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286results about How to "Stable and reliable production" patented technology

Process for preparing potassium nitrate by double decomposition method

The invention provides a metathesis method for preparation of potassium nitrate. After raw potassium chloride, ammonium nitrate and craft water finish their preparation at a certain ratio, they are input into vacuum cooling crystallizer. Then potassium nitrate is separated by crystallization and grows up. The crystallized liquid thickens by the thickening apparatus and continuously separates potassium nitrate as aim products by centrifugal machine. After the separated mother liquid exchanges heat with the reacting liquid, it is input into natural circulation evaporator to concentrate, adopting backward feed and dual effect concentration with constant pressure in the first chamber and negative pressure in the second chamber. Through cooling crystallization, thickening by the thickening apparatus, the concentrated liquid continuously separates ammonium chloride as by-products. The gained secondary mother liquid returns to preparation groove. Repeating this cyclic process, we could sequentially get solid potassium nitrate and ammonium chloride.The invention has improved production stability and product quality a lot and reduced raw material consumption and energy consumption, with simple and serial flow process. The invention has realized the mass production.
Owner:EAST CHINA ENG SCI & TECH

High speed automatic tin-plating machine

The invention discloses a high speed automatic tin-plating machine which comprises an unreeling mechanism, a tin-plating mechanism, a driving and cleaning mechanism, a storage mechanism, a reeling mechanism and a control system sequentially arranged, wherein the unreeling mechanism comprises an unreeling frame, a paying off swing rod, an unreeling transitional wheel, an unreeling belt wheel, a tension adjusting wheel and an unreeling motor; the tin-plating mechanism comprises a tin-plating frame, an acidifying box, an acidifying transitional wheel frame, a solder machine, a pinch roller, a wind knife assembly and an air flue frame; the driving and cleaning mechanism comprises a cleaning frame, a cleaning agent groove, a cleaning transitional wheel bracket, a thickness measuring assembly and a traction assembly; the storage mechanism comprises a storage frame, a fixed wire storage wheel set, a mobile wire storage wheel set and a tension detection mechanism; the reeling mechanism comprises a reeling frame, a reeling guide rail bracket, a vertical wiring device and a horizontal wiring device. The high speed automatic tin-plating machine disclosed by the invention is novel and reasonable in design, ensures the quality and efficient production of tin-plating welding strips, is high in working reliability, better realizes continuous, efficient, high-quality and low-cost tin plating, and is convenient to popularize and use.
Owner:THE NORTHWEST MACHINE

Ti-TiN & Ti-MoS2/Ti double-cutting-surface coated cutting tool and preparation process thereof

The invention relates to a Ti-TiN & Ti-MoS2/Ti double-cutting-surface coated cutting tool and a preparation process thereof. The front surface of the cutting tool is an MoS2/Ti lubricating coating and a Ti front cutting tool surface transition layer is arranged between the MoS2/Ti lubricating coating and a cutting tool substrate. The rear surface of the cutting tool is a TiN coating with high hardness and a Ti rear cutting tool surface transition layer is arranged between the TiN coating with high hardness and the cutting tool substrate. The preparation process comprises the steps of pre-processing, ion cleaning, depositing the Ti transition layer on the front cutting tool surface, depositing the MoS2/Ti coating on the front cutting tool surface, sampling, refitting a furnace, ion cleaning, depositing the Ti transition layer on the rear cutting tool surface, depositing the TiN coating on the rear cutting tool surface and post-processing. Advantages of a Ti-TiN coated cutting tool withhigh hardness and a Ti-MoS2/Ti lubricating coated cutting tool are combined in the present invention of the double-cutting-surface coated cutting tool which has both high hardness and low friction coefficient, so that performance of the coated cutting tool is substantially improved. The preparation process enables the Ti-TiN & Ti-MoS2/Ti coated cutting tool to be produced conveniently. It is easyto grasp the process and the production process is stable and reliable.
Owner:SHANTUI CONSTR MASCH CO LTD

