225 results about "Nozzle clogging" patented technology

It is an object of the invention to provide a technique for reducing the likelihood that cleaning will cause nozzle clogging. In periodic automatic cleaning of a printer that is not being used, the ejecting of ink droplets from each nozzle is tested prior to the cleaning to determine whether each nozzle is an operating nozzle capable of ejecting ink droplets or a non-operating nozzle incapable of ejecting ink droplets. The nozzles are only cleaned if non-operating nozzles are detected. The testing of the nozzles is also automatically carried out after cleaning.

A fluid dispensing system for ink-jet printing can comprise an ink-jet ink including anionic dye colorant and from 0.05 wt % to 1.0 wt % of an anionic dispersant polymer, and a fixer composition including a cationic crashing agent that is with a component of the ink-jet ink. The fixer composition can be stored separately from the ink-jet ink, and the fluid dispensing system can be configured for overprinting or underprinting the fixer composition with respect to the ink-jet ink.

The invention relates to an ultra-low-carbon steel slag modifier and an addition method thereof. The ultra-low-carbon steel slag modifier is formed by carrying out dry mixing on passivated aluminum powder, alumina and active lime. The ultra-low-carbon steel slag modifier comprises the following chemical components in percentage by weight: 10-20% of Al, 15-25% of Al2O3, 40-50% of CaO, at most 8% of SiO2, at most 1% of C, at most 0.05% of S and at most 0.05% of P. After an RH (Ruhrstahl Heraeus, vacuum circulation degassing) furnace finishes treating molten steel, the steel slag modifier is added to 2-4 times of the amount of slag on the ladle top, and the molten steel is stirred in weak argon for 5-10 minutes. The invention can obviously lower the degree of turbulence in the pouring process of IF (interstitial-free) steel, degrade the oxidizability of the IF steel slag, reduce the reoxidation generated in the pouring process of the molten steel, avoid nozzle clogging, enhance the pourability of the molten steel, and ensure the quality of the molten steel.

The invention provides a method for producing medium and low carbon aluminum killed steel, which comprises the following steps of: controlling the content of sulfur in molten iron to be not more than 0.015 percent; primarily smelting the molten iron to form molten steel, and tapping; adding an aluminum deoxidizer into the molten steel when 20 to 30 weight percent of molten steel is tapped; adding4.0 to 6.0kg of active lime and fluorite in an amount which is 0.2 times that of the active lime into each ton of molten steel when 31 to 50 weight percent of molten steel is tapped; performing argonblowing refining for the first time; adding aluminum in two or three batches and 1.5 to 4kg of refining slag into each ton of steel in a steel ladle, heating, and refining; performing calcium treatment on the molten steel; performing argon blowing refining for the second time; and performing continuous casting. By the method, the castability of the molten steel can be improved, the phenomenon of water nozzle clogging is avoided, and the continuous casting heats of a single tundish in the continuous casting process of the medium and low carbon aluminum killed steel are not less than 8 heats.

The invention relates to a continuous casting tundish diffuse-type gas-permeable ring upper nozzle brick cup and an argon blowing refining method thereof. The upper nozzle brick cup comprises an upper nozzle brick cup body, diffuse-type gas-permeable rings, a gas chamber and a gas inlet pipe, wherein the gas-permeable rings are uniformly arranged in a circle; the gas-permeable rings and the circular gas chamber are arranged in the upper nozzle brick cup body; the air chamber is arranged at the bottoms of the diffuse-type gas-permeable rings and communicate with the diffuse-type gas-permeable rings; the upper parts of the gas-permeable rings extend out of the upper surface of the upper nozzle brick cup body by 5 to 10 mm; the gas inlet pipe is connected to one side part of the gas chamber; one end of the gas inlet pipe communicates with the air chamber; the other end of the gas inlet pipe extends out of one side part of the upper nozzle brick cup body, is connected with a metal pipe fitting and communicates with an external argon gas source; an upward circular air curtain barrier is formed after argon gas is blown into the gas inlet pipe, so that gas washing of molten steel entering an upper nozzle is realized, and floating and removing of inclusions are promoted; and a certain quantity of argon bubbles enter the upper nozzle along with a steel flow, so that a stable and continuous circular gas flow is formed, which not only solves the problem of nozzle clogging, but also solves the technical problem that protective argon bubbles enter steel to cause sub-surface bubbles of a casting blank.

