40results about How to "Shorten blowing time" patented technology

The invention relates iron melt improving vanadium content and controlling calcium content cooling agent and the technology, specially relates the cooling agent of adjusting the proportion of cooling agent to stabilize calcium content in vanadium slag and the technology. The technology comprises the 56-60wt% iron scale, 30-40wt% iron concentrate powder containing vanadium, and 5-10wt% anchoring agent. The method stabilizes the calcium content and iron content in vanadium slag, and effectively solves the problems of great fluctuation of vanadium slag composition and superstandard calcium and iron. By controlling the thermoregulation material to meet the requirements of the improving vanadium temperature and calcium oxide content, the method improves the vanadium slag grade and extraction rate. The invention possesses the following characteristics: 1 shortening the converting time; 2 improving the vanadium slag grade and extraction rate, and stabilizing the calcium oxide content; 3 reducing the iron loss.

The invention relates to a compressed gas drying device. The invention aims to provide the device with characteristics of complete regeneration of an adsorbent and lower outlet air pressure dew point. The invention adopts the technical proposal that: in a compressed gas waste heat regeneration high-efficiency drying device, a first path of pipeline is connected with at least two drying pipelines in parallel, and then is connected with an inlet of a freeze drier after the first path of pipelines is orderly connected with two adjusting valves in series; each drying pipeline is orderly connected with a valve and a forward inlet of a drying tower in series; a pipeline on an outlet of the freeze drier is divided into at least two branch paths, wherein, each branch path is connected with a valve, and then is connected to a reverse inlet of the drying tower; a second path of pipeline is divided into two branch paths; the first branch path is divided into at least two shunts; each shunt is connected with a valve, and then is connected with a reverse inlet of the drying tower; the second shunt is connected between the two adjusting valves through a water cooler and a gas-liquid separator in sequence; and the forward inlets of the drying towers are connected with a valve respectively, and then are connected with an air outlet in parallel.

In apparatuses for automatically folding items of laundry, items of laundry of different lengths usually are folded in an irregular sequence, resulting in idling and/or delays in particular in the longitudinal-folding station (13). The invention provides for determining the length of each item of laundry (10) upstream of the longitudinal-folding station (13) and for accelerating short items of laundry as they are transported through the longitudinal-folding station (13), whereas larger items of laundry are slowed down in the longitudinal-folding station (13). Following completion of the longitudinal-folding operation, the respectively folded item of laundry is located at the end of the longitudinal-folding station (13) and, immediately following completion of the longitudinal folding, is transported away out of the longitudinal-folding station (13). This avoids unnecessary idling times, and for relatively long items of laundry to be folded longitudinally during continuous, relatively slow onward transportation through the longitudinal-folding station (13).

The invention discloses a converter bottom blowing process for for grouped air blowing control of bottom blown bricks. The converter bottom blowing process includes the following two steps that firstly, bottom blown brick grouping is conducted, the bottom blown bricks located on the same circle are divided into two groups; and secondly, bottom blown brick grouped air volume control is carried out,in the converter production process, air volume control is carried out on the two groups of the bottom blown bricks, under the condition that the total air volume of bottom blowing remains unchanged,the ratio of the first group air volume to the second group air volume is 4:1-8:1 in the first furnace air volume opening mode of furnace service, the second group air volume guarantees that the bottom blowing brick process is not blocked, the second furnace air volume opening mode of furnace service is opposite to the first furnace air volume opening mode of furnace service, the ratio of the second group air volume to the first group air volume is 4:1-8:1, the first group air volume guarantees that the bottom blowing brick process is not blocked, and then heat is carried out alternately according to the first furnace air volume opening mode and the second furnace air volume opening mode. The flow of molten steel in a converter molten pool is accelerated, the reaction kinetics condition is improved, meanwhile the erosion of the bottom blown bricks is slowed down, the service life of the bottom blown bricks is prolonged, and the effect of bottom blowing is guaranteed while the furnaceage of a converter is prolonged.

