65results about How to "Increase pickling speed" patented technology

The invention discloses a method for regeneration of a spent denitration catalyst, and relates to a composition for a cleaning solution and an application thereof, and an activity recovering method for a spent SCR catalyst. The invention is used for solving the technical problems in the prior art that a lost catalyst active component in a regeneration process cannot be selectively supplemented and an iron rust defect of a metal module framework cannot be effectively eliminated. The method comprises the following steps: one, dust cleaning; two, spraying; three, cleaning; four, re-cleaning; five, acidification; six, pre-drying; and seven, activity supplementing. Cleaning media of sodium hydroxide and potassium hydroxide can dissolve inactivated V2O5 and toxic element arsenic on the surface of the catalyst. While the method can selectively supplement the catalyst active component (TiO2), the iron rust removal rate of the metal module framework reaches 19% to 24%. The invention belongs to the field of spent denitration catalyst regeneration.

The invention relates to a production method for pickling steel with reduced acid and belongs to the technical field of metal rolling. The technical scheme is that: a FeO eutectoid reaction curve in a scale microstructure in the hot rolling process of target steel is formed; a rolling process is controlled, optimized and adjusted according to the FeO eutectoid reaction curve in the scale microstructure in the hot rolling process of the target steel; and the scale microstructure is changed, the generation of Fe2O3 which is difficult to pickle is reduced, the pickling speed is improved in the pickling process, and acid consumption of each ton of steel is reduced to pickle steel with acid. The invention has the advantages that: the scale is well controlled in the hot rolling process, and thesurface quality of a hot rolled strip coil and labor productivity are greatly improved; and the scale microstructure is changed, the generation of Fe2O3 which is difficult to pickle is reduced, the pickling speed is improved by 10 percent in the subsequent pickling process, and the acid consumption of each ton of steel is reduced by 7.5 percent. The pressure of excessive waste acid emission on the environment is greatly lightened, and the method has the advantages of energy conservation, emission reduction and great social benefit.

The invention discloses a production method for continuous pickling of hot rolled duplex stainless strip steel. The production method comprises the following steps: shot blasting and descaling after annealing; electrolytic pickling and pre-pickling with sulfuric acid; grinding and scrubbing; treatment in a sulfuric acid pickling bath; treatment in a mixed acid pickling bath; treatment in another mixed acid pickling bath, wherein the concentration of nitric acid in the bath is 100-150g/l, the concentration of hydrofluoric acid in the bath is 35-55g/l, the concentration of metal ions in the bath is 5-20g/l, the acid liquor temperature is 45-65 DEG C and the pickling speed is 10-25m/min. The production method has the beneficial effects that by adjusting the casting amount and rotating speed of a shot blasting machine, the pickling process, the acid liquor concentration, the acid liquor temperature and the acid liquor components, the strip steel pickling speed can be effectively increased, the yield can be increased and a good NO.1 surface can be obtained.

The invention discloses a production method for continuous pickling of hot rolled superaustenitic stainless strip steel. The production method comprises the following steps: strip steel shot blasting and descaling after annealing; electrolytic pickling pretreatment with sulfuric acid; grinding and scrubbing; treatment in a sulfuric acid pickling bath; treatment in a mixed acid pickling bath; treatment in another mixed acid pickling bath, wherein the concentration of nitric acid in the bath is 150-250g/l, the concentration of hydrofluoric acid in the bath is 50-70g/l, the concentration of metal ions in the bath is 5-20g/l, the acid liquor temperature is 50-65 DEG C and the pickling speed is 22-28m/min. The production method has the beneficial effects that by adjusting the casting amount and rotating speed of a shot blasting machine, the pickling process, the acid liquor concentration, the acid liquor temperature and the acid liquor components, the strip steel pickling speed can be effectively increased, the yield can be increased and a good NO.1 surface can be obtained.

