Liaoning Province was once the center of China's machine tool industry. Shenyang Machine Tool Plant and Dalian Machine Tool Plant were the top leaders in the machine tool industry of the mechanical industry system. Who worked in the mechanical manufacturing factory in those days who did not drive the machine tools they produced? Or who doesn't know Shenyang Machine Tool Plant and Dalian Machine Tool Plant? Many machine tool factories across the country have their output technicians.
However, when the state implemented the policy of revitalizing the old industrial bases in Northeast China in 2003, the two companies were already dying. With the Dongfeng remodeling in Tiexi District of Shenyang, Shenyang Machine Tool Plant moved into the new area as a whole, and the factory appearance was one of the new. Many old leaders of the mechanical industry system were full of praise after the visit, and the financial status of the company also improved. Dalian Machine Tool Plant is unique in the field of combined machine tools, and the combined machine tools of most industrial enterprises in the country are produced in this enterprise. But in the late 1990s, business operations became more and more difficult. After 2000, the company had to carry out reforms. In fact, it has become a state-owned enterprise with a backbone of enterprises, and the company has also shown its vitality.
Dalian Guangyang Machine Tool Factory is a purely private enterprise. When the revitalization of the old industrial base in Northeast China, the private enterprise was founded less than 10 years ago. It is small in size and unknown. It has also been disdained by other old machine tool factories. At that time, CNC machine tools were a weak link in China. I once combined these machine tool factories to jointly develop and produce machine tool numerical control systems, but they could not unite in politics. At that time, Dalian Guangyang Machine Tool Plant put forward the concept of bus control. I think this concept is worthy of study. A seminar for machine tool system enterprises and colleges was held in Beijing, let Dalian Guangyang participate in the joint research of CNC system, and blended with Huazhong of Huazhong Institute of Technology. CNC and Dalian Machine Tool Plant cooperate. But some people, including the machine tool association, don't see Dalian Guangyang, and they still sneak in privately.
Now more than ten years have passed. In the previous paragraph, the Dalian Machine Tool Plant was on the verge of bankruptcy and the leader fled. The Shenyang Machine Tool Plant was quite a while, and it was also a propaganda of the return of light. At that time, some people said that they did not believe, and now they have to take the road of restructuring. The official news came two days ago. The two state-owned enterprises were reorganized by the Central Enterprise General Technology Group, and their assets have shrunk by at least 80%. At that time, the unknown Guangyang machine tool was now in full swing. The Minister of Industry and Information Technology, Miao Wei and Vice Minister Xin Guobin, all went to their on-site meeting because Dalian Guangyang produced a five-axis CNC machine tool for China's flight missile engine. Production line. The CNC system is all produced by the company itself. At the same time, in order to avoid the core chip like ZTE being controlled by others, the CPU of the CNC system uses domestic chips.
On the occasion of the Shenyang Machine Tool Plant and the Dalian Machine Tool Plant, the small Dalian Guangyang machine tool has sprung up in the past, building the largest constant temperature and humidity underground powerhouse in the country, with an area of ​​30 football fields. The company has sufficient orders, and mainly the high-end machine tools of the five-axis CNC machine tools, key components such as CNC systems and sensors are produced by the company itself. Now Dalian Guangyang has become a representative high-tech star enterprise in Liaoning Province and Dalian City. For more than a decade, there has been no change in the vicissitudes of life, but it is called "30 years of Hedong, 30 years of Hexi" is just right.
A leader of Liaoning Province and Dalian City said: "These companies, I am watching and walking on different roads." Chairman of the original machine tool industry association commented: "The history of Shen and Daji is really worthy of profound Rethinking, if the machine tool industry and Liaoning Province cannot seriously sum up the lessons learned according to this, China's machine tools may still have to be for 20 years!†An old factory manager in the industry commented: “Dalian Guangyang will be better and develop faster because of Japan’s Five-axis CNC machine tools are no longer available to Chinese military-related enterprises, including Weichai, Fast, and Hande axles for the production of civilian products. As long as the quality of Guangyang machine tools is reasonable and the price is reasonable, then the development space of Guangyang is very good. Big, it is entirely possible to be the first in the world."
I will not dare to say whether it will be the world's number one, but only the domestic market has a bright future. What is the problem in this case? I can't tell. But at least Dalian Guangyang is ahead of the research and development of high-end CNC machine tools. The other reason can only be that the insider knows the benevolent, and the wise sees the wisdom.
