73results about How to "Easy pickling" patented technology

High strength cold-strip steel whose tensile strength is over 880Mpa , its component is ( weight percentage): C:0.14-0.24%;Si:0.2-1.2%;Mn:1.5-2.5%;P:<0.02%; S:<0.02%;N:<=0.005%;Ti:0.03-0.1%;Nb:0-0.04%;B:0.002- 0.006%;Al:0.02-0.08%;the other is composed of Fe and other inevitable impurity. Its method is as following: Steel billet-> hot-rolling-> acid-washing-> cold rolling-> continuous annealing; its main manufacture technological parameter is as following: The anneal temperature is between750DEG C-850DEG C, heat preservation time is controlled to between 40s-150s; Air cooling speed is 30-60DEG C/s, cooling down to350-500DEG C; The hydrocooling temperature is below 200DEG C; The drawing-back temperature is 150-300DEG C, drawing-back time is 100-300s; the unknit rate is 0-0.8%.

The invention discloses a method for enriching precious metal by dissolving multi-metal alloy material through nitric acid. The method comprises the steps that the multi-metal alloy material is mixed with the nitric acid, placed in a titanium reaction kettle to be leached, heated to 85 DEG C-95 DEG C and kept for a period of time, when the multi-metal alloy material is concentrated to be in a sticky state, heating is stopped, water with the weight ratio being two to six times of that of the multi-metal alloy material is added at the same time so as to reduce the acidity, and the pH value of an end point is increased by one to three times or so, so that filtrating and separating are conveniently conducted between main metal lead, nickel, copper and the like and the precious metal; after filtering and washing are conducted, leaching liquid and leaching residue are obtained, the leaching liquid contains the lead, the copper and the like and serves as a raw material for recycling the lead and the copper, and the leaching residue contains bismuth, antimony, gold, silver, platinum, palladium and the like; and the antimony is removed through pressurizing and alkali leaching, alkali leaching liquid and alkali leaching residue are obtained after filtering and washing are conducted, and the precious metal enters the alkali leaching residue and effectively enriched. The method for enriching the precious metal by dissolving the multi-metal alloy material through the nitric acid is simple in process, easy to operate, mature in involved production equipment, easy to industrialize, environmentally friendly, low in production cost, high in precious metal enrichment ratio and good in industrialized application prospect.

The invention relates to the technical field of metal passivation, and specifically relates to a stainless steel pickling and passivation solution as well as a preparation method and a use method thereof. The stainless steel pickling and passivation solution comprises the following raw materials in percentage by weight: 14-22% of nitric acid, 3-7% of hydrofluoric acid, 0.6-1.0% of nonionic surfactant, 0.41-0.65% of corrosion inhibitor, 0.05-0.15% of oxidant, 0.03-0.07% of ionic surfactant and the balance water. The stainless steel pickling and passivation solution disclosed by the invention is capable of carrying out pickling and passivation on a stainless steel product under a normal-temperature condition, safe and environment-friendly, high in stability, good in pickling and passivation effects, and low in cost.

The invention relates to an inner wall washer of a steel tube. The washer comprises a track, a rail car, an iron-brush motor, a trolley motor, a steel tube bracket and an iron brush, wherein the rail car runs on the track, the trolley motor is fixed on the rail car, the wheels of the rail car are driven to rotate by the rail car, the iron-brush motor is fixed at the rear part of the rail car, the end part of the output shaft of the iron-brush motor is coaxially provided with the iron brush, a water spraying pipe is mounted at the side of the output shaft and the opening of the water spraying pipe faces to the diametric plane of the iron brush. The invention has the advantages of simple overall structure, scientific and reasonable design, high washing efficiency and perfect washing effect, and can be used for effectively cleaning the graphite adhered to the surface of the inner wall of the steel tube after the process of thermal diffusion so as to reduce the adherence of graphite, which is beneficial to acid washing of steel tube, thereby improving the subsequent processing quality of steel tube.

The invention provides a low-alkali activated preparation method and application of pitch-based activated carbon. The method comprises the steps that pitch is taken as the raw materials and sequentially processed through coking, mixing with solid alkali, pre-activating, activating, cleaning and the like, and the pitch-based activated carbon is prepared. According to the preparation method, green coke and the alkali are mixed evenly through pre-activating treatment, and on one hand, contact of the green coke and the alkali is enlarged, so that the preparation method has the advantages that at least three eighths of the alkali using amount is saved compared with the prior art, the service life of an activating oven is prolonged, the discharge quantity and treatment difficulty of cleaning effluent are reduced, and the advantages of energy conservation and environment protection are achieved; on the other hand, the quality homogeneity of the activated carbon can be improved, and property difference among the products of different batches can be avoided; in addition, activating treatment is performed on pre-activating products by quickly increasing the temperature, corrosion of the strong alkali on equipment at high temperature for a long time is reduced, the number of functional groups on the surface of the activated carbon can be reasonable, and improvement of the electric conductivity of the products is facilitated.

The present invention discloses a method for collecting noble metal from polymetallic alloy material. The method is as below: mixing a polymetallic alloy material with ammonium salt, placing the mixture in an autoclave for pressure leaching of primary metals copper and nickel, filtering and washing after leaching, respectively acquiring a leaching solution and ammonia leaching residue, and using the leaching solution as copper and nickel recycling raw material; adding nitric acid into ammonia leaching residue, leaching in a closed titanium reactor for some time, and heating to concentrate and evaporate residual nitrate; when the reaction products reach a viscous state, stopping heating, while adding water for dilution, filtering and washing to respectively obtain a leaching solution and acid leaching residue containing antimony, gold, platinum and palladium; using the leaching solution containing lead as a raw material for recycling lead; removing antimony by pressure alkali leaching, filtering and washing to obtain alkaline leaching solution and alkaline leaching slag; and immersing precious metals into the slag, so as to effectively enrich precious metals. The method has the advantages of simple operation procedure, mature equipment, environment-friendliness, low production cost, high precious metal enrichment ratio, and good prospects for industrial application.

The invention discloses a method for removing rust on the outer wall of a petroleum drill rod. The method comprises the following steps: 1, scraping away dirt on the outer wall of the drill rod with a cleaning device; 2, spraying a diluted hydrochloric acid solution to the outer wall of the drill rod with the dirt scraped away; 3, conducting washing on the outer wall of the drill rod which is treated through the diluted hydrochloric acid solution; 4, wiping the outer wall of the drill rod with cleaning cloth. By means of the rust removal method, manual operation is not needed after the dirt-scraping step is completed, friction between a cleaning plate and the outer wall of the drill rod is achieved under motor drive, and furthermore the dirt on the outer wall of the drill rod can be removed, so that the dirt and the rust on the outer wall of the drill rod are loosened, subsequent pickling and washing are facilitated, operation is simple and convenient, efficiency of cleaning the outer wall of the drill rod is greatly improved, the rust and other alkaline dirt are dissolved through the diluted hydrochloric acid solution, finally, the dirt is removed through washing, operation is convenient, and the dirt is cleared away thoroughly.

The invention relates to the technical field of pickling and derusting devices, in particular to a novel steel pipe pickling and derusting device, which includes a casing, a conduit is provided on the top wall of the casing, a nozzle is provided on the conduit, and a nozzle is provided on the casing. Clamping mechanisms are provided on both sides of the bottom wall, the clamping mechanism includes a support frame, a bearing seat is vertically arranged on the support frame, a second rotating shaft is rollingly connected in the bearing seat, and the second rotating shaft is connected to There is a fixed plate, the two ends of the fixed plate are provided with splints, the splint is provided with bolts, the bolts pass through the splint and the second rotating shaft, the lower end of the housing is provided with a motor support plate, and the motor supports A motor is arranged on the board, the output shaft of the motor is fixedly connected with a first rotating shaft, the first rotating shaft is fixedly connected with the second rotating shaft, transparent glass is hinged on the housing, and an outlet is provided at the lower end of the housing. The acid port is provided with supporting legs on both sides of the lower end of the shell. The invention has the characteristics of thorough rust removal.

The invention discloses a method for cleaning membrane pollution in the process of electrodialysis treatment on paper-making reconstituted tobacco extract liquor, which is used for cleaning an electrodialysis system generating membrane pollution through the cleaning processes of primary water washing, reversed-pole alkaline washing, secondary water washing, reversed-pole acid washing and tertiarywater washing in sequence. According to the cleaning method, membrane pollution in the electrodialysis process can be effectively solved, the desalination rate of an electrodialysis system is remarkably recovered, and reliable operation guarantee is provided for the process of treating the paper-making process reconstituted tobacco extracting solution through electrodialysis.

