167results about How to "Restore fast" patented technology

A method, system, computer system and computer program product to maintain consistency between mirrored copies of data. A first data change map identifies regions that are about to be updated. If a system failure occurs during the update, the first data change map identifies regions that were being changed so that only those regions can be synchronized to restore consistency between the mirrored copies of data. A second data change map tracks changes made to data after a snapshot of the mirrored data is taken. This second data change map enables the mirrored copies of data to be synchronized without copying all data from one mirrored copy to another. The first and second data change maps are updated in parallel to reduce processing time and overhead. This parallel processing enables fast restoration and synchronization of mirrored copies of data, while having minimal effect on performance of applications using the data.

Disclosed are devices for urine voiding postponement, and methods for treating conditions such as central diabetes insipidus, enuresis, nocturia, urinary frequency or incontinence. The devices deliver a desmopressin flux through the skin of a patient in a low dose amount just necessary to achieve a desired anti-diuretic effect without undesirable side effects such as hyponatremia. The devices are designed to permit a state of normal urinary production to return quickly after the desmopressin flux is terminated.

The invention discloses a recycling process of iron-containing zinc powder generated in an iron and steel process. The process comprises the following steps: mixing dried iron-containing zinc powder with a binder, and pelletizing by a pelletizer to obtain green balls; feeding the green balls into a shaft furnace and heating to 1100-1300 DEG C; reducing iron in the shaft furnace to sponge iron; converting reduced zinc at high temperature into zinc steam which is discharged out of the shaft furnace with coal gas and enters into a two-stage dedustor; and feeding dedusting mud obtained from the dedustor into a settling pond, and filtering, settling, thickening and drying to obtain zinc powder. The iron-containing zinc powder mainly comprises blast furnace gas ash, gas mud, dedusting ash, converter steelmaking dust and continuous casting steel rolling scrap iron generated in the iron and steel production. By adopting a treatment mode of the shaft furnace, the problem such as large rotary kiln equipment, low utilization ratio of in-kiln volume and high energy consumption is solved. Coal base is directly reduced at a high speed, and meanwhile, zinc in dust is further recovered.

The invention discloses a vanadium-nitrogen microalloy additive and a preparation method thereof. The preparation method comprises the following steps of 1, grinding a vanadium compound by a flour mill, 2, mixing a composite reducing agent and the grinded vanadium compound, adding a density enhancer, a binder and water into the mixture, and carrying out uniform mixing, 3, molding the mixture obtained by the step 1 by pressing, carrying out drying in air in a ordinary state, adding a curing agent into the molded mixture for a curing reaction, and carrying out a drying, reduction, carbonization, nitridation, sintering and cooling integrative continuous sintering process by a full-automatic one-step nitrogen atmosphere-protected double-push plate kiln to obtain the vanadium-nitrogen microalloy additive. The preparation method adopts a composite graphite raw material, improves a reduction rate and a product output, adopts the full-automatic one-step nitrogen atmosphere-protected double-push plate kiln, has simple processes, greatly improves production efficiency, greatly reduces a production cost and can produce the vanadium-nitrogen microalloy additive having good market competitiveness.

The invention relates to a pure cotton fabric reduced dye dyeing method which comprises the following steps: (1) textile preparation; (2) textile pretreatment; (3) preparation of reduced dye leuco body solution; (4) dip dyeing of reduced dye; (5) soap boiling and (6) after-finishing. The reduced dye leuco body solution is prepared by the following raw materials: 1-10g/L thiourea dioxide, 2-5g/L of iso-tridecanol polyoxyethylene ether, 1-2g/L of glucose, 2-5g/L of sodium silicate, and 1-2g/L of sodium sulfide. The K/S value of the dyed textile is obviously improved.

The invention discloses a method for determining phosphorus in silicon-manganese alloy, which comprises the steps of: dissolving a test sample by using nitric acid and hydrofluoric acid and adding perchloric acid to convert phosphorus in the test sample into orthophosphoric acid to obtain fist mixed solution; adding sodium sulfite into the first mixed solution to reduce manganese in the silicon-manganese alloy to obtain second mixed solution; and adding bismuth nitrate solution, ammonium molybdate solution, potassium sodium tartrate solution, sodium fluoride and stannous chloride into the second mixed solution, wherein ammonium molybdate can convert the orthophosphoric acid in the first mixed solution into phosphorus-molybdenum heteropoly acid, using stannous chloride to reduce the formed phosphorus-molybdenum heteropoly acid into blue phosphomolybdenum blue and finally using a spectrophotometric method to determine the content of the phosphorus. Compared with the prior art, by using the stannous chloride as the reducing agent, since the stannous chloride has the characteristics of high reducing speed, good reducing effect and the like, the analysis time of the determination method is shorter, the accuracy and the stability of the determination result are improved and the method is suitable for field mass production analysis.