The invention discloses a production method of billet continuous casting bearing steel. The method comprises the following steps: (1) injecting molten steel after refinement into a tundish and controlling the superheat degree of the molten steel in the tundish to be 25-45 DEG C; (2) injecting the molten steel in the tundish into a crystallizer for crystallization under the electromagnetic stirring effect of the crystallizer, and adding crystallizer protection slag into the crystallizer; (3) pulling out crystals from the crystallizer to obtain a continuous casting billet, and cooling the continuous casting billet by enabling the continuous casting billet to pass through a secondary cooling zone and an air cooling zone in sequence. According to the production method provided by the invention, the occurrence rate of nozzle clogging of the tundish can be reduced and the quality defects of slag pits in the surface of the continuous casting billet, cracks on the surface and under the skin of the casting billet, segregation and looseness of the casting billet and the like in a billet continuous casting production process are overcome.

The present invention provides a mechanical arm-based 3D food printer which includes a mechanical arm, a feeding device, a heating device and a cooling device The feeding device is arranged on the mechanical arm. The mechanical arm-based 3D food printer realizes a 360 degree all-round print around the mechanical arm by controlling the mechanical arm movement, is large print range and open in print space, and can print multiple food once and print food pattern anywhere. The heating device installed on the feeding device avoids food raw material condensation and nozzle clogging caused by food cooling and improves the printing accuracy. The cooling device is used to conduct temperature lowering for just print food.

In an apparatus producing a high-quality and high-resolution image having high water and light resistances with an orifice having a diameter less than φ25 μm (less than 500 μm² in terms of cross-sectional area of the orifice) by use of a fine particle dispersion recording composition, nozzle clogging can be prevented. A recording is accomplished by a liquid jet recording apparatus for ejecting a recording composition including dispersed fine particles from a small orifice toward a receiving medium, wherein a size D_p of the fine particles and a diameter D_o of the small orifice are determined by a relationship 0.001≦D_p/D_o≦0.01.

The invention provides an RH refining method of low-carbon stainless steel. Under the condition that the incoming carbon and oxygen contents are high, the carbon, oxygen and hydrogen contents of molten steel can be fast reduced to the ultralow level through high-temperature preliminary decarburization, oxygen blowing forced decarburization, hydrogen blowing deoxygenation and vacuum degassing, meanwhile, chromium keeps the high yield, the slag amount can be reduced, aluminum is not used for deoxygenation, and aluminum oxide occluded foreign substances are reduced. The RH refining method can befurther used for smelting low-carbon high-aluminum stainless steel, the aluminum adding process and the hydrogen blowing process cooperate, aluminum is added after hydrogen blowing is circulated for aperiod of time, hydrogen blowing continues, the content of acid soluble aluminum in the steel can be increased, aluminum consumption can be reduced, and the number and particle size of the aluminum oxide occluded foreign substances are reduced. By means of the RH refining method of the low-carbon stainless steel, the cleanliness degree of the molten steel can be improved, nozzle clogging in the continuous casting process is avoided, the production efficiency is improved, the production cost is reduced, and the product quality is improved.

The invention relates to a continuous casting tundish breathable ceramic tube upper nozzle brick cup and an argon blowing refining method thereof. The upper nozzle brick cup comprises an upper nozzle brick cup body, a plurality of ceramic tubes, a gas chamber and a gas inlet pipe, wherein the ceramic tubes are uniformly arranged in a circle; the ceramic tubes and the circular gas chamber are arranged in the upper nozzle brick cup body; a plurality of sockets are uniformly arranged on the gas chamber in a circle; the top ends of the ceramic tubes extend out of the upper surface of the upper nozzle brick cup body by 5 to 10 mm; the lower ends of the ceramic tubes are fixed in the sockets on the gas chamber, and communicate with the gas chamber; the gas inlet pipe is connected to one side part of the gas chamber, and communicates with an external argon gas source by being connected with a metal pipe fitting; an upward circular air curtain barrier is formed after argon gas is blown into the gas inlet pipe, so that gas washing of molten steel entering an upper nozzle is realized; and a certain quantity of argon bubbles enter the upper nozzle along with a steel flow, so that a stable and continuous circular gas flow is formed, which not only solves the problem of nozzle clogging, but also solves the technical problem that protective argon bubbles enter steel to cause sub-surface bubbles of a casting blank.

