198results about How to "Facilitate large-scale industrial application" patented technology

A method for removing low-concentration heavy metal in waste water by sludge absorption relates to an isolation technology of heavy metal in waste water. Waste water and sludge of sewage factories are dried at the temperature of 45 to 60 DEG C, crushed to below 0.45 mm, mixed and reacted with low-concentration heavy metal waste water, and the pH is controlled between 3 to 6. After solid-liquid separation, the heavy metal in waste water is purified. The surface radicals of sludge has absorption ability for heavy metal and the remaining sludge of city sewage factories is selected as non-living biomass absorbent to treat waste water so that the method has the advantages of low cost, wide source, simple device, convenient operation and few secondary pollution. The method is particularly applicable to treatment of large-capacity and low-construction heavy metal in waste water, and also can be used for isolating heavy metal as pretreatment working procedure of various biological water treatment technologies. The waste is controlled by waste while high-efficiently isolating heavy metal, therefore, a new way is provided for city sludge resource recycle, ,and the method also has very great potential at the aspect of industrial extension and great economic, social and environmental benefits.

The invention discloses a high-performance deformed rare earth-magnesium-lithium alloy based on island-shaped beta1 nanometer precipitated phase strengthening, and belongs to the technical field of metal materials. The rare earth-magnesium-lithium alloy comprises Mg, Gd, Y, Zn and Li elements, wherein an alloy matrix is composed of alpha-Mg or alpha-Mg plus beta-Li, and a large number of nanoscaleisland-shaped beta1 precipitated phases which are densely and discretely distributed exist in the alpha-Mg matrix. The island-shaped beta1 nanometer precipitated phases generated through a dynamic precipitation mechanism in thermal deformation, and the strength of a magnesium-lithium alloy can be effectively improved through the precipitation strengthening effect. A preparation process comprisesthe steps that the magnesium-lithium alloy is cast under the protection of fused salt and an inert atmosphere, and the rare earth-magnesium-lithium alloy is obtained through extrusion molding after solution treatment. Compared with the prior art, the production efficiency, yield strength, tensile strength and elongation of the alloy are all improved in a breakthrough mode.

The invention discloses a high-modulus magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by weight: 0-19.5wt% of Y, 0-13wt% of Gd,0-2wt% of Zn, 0-3.0wt% of Ni, 4-6wt% of Al, 3-6wt% of Li, 0.3-0.6wt% of Zr, 0-2wt% of Ag, and the balance of Mg and inevitable impurities, wherein the total amount of the impurities is less than 0.12wt%. In the alloy system, aluminum and lithium e added to generate an equilibrium precipitated phase AlLi during solidification, which can greatly increase the elastic modulus of the alloy; in addition to the phase, zirconium reacts with aluminum to generate an Al3Zr phase, and rare earth elements Y and Gd generate a large amount of second phase in the alloy, which all increase the elastic modulus of the alloy to some extent. In addition, after solid solution aging, more precipitated phase AlLi isprecipitated in the alloy to further increase the elastic modulus of the alloy, and the elastic modulus is up to 52-55 Gpa, which can meet the requirements of the engineering field for lightweight high-modulus magnesium alloy materials. The high-modulus magnesium alloy has a good application prospect in the aerospace field.

The invention discloses high-strength and high-stability modified PVC (polyvinyl chloride) which comprises the following components in parts by weight: 100 parts of PVC resin, 20-55 parts of CPVC (chlorinated polyvinyl chloride) resin, 15-20 parts of phenolic antioxidant, 1-12 parts of titanium dioxide, 15-35 parts of plasticizer, 2-8 parts of stabilizer, 0-3 parts of colorant, and 2-10 parts of filling. The high-strength and high-stability modified PVC has the benefits that: the modified PVC has good mechanical property, high strength, good balance of stiffness and toughness, heat resistance, light resistance, corrosion resistance, and high stability; the service life of a product is ensured; in addition, the preparation method is good in repeatability; the process is controllable; the manufacturing cost is low; and the industrial large-scale application is facilitated.

The invention discloses a skid-mounted type building mud treatment device and process. The treatment device comprises a mud homogenizing tank, a screw overlapped type sludge dehydrator, a sludge storage tank, a sludge conveying pump, an agent preparation system, an agent adding pump and an electrical control cabinet which are installed on an overall base or in a container. The mud homogenizing tank comprises mud homogenizing stirring tanks and a mud and agent mixing stirring tank. The mud homogenizing tank is longer in retention time after being improved, and mud is mixed more uniformly and is not prone to settle. The screw pitch is in special reducing design after a screw shaft of the screw overlapped type sludge dehydrator is improved, the spiral angle is gentler, and an abrasion-resistant layer is thicker. Through special structural design, the building mud is rapidly dehydrated on the overall base or in the container, a whole system is high in integration degree, the occupied place is small, the mass is low, the size is small, mobility, environmental protection performance and dehydration speed are high, the effect is good, outward transport disposal cost is reduced, and treated soil can be directly modified and resourcefully utilized.

The invention provides a high electromagnetic shielding effectiveness magnesium alloy and a preparation method thereof. Components of the alloy comprise, by weight percentage, 1-5 wt.% of Zn, 1-5 wt.%of Sn, 0.1-0.5 wt.% of Ca, 0.1-0.5 wt.% of Ce and the balance Mg and inevitable impurities. By adding alloy elements (Mg, Zn, Sn, Ca and Ce) in the magnesium alloy to be matched to hot rolling and hot treatment, the high electromagnetic shielding effectiveness magnesium alloy is achieved. The method includes the specific process steps of smelting, homogenizing, hot rolling and solid solution aging. Adding of a small amount of calcium and cerium alloy elements, forming and precipitating of a second phase are promoted, and the conductivity and the shielding performance of the alloy are improved; meanwhile, due to precipitating of the high-density second phase, electromagnetic waves can also be effectively reflected; besides, in combination of refined crystal strengthening, precipitating strengthening and the like, the alloy has high strength while good electromagnetic shielding performance is achieved. Process equipment related to the high electromagnetic shielding effectiveness magnesium alloy and the preparation method thereof is universal equipment, cost is low, operation is easy, and industrial achievement is easy.