The invention relates to an improved hot galvanizing method of an iron handicraft or furniture. The method comprises the following steps: (1) uncoiling and degreasing a workpiece; (2) removing dust; (3) washing; (4) assisting plating; (5) baking; (6) galvanizing by dipping; (7) settling; (8) passivating; (9) cooling. In the method, a degreasant is changed into acidity and is composed of a sulfuric acid solution, OP-10 and di-o-tolyl-thiourea. Thus, a washing procedure can be saved; a water resource and the degreasant can be saved; the workpiece does not generate an over-cleaning phenomenon; a pickling solution is composed of a hydrochloric acid solution, phosphoric acid, alkylphenol ethoxylates, lauryl sodium sulfate and ethylenediamine tetraacetic acid, so that the pickling speed is improved, formation of acid mist and use of a complexing agent can be restricted, reduction of cadmia in galvanizing zinc is facilitated, the malleability of a zinc coating on the surface of the work-piece is improved, proper temperature and event are adopted in the subsequent galvanizing by dipping, and the thickness and the stability of the zinc coating at the surface of the workpiece are ensured. Thus, the improved hot galvanizing method is a method which is simple and convenient for operation and good in galvanized effect.

The invention relates to an acid recovery and purification system for a pickling waste liquid, and belongs to the technical field of wastewater reuse of metal finishing. The system sequentially comprises a waste-acid sedimentation device, a filtration device and an ion exchange resin recovery device; the system further comprises a first storage tank arranged between the waste-acid sedimentation device and the filtration device, and a second storage tank arranged between the filtration device and the ion exchange resin recovery device. The purification system provided by the invention is used for recovery and purification of the pickling waste liquid in the metal finishing industry, and has the advantages of high purity of a cleaning acid, high-efficiency recovery, low energy consumption and less workload.

The invention specifically relates to a silicon steel pickling promoter and a preparation method thereof. According to a technical scheme in the invention, the silicon steel pickling promoter is prepared from 0.1 to 5.0 wt% of a corrosion inhibitor, 10.0 to 50.0 wt% of an inorganic salt reducing agent, 0.1 to 5.0 wt% of an emulsifier, 5.0 to 20.0 wt% of an organic metal ion chelating agent, 0.1 to 5.0 wt% of a defoaming agent, 0.1 to 5.0 wt% of a synergist and 20.0 to 80.0 wt% of water through uniform mixing at normal temperature with stirring. The silicon steel pickling promoter provided by the invention has the characteristics of convenience in usage, high pickling efficiency, low cost, environment friendliness, a good corrosion inhibition effect, etc.

The invention relates to a method for accelerating meat curing by alternating vacuum and pressurization, belonging to the technical field of food processing, and in particular relates to a curing method of meats of livestock and poultry. The method comprises the steps of soaking fresh meat into curing liquid, and curing by alternating vacuum and pressurization, wherein during curing, the vacuum degree is 0.02-0.1MPa, the pressure value is 0.05-0.25MPa, the time ratio of vacuum to pressure is (1-3): 1, and the total time of alternate curing is shorter than 8h. According to the method, curing is carried out by alternating vacuum and pressurization, so that the defects that the meat curing period is long, curing is not even, and the like can be overcome.

The invention discloses a prediction method of pickling time considering pulling-correcting and scale breaking effect. The method comprises following steps: step a. collecting test parameters; step b. establishing an influence coefficient model of pulling-correcting and scale breaking on pickling time; step c. calculating parameters of the influence coefficient model by means of the regression method; step d. establishing a pickling time calculating model considering the influence of pickling solution concentration, temperature and pulling-correcting and scale breaking; step e. calculating pickling time coefficients by means of the regression method; step f. calculating pickling time according to the pickling time calculating model; step g. obtaining a pickling time calculating model from optimal solutions; step h. calculating pickling time in consideration of condition influence. The method of the invention combines the device and technical characteristics of straightening machines of striped steel pickling production line; the calculation method and results of pickling time are more accurate compared with the prior art, and the method solves the problem of on-site production and improves pickling speed of stripped steel.

The invention discloses 1800 MPa-grade cold-rolled steel for hot stamping forming. The 1800 MPa-grade cold-rolled steel is composed of the following chemical components including, by weight, 0.25%-0.35% of C, 0.20%-0.40% of Si, 1.10%-1.45% of Mn, less than or equal to 0.020% of P, less than or equal to 0.012% of S, 0.030%-0.060% of Als, 0.25%-0.60% of Cr, 0.030%-0.060% of Ti, 0.0025%-0.0055% of Band the balance Fe and inevitable impurities. According to the process route, the production method comprises the steps of raw material steel strip hot rolling, primary bell-type furnace annealing, continuous flash butt welding, acid pickling, cold continuous rolling, secondary bell-type furnace annealing, leveling and finished product obtaining. After hot stamping forming, a 1800 MPa-grade cold-rolled steel strip for hot stamping forming has the yield strength of 1359-1369 MPa, the tensile strength of 1821-1846 MPa and the percentage elongation after fracture of 6.5%-6.0% , meets the use requirements of the 1800 MPa-grade steel strip for hot stamping forming, and has the characteristics of low cost and high efficiency.

