And, that is, the production of feed grade calcium hydrogen phosphate. The method is characterized by easy process mastery and stable product quality. But the downside is that there is a large amount of fertilizer-grade calcium hydrogen phosphate valley called white fertilizer and phosphorus stone. At present, except for a few human-type enterprises that can produce compound fertilizers with fertilizer-grade calcium hydrogen phosphate, these two by-products are the burden of most enterprises, resulting in high raw material consumption and high cost. At present, many domestic enterprises require 1.3 tons of sulfuric acid per ton of feed-grade dicalcium phosphate, and the phosphorus oxide content of phosphate rock is not less than 332 tons.
The production of feed grade calcium hydrogen phosphate by hydrochloric acid method has developed rapidly in recent years. Now some companies that produce hydrochloric acid by the side have chosen this process, such as an enterprise with an annual output of 10,000 tons of sulfur-based compound fertilizer, and it is necessary to produce 20,000 tons of salt sputum by-product. The production of potassium sulfate by the Mannheim method also takes into account the outlet of hydrochloric acid, and the production of feed grade calcium hydrogen phosphate by the hydrochloric acid method can not only digest the large amount of hydrochloric acid which is not produced by-product. It eliminates the production and environmental impacts caused by the large amount of hydrochloric acid and jade, and can also produce feed additives that meet export standards. It can be said that there are many. Make the resources fully utilized. However, the calcium chloride mother liquor produced by the process in the production process will cause new pollution to the environment. In order to solve this drawback, domestic research institutes and production enterprises of colleges and universities have continuously researched and innovated the production process of feed grade calcium hydrogen phosphate. Among them, the patented de-fluorination technology of composite precipitation method invented by Hebei University of Science and Technology Industrial Development Corporation can increase the conversion rate of available phosphorus in wet-processed phosphoric acid to more than 8 and does not produce fertilizer grade calcium hydrogen phosphate. Compared with the method, the raw material cost can be reduced by about 20. At present, this technology has been applied in many enterprises, and the economic and social benefits are very obvious.
On this basis, Hebei University of Science and Technology has made unremitting production processes for the hydrochloric acid production process. The filtration process is saved, which greatly shortens the production cycle. In the neutral section. A special process was adopted to change the powdery product into a quick-flowing crystal. All the indicators of the products are excellent national standards, meet the export requirements, and ask about the calcium chloride mother liquor pollution. They invented a new process for the production of ammonium chloride by-product from the centrifugal mother liquor. In the process of neutralization, a new agent was used, and the calcium contained in the phosphate rock powder was used to produce qualified feed grade calcium hydrogen phosphate, which was eliminated. Calcium mother liquor on the environment.
Small manual plastic Steel Doors and windows are used for special-type equipment manual steel door and window welding processing machines for plastic steel doors and windows processing, and are officially put on the market.
Plastic steel is a new type of chemical building materials. It is followed by wooden windows. The first generation of greening and energy-saving products after steel windows and aluminum alloy windows have been listed as national key new products. The market has a claw capacity of hundreds of millions of square meters, and is being listed as a violation of the local, Chengmen window part of the mandatory promotion products, market development prospects broad. This food product developed by the factory directly processed 4 steel profiles into door and window products. The machine has all functions such as material cutting, positioning welding and clear angle forming, thanks to the large base and high positioning structure. It can better solve the differences in performance structure and specification rule of plastic steel profiles all over the country, and can process various types of plastic steel profiles.
The cutting saw can complete the blank cutting, cutting and other complex angle processing, the section is flat, the angle is accurate, and it is equipped with the type of brackets and automatic fixed capacity, which is beneficial to mass production. The welding method adopts advanced tack welding head, which can be welded at the same time by many people on the workbench. It can not only improve the processing efficiency, but also ensure the accuracy of the door and window frame structure. The profile pressing is realized by a simple and practical cam mechanism. The docking adopts the chute and the connecting rod gaining mechanism, and is suitable for mass production in the welding head. The overall structure of the box makes it easy to control the temperature of the heated soldering plate, make the welding firm, and is more conducive to mass production. The whole machine is compact in structure and small in area. It uses 220 volt power supply, 2 people, and 5 people produce more than 50 square meters per day.
The quality of door and window processing has reached the national building materials quality standard, and the cost of a complete set of equipment is less than 10,000 yuan, which can realize a profit of more than 200,000 yuan. It is an ideal processing machine for plastic steel doors and windows.
The freeze-dried varicella live vaccine developed by the Changchun Institute of Biological Products of the Ministry of Health of Shandong Province was awarded the national new drug by the freeze-dried varicella live vaccine of Laizhou Kanglai Health Products Co., Ltd. It has been identified that its quality has reached the requirements of the World Health Organization regulations. Chickenpox is an acute infectious disease that is highly contagious to children, mainly transmitted by airborne husbands and infected. The infection rate is 8,90. There are many complications due to chickenpox. The consequences are serious. It poses a great threat to the health of children. It has been proven at home and abroad. The most reliable and fundamental measure to control chickenpox is to vaccinate live attenuated vaccines. And the second injection of life immunization, the past. Used in the country.
The freeze-dried varicella live vaccine developed by Changchun Biological Products. In the south and north of the country, a total of Linqing observed, the health-susceptible children, the positive rate of serum antibody after injection reached 98.89 reached the world's advanced level, high; strong light cassia brick by the China Light Industry Association glass enamel research institute and Huzhou, Zhejiang Province The city's silicon brick factory jointly developed and issued high-strength ultra-light silicon bricks in Shanghai for technical appraisal. The brick adopts silica powder as the main raw shake, and is a mineralizer. It adopts self-hard casting molding technology. After the green body is dried, it is fired at 13800, 14, 0 and high temperature, and the macroscopic spherical small pore çžµ quartz crystal can be obtained. The high-strength ultra-light silice-insulated refractory village material with main phase porous structure has the advantages of low capacity, high heat insulation performance and high temperature resistance.
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