Coal-based activated carbon is a high-tech, high-value-added deep processing coal product processed from coal. Shanxi Datong is a world-famous coal capital, and it has also created many coal chemical companies that use coal as raw materials. Coal-based activated carbon is one of them, and its activated carbon production accounts for half of the country’s total production. However, the reporter recently discovered in this interview that this important activated carbon production base has hidden a great crisis.
The crisis comes from the blossoming of activated carbon companies. Behind the red fire is a deadlock that hinders the development of activated carbon, such as large internal consumption, small scale, and small features. This time when handling the Songhua River water pollution crisis, due to the insufficient performance of domestic activated carbon products, it has to be urgently imported from abroad.
Internal friction is big. Because of the interest-driven, investors are eyeing the construction of activated carbon companies. According to incomplete statistics, there are more than 50 activated carbon companies of varying sizes in Datong City, most of which are newly built in the last year or two. Last year, the output of activated carbon in Datong City reached 150,000 tons, with an output value of more than 600 million yuan, and the output reached domestic production. 300,000 tons (export 220,000 tons, domestic consumption 80,000 tons) half. With such a large demand, no one wants to dig for this bucket of gold. The result of your struggle is to build factories indiscriminately. It is understood that there are few companies with an annual output of more than 10,000 tons in Datong, basically all small businesses. The normal price of activated carbon is about 4,000 yuan per ton, and some small businesses sell from 2000 to 3,000 yuan. Datong City's activated carbon company loses nearly 100 million yuan each year, which also causes the market price of Datong activated carbon to be chaotic. The cost of internal consumption has risen sharply, with few advantages.
Small scale. Datong City's activated carbon industry is really hot in recent years. There are 18 activated carbon companies in Zuoyun County of Datong City with a total output of 50,000 tons, accounting for one quarter of the total output of coal-based activated carbon of the country. The annual production value is nearly 100 million yuan. However, the newly-built activated carbon companies are mostly producing less than 0.5 million tons per year. Therefore, these enterprises cannot have high-quality talents, which ultimately leads to extensive management and poor competitiveness. It is understood that in Shanxi Province, Shanxi Province Xinhua Chemical Plant, which can lead the province's activated carbon companies, is the largest coal-based activated carbon production base in China with an annual output of more than 30,000 tons, and it is a successful bidder in the national supply of activated carbon for tap water. To reach 95%, only one water plant in Hangzhou will use 10,000 tons.
Features less. In the company of activated carbon in Datong City, most of the products are similar to each other. Just as the Han song sings 'You have everything I have'. This kind of stereotyped product status quo, once there is a merchant who want to compete for orders, resulting in the price in the auction fell and then fell, the profit space is getting smaller and smaller. The reporter learned from the interview that companies that have truly featured products, high-end products, and competitive products in the market account for only one-third of the total number of activated carbon manufacturers.
The principle of metal spinning process is to cover the processed metal blank (tube blank) on the mandrel, while the blank is pressed at the end of the mandrel by the tail, and rotates with the mandrel along the spindle, and the rotary wheel moves along the mandrel.
Generally speaking, light automatic spinning machines have structural advantages similar to ordinary lathes. However, in order to meet the requirements of the above spinning process, large spinning machines usually have the following 11 core advantages.
1. The automatic spinning machine bed, main shaft, and transmission system, rotating wheel frame, tailstock and other parts should have sufficient rigidity, and also have a heavier worktable, a thicker guide rail, and a thick wall bearing support And cabinets.
2. The horizontal and longitudinal feed mechanisms of the rotary frame are mostly driven by hydraulic transmission or a combination of mechanical and hydraulic pressure to generate sufficient spinning pressure and balance step-less speed regulation to meet process requirements.
3. Ordinary automatic spinning machines usually use one rotary wheel, but there are multiple auxiliary forming wheels (flanging wheel, curling wheel, etc.). The number of rotating wheels or rotating frame of the powerful automatic spinning machine is 2 to 3 (the general type is 2, and the cylindrical part spinning machine is mostly 2 to 3), and is symmetrical to the spindle axis. Balancing the radial force during spinning, reducing the bending deflection, deflection, and vibration of the spindle and core mold provides a prerequisite for improving the accuracy of spinning parts. This correspondingly requires the rotary wheel to have a higher horizontal (such as a special spinning machine for cylindrical parts) or a longitudinal (such as a general-purpose automatic spinning machine) synchronous feed accuracy. However, a rotary wheel is used for the light and powerful automatic spinning machine.
4. The main shaft has sufficient transmission torque and power. According to the specific process requirements, it can meet the constant torque or constant power adjustment. In addition, it is best to make the spindle speed and the longitudinal feed speed of the rotary wheel steplessly adjustable. On the one hand, it can meet the arbitrary selection requirements of the spinning process; on the other hand, it can maintain the surface rotation speed of the core mold during the spinning process. Possibility of constant feed per revolution.
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