The invention provides a making method of flavored stewed duck in soy sauce and belongs to the field of processing of meat products.The making method comprises the following steps: (1), preparing materials, (2), pickling, (3), tumbling, (4), soaking, (5), cooking, and (6), air drying; wherein the preparation of materials includes: material preparation, marinade preparation, and pickling juice preparation.Burdening of the marinade and pickling juice is simplified and ratio of the ingredients is optimized so that salt level is moderate, the process is simple and applicable and meat is delicate and tasty.

The invention belongs to the technical field of heat exchanger cleaning, and particularly relates to an optimization method of a heat exchanger pickling process. Firstly, according to scale layer components of a heat exchanger, comprehensive screening is conducted through a superposition graph of data statistical analysis software, and proper cleaning acid is found; under the effective concentration of the corrosion inhibitor, the screened standard test pieces with the cleaning acid and the heat exchanger shell made of the same material are used for carrying out a corrosion experiment, two sets of comparison data are obtained, the corrosion weight loss of the standard test pieces in acid with different concentrations is measured without adding the corrosion inhibitor in one set, and the weight loss of the standard test pieces is measured after the corrosion inhibitor is added in the other set; establishing a predicted value-actual value model of the corrosion weight reduction of the test piece, and finding out the optimal cleaning acid concentration by using a prediction descriptor of data software, and in the pickling process, the corrosion amount of the heat exchanger shell is minimum, and optimization of the heat exchanger pickling process is achieved. By the method, the problem of serious corrosion of the shell during pickling of the heat exchanger can be solved, and heat exchange efficiency of the heat exchanger is improved after pickling.

The invention relates to the technical field of acid pickling devices, and discloses an acid pickling device for a cotton knitted fabric. The device includes an acid pickling box, the top of the acidpickling box opens, the bottom in the acid pickling box is provided with a T-shaped slide groove, the inside of the sliding groove is slidably connected with a slider matched with the sliding groove,the top of the slider extends to the outside of the sliding groove and is fixedly connected with a material bearing box, the outer side wall of the acid pickling box is fixedly connected with a transmission box, one end of the transmission box opens, the outer side wall of the acid pickling box is provided with a square hole communicated with the transmission box, the inside of the square hole isslidably connected with a rack, the bottom in the square hole is flushed with the bottom in the transmission box, one end of the rack extends to the inside of the acid pickling box and is fixedly connected with a push block, the bottom of the push block is fixedly connected with the outer side wall of the material bearing box, the other end of the rack extends to the inside of the transmission box, and the inner side wall of the transmission box is fixedly connected with a first motor. The acid pickling device for the cotton knitted fabric can make the cotton knitted fabric uniformly pickled and make acid pickling liquid uniformly heated.

The invention relates to the technical field of stainless steel part machining, and discloses a stainless steel part pickling device, which comprises an injection cylinder; the inner walls of the left and right sides of the injection cylinder are sleeved with side frames; the front and rear inner walls of the side frames are fixedly connected with elastic telescopic pads; the corresponding ends of the front and rear corresponding elastic telescopic pads are fixedly connected with sliding plates; the top face of the injection cylinder is fixedly connected and communicated with three liquid conveying pipes; and the liquid conveying pipes on the left side and the right side correspond to two liquid conveying grooves correspondingly. Through arrangement of a lantern ring, the lantern ring can automatically deform into two states during acid pickling and cleaning, a stainless steel part is wrapped during acid pickling, the acid pickling range is widened, the speed that an acid solution is separated from the stainless steel part is reduced through the wrapping effect of the lantern ring, so that the advantage of saving resources is achieved, the lantern ring is unfolded on the stainless steel part during cleaning, the spraying effect is formed during cleaning, the effect and strength that water flow strikes the stainless steel part are improved through the height difference, and the cleaning effect is improved.

The invention relates to non-oriented electrical steel and a preparation method thereof. The non-oriented electrical steel comprises the following chemical components of, in percentage by mass, less than or equal to 0.0030% of C, 0.90-1.00% of Si, 0.2-0.40% of Mn, 0.015-0.40% of P, less than or equal to 0.004% of S, 0.025-0.035% of Als, less than or equal to 0.001% of Ti and the balance Fe and inevitable impurities. The preparation method comprises the following steps of converter control; ladle furnace refining, and specifically, the temperature of molten steel is increased to 1620 DEG C-1650DEG C, and then high-aluminum slag is added; and alloying, and specifically, the temperature of tundish molten steel in the continuous casting procedure is 1532 DEG C-1542 DEG C, wherein the time ofa continuous casting billet in a heating furnace is more than or equal to 120 minutes, the initial rolling temperature is 1060 DEG C-1100 DEG C, the finish rolling temperature is 980 DEG C-1020 DEG C,the final rolling temperature is 840 DEG C-880 DEG C, and the coiling temperature is 680 DEG C-720 DEG C. Through component and production process optimization, the non-oriented electrical steel withexcellent performance can be developed.

