reheating. Since thermal power plants both generate electricity and heat, the boiler capacity is larger than that of thermal power plants of the same scale. Thermal power plants must have more boiler capacity than general thermal power plants for backup, and the water treatment capacity is also large. A thermal power plant must be close to the heat load center, and is often the center of a town in a densely populated area. Its water use, land acquisition, demolition, and environmental protection requirements are much higher than those of a thermal power plant with the same capacity. At the same time, a heat pipe network is also built. Thermal power plant operating characteristics The operat...