A clog-resistant injector spray nozzle allows relatively unobtrusive insertion through a small access aperture into existing ductwork in occupied buildings for atomized particulate sealing of a ductwork. The spray nozzle comprises an easily cleaned and easily replaced straight liquid tube whose liquid contents are principally propelled by a heated propellant gas, such as heated air. Heat transfer is minimized from the heated propellant gas to the liquid tube until they both exit the injector, thereby greatly reducing the likelihood of nozzle clogging. A method of duct sealing using particles driven by heated propellant gas is described, whereby duct-sealing operations become both faster, and commercially practicable in inhabited commercial and residential buildings.

The invention provides a method for smelting phosphorus-containing ultra-low carbon steel. The method comprises the first step of pretreating molten iron, specifically, blowing desulphurizing powder into the molten iron to enable the S content to be less than or equal to 0.003wt%, the second step of conducting deoxygenation and decarburization in a converter, blowing oxygen for 15-18 min, adding slag making materials, conducting slag-stopping and steel tapping when the content of C in the molten steel is less than or equal to 0.06%, the content of O reaches 0.05-0.09%, and the temperature of the molten steel in the converter reaches 1680-1720 DEG C, and adding 2-5 kg/t lime through an argon station, the third step of carrying out ladle furnace (LF) refining, specifically, adding slag former into a steel ladle, carrying out bottom argon blowing and stirring, transferring the molten steel to carry out RH vacuum refining, decarburization and denitrification when the temperature of the molten steel reaches 1630-1650 DEG C, carrying out alloying in batches when the content of C in the steel is less than or equal to 0.0050wt%, carrying out still standing for 15-25 min and then continuous casting when the content of compositions and temperature reach the target content and temperature, blowing argon into spaces between plates at a long nozzle, a stopper rod, an upper nozzle and a submerged nozzle when pouring is conducted on a tundish, and adding carbon-free covering agents to protect pouring. By means of the method, the purity degree of the molten steel and the castability of the steel can be improved, nozzle clogging is effectively controlled, the smelting production efficiency and the steel quality are improved, consumption of spare parts is reduced, and the cost of per ton of steel is lowered.

The invention provides a technological method for improving the equiaxed crystal ratio of bistable ferrite stainless steel continuous casting billets. The technological method comprises the steps of aprimary melting furnace, AOD, VOD, LF and continuous casting. According to the technological method provided by the invention, the equiaxed crystal ratio of the bistable ferrite stainless steel continuous casting billets is improved largely, and the cold machining and molding performances of ferrite stainless steel as well as the surface quality of products are improved; and the problems of nozzle clogging and blockage caused by TiN and TiOx generated by adding excessive Ti in the continuous casting technological process are solved effectively.

A cleaning device includes a discharge nozzle that discharges cleaning liquid; a suction nozzle that sucks the cleaning liquid or reaction liquid in the cleaning tank or the reaction vessel; a discard vessel connected to the suction nozzle via a pipe to discard the cleaning liquid or the reaction liquid; a detecting unit that detects whether an electrostatic capacity at least between the suction nozzle and an electrode provided in the pipe exceeds a threshold value; a determination unit that determines that the suction nozzle is clogged when a totalizing time, for which the electrostatic capacity exceeds the threshold value during a preset clogging determination time, is longer than a totalizing time, for which the electrostatic capacity exceeds the threshold value during a preset normal determination time; and a control unit that stops the discharge nozzle from discharging the cleaning liquid to the reaction vessel when the suction nozzle is clogged.

