According to foreign intelligence technology forecasting, weakly magnetic iron ore large-scale development, processing and utilization, it will be one of the major breakthrough in the 1980s to the end of the century in this industrial technology projects. In fact, the United States, the Soviet Union, Germany, Canada, Australia and other countries have stepped up their research on low-grade weak magnetic iron ore beneficiation since the 1950s. In the 1960s, there was a major refinement and flotation of hematite. progress, or put into operation during which the technological transformation of the representative processing plant are: Canada's Carol; US Pili Qi, Groveland, Republic (heating flotation); tin Hing South Africa and Liberia Bunge et al. In the 1970s, with the continuous rise of the world steel industry, the scale of iron ore dressing and ore dressing equipment was moving toward large-scale development. During this period, two remarkable mineral processing technologies were: selective flocculation-de-sludge-cation back-floating The application process and wet magnetic separator are used in the treatment of fine-grained low-grade weak magnetic iron ore. Its representative plants are Tilden in the United States, Septe Ellis in Canada, Lisakov in the Soviet Union, Samarkcu in Brazil, and Coy.
Since the 1970s, a large number of fruitful experimental research work has been carried out on the anti-flotation process of the Anshan-type lean hematite in China. Many processes have been tested by industrial-scale pilot plants.
(II) Application of weak magnetic iron ore reverse flotation process
When the type of iron minerals selected for ore is complex and variable, and the gangue mineral is a single quartz , it is obviously advantageous to use the reverse flotation process. However, for fine-grained iron ore (such as hematite treated by the Tierden plant in the United States, the inlaid grain size is 20-40 μm, and it needs to be ground to -25 μm 85% to achieve monomer separation), due to fine grinding. The large amount of slime produced has a great impact on reverse flotation. If the mud off pre-election mud off using conventional methods, will result in the loss of large amounts of metal, for research flocculation Fromer and other US Bureau of Mines Twin Cities Research Center, people - desliming - reverse flotation process. That is, the starch is selectively flocculated, and the difference in sedimentation speed between the iron mineral floc and the dispersed, unflocculated quartz and the low-grade slime is increased, and then a large amount of low-grade slime is removed by hydraulic dewatering to purify the slurry. It creates extremely favorable conditions for the reverse flotation operation in the next stage, thus improving the sorting effect.
China's Baotou Steel Concentrator and Hunan Jidong Iron Ore Concentrator have conducted selective process research on selective flocculation and desliming. In recent years, the use of strong magnetic desliming as a preparatory work for reverse flotation has been generally emphasized, and various combined processes such as weak magnetic-strong magnetic-reverse flotation or re-elasticity-weakening-strong magnetic-reverse flotation are formed. The advantages of using strong magnetism as a preparation for reverse flotation are mainly due to the fact that the strong magnetic separator can throw a large number of low-grade tailings and slime; the enrichment ratio is large, so that the amount of selected ore in the reverse flotation is greatly reduced, and the water for tailings treatment is reduced. Recycling and recycling bring convenience, and the discharge of mineral processing water is easy to treat. The disadvantage is that the capital investment is large. Whether it is flocculation or demagnetization or strong magnetic desilting, it is necessary to enter a strict technical and economic comparison.
For the Anshan-type lean hematite ore in Daqishan, the combined process of re-election and weak magnetic pre-stage grinding and pre-separation can also be used to separate the coarse-grained high-grade concentrate in advance, and then demineralize by strong magnetic separation. The ferromagnetic minerals and the strong magnetic concentrates enter the reverse flotation operation. In this way, a combined process of stage grinding, magnetic, heavy and reverse flotation is formed, and different beneficiation methods are mutually extended and complement each other to ensure product quality and metal recovery rate of the entire sorting operation.
In short, the cationic reverse flotation process using amines as collectors and corn starch as inhibitors, in the various joint processes for processing weak magnetic iron ore, will follow the development of China's agriculture, chemical and other related fields. Gradually expand the scale and scope of its application.
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Changchun FAW Sihuan Automobile Pipeline Co., Ltd
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Rooted in the northeast, it radiates across the country.Sihuan Pipeline Company, integrating R&D, design, production, experiment and testing, has been specialized in producing nylon gas transmission pipeline, fuel pipeline and high-pressure pipeline products for 20 years.At present, the enterprise has nearly 40000 square meters of modern production workshops and business office buildings, more than 200 senior employees, and an annual output of 56 million automobile
pipeline products.Its subsidiaries are located in Chengdu, Qingdao, Ma'anshan, Jinan, Foshan and other cities. Yuncheng Branch is under preparation to meet the needs of customers in different regions.
Innovative fusion, leading technology
<R&D>
Sihuan Pipeline Co., Ltd. takes technological innovation as its eternal pursuit, and has accumulated profound technical information through 20 years of scientific research, providing the most advanced technical support for each product project.The company has been recognized by the municipal technology center and participated in the revision of several national standards and industrial standards.The scientific research team has reached cooperation with Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun University of Technology and other scientific research institutes, jointly developed a number of provincial science and technology department projects, and achieved a number of technical achievements.The testing laboratory has passed the ISO17025 laboratory management system certification. It has more than 40 sets of tube performance testing equipment and raw material testing instruments, and the testing means are
internationally leading.
Lean production, better quality than gold
<Production>
Sihuan Pipeline Company, based on the industry trend, formulates equipment procurement plans every year and continues to introduce world-class production equipment. Now, it has several automatic extrusion production lines in Merafil, Switzerland, as well as international top equipment such as Clarke bellows molding machine in France, Opel shrink pipe machine in Italy, which are stable, efficient, highly accurate, meet the diversified needs of the main engine factory, and achieve the brand charm of Sihuan.
Scientific management, safeguard quality.The production department implements a quality control system higher than the national standard, adopts 6S management on the site, regularly carries out personnel training, and constantly improves the process procedures.The quality inspection department must inspect every product and every process, resolutely put an end to the delivery of substandard products, and strive to promote product quality to the highest standards in the industry.
Four ring quality, famous throughout the country
<Products>
The products produced by Sihuan Pipeline Company are related to brake systems (including vacuum brake pipes, air brake pipes, spiral pipes, rear axle brake pipes);Fuel system (cover to atmospheric ash filter pipe, fuel pipe, crankcase vent pipe, vacuum pipe);New energy thermal management system and industrial energy storage water inlet and return pipeline assembly integrate safety functions such as check valve, flow regulating valve and exhaust valve, which directly affect vehicle performance and are prerequisites for safe driving;SCR system (including electric heating urea pipe, cooling water pipe and gas pipeline);High pressure pipeline products are used in clutch power assist system and hydraulic lifting pipeline. Excellent performance, stable physical performance, excellent chemical resistance, good processing performance and long service life.All products have passed the CQC certification, and all parameters tested in the laboratory are far higher than the national standards and industry standards.
After 20 years of hard work, Sihuan Pipeline Company has won recognition from all walks of life. It has successively won honorary titles such as "Jilin Province Small Giant Enterprise in Science and Technology", "High tech Enterprise Certificate", Changchun "Specialized, Special and New" SMEs. Its products are
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In the future, Sihuan Pipeline Co., Ltd. will cater to the national carbon peak strategy, research and develop low emission pipeline manufacturing technology in a forward-looking manner, provide customers with high-quality products and services with innovation and quality, and create a better future for the automotive industry!
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