The invention belongs to the technical field of copper smelting of a converter, and discloses a method for judging the end point time of copper smelting of the converter. The method for judging the end point time of copper smelting of the converter comprises the following concrete steps of S1, conducting sampling analysis in advance for copper matte put into the converter: putting the copper matteinto copper matte pack after the copper matte is discharged from the previous process, and meanwhile sampling the copper matte and sending to a laboratory for analyzing copper content, iron content and sulfur content; S2, calculating the target time and the adding amounting of a fusing agent of the first cycle; and S3, calculating the target time and the adding amounting of the fusing agent of the second cycle. The method can realize continuous detection and continuous calculation of blowing end point time judgment and provide reliable data for operators, thus improving the utilization rate of the converter and reducing unnecessary operation of converter shaking. The method saves a lot of blowing time, improves the utilization rate of the air flow into the converter, reduces the air discharge amount of air and achieves the purpose of saving energy at the same time, and ensures the continuous blowing production.

The invention relates to the field of car adjustors, in particular to a mould for manufacturing car adjustors and particularly provides a car adjustor mould core manufacturing method. The car adjustormould core manufacturing method comprises the steps that silica sand, a curing agent and alkaline phenolic resin are sequentially mixed to obtain alkaline phenolic resin sand, the alkaline phenolic resin sand is added into a core box of a cold core box core shooting machine to be formed and hardened, and then a mould core is taken out; the mould core is immersed into mixed cohering liquid and then taken out to be dried in air; the mould core is roasted till the temperature is 1200 DEG C or over and then cooled; and the mould core is subjected to core leach to obtain a car adjustor mould core.According to the car adjustor mould core manufacturing method, the manufacturing cost can be reduced, the heat stability of the mould core is good, the hardening time can further be shortened while it is ensured that the alkaline phenolic resin sand is sufficiently formed, the surface quality and the geometric dimension accuracy of the mould core are ensured, and the service life and manufacturing accuracy of the mould core are ensured; and the labor intensity can further be reduced, the labor condition and work environment are greatly improved, environment pollution is reduced, and energy issaved.

The invention relates to a method for blowing high-grade matte through a horizontal rotary furnace. The technical problem is solved that an existing matte blowing method is long in blowing cycle, lowin air supply time rate and low in single furnace output. According to the technical scheme, the method includes the following steps of firstly, selecting the matte at the grade of 70-75% as the blowing raw material; secondly, conducting thermal insulation on a hearth through natural gas when the empty rotary furnace waits for the material; thirdly, adding 50 tonnages of the raw material into therotary furnace for blowing; fourthly, conducting blowing for 30-50 minutes, and then adding 25 tonnages of the raw material into the rotary furnace to continue the blowing; fifthly, conducting blowingfor 25-35 minutes, and then adding 25 tonnages of the raw material into the rotary furnace for blowing for 5 minutes, and then adding quartz stone into the furnace to continue the blowing; sixthly, continuing the blowing for 65-75 minutes, then conducting depositing for 5 minutes, and then discharging residues. When the high-grade matte is blown in the horizontal rotary furnace, a traditional two-cycle blowing method is changed into a single-cycle blowing method, the blowing time is shortened, and the method has the advantages of high safety coefficient, large cold material throughput, low inproduction cost and the like.

The invention discloses a flow control method powder blowing in a molten iron dephosphorization pretreatment process. The flow control method comprises the following specific steps of: firstly, arranging a nitrogen flow pressure detection sensor at the outlet end of a nitrogen flow pore plate to generate an actual pressure value of the nitrogen flow; next, transferring the actual pressure value of the nitrogen flow to a programmable controller to compare the actual pressure value of the nitrogen flow with a nitrogen flow pressure set value, and then carrying out flow control; and then, detecting the accumulated blowing quantity, and when the accumulated blowing quantity reaches a blowing quantity set value, ending the blowing. The flow control method can dynamically control the blowing speed through flow control according to the real-time powder blowing condition detected by the nitrogen flow pressure detection sensor, so that the stability of powder blowing is improved, pipelines are avoided being blocked by the powder, the blowing time of per ton of molten iron is shortened, the dephosphorization efficiency is improved, and the nitrogen energy consumption is reduced.