The invention relates to a long continuous casting control method for titanium-containing austenitic stainless steel, and belongs to the technical field of stainless steel smelting. The control method comprises the steps of (1), after smelting of molten steel is completed in an electric-arc furnace, adding the molten steel into an AOD refining furnace for whole-process argon gas blowing type smelting; (2), after input of silicon iron and fluorite is completed during the reduction period, adding Al for deep deoxidization, carrying out reduction after stirring is completed and guaranteeing the tapping temperature; (3), after the molten steel subjected to AOD refining enters a ladle furnace, beginning to add titanium wires when the temperature is within the range from 1580 DEG C to 1590 DEG C and carrying out micro-stirring, wherein the addition amount of the titanium wires guarantees that the molten steel meets the requirement that titanium is greater than or equal to 6C; (4), carrying out tapping when the tapping compositions of the molten steel meet the standard requirements and guaranteeing the content of Ti*N and Ca/Al. According to the control method, the number of continuous casting furnaces is greatly increased by controlling O and N in the molten steel from AOD to the ladle furnace and restraining nozzle clogging material from the source, and the continuous casting length of production of stainless steel slabs with the section being 200mm*1530mm can be greater than 900 meters according to practical operation. The control method greatly lowers the smelting cost, lowers the rejection rate of casting blanks and the rejection rate after rolling and is suitable for large-scale production.

The invention provides a method of controlling molten steel pourability under the condition of calcium-free treatment. The method comprises the steps of: (1) carrying out pre-deoxidation before entering an LF (Ladle) furnace, ensuring end point carbon of a converter to be no more than 0.30 percent by virtue of a converter catching carbon technology, adding 2.5Kg of ferro-manganese-aluminum in the process from steel tapping to a steel ladle, and removing at least 95 percent of free oxygen in the molten steel; (2) rapidly producing white slags by virtue of the LF furnace, and ensuring the keeping time of the white slags to be no less than 12minutes; (3) carrying out LF furnace argon blowing-electrifying intelligent control, and intelligently controlling an LF furnace bottom blowing rate by phases and heating powers; and (4) carrying out argon blowing control by phases by virtue of a VD (Vacuum Ladle) furnace. With the adoption of the control method, the amount of molten steel continuous casting furnaces capable of treating without calcium reaches 45, and non-planned nozzle change due to poor molten steel mobility which is caused by reasons of steel breakout, nozzle clogging and the like does not exist.

The invention relates to a coupling impactor for oil drilling, which belongs to the technical field of oil drilling equipment. The impactor includes a shell, an upper joint, a lower joint, a central shaft, a turbine fixed valve, a turbine moving valve, an upper hammer body, and a lower hammer body. One end of the shell is threaded with an upper joint. The fixed valve and the turbine moving valve are equipped with a central shaft; the central shaft is fixed with an upper hammer body; the central shaft on one side of the upper hammer body is covered with a lower hammer body, and the lower hammer body is keyed to the housing. Under the action of drilling fluid, the central shaft drives the upper hammer body to produce periodic axial impact and periodic torsional impact on the lower hammer body. At the same time, the lower end of the central shaft makes the upper piston body periodically compress the fluid in the cavity, Before the drilling fluid enters the drill bit, it periodically produces a certain pressurization effect and forms pulse fluctuations. The entire impactor, under the above coupling action, can effectively improve the contact stress between the drill bit and the rock and the rock breaking effect, and improve the drill bit. While improving the rock-breaking efficiency, improving the drilling speed and reducing the drilling cost, it can effectively avoid the phenomenon that the nozzle of the drill bit is clogged and the bit produces mud balls.

The cleaning process best suited to the condition of an inkjet printer is selected and run, thereby removing nozzle clogging without wastefully consuming ink. The first time a cleaning switch 7 is operated a CL1 cleaning process is run. If the cleaning switch 7 is pressed a second time and the print pass count is less than e.g., 400, a CL2 cleaning process that uses more ink than the CL1 process is used to clean the recording head, but if the print pass count is 400 or more, the CL1 cleaning process is used. If the print pass count is less than 400 the third time the switch is operated, the CL2 cleaning process is used, but the CL1 cleaning process is used if the print pass count is 400 or more. If the cleaning switch 7 is operated four or more times and the print pass count is less than 400, a YCL cleaning process that consumes substantially no ink is used to clean the recording head, but if the print pass count is 400 or more, the CL1 cleaning process is used.

The invention discloses a submersed nozzle capable of reducing nozzle clogging. The submersed nozzle comprises a nozzle body, nozzle outlets are formed in the two sides of the lower portion of the nozzle body, and the lower edges of the nozzle outlets are in smooth transition. The inner walls of the upper and lower edges of a tapping opening are in smooth transition, eddy current generated at theposition in the molten steel flow process can be reduced, accumulation of inclusions is reduced, and the aim of reducing nozzle clogging is further achieved.