The invention relates to an automatic pickling system, which comprises a heating water tank, a pickling tank, a washing tank, two pneumatic cylinders, a fixed shaft, a supporting shaft, a cleaning tank, two sets of transporters and a fan, wherein a pickling tank and a washing tank are arranged inside the heating water tank, the pickling tank is on the left of the washing tank, the fixed shaft is connected to piston rods of the two pneumatic cylinders, the pneumatic cylinders are at both ends of the fixed shaft, the supporting shaft is fixed on the bottom of the fixed shaft, the fixed shaft isperpendicularly connected to the supporting shaft, the cleaning tank is connected to the bottom of the supporting shaft, the two sets of transporters are fixed on the external sidewalls of the heatingwater tank, and the fan is mounted on the side part of the heating water tank. Not only is pickling speed increased, but also a pickled material can be washed with water and air-dried before being galvanized.

The invention relates to the technical field of metal material processing, in particular to a method for preventing corrosion of high-manganese hot-formed steel after acid pickling. The method comprises the following steps that a plate blank of the high-manganese hot-formed steel is placed in a heating furnace and is heated to 1180-1210 DEG C, and heat preservation at the temperature is carried out for 25-40 minutes; rough rolling is conducted on the heated plate blank, the plate blank enters a finishing mill, the inlet temperature of the finishing mill is 1000-1010 DEG C, and coiling and uncoiling are conducted after finish rolling; the uncoiled plate blank enters a withdrawal and straightening machine, the insertion depth of a bending roller of the withdrawal and straightening machine iscontrolled to be 5-15 mm, and a hot-rolled coil obtained after withdrawal and straightening and descaling enters an acid pickling stage; and the hot-rolled coil is rinsed after taken out, wherein thechloride ion content of rinsing water is less than or equal to 10 mg/L, drying is carried out after rinsing, oiling is carried out, and then coiling is carried out to complete the method for preventing corrosion. According to the method for preventing corrosion of the high-manganese hot-formed steel after acid pickling, by controlling the components of the high-manganese hot-formed steel, the keytemperatures and processes of rough rolling and finish rolling, controlling the rolling rhythm, controlling the withdrawal and straightening parameter and operation in other aspects, occurrence of corrosion of the high-manganese hot-formed steel after acid pickling can be effectively prevented, and the method is simple, high in applicability and remarkable in effect.

The invention provides an efficient steel acid pickling accelerant not containing metal elements. The steel acid pickling accelerant is composed of a reducing agent and a surface active agent. The steel acid pickling speed can be greatly increased or the acid pickling temperature can be reduced as long as a small number of accelerants are added, and therefore the purposes of improving productivity, reducing acid mist, saving energy and reducing emission are achieved.

The invention belongs to the technical field of stone impurity removal, and specifically discloses a pickling device for stones. The pickling device comprises a sand washing cylinder, an acid collecting tank and a motor; the acid collecting tank is communicated with the lower surface of the sand washing cylinder, and a valve is arranged at a connection part of the acid collecting tank and the sand washing cylinder; the sand washing cylinder is internally provided with an annular grid, and a sieving unit which comprises a filter layer, a separation layer and a support layer from top to bottom in sequence; a part, in the annular grid, of the filter layer is provided with mesh openings, a part, in the annular grid, of the support layer is provided with an opening; the separation layer is connected between the filter layer and the support layer in a sliding way, one end of the separation layer is connected with a spring which is fixed on the inner wall of the sand washing cylinder, and the other end of the separation layer is provided with a weighting block which is located on the outer wall of the sand washing cylinder; one side, near the spring, of the separation layer is provided with a through hole. After the pickling device is adopted, impurity removal and purification on the stones such as quartz sand can be realized, the quartz sand can be pickled with acids with different acid concentrations according to the quartz sand with different volumes, so that the degree of pickling can be effectively controlled and the pickling quality is ensured.

