33results about How to "Uniform passivation" patented technology

The invention discloses a gas-phase passivation system for a petrochemical device. The gas-phase passivation system comprises a gas-phase passivation device, a tail gas treatment device and a data analysis device, wherein the tail gas treatment device is connected with the gas-phase passivation device and is used for treating harmful gases generated in a passivation process; the tail gas treatment device further comprises a lye tank in which 10 percent sodium hydroxide solution is accommodated, a tail gas valve and an exhausting valve; the data analysis device is connected with the gas-phase passivation device and is used for detecting data of combustible gases before gas-phase passivation and linearly detecting the concentration of sulfur dioxide (SO2) generated by passivation in a gas-phase passivation process; and the data analysis device further comprises a gas drying apparatus, a gas chromatograph, a metering machine, an air inlet monitoring valve and an air outlet monitoring valve. By the passivation system, waste gases are easy to treat, and the waste gases generated by gas-phase passivation can meet the discharge standard after being treated simply.

The present invention provides a tinplate passivation solution and a passivation process. The passivation solution provided by the present invention has the following components in terms of mass concentration: 30-40g / L of fluorotitanate ions, 30-40g / L of fluorozirconate ions L, permanganate ion 10‑20g / L, hydrofluoric acid 2‑3ml / L, phosphate 5‑15g / L, organosilane 5‑8g / L, and the rest is water.

The invention relates to a ferrous sulfide gas phase passivation method, which mainly solves the problems of high passivation cost, uneven passivation, long passivation time, and complicated operation in the prior art. The ferrous sulfide gas phase passivation method involved in the invention comprises the steps of: (1) conveying a ferrous sulfide suspension into a passivation tower, discharging the fluid from the passivation tower, and removing water from ferrous sulfide; (2) in a water vapor environment, introducing oxygen-enriched air into the passivation tower and passivating ferrous sulfide; (3) dividing the gas discharged from the passivation tower into at least two ways, making one way of the discharged gas enter sulfur dioxide and hydrogen sulfide content detection equipment after condensation and drying, and making the other way of the discharged gas enter an alkali liquor absorption pot; and (4) analyzing the ferrous sulfide content before and after passivation, the concentration of sulfate ions in the passivated condensate, and the content of sulfur dioxide and hydrogen sulfide in tail gas. The technical scheme well solves the problems and can be used in ferrous sulfide gas phase passivation.

The invention discloses a gas phase deactivation method for a petrochemical device. The method comprises the following steps of: sequentially opening a tail gas valve, an exhaust valve, a monitoring air inlet valve and a monitoring air outlet valve, and then starting an online gas chromatograph to monitor the concentration of SO2, wherein the SO2 content of the tail gas is high when the gas phasedeactivation process starts, and the volume concentration of the SO2 is reduced to 0.001-0.09 percent after 7 to 19 hours; and finishing the tower reaction when the volume concentration of the SO2 isnot changed in 30 to 60 minutes, finishing the gas phase deactivation, and resetting the valves. Compared with the deactivation method in the prior art, the method has the advantages that: the treatment of waste gas is easy; the gas phase deactivated waste gas can reach discharge standards by simple treatment; the treatment time is short; the cost is low, and the implementation is simple; oxygen rich air is mainly used in the gas phase deactivation, is convenient to use and has low cost; and because of gas phase action, channeling and dead angles are not caused.

The application discloses a 3D storage device and a manufacturing method thereof. The 3D memory device includes: a substrate; a gate stack structure located above the substrate, the gate stack structure including a plurality of gate conductors and a plurality of interlayer insulating layers stacked alternately; penetrating through the gate stack A plurality of channel pillars of a structure, the plurality of channel pillars comprising: a core including a fill layer containing a passivation element; a channel layer surrounding the core, the channel layer containing the passivation elements. In the 3D memory device, since the filling layer is located inside the channel pillar, the passivation element can diffuse in the channel layer of the corresponding channel pillar. Compared with the technical solution of setting the passivation element source outside the channel, it avoids the problem that the passivation element cannot be effectively diffused to the channel layer due to the back-end line and the stacked structure blocking the diffusion of the passivation element, thereby improving Yield and reliability of 3D memory devices.

The invention discloses an electroplating passivating device. The electroplating passivating device comprises a guide rail, a driving device, a connecting device, a passivated product placing barrel and a passivating pool, wherein the passivating pool is internally provided with a passivating liquid conveying pipe; the guide rail is transversely arranged; clamping jaws are arranged on the connecting device; a clamping jaw positioning groove is formed in the outer wall surface of the upper end of the passivated product placing barrel; the passivated product placing barrel is positioned over the passivating pool; the passivated product placing barrel is driven by the driving device to decline and sink into the passivating pool; a passivating liquid limiting guiding device for enabling passivating liquid to flow upwards is arranged on the bottom surface of the passivating pool at the position of the middle part; the passivating liquid limiting guiding device comprises a guiding cylinder, the guiding cylinder is vertically arranged, the height of the upper end face of the guiding cylinder is arranged to be lower than the upper end face of the passivating pool, and the lower end of the guiding cylinder is fixedly or detachably connected with the bottom surface of the passivating pool. Through the technical scheme, the electroplating passivating device is reasonable in structure set, simple in structure, convenient in operation, uniform in passivation for each surface of the product and high in processing efficiency.

The invention discloses a passivated magnesium powder, a passivated aluminum-magnesium alloy powder and a wet-process production process thereof. Magnesium grains, aluminum-magnesium alloy grains and an antioxidant aqueous solution are added to wet-type pulverization equipment for wet-process pulverization, and then the solid-liquid The mixture is subjected to wet sieving or hydraulic classification to complete solid-liquid separation, and after drying, passivated magnesium powder or passivated aluminum-magnesium alloy powder is obtained. The particle surface of the obtained finished magnesium powder and aluminum-magnesium alloy powder is coated with a passivation protective film. The powder production process of the present invention is all carried out under the water-soluble protection of the antioxidant, and is a production method with high safety factor, simple equipment and excellent site environment. Passivation, crushing and particle size classification can be completed in one step. The passivation of the finished product is uniform, dense, stable, and has excellent oxidation resistance. The antioxidant solution can be recycled for a long time without waste water discharge, and is an environmentally friendly process method.