NEWS
NEWS
NEWS

The use of nitrogen in various industries

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2018-11-05 19:21
  • Views:35

The use of nitrogen in various industries

(Summary description)  Used for annealing shielding gas, sintering shielding gas, nitriding treatment, furnace cleaning and purging gas, etc. It is widely used in metal heat treatment, powder metallurgy, magnetic materials, copper processing, metal wire mesh, galvanized wire, semiconductor, powder reduction and other fields. Some of these industries require nitrogen with a purity greater than 99.5%, while others require high-quality nitrogen with a purity greater than 99.9995% and a dew point below -65°C. Metal production and processing manufacturing steel, iron, copper, aluminum products annealing, carbonization, high-temperature furnace protection, low-temperature assembly and plasma cutting of metal parts, etc. Metal heat treatment provides protective gas and safety gas for industrial furnaces during bright annealing, bright quenching and other heat treatment processes to prevent oxidation of products. Nitrogen source for heat treatment such as bright quenching, bright annealing, nitriding, nitrocarburizing, soft carbonization, and shielding gas during welding and powder metallurgy sintering. Used for annealing protection of alloy steel and high carbon steel in metal heat treatment applications Atmosphere, metal powder sintering protective atmosphere, nitriding treatment, furnace cleaning and purging gas, etc., Durr Gas provides high-quality nitrogen with a purity of greater than 99.9995% and a dew point of less than -65 ℃. The nitrogen-based atmosphere heat treatment with the basic ingredients of nitrogen flavor is a new technology and new process for energy saving, safety, environmental pollution and full utilization of natural resources. It has been shown that almost all heat treatment processes, including quenching, annealing, carburizing, carbonitriding, nitrocarburizing, and carbonitriding processes, can be completed with a nitrogen-based atmosphere, and the quality of the metal parts processed can be compared with The traditional endothermic atmosphere treatment is comparable. Aluminum products, aluminum profile processing, aluminum thin rolling and other gas protection in the aluminum processing industry. Powder metallurgy powder sintering, nitrogen protection in the sintering of magnetic materials. Synthetic fiber is filled with nitrogen and pressed material, drawing to prevent oxidation. Nitrogen-filled lead-free solder is used for reflow soldering and wave soldering. Metallurgical industry: protective gas for continuous casting, continuous rolling, steel annealing; converter top and bottom combined nitrogen blowing steelmaking, converter steelmaking sealing, blast furnace roof sealing, blast furnace ironmaking coal powder injection gas, etc. The application of metal deep processing nitrogen in steel is mainly used as a protective gas, such as steel rolling, galvanizing, chromium plating, continuous casting, etc., all use nitrogen as a protective gas, and the purity of nitrogen is required to be above 99.99%. Gas solution, nitrogen purity can reach 99. 9995%. Medium and high voltage cables need to be cross-linked with nitrogen and inert gas. Polyethylene insulation material added with peroxy compound cross-linking agent is used to complete the conductor shielding layer-insulating layer-through three-layer co-extrusion. After the insulating shielding layer is extruded, it is continuous and uniform The cross-linking process is completed through a sealed cross-linking tube filled with high temperature and high pressure nitrogen. The heat transfer medium is nitrogen (inert gas), the cross-linked polyethylene has excellent electrical properties, and the production range can reach 500KV.

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2018-11-05 19:21
  • Views:35
Information