The invention discloses a preparation process for preparing regular spherical calcium carbonate through acalcium chloride and ammonia water solution carbonization method. The preparation process comprises the following steps: adding an organic solvent into a calcium chloride and ammonia water solution to serve as a carbon dioxide dissolving agent and a calcium carbonate crystal form stabilizer, adding an inorganic morphology control agent into the calcium chloride and ammonia water solution, and fully mixing; and introducing carbon dioxide for carbonization until the pH value is lower than 8 to obtain calcium carbonate slurry, and dehydrating, washing and drying the calcium carbonate slurry to obtain the spherical calcium carbonate. The obtained spherical calcium carbonate does not need surface treatment, is regular in sphere, good in dispersity, simple in preparation process, short in carbonization time and low in production cost, and the particle size of the prepared spherical calcium carbonate can be adjusted and controlled within the range of 0.1-5 micron.

The invention relates to the field of cold-rolled sheet manufacturing and pickling equipment, in particular to a cold-rolled sheet manufacturing device which comprises a device body. A plurality of extrusion pushing mechanisms are distributed on the inner side of the device body, and each extrusion pushing mechanism comprises an upper pressing roller and a lower pressing roller which are vertically, correspondingly and rotationally installed on the inner side of the device body. The inner side of the upper pressing roller and the inner side of the lower pressing roller are each provided with aplurality of flow guide channels distributed in an annular array mode, each flow guide channel is in a spiral shape with the screw pitch larger than that of the upper pressing roller, and the two ends of each flow guide channel penetrate through the outer surfaces of the two sides of the upper pressing roller or the lower pressing roller. Each extrusion pushing mechanism further comprises a fixing frame with the two ends fixedly connected to the inner walls of the two sides of the device body, the fixing frame is located in front of the upper pressing roller, and a sliding opening is formed in the upper end face of the fixing frame. The device is beneficial to flowing of the whole pickling solution in the pickling process, flowing of the pickling solution near the upper surface of the plate, cleaning of the surface of the plate and long-term use.

The invention discloses a method for preparing baked duck eggs with lentinus edodes five-spice composite flavor. The method is as follows: firstly treating duck eggs with an acetic acid solution, andremoving the outer film on the surface of the duck egg shell so as to reduce the immersion resistance of water and salt and to make the duck eggs easier to pickle; adopting ultrasonic wave during thefirst pickling to promote salt Infiltration, to utilize the cavitation effect peculiar to ultrasonic oscillation, to reduce the mutual aggregation of egg white protein particles, to reduce the viscosity of egg white and to enhance the penetration of salt and flavor substances; then drying and powdering waste lentinus edodes pedicle, mixing the pedicle powder with spices such as chilies and star anise to obtain a spicy lentinus edodes compound pickling material, and pot-stewing the cooked duck eggs to obtain duck eggs with lentinus edodes five-spice composite flavor; and finally, conducting segmented baking to obtain the baked duck eggs which have a caramel color in appearance and are smooth and bright, slightly viscous, complete in shell and tough in structure. The baked duck eggs preparedby the method have fresh saltiness, pot-stewing fragrance and burnt fragrance all put into one, and are crispy outside and tender inside, rich in fragrance, rich in nutrients and convenient to carryat the same time.

The invention relates to a sample holder, and particularly relates to a rust-removing sample holder. The rust-removing sample holder comprises two door-shaped frames and a cross beam which is arranged between top borders of the two door-shaped frames; sample baskets are arranged at the inner sides of the door-shaped frames; a plurality of upper blocking slots are arranged in two side borders of each sample basket in parallel, and lower blocking slots corresponding to the plurality of upper blocking slots one by one are arranged at the bottom of each sample basket, so that samples can be inserted into the corresponding upper blocking slots and the corresponding lower blocking slots. The rust-removing sample holder can be used for conveniently achieving processes of putting the samples into an acid slot and taking the samples out of the acid slot. Meanwhile, batch pickling of corroded samples can be realized, and the working efficiency is improved. In addition, the blocking slots are arranged in the sample baskets, so that the samples can be conveniently inserted into the blocking slots, and thus contact among the samples is avoided and quicker and better pickling is achieved.