37results about How to "Does not affect the composition" patented technology

The invention discloses a technology for processing a green body of daily ceramic tableware and relates to the technical field of daily ceramics. The technology comprises the following steps: (1) preparing raw materials; (2) preparing mud; (3) filtering and dewatering the mud; (4) performing vacuum pugging; (5) cutting the mud; (6) forming the green body; (7) pre-drying the green body. According to the technology disclosed by the invention, by virtue of a manner of adding a small amount of nano titanium dioxide and crude molecular sieve powder into the raw materials, the thermal shock resistance of the prepared green body is obviously improved, and the problem that the green body produces cracks even fissures under continuous high-temperature raise conditions when immediately transferred into a kiln from a room temperature environment is solved; therefore, the yield of the fired green body is improved. Due to two-stage pre-drying treatment of the green body, the contained moisture is slowly volatilized, and the condition that the green body is directly transferred into the kiln to produce deformation due to sudden drop of the moisture content is avoided, so that the yield of the fired green body is further improved.

The invention discloses a production process of iron-free and manganese-free white copper B10, which belongs to the field of non-ferrous metal production, improves production efficiency, reduces production costs, and improves the market competitiveness of products. The production process of manganese-nickel-copper B10, nickel-copper B10 is produced through an open-type industrial frequency induction furnace, including the following steps: S10: Baking the furnace when starting the furnace, removing iron impurities before using the carbon material, and baking the crystallizer and stopper before using; S20: Add cupronickel return material, electrolytic copper and electrolytic nickel to the furnace, cover the surface with the first insulation layer, and add deoxidation material for deoxidation; S30: The raw materials in step S20 are cast to obtain cupronickel B7, and the liquid surface covers the second insulation layer during casting ; S40: Add electrolytic nickel, electrolytic copper and deoxidizing material to the bottom material of cupronickel B7, and cover the surface with the first insