49results about How to "Reduce gasification rate" patented technology

The invention relates to a seamless calcium line and a preparation method thereof. The seamless calcium line which is a line body formed by wrapping a solid calcium core with a shell is characterized in that: the shell is a seamless steel shell, and the weight ratio of the solid calcium core to the seamless shell in the line body of each unit length is 1:2.3-5.7. The seamless calcium line of the invention has the following advantages: the rigidity of the calcium line is high, so the line can be fed to deep parts of a steel ladle, splashing can be alleviated or avoided, calcium can be uniformly distributed in the steel ladle, the calcium line usage efficiency is greatly improved, the calcium recovery rate is improved 2-5 times, and the inclusion removal effect is good; and the feeding amount of a core wrapping line is reduced, the calcium processing time is saved, the temperature loss in the molten steel calcium processing process is reduced, and the molten steel nitrogen and oxygen increasing case in the molten steel processing process are effectively improved. The seamless calcium line produced with the technology of the invention has the advantages of high efficiency, low cost, and easy enforcement and popularization.

The present invention relates to a 3D printing gold spraying device and its 3D printing device and control method. The 3D printing gold spraying device includes a metal droplet 3D printing device, the metal droplet 3D printing device is provided with a metal droplet output port, and also includes a The supersonic air curtain disperser is used to blow out the metal droplets coming out of the metal droplet output port, and the supersonic air curtain disperser is arranged outside the metal droplet output port. This 3D printing gold spraying equipment uses the combination of metal molten droplet 3D printing technology and supersonic air curtain disperser to blow out metal molten droplets to realize gold spraying. In this process, the oxidation and gasification rate of metal molten material is low, and the material utilization rate is high. ; Even the metal material sprayed on other positions during gold spraying can be put into the metal droplet 3D printing device to be melted and reused, which is more environmentally friendly.

The invention discloses an upward drilling negative pressure advancing type injection low-temperature fluid staged cycle fracturing method. First, water jet slotting equipment is used to set up three crack areas, and water is injected through a water injection pipe to fill up a hydraulic plugging device. In this way, three sealed fracturing chambers are formed, and the three sealed fracturing chambers are placed in a negative pressure state. Cryogenic fluid is injected into the three sealed fracturing chambers, and the cryogenic fluid fills each sealed fracturing chamber in turn, and the three sealed fracturing chambers are filled with low-temperature fluid. The fracture area in the fracturing chamber is subjected to cold impact fracturing. As the low-temperature fluid in the sealed fracturing chamber is heated and gasified by the geothermal heat, the internal pressure of the low-temperature fluid exhaust pipe exceeds the opening threshold of the safety pressure relief valve, and the safety pressure relief valve opens to make the corresponding The variable gas is discharged, thereby reducing the air pressure inside the low-temperature fluid exhaust pipe and each sealed fracturing chamber, so that the cycle is repeated, and the gas expansion force fracturing is performed on each sealed fracturing chamber multiple times. It can effectively ensure the rapid injection of low-temperature fluid and the cracking effect on coal and rock mass, and will not cause pollution to the surrounding environment.

The invention relates to a device and a method for cryogenic separation and purification of nitrogen and liquid ammonia. According to the method, the air as a raw material sequentially passes through an air compression system for compression, a pre-cooling system for cooling, and a purification system for impurity removal, followed by entering a fractionating tower; the air entering the fractionating tower is divided into two parts, wherein one part of the air enters a pressure boost end for boosting pressure, is subjected to heat exchange through a cooler, and enters a main heat exchanger, the air is pumped by the lower portion of the main heat exchanger to enter an expansion end for heat insulation expansion, and the expanded air is recuperated by the main heat exchanger and discharged out of a cooling box; the other part of the air directly enters the main heat exchanger to be cooled to a liquefaction point and then enters a single-stage rectifying tower for rectification. A nitrogen product is pumped from the top of the single-stage rectifying tower, is recuperated to a normal temperature by the main heat exchanger, and enters a nitrogen collection unit through a valve, a liquid ammonia product is pumped from a main cooled liquid nitrogen side, the liquid ammonia product and a small part of returned liquid ammonia are subjected to heat exchange and supercooling through a liquid ammonia supercooler, and subsequently, the liquid ammonia product enters a liquid ammonia collection unit through a valve. According to the device and the method for cryogenic separation and purification of the nitrogen and the liquid ammonia, the process flow is simple in operation, high in extraction rate, low in energy consumption, and meanwhile, device investment costs are low.