1) Metallurgy and metal processing industries

  Used for annealing shielding gas, sintering shielding gas, nitriding treatment, furnace cleaning and purging gas, etc. It is widely used in metal heat treatment, powder metallurgy, magnetic materials, copper processing, metal wire mesh, galvanized wire, semiconductor, powder reduction and other fields. Some of these industries require nitrogen with a purity greater than 99.5%, while others require high-quality nitrogen with a purity greater than 99.9995% and a dew point below -65°C. Metal production and processing manufacturing steel, iron, copper, aluminum products annealing, carbonization, high-temperature furnace protection, low-temperature assembly and plasma cutting of metal parts, etc. Metal heat treatment provides protective gas and safety gas for industrial furnaces during bright annealing, bright quenching and other heat treatment processes to prevent oxidation of products. Nitrogen source for heat treatment such as bright quenching, bright annealing, nitriding, nitrocarburizing, soft carbonization, and shielding gas during welding and powder metallurgy sintering. Used for annealing protection of alloy steel and high carbon steel in metal heat treatment applications Atmosphere, metal powder sintering protective atmosphere, nitriding treatment, furnace cleaning and purging gas, etc., Durr Gas provides high-quality nitrogen with a purity of greater than 99.9995% and a dew point of less than -65 ℃. The nitrogen-based atmosphere heat treatment with the basic ingredients of nitrogen flavor is a new technology and new process for energy saving, safety, environmental pollution and full utilization of natural resources. It has been shown that almost all heat treatment processes, including quenching, annealing, carburizing, carbonitriding, nitrocarburizing, and carbonitriding processes, can be completed with a nitrogen-based atmosphere, and the quality of the metal parts processed can be compared with The traditional endothermic atmosphere treatment is comparable. Aluminum products, aluminum profile processing, aluminum thin rolling and other gas protection in the aluminum processing industry. Powder metallurgy powder sintering, nitrogen protection in the sintering of magnetic materials. Synthetic fiber is filled with nitrogen and pressed material, drawing to prevent oxidation. Nitrogen-filled lead-free solder is used for reflow soldering and wave soldering. Metallurgical industry: protective gas for continuous casting, continuous rolling, steel annealing; converter top and bottom combined nitrogen blowing steelmaking, converter steelmaking sealing, blast furnace roof sealing, blast furnace ironmaking coal powder injection gas, etc. The application of metal deep processing nitrogen in steel is mainly used as a protective gas, such as steel rolling, galvanizing, chromium plating, continuous casting, etc., all use nitrogen as a protective gas, and the purity of nitrogen is required to be above 99.99%. Gas solution, nitrogen purity can reach 99. 9995%. Medium and high voltage cables need to be cross-linked with nitrogen and inert gas. Polyethylene insulation material added with peroxy compound cross-linking agent is used to complete the conductor shielding layer-insulating layer-through three-layer co-extrusion. After the insulating shielding layer is extruded, it is continuous and uniform The cross-linking process is completed through a sealed cross-linking tube filled with high temperature and high pressure nitrogen. The heat transfer medium is nitrogen (inert gas), the cross-linked polyethylene has excellent electrical properties, and the production range can reach 500KV.

2) Chemical and new materials industries

  Mainly used for chemical raw material gas, pipeline purge, atmosphere replacement, protective atmosphere, product transportation, etc. Mainly used in chemical, spandex, rubber, plastics, tires, polyurethane, biotechnology, intermediates and other industries. Many chemical industries do not require high nitrogen purity, and many of them can be used with a purity greater than 98%. Acrylic acid oxidation and explosion-proof, float glass process, protect the chemical industry, create an oxygen-free atmosphere in the chemical process, improve the safety of the production process, and protect the gas in the replacement, cleaning, sealing, leak detection, and dry quenching of the power source of fluid transportation. ; Catalyst regeneration, petroleum fractionation, chemical fiber production and other gas use in the petroleum industry to improve petroleum processing and refining technology, oil storage and pressurization of oil and gas field wells, pipeline cleaning and purging, solvent recovery, etc. Nitrogen filling and purification of storage, containers, catalytic cracking towers, pipelines, etc.; offshore oil development such as air pressure leak testing of pipeline systems; gas covering of platforms in offshore oil exploitation, pressure injection of nitrogen for oil exploitation, storage tanks, containers, etc. Chemical glass manufacturing industry prevents surface oxidation and heating furnace cooling in the glass manufacturing process. Gas protection during the production of float glass to prevent oxidation of the tin bath. Protection in the production process of float glassIn the float glass production process, the floating medium is easily oxidized at the high temperature of the tin bath, which increases the loss of tin and causes various defects on the surface of the glass plate. Therefore, it must Pass the protective gas nitrogen into the tin bath, and add 5%~10% hydrogen at the same time, the tin bath forms a reducing atmosphere, and the tin oxide is reduced to tin again. By adopting Durr gas's ammonia decomposition to produce nitrogen and hydrogen mixed gas instead of water electrolysis for hydrogen production, and the practical application in multiple float glass production lines, the production equipment of low energy consumption, simple operation, and relatively low safety and explosion-proof grade protective gas production equipment is put into use Going to the float glass production line has carried out a beneficial exploration for the current production of low, medium and high-grade float glass to reduce the cost of hydrogen. Rubber rubber vulcanization, tire crushing, etc. High pressure molding anti-oxidation, wire and cable gas protection. Chemical fertilizer industry: Nitrogen fertilizer raw materials; gas for replacement, sealing, washing, protection of catalysts, etc. Plastic industry: pneumatic transmission of plastic particles; anti-oxidation in plastic production and storage; rubber industry: packaging and storage of rubber; tire production, etc. in chemical fiber production Application in the process: In the production of chemical fiber, high-purity nitrogen is often used as a protective gas to prevent chemical fiber products from being oxidized during production and affecting the color. The higher the purity of nitrogen, the more beautiful the color of chemical fiber products.

3) Food and pharmaceutical industries

  Mainly used in food packaging, food preservation, medicine packaging, medicine replacement gas, medicine conveying atmosphere. Generally, the produced nitrogen gas must be treated with sterilization, dust removal, and water removal to meet the special requirements of the industry. The food industry does not have high requirements for nitrogen, many of which can meet the requirements with a purity of 98% or more. The pharmaceutical industry usually requires nitrogen with a purity of 99.9%. When the amount of nitrogen used in the food industry is small, membrane separation is often used to produce nitrogen, and when the amount of nitrogen is large, pressure swing adsorption is often used to produce nitrogen. Scientific research and medical deep hypothermia and cryotherapy, etc. Pharmaceutical raw materials, nitrogen-filled packaging and transportation of medicines, as well as moth-proof and anti-corrosion protection of Chinese herbal medicines. Beer and beverage technology, preservation and storage. Pharmaceutical industry: nitrogen-filled storage and preservation of traditional Chinese medicines (such as ginseng); nitrogen-filled western medicine injections; nitrogen-filled storage and containers; medicinal nitrogen equipment (nitrogen purity 99. 99%) is based on the experience of professional research and development of pressure swing adsorption nitrogen generators in recent years. The medicinal nitrogen generator developed according to GMP specifications has low operating cost and stable nitrogen purity compared with cylinder nitrogen (or liquid nitrogen) in use. , Easy to operate. The food industry is used for food preservation and food storage, food drying and sterilization, fast food freezing, etc. Nitrogen-filled storage and preservation of fruits, vegetables, tea, etc. is also the most advanced method. This method can slow down the metabolism of fruits, vegetables, vegetable leaves, etc. in a high-nitrogen and low-oxygen environment, as if entering a hibernation state, inhibiting post-ripening, so that they can be kept fresh for a long time. According to experiments, apples stored in nitrogen are still crispy and refreshing after 8 months. Food preservation: nitrogen-filled storage and preservation of grains, fruits, vegetables, etc.; nitrogen-filled fresh-keeping packaging for meat, cheese, mustard tubers, tea and coffee, etc. ; Nitrogen-filling and oxygen-discharging preservation of fruit juice, raw oil and jam; purification and covering of various bottles of wine use nitrogen to make the grain in a dormant and hypoxic state and slow metabolism, which can achieve good insect-proof, mildew-proof and anti-deteriorating effects , The grain is not polluted. The use of nitrogen to exhaust the air to store grains such as rice, wheat, barley, corn and rice can prevent insects, heat, and mildew, so as to maintain the quality for the summer. In this method, the food is tightly sealed with plastic cloth, first pumped into a low vacuum state, and then filled with nitrogen with a purity of about 98% until the internal and external pressures are balanced. This can make the grain pile lack of oxygen, reduce the respiration intensity of the grain, inhibit the reproduction of microorganisms, and all the borers will die due to lack of oxygen within 36 hours. This method of reducing oxygen and killing insects can not only save a lot of costs (about 1% of the cost of fumigation with highly toxic drugs such as zinc phosphide), but also can maintain the freshness and nutritional value of food and prevent bacterial infection And drug contamination. The preservation cost of apples per kilogram is about 1 dime. Nitrogen-filled storage can greatly reduce fruit loss during peak seasons, ensure the supply of fruit in the off-season market, improve the quality of exported fruits, and increase foreign exchange income. The tea is packed with air and nitrogen, that is, the tea is put into double-layer aluminum platinum (or nylon polyethylene). One aluminum composite foil) inside the bag, evacuate air, inject nitrogen, and seal it. One year later, the tea quality is fresh, the tea soup is clear and bright, and the taste is pure and fragrant. Obviously, using this method to keep fresh tea leaves is much better than using vacuum packaging or freezing packaging. At present, many foods are still vacuum-packed, frozen-packed, and vacuum-packed which are easy to leak. The frozen packing is easy to deteriorate, and they are not packaged well with vacuum nitrogen filling. The tea is packed with air and nitrogen. Put the tea in a double-layer aluminum platinum (or nylon polyethylene-aluminum composite foil) bag, exhaust air, inject nitrogen, and seal it. One year later, the tea quality is fresh, the tea soup is clear and bright, and the taste is pure and fragrant. Obviously, using this method to keep fresh tea leaves is much better than using vacuum packaging or freezing packaging. At present, many foods are still vacuum-packed, frozen-packed, and vacuum-packed which are easy to leak. The frozen packing is easy to deteriorate, and they are not packaged well with vacuum nitrogen filling. The tea is packed with air and nitrogen. Put the tea in a double-layer aluminum platinum (or nylon polyethylene-aluminum composite foil) bag, exhaust air, inject nitrogen, and seal it. One year later, the tea quality is fresh, the tea soup is clear and bright, and the taste is pure and fragrant. Obviously, using this method to keep fresh tea leaves is much better than using vacuum packaging or freezing packaging. At present, many foods are still vacuum-packed, frozen-packed, and vacuum-packed which are easy to leak. The frozen packing is easy to deteriorate, and they are not packaged well with vacuum nitrogen filling.