The invention belongs to the technical field of gold exchange equipment and particularly relates to a blow-drying device and a gold exchange machine. The blow-drying device comprises a clamping mechanism, an air blowing mechanism and a moving drive mechanism, wherein the clamping mechanism is used for clamping a gold cake, the air blowing mechanism comprises an air nozzle, the air nozzle is provided with a first groove, the two opposite wall faces of the first groove are both provided with air outlet holes, the moving drive mechanism is provided with one drive end, the drive end is connected with the air nozzle or the clamping mechanism, or the moving drive mechanism is provided with two drive ends, the two drive ends are connected with the air nozzle or the clamping mechanism correspondingly, and the moving drive mechanism is used for driving the clamping mechanism and the air blowing mechanism to be relatively close to or to be relatively away from to make the gold cake be stretchedinto the first groove or be moved out of the first groove to make the two air outlet holes perform back and forth air blowing on the two opposite side faces of the gold cake correspondingly. Accordingto the blow-drying device and the gold exchange machine, by means of the two-side back and forth blowing-sweeping method, water attached to the gold cake is quickly blown away and dried, the air blowing time is reduced, the blow-drying efficiency is high, and the customer use experience is improved.

The invention relates to an argon-oxygen furnace and an operation method thereof. The argon-oxygen furnace is characterized in that: I, the physical and chemical indexes of a magnesium-calcium brick for the working layer of a furnace lining meet requirements; II, a total included angle of blower guns is 108 to 120 DEG, the distance between the blower guns is no less than 380 mm, and the blower guns, blower gun bricks and adjacent bricks are bonded by using resin mortar; and III, the furnace lining undergoes maintenance and baking. The operation method is characterized in that: I, the content of Si in pre-melting liquid of smelting is no more than 0.30%; II, during blowing, the integral argon-oxygen furnace is backwardly revolved and tilted by 3 to 7 DEG; III, air feeding intensity of a top gun during decarburization in stage 1 to 3 is 0.85 to 1.40 Nm<3>/min.t; IV, the basicity of slag is 1.8 to 2.2; V, no-load time is less than 90 min, a furnace mouth is swayed down to 120 to 240 DEG, and if no-load time is greater than 90 min, on-line baking is carried out; and VI, temperature monitoring is carried out on steel plate surface temperature corresponding to easy-leaking points of the blower guns and slag lines in the whole process of furnace smelting. With the argon-oxygen furnace and the operation method thereof in the invention, the furnace life of the argon-oxygen furnace is prolonged to no less than 160 heats.

The invention discloses a water blowing and drying device for a rubber tube after static pressure detection, and belongs to the field of rubber tube drying. The water blowing and drying device for the rubber tube after static pressure detection is characterized in that a trailing water testing ball is arranged and can be blown into the bent middle part of the rubber tube for water testing after water blowing and drying are carried out for a certain time, the tailing water testing ball absorbs water that may exist in the middle of the rubber tube, when the trailing water testing ball is directly blown out of the rubber tube, it shows that the interior of the rubber tube is more accumulated water, when the trailing water testing ball is not blown out, the trailing water testing ball is pulled out of the rubber tube through a pull rope, the distribution range of toner particles on a color inspection suction ring is enlarged, it shows that the interior of the rubber tube contains accumulated water, when the color inspection suction ring does not change obviously, it means that the interior of the rubber tube contains very little water accumulation, and the rubber tube can be dried by continuing to blow water for 1-2 minutes. Compared with the prior art, the water blowing and drying device for the rubber tube after static pressure detection has the advantages that the situation that the water blowing time is prolonged blindly is effectively avoided, and the drying efficiency of the rubber tube is greatly improved.