The invention discloses an acid pickling process for a high-temperature coiled material. The contents of the acid pickling process for the high-temperature coiled material comprises the following steps that 1) withdrawal and straightening scale breaking is conducted on strip steel in a withdrawal and straightening machine, and the withdrawal and tension is controlled to be that the tensile stressin the strip steel is controlled to be exceeded 0-20% of the yield limit of a material; the insertion depth of the withdrawal and straightening machine is 0.4 D + (3-10) mm, and D is the diameter of ascale breaking roller; and 2) the strip steel subjected to the scale breaking enters acid tanks to be subjected to acid pickling, and the strip steel sequentially enters three acid tanks, the mass concentrations of hydrochloric acid in the acid tanks are 4 +/-1%, 10 +/-2% and 12 +/-2% correspondingly, and the corresponding acid tank temperatures are set to be 85 +/-2 DEG C, 80 +/-3 DEG C and 75 +/-3 DEG C correspondingly, and the circulation amount of pickling solution in the acid tanks is not less than 230 m<3>/hour. According to the acid pickling process for the high-temperature coiled material, by controlling the withdrawal and straightening scale breaking parameters and the pickling process parameters, the pickling speed of the high-temperature coiled material can be greatly increased, the phenomenon of insufficient pickling of the strip steel is prevented, and meanwhile, the consumption of the hydrochloric acid in the pickling process can be greatly reduced.

The invention discloses an application process in the technical field of fastener hot galvanizing intelligent production. The application process comprises the following steps that spraying cleaning is conducted, specifically, a high-pressure pump is used for circularly spraying cleaning liquid to the surface of a fastener, and dust and the like on the surface of the fastener are flushed off; ultrasonic cleaning is conducted, specifically, the fastener reaches an ultrasonic cleaning station along with a crawler belt and is immersed in cleaning liquid, and an ultrasonic generator impacts the surface of the fastener through mechanical vibration with high ultrasonic cavitation seepage force and is combined with the decontamination effect of a cleaning agent to clean away oil stains on the surface of the fastener; slitting 1, high-pressure air is used for purging the surface of the fastener, so that liquid on the surface falls back into a groove, and the situation that the liquid is brought into the next procedure to pollute working liquid is avoided; and water washing 1, wind shearing 2, water washing 2, wind shearing 3 and acid pickling are conducted, and finally discharging is conducted. According to the application process, the oil removal effect is good, the oil removal speed is high, the subsequent acid time and the acid consumption are reduced, the subsequent waste acid cleanliness is high, resource utilization is facilitated, the subsequent acid pickling speed is increased, equipment integration is achieved, the occupied area is small, and the automation degree is high.

The invention discloses a nano additive used for a steel pipe pickling solution and a preparation method for the nano additive. The nano additive is chemically modified nano lanthanum borate emulsion or/and nano cerium borate emulsion. A chemical modification agent adopts oleic acid and a surfactant. The surfactant is selected from any one or more of alkylbenzene sulfonate, fatty alcohol-polyoxyethylene ether or alkylphenol ethoxylates. The pickling solution is prepared by the nano additive and hydrochloric acid. The nano additive accounts for 0.01-2.0 wt% of the pickling solution. Compared with a hydrochloric acid pickling solution which does not contain a nano additive, the hydrochloric acid pickling added with the chemically modified nano lanthanum borate emulsion or/and the nano cerium borate emulsion can significantly reduce acid mist, improve the pickling efficiency and save the pickling time. An oxide skin on the surface of a pickled steel pipe is thoroughly removed, and the surface is uniform.

The invention provides an environment-protecting nickel-iron-chromium electrothermal alloy pickling treatment device. The environment-protecting nickel-iron-chromium electrothermal alloy pickling treatment device comprises a pickling tank, wherein the bottom wall of the pickling tank is connected with a first motor, and the output end of the first motor is connected with a rotating shaft; the end,far away from the first motor, of the rotating shaft penetrates through the pickling tank and is connected with a first gear, the top of the first gear is connected with a filter screen cylinder, anda metal workpiece is placed in the filter screen cylinder; a rack ring is connected to the inner wall of the pickling tank, and a second gear is connected between the rack ring and the first gear ina meshed mode; and a conveying pipe is connected to the outer wall of the second gear, discharging holes which are evenly distributed are dug in the outer wall of the conveying pipe, and a rotating rod is rotationally connected into the second gear through a bearing. According to the environment-protecting nickel-iron-chromium electrothermal alloy pickling treatment device, hydrochloric acid is added into the pickling tank, so that the concentration of a pickling solution in the pickling tank is ensured to be sufficient, then the pickling effect and the pickling efficiency of the alloy workpiece are ensured, and the percent of pass of a finished product is ensured.