The invention belongs to the water processing technology application field, relates to a method for removing nitrate nitrogen in water, and especially relates to a method for the zero-valent metal and carbon combination internal electrolysis catalysis reduction of a pollutant nitrate nitrogen in water. A technological principle of the method is characterized in that the reductibility of a zero-valent metal elementary substance and the internal electrolysis effect of the zero-valent metal elementary substance and conductive substances comprising active carbon and the like are utilized to accelerate the transfer of electrons in a solid-liquid phase interface, so nitrate nitrogen is rapidly reduced and removed, and the zero-valent metal can prolong the service life because of the internal electrolysis effect, thereby the reaction efficiency is improved. The method is characterized in that the granular or powdery zero-valent metal and a carbon material are directly added to or are mixed and then added to water containing nitrate nitrogen, stirring is carried out in a certain strength under reacting, and nitrate is directly reduced on the surface of the metal, and is reducibly degraded under the action of nascent state hydrogen [H] generated by an electrode reaction in the internal electrolysis process. The method has the advantages of simple operation, convenient management, less secondary pollution and high reaction time and space efficiency.

The invention discloses an industrial production method of separating valuable elements from composite paragentic mineral of aluminum-vanadium-titanium-iron-silicon for cyclic utilization. The method comprises the following steps: employing the technique of gradient magnetic separation to separate aluminum-silicon-iron products, vanadium-titanium-iron products and sulfur concentrate from composite paragentic mineral of aluminum-vanadium-titanium-iron-silicon; carrying out flash suspension smelting on the aluminum-silicon-iron products to obtain ferrosilicon alloy and aluminum slag which is used as a raw material for production of alundum; employing the technique of rectilinearly movable bed prereduction-shaft furnace smelting to prepare the vanadium-titanium-iron products into vanadium iron intermetallic compounds and titanium slag. Smelting separation and flash suspension smelting and rectilinearly movable bed prereduction-shaft furnace smelting are combined in the method provided inthe invention, which enables the recovery rate of raw ores to be enhanced.

The invention discloses a method for on-scale continuous production of a three-dimensional graphene membrane and application, belonging to the field of functional materials. The method comprises the following steps: 1, preparing a graphene oxide solution; 2, stirring and concentrating; 3, soaking a polytetrafluoroethylene bath into methanol; 4, filling the concentrated graphene oxide solution into the polytetrafluoroethylene bath, thereby obtaining graphene oxide strips; 5, leading out the graphene oxide strips from the methanol solution, firstly drying, and further performing reduction expansion, thereby obtaining the three-dimensional graphene membrane; and 6, collecting the three-dimensional graphene membrane, and coiling. The graphene oxide solution and functional nanoparticles are mixed, and the functional three-dimensional graphene membrane can be prepared by performing the above preparation steps. The method is simple in preparation process, environment-friendly, low in cost and applicable to on-scale production, and the three-dimensional graphene membrane prepared by using the method is three-dimensional and porous and has the characteristics of light mass, large specific surface area and good flexibility.

The invention discloses application of Stenotrophomonas rhizophila DSM14405 in reduction of hexavalent chromium. The Stenotrophomonas rhizophila DSM14405 survives in an alkaline environment for reducing the hexavalent chromium to trivalent chromium, and the trivalent chromium is bonded with hydroxide to produce a chromium hydroxide precipitate. The Stenotrophomonas rhizophila DSM14405 has a fasterreduction rate of the hexavalent chromium, the reduction rate of the hexavalent chromium of 50 mg/L is up to 100% within 32 h, and the concentration tolerance to the hexavalent chromium is high. Whenthe concentration of the hexavalent chromium reaches 200 mg/L, thallus can also grow, and the reduction rate reaches 47.6% within 48 hours.

The invention discloses an iron ore rotary kiln coal-based hydrogen metallurgy process and a device thereof. The process comprises the steps of material pelletizing, pellet drying and preheating, feeding materials into a kiln, material hydrogen metallurgy roasting, material melting-separating and cooling to obtain a product. According to the process, iron ore reduction takes H2 which is easy to obtain as the main material, and the hot-state intersection of the coal sufficient pyrolysis and iron oxide reduction process is realized; the reaction temperature point of hydrogen metallurgy is low, under the same combustion space temperature, more heat is introduced into a material layer, so that the reduction speed of pellets is accelerated, and the energy consumption of the process is low; theproductivity is greatly improved on the premise of the same heat transfer amount, the reduction speed is high, the productivity is high, and the intrinsic energy conservation, the intrinsic emission reduction and the intrinsic safety are effectively realized.