4) Electronics industry

  Used for packaging, sintering, annealing, reduction, storage, etc. of electronic products. Mainly used in wave soldering, reflow soldering, crystal, piezoelectric, electronic ceramics, electronic copper tape, batteries, electronic alloy materials and other industries. The electronics industry generally has relatively high requirements for nitrogen, usually 99.9% or 99.99%, and more than 99.99% nitrogen. Atmosphere protection, cleaning, chemical recycling, etc. in the manufacturing process of semiconductors and integrated circuits in the electronics industry. Nitrogen source for large-scale integrated circuit, color TV picture tube, TV and radio cassette components and semiconductor components. In the production process of electronic components and semiconductor components, nitrogen with a purity of more than 99.999% must be used as a protective gas. At present, my country has used high-purity nitrogen as a carrier gas and protective gas in the production process of color TV picture tubes, large-scale integrated circuits, liquid crystals and semiconductor silicon wafers. SMT industry Now, the global manufacturing industry must meet lead-free standards, and more and more manufacturers are using new reflow ovens with nitrogen options to respond to the lead-free plan. Because the nitrogen-based atmosphere can prevent the metal surface from oxidizing during the heating process. The gas solution provided by Durr Gas can ensure the correct activation of the flux, reduce the residual amount of some flux, enhance the welding quality, and make the welding surface more beautiful.

Our company has a professional catalog, which is satisfied with the nitrogen generator equipment needed in all walks of life. Welcome everyone to come to inquire

Scan the QR code to read on your phone

Dongguan Ruibang Nitrogen Purification Equipment Co., Ltd.  © Copyright 2021    粤ICP备09133359号    Powered by www.300.cn