Natural Graphite , as its name implies, is naturally formed by natural Graphite , which is generally found in graphite schist, graphite-gneiss, graphite-bearing schist and metamorphic shale.
Features
The chemical composition of graphite is carbon (C). Naturally produced graphite is rarely pure and often contains impurities, including SiO2, Al2O3, MgO, CaO, P2O5, CuO, V2O5, H2O, S, FeO and H, N, CO2, CH4, NH3, etc. Natural graphite minerals are black, steel gray, striated black; Metallic luster, crypto, dull, opaque; The hardness is isotropic, the vertical cleavage surface is 3 ~ 5, the parallel cleavage surface is 1 ~ 2; Qualitative soft, density is 2.09 ~ 2.23 g/cm3, have the feeling of greasy, easy to contaminate finger. Mineral chip under the transmitted light is generally not transparent, extremely thin can pervious to light, the light green gray, refractive index of 1.93 ~ 2.07, under the reflected light is light gray, reflective pleochroism, Ro gray with brown, Re dark blue gray, reflectivity Ro23 (red), Re5.5 (red), the reflected color, double reflection were significantly, strong heterogeneity, polarization color for straw yellow.
Graphite is a complex six-party double cone, assumes the six-party tabular crystal, common simplex are parallel double, six-party double cone, hexagonal prism, but in good condition with rare crystal forms, the generally show scaly or platy, aggregate density lump, earthy or globular.
Type
The process performance and usage of graphite is mainly depends on the degree of crystallization, in accordance with its natural Graphite Crystal morphology can be divided into crystalline graphite, Flake Graphite ) and aphanitic graphite (earthy graphite) two types of industry.
Crystalline graphite
In the crystalline (scale) graphite ore, the diameter of graphite crystals is greater than 1 mu m. Ore grade is low, but optional; The mineral associated with graphite is usually mica, feldspar, quartz, diopathic stone, diabase, garnet and a small amount of pyrite, calcite, etc., some of which have some useful components, such as rutile and vanadium. The ore is scales, grainy scales or granulocyte structures, flaky, flaky, or blocky structures.
Crystalline (scale) graphite is divided into High Purity Graphite, High Carbon Graphite, Medium Carbon Graphite and low Carbon Graphite according to the fixed carbon content.
The high purity graphite (fixed carbon content is greater than or equal to 99.9%) is mainly used for flexible graphite sealing material, nuclear graphite, instead of platinum crucible for chemical reagent melting and lubricant base material, etc.
High carbon graphite (fixed carbon content 94.0% ~ 99.9%) is mainly used for refractory materials, lubricant substrate, brush raw materials, carbon products, battery raw materials, pencil materials, filling materials and coatings, etc.
Carbon graphite (80% ~ 94% fixed carbon content) is mainly used for crucible, refractories, casting materials, foundry coatings, pencil raw materials, battery materials and dyes, etc.
Low carbon graphite (fixed carbon content 50.0% ~ 80.0%) is mainly used for foundry coatings.
Cryptocrystalline graphite
Cryptocrystalline graphite is also called soil graphite or amorphous graphite. In cryptocrystalline graphite ore, graphite crystals are less than 1 mu m in diameter, which are microcrystalline and can only be seen in the electron microscope. High grade of ore, but poor selectable; The mineral associated with graphite is often quartz and calcite; The ore is microscaly - cryptocrystalline structure, block or soil structure.
Cryptocrystalline graphite ore is mainly distributed in contact metamorphic deposits. Actually the diameter graphite flake graphite ore is uneven, the so-called crystalline graphite ore, may also contain the aphanitic graphite, are too many content is often referred to as the mixed type graphite ore, may also contain a small amount of aphanitic graphite quality mineral crystalline flake graphite piece diameter slightly larger than 1 microns.
Cryptocrystalline graphite ore is mainly used in pencil, battery, electrode, graphite emulsion, graphite bearing ingredients and the raw materials of battery carbon rod. The non-ferrous graphite is mainly used for casting materials, refractory materials, dyes and electrode paste.
Natural Graphite
Natural Graphite,Expanded Graphite,Colloidal Graphite,Special Graphite
Fengcheng Ruixing Carbon Products Co., Ltd , https://www.lnfcrxts.com