The embodiment of the invention discloses a pattern preparation method which comprises the following steps: enabling a protection layer to be formed in a target region of a first surface of a metal shell, wherein the protection layer is provided with a predesigned pattern, and the protection layer is utilized to protect the area, covered with the predesigned pattern, in the target region; performing corrosion treatment on the other areas, excluding the area covered with the predesigned pattern, on the first surface of the metal shell, so as to enable the first optical characteristic parameter of the other areas, excluding the area covered with the predesigned pattern, on the first surface to be different from the second optical characteristic parameter corresponding to the area covered with the predesigned pattern; and removing the protection layer covering the target region, and enabling the predesigned pattern with the second optical characteristic parameter to be formed on the first surface. The embodiment of the invention further discloses electronic equipment.

The invention discloses a high-strength and high-toughness magnesium-lithium alloy capable of achieving rapid age hardening and a preparation method thereof, and belongs to the technical field of metal materials. 0.1-3 wt% of element Li is added into a Mg-Gd alloy. An alloy matrix comprises an alpha-Mg phase, and a large amount of dense and discretely distributed nanoprecipitates exist in the alpha-Mg matrix. Under the aging condition of 200 DEG C, the peak aging time of the alloy is less than or equal to 12 hours. During peak aging, the yield strength of the alloy reaches 302 MPa; the tensile strength reaches 343 MPa; and the elongation reaches 17.5%. The preparation process of the magnesium-lithium alloy comprises the steps of casting under the protection of molten salt and inert atmosphere, and performing solution treatment, extrusion forming and aging heat treatment to obtain the magnesium-lithium alloy. Compared with the prior art, by simply controlling the content of element Li, the high-strength and high-toughness magnesium-lithium alloy capable of achieving rapid age hardening and the preparation method thereof can significantly enhance an age hardening reaction of the alloy, significantly improve the mechanical properties of the magnesium-lithium alloy, and shorten the peak hardening time.

The invention discloses a dual-phase α+β magnesium-lithium alloy with excellent casting performance and heat transfer performance and a processing technology thereof. According to weight percentage, the composition of the alloy is: Li: 8.0‑10.0wt.%, Ge: 0.2‑0.8wt.%, Cd: 0.6‑0.8wt.%, Bi: 0.2‑0.5wt.%, Zr: 0.4‑ 0.8wt.%, Pd: 0.1‑0.2wt.%, Cu: 0.3‑0.5wt.%, Al: 1.8‑3.4wt.%, Fe: 0.2‑0.5wt.%, Mn: 0.1‑0.4wt.%, The balance is magnesium. The magnesium-lithium alloy for die-casting has high thermal conductivity that traditional magnesium-lithium alloys do not possess. This enables the alloy to have further specific applications in the occasions where the heat generation is large and the weight of the device is required, and it is convenient for large-scale industrial application.

The invention relates to a coal flotation and desulfuration combined inhibitor and an application thereof, and belongs to the technical field of coal washing and dressing. The coal flotation and desulfuration combined inhibitor is prepared from, by mass, 60% to 80% of active ingredient, 10% to 20% of accelerant and 10% to 20% of organic solvent. The active ingredient is selected from at least one of carboxymethylcellulose, humic acid, humate and tannin. The accelerant is selected from at least one of sulfuric acid, muriatic acid and nitric acid. The organic solvent is selected from at least one of acetic acid, ethanol, ethyl acetate and acetone. According to the designed desulfuration inhibitor, after flotation and desulfuration are carried out on sulphur coal, the vast majority of inorganic sulfur and part of organic sulfur can be removed, so that the total sulphur content of obtained clean coal products is below 1%. The desulfuration inhibitor is reasonable in ingredient design, and large-scale industrial application is facilitated.

The invention provides a method for preparing calcium sulfate whiskers and silica sol from low-grade wollastonite. The method includes steps of carrying out smashing, to be more specific, smashing low-grade wollastonite fine ore with a sedimentation value lower than 60 to obtain wollastonite powder, and measuring the content of CaO in the wollastonite powder; carrying out hydrothermal reaction, tobe more specific, adding the wollastonite powder and water into a reaction kettle, adding sulfuric acid into the reaction kettle after the stirring rotational speeds are stable, uniformly stirring the wollastonite powder, the water and the sulfuric acid, adding potassium sulfate into the reaction kettle, carrying out reaction for 75 min, stopping stirring and carrying out filtering to obtain calcium sulfate dihydrate whiskers and silicic acid solution; preparing the calcium sulfate whiskers, and to be more specific, drying the calcium sulfate dihydrate whiskers to obtain the anhydrous calciumsulfate whiskers; preparing the silica sol, to be more specific, purifying the silicic acid solution, regulating the pH (potential of hydrogen) value of the silicic acid solution and concentrating the silicic acid solution to allow the solution density to reach 1.12 g / cm<3> so as to obtain the silica sol. The method has the advantages that the low-grade wollastonite is used as a raw material, thecalcium sulfate whiskers and the silica sol can be prepared by means of low-temperature hydrothermal reaction, accordingly, the added value can be greatly increased, application markets can be expanded, and the method is simple and is easy to operate.