The invention belongs to the field of metallurgy, and in particular relates to a method for smelting magnesium through vacuum thermal reduction of precast pellets. The method comprises the steps of: uniformly mixing dolomite, a reducing agent and fluorite by mass, and then adding a binding agent; preparing raw pellets with diameters of 5-20mm by using a disk pelleting machine; calcining the raw pellets under a nitrogen or argon protection atmosphere to obtain calcined cured pellets; and carrying out vacuum thermal reduction for 0.5-2 hours on the calcined cured pellets at a temperature of 1150 DEG C under the vacuum degree of 10 Pa to obtain the magnesium. The method has the advantages of high raw material utilization rate, high reduction rate, short reduction period, low energy consumption and the like; and compared with the traditional ferrosilicon process for smelting the magnesium, the method realizes the technical upgrading of the ferrosilicon process for smelting.

The invention discloses a reducing roasting method for powdered iron ores in a tunnel kiln, which is designed for solving the problems of low heat transfer efficiency, long reducing time, non-uniform material reduction quality, and the like when powdered iron ores are subjected to reducing roasting in a tunnel kiln. According to the invention, by reasonably selecting the particle size range and distribution of iron ores, iron ores with different particle sizes and reducing coal are mixed and distributed in layers, and then the obtained object is subjected to reducing roasting, so that the iron ores with different particle sizes achieve a same roasting effect, thereby increasing the metal recovery rate of roasted iron ores, improving the quality of roasting, shortening the roasting time, reducing the roasting temperature, and lowering the production cost.

The invention provides a cobalt nitride compound. The chemical formula of cobalt nitride is CoN1.2. The invention also provides a preparation method of the cobalt nitride compound, wherein the average grain size of a reaction raw material namely cobalt acetate is 300 to 500 nanometers, and the cobalt acetate is sintered at a high temperature in the presence of a nitrogen source atmosphere to obtain the cobalt nitride compound. The invention also provides a methanol fuel cell catalyst and a preparation method thereof, wherein the catalyst comprises the cobalt nitride compound and a carrier for loading the cobalt nitride compound. The preparation method of the methanol fuel cell catalyst comprises the following steps of: performing ball milling on the reaction raw material cobalt acetate and the carrier for loading the cobalt nitride compound to ensure that the average grain size is 300 to 500 nanometers; and performing high temperature sintering in the presence of the nitrogen source atmosphere to obtain the catalyst.

The invention discloses a ferrous oxide-based ammonia synthesis catalyst. The ferrous oxide is taken as a main phase component, and potassium oxide, calcium oxide, aluminum oxide, magnesium oxide and other metal oxides are used as auxiliary catalysts. The ferrous oxide-based ammonia synthesis catalyst is prepared by a melting method. The catalyst has high activity to catalyze nitrogen and hydrogenate to synthesize ammonia, easy to reduce, and great in heat resistance and antitoxic and has mechanical performances. The catalyst is suitable to be used in various sizes of ammonia synthesizing devices, and particularly suitable for a low-pressure and low-energy consumption ammonia synthesizing technique; and obvious energy saving, consumption reduction, efficiency increasing, cost saving and economic benefits are achieved.

The invention relates to the technical field of metallurgical and mineral engineering and discloses a high-alkalinity composite metallized pellet for a converter and a production process thereof. The pellet comprises an inner core and a shell wrapping outside the inner core, wherein the inner core is prepared through mixing coal powder, limestone and cement according to the mass ratio of 100: (300-550): (4-7), the shell is prepared through mixing iron concentrate and bentonite according to the mass ratio of (1,500-1,800): (30-54), the granularity of the inner core is 20-25mm, and the thickness of the shell is 5-10mm; the outside of the shell is further covered with a layer of reducing agent. The production process comprises the steps of preparing the inner core, wrapping the shell to form the composite metallized pellet, wrapping the external wall of the composite metallized pellet with a reducing layer, distributing and drying the composite metallized pellet, carrying out reduction roasting on the composite metallized pellet, cooling and separating the high-temperature-reduction composite metallized pellet, and the like. According to the high-alkalinity composite metallized pellet and the production process thereof, through proportionally adding the limestone and the coal powder into the inner core, the internal reducing atmosphere of the pellet is strengthened, the reduction rate is increased, and the energy consumption is lowered.

Belonging to the technical field of metallurgy, the invention relates to a method for preventing directly reduced metallic pellets from bonding. The method comprises the steps of: (1) mixing anthracite carbon powder, lime powder, clay and bentonite uniformly so as to prepare peritoneal powder; (2) making a material to be reduced into mineral powder pellets; (3) placing the peritoneal powder into the pelletizing disc of a pelletizer, then putting the mineral powder pellets to be reduced on the peritoneal powder in the pelletizing disc, and initiating the pelletizer so as to prepare composite pellets; (4) subjecting the composite pellets and a pulverized coal reducing agent to a reduction reaction at a temperature of 1180-1220DEG C for 3-4h, thus obtaining metallic iron pellets. The method of the invention solves the bonding problem of directly reduced metallic pellets, and is especially suitable for producing high density metallic pellets, and also especially suitable for production of metallic pellets with high grade iron ore powder.