Method of leaching copper, cobalt and nickel from smelting alloy

A method of leaching copper, cobalt and nickel from smelting alloy comprises the following steps: the smelting alloy containing at least two of copper, cobalt and nickel and iron impurities is molten, and then the molten smelting alloy is atomized into alloy powder by high-pressure gas or high-pressure water; the atomized alloy powder is added into a stir aeration reaction device, a sulfuric acid solution is used as a leaching medium in the stir aeration reaction device, air or oxygen is uniformly brought from a stirring shaft system of the stir aeration reaction device, the brought gas is uniformly dispersed under the shear action of stirring blades in high-speed rotation at the bottom of the stirring shaft system, and under the effects of an oxidizing agent and a catalyst, the alloy powder is subjected to corrosion oxidizing leaching reaction in the stir aeration reaction device; after reaction is completed, most iron impurities enter a leaching residue, and solid-liquid separation is finally carried out to collect and obtain a leaching liquid containing at least two of copper, cobalt and nickel. The method of leaching copper, cobalt and nickel from the smelting alloy has the advantages that the process cost is low; the technology is convenient to control; the production is stable and reliable; the environment pollution is low and the like.
Owner:CHANGSHA RES INST OF MINING & METALLURGY

Nickel iron slag micropowder and preparation method thereof

The invention relates to nickel iron slag micropowder and a preparation method thereof. The method comprises the following steps: performing magnetic separation on nickel iron slag taken as a raw material and grinding the nickel iron slag so as to obtain the nickel iron slag micropowder with the specific surface area being 359.9m<2> / kg to 550m<2> / kg. The specific surface area of the nickel iron slag micropowder is uniformly in distribution; the nickel iron slag micropowder with the certain specific surface area has a good activity index, thereby conforming to the international S75-level standard. In addition, the water content, the ignition loss and the like of the nickel iron slag micropowder all conform to rules in 'Granulated Blast Furnace Slag Powder Used in Cement and Concrete' of GB / T18046-2008. The prepared nickel iron slag micropowder can be taken as a blending stock of the cement and the concrete. Meanwhile, after the nickel iron slag micropowder is prepared from the nickel iron slag, the purposes of recycling wastes and turning wastes into wealth are realized. Thus, pollutions to atmosphere, soil and water, which are caused by the nickel iron slag, are lightened, namely, the ecological environment is optimized; the high added-value is obtained while the cost is low. As a result, the significant economic and social benefits are achieved.
Owner:SHANDONG WEIYE NEW BUILDING MATERIAL

Fire extinguishing agent prepared from grapheme and superfine materials

The invention relates to a fire extinguishing agent prepared from grapheme and superfine materials. The fire extinguishing agent takes water as a carrier, and is prepared from 0.1-8.5 parts of modified grapheme, 0.8-5 parts of additive and surfactant, 8-35 parts of antifreeze agent, 2-15 parts of fire retardant, 1-9 parts of thickener, 0.1-0.5 part of preservative, and 27-88 parts of water. The fire extinguishing agent is pumped or driven with inert gas to be jetted for extinguishing a fire. A large amount of hydrophilic oxygen-containing functional groups are contained on the surface and the edge of the surface of modified grapheme, so that grapheme can be stably dispersed in a water solution, and the hydrophilic oxygen-containing functional groups can enable grapheme to be modified covalently and non-covalently; since grapheme is very large in specific surface area, very high in strength and high in thermal stability, grapheme can be combined with a solution in the fire extinguishing agent to form a superfine and ultra-thin liquid membrane and foam, which cover the fire; and grapheme is a nanomaterial with high lubricating property, and takes the effect of a drag reducer in the fire extinguishing agent. The fire extinguishing agent is high in fire extinguishing efficiency, is harmless to the human body, does not corrode devices, is energy-saving, environmental-friendly and safe.
Owner:胡泽军

Continuous punching mold of vehicle engine cabin

The invention discloses a continuous punching mold of a vehicle engine cabin. The mold comprises a guide traction lubrication structure, a leveling limiting fixed-length punching structure, a horizontal feeding structure, a hole position primary positioning punching and secondary horizontal positioning pull structure, a continuous punching waste dropping and feeding material detecting structure and a flat cutter discharge structure. A steel strip to be machined is sprayed with lubricant by itself, and is driven by a traction sub-mold to forwards move. Then, the steel strip enters the leveling limiting fixed-length punching structure to finish the striping fixed-width punching, and enters the horizontal feeding structure to perform the hole position primary positioning punching; the secondary horizontal positioning pull structure guarantees the continuous horizontal forward movement of materials; when the steel strip enters the continuous punching waste dropping, the product is basically molded; the steel strip is fed into the material detecting structure to detect the punching aperture and the striping fixed-length size; and finally, the flat cutter discharge structure performs the fixed-length cutting discharge. The six procedures of leveling, striping, feeding, punching, detection and discharge in the engine part machining process are integrated and finished by one set of mold, so that the production flow is shortened, the production efficiency is improved, the production cost is reduced, and the mold is suitable for continuous large-batch production.
Owner:HEFEI HAODONG PRECISION IND CO LTD

Integrated-type control system of roll steel heating furnace

The invention relates to an integrated-type control system of a roll steel heating furnace. The integrated-type control system of the roll steel heating furnace comprises a control computer system [101], an engineer control machine [102], an operator computer [103], a computer gateway [104], a monitoring network [105], a field bus interface [106], a field bus network [107], a field bus instrument and an auxiliary device [108]; and the integrated-type control system of the roll steel heating furnace is characterized in that the monitoring computer system also comprises a furnace condition diagnosing module, a billet temperature control module and a furnace temperature rising optimal control module, wherein the furnace temperature rising optimal control module is used for realizing the furnace condition diagnosing, the billet temperature control and the furnace temperature rising optimal control during the production process of the roll steel heating furnace, and a control method provided by the monitoring computer system is used for carrying out information fusion by integrating multiple modules, realizing advanced control strategy of the monitoring computer system, carrying out optimization and coordination control, diagnosing, forecasting and analyzing the furnace condition of the heating furnace and ensuring the safe production. According to the integrated-type control system of the roll steel heating furnace, provided by the invention, under a complex condition, the production process of the roll steel heating furnace can be effectively and integrally controlled, the production efficiency and the billet heating quality are increased, the energy consumption is reduced, the safe and stable operation of the heating furnace is ensured, and thus a high-quality, low-consumption and high-yield production target of the roll steel heating furnace and a safe, stable and balanced control standard are achieved.
Owner:WUHAN UNIV OF SCI & TECH

Process and special equipment for plating copper on special steel piece with deep/blind hole

The invention discloses a process for plating copper on a special steel piece with a deep/blind hole, namely render copper. The process comprises the following steps of: chemical deoiling, washing with hot water, electrolytic deoiling, washing with hot water, washing with cold water, acid washing, secondary washing with cold water, neutralizing, washing with cold water, plating copper without cyanide, secondary washing with cold water, plating tin, secondary washing with cold water, neutralizing, washing with hot water, passivating, secondary washing with hot water, washing with hot pure water, dehydrating with alcohol, removing the residual water, drying and inspecting, wherein electroplate liquid used in the step of plating copper without cyanide has the following formula: 400 to 600ml/L of BH-580 non-cyanide alkaline copper cylinder plating bath solution, 1 to 2ml/L of BH-580 non-cyanide alkaline copper brightening agent and 7.5 to 12g/L of metal copper; and the pH value is 9.2 to 9.8. The process has the advantages of good stability of a plating liquid, simple and convenient operation, good dispersibility and good covering capability; the formed plating layer has the advantages of fine and compact crystallization, good adhesive force, stable and reliable production; and the method can effectively protect environment and the physical and psychological health of operators.
Owner:CHANGAN AUTOMOBILE (GRP) CO LTD
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