67results about How to "Avoid production impact" patented technology

The invention relates to an MC5 steel and a large-sized flattening roll prepared by using the same, and a manufacturing process of the MC5 steel, wherein the MC5 steel comprises the following chemical components in weight percentages: 0.75%-0.90% C, 0.40%-0.80% Si, 0.20%-0.50% Mn, 4.80%-5.20% Cr, 0.30%-0.60% Ni, 0.20%-0.60% Mo, 0.10%-0.20% V, less than or equal to 0.015% P, less than or equal to 0.015% S, less than or equal to 0.20% Cu, less than or equal to 0.01% Al, less than or equal to 0.02% Pb, less than or equal to 0.02% As, less than or equal to 0.02% Sn, less than or equal to 0.02% Sb, less than or equal to 0.02% Bi, less than or equal to 2 ppm of H, less than or equal to 30 ppm of O, less than or equal to 120 ppm of N, and rest being Fe and inevitable impurities; and the MC5 steel is capable of meeting the utilization requirements of high-end metal plate rolling and long service life of the flattening roll.

The invention relates to a metering and mixing device, which comprises a feed box, a first metering device, a second metering device, a stirring device, a power device, a third metering device, and amaterial receiving device. The first metering device is arranged in the feed box and is arranged in the upper part of the feed box. The second metering device is arranged in the exterior of the feed box and is arranged on the upper part of the feed box. The stirring device is arranged in the feed box and is arranged in the lower part of the feed box. The power device is arranged in the exterior ofthe feed box and is arranged on the lower part of the feed box and is connected to the stirring device. The third metering device is arranged in the exterior of the feed box and is arranged on the upper part of the feed box. The material receiving device is arranged on the bottom of the feed box. The mixing and metering device is provided with a plurality of metering devices and can carry out small weight multi-time metering to ensure that materials can be fed into the mixing device stably and continuously. The production efficiency and qualified rate are both increased. Furthermore, the stirring device has a special stirring blade structure and can greatly reduce dust during the material mixing process.

The invention discloses a waterlogging-avoiding crop cultivation method for karst peak-cluster depression area. The method comprises: a. arrangement of a crop planting system, which is to plant pasture; and b. waterlogging-avoiding cultivation method for crop in the depression area: A. waterlogging-avoiding potato cultivation which comprises the steps of potato seed selection and germination, land preparation and fertilizer application, seeding, management and harvest, wherein potato blocks with dedicate, bright and smooth skin are selected as potato seeds and are stored in stacks before seeding, fertilizer application is carried out before land preparation, seeding is carried out after rain when soil contains enough water; B. waterlogging-avoiding corn cultivation which comprises the steps of introducing a new corn variety, planting corn seeds and covering a plastic film in the early growth period of the corn to advance the maturation period of the corn, and top dressing; and C. depression area pasture cultivation which comprises seedling and fertilizer application, field care and fertilizer application, intertillage and weeding, wherein intertillage is carried out together with fertilizer application to improve the resistance of the pasture and to accelerate the growth of the pasture after waterlogging. The method is easy to implement and operation, increases economic incomeand avoids damages to ecological environment.

The invention discloses a multi-stage air purification device for a workshop. The multi-stage air purification device comprises a box body, and an air inlet pipe is fixedly connected to the left sideof the box body. A gas collecting fan is rotatably connected to the inner portion of the left side of an air guide duct, and the lower end of a layering purifier is fixedly connected with a pressure dissolved air tank. A culture medium table is fixedly connected to the middle portion of a purifying pond, and a sediment scraper is arranged above the purifying pond. An ion purifying box is arrangedabove the sediment scraper, and negative ion poles are fixedly connected to the middle portion of the ion purifying box. The upper ends of the negative ion poles are fixedly connected with ionizationrods, and deposition storage bins are fixedly connected to the inner walls of the left side and the lower side of the ion purifying box. The upper left inner wall of the ion purifying box is fixedly connected with positive charge poles, and adsorption strips are fixedly connected to the outer sides of the positive charge poles. A drying box is arranged on the right side of the ion purifying box, and the left end of a U-shaped tube is fixedly connected with the air guide duct. The right end of the U-shaped tube is fixedly connected with an exhaust pipe, and a small electromotor and the ionization rods are electrically connected with an external power source. The multi-stage air purification device has the advantages of low consumption, high efficiency, multi-stage thorough purification, simple operation and no secondary pollution.

The invention provides an automatic shifting producing device for a silent bearing retainer. The device comprises a feeding assembly, a shifting assembly, a forming die, a shaping die and a punching die, wherein the feeding assembly comprises a feeding hydraulic cylinder, a position fixing plate and a pushing plate; the shifting assembly comprises a first transverse guide rod, a second transverse guide rod, a left longitudinal guide rod, a right longitudinal guide rod, a transverse returning spring and a longitudinal returning spring; the forming die comprises an upper forming die and a lower forming die; the shaping die comprises an upper shaping die and a lower shaping die; the punching die comprises an upper punching die and a lower punching die; the upper punching die comprises a punching propping plate, punching pins and a guide plate, wherein the punching pins are arranged as a circle; a plurality of guide holes through which the punching pins pass are formed in the guide plate; a circular clamping groove is formed in the bottom part of the guide plate; a circular supporting groove for storing the silent bearing retainer is formed in the top part of the lower punching die. The device is reasonable in structural design, enables automatic shifting of a workpiece in processing, is high in processing accuracy, produces few wastes, and is beneficial for production and application.

The invention discloses a pretreatment method for purifying impurities in the supernatant liquid in zinc hydrometallurgy, which comprises adding manganese powder into the acidic leaching pulp of zinc hydrometallurgy for leaching and concentrating; introducing the obtained supernatant liquid with high impurities into buffer tank I And add ferrous sulfate to fully mix and dissolve; import the mixed and dissolved solution into buffer tank II and add hydrogen peroxide to fully mix and undergo a chemical reaction; introduce the mixed and chemically reacted solution into buffer tank III and add milk of lime to adjust the acidity of the solution; The solution with adjusted acidity is introduced into the buffer tank IV, and silicon purification and filter performance improver are added; the treated solution is input into the storage tank with a stirrer, and the liquid and solid are separated while stirring to obtain the pretreated supernatant and the pretreated scum. The present invention adopts the method of combining chemistry and physics to pretreat the supernatant liquid with high impurities leached from high-impurity raw materials of zinc hydrometallurgy, realize the opening of harmful impurities and suspended matter in advance, and reduce the pressure and pressure of directly using zinc powder for replacement and purification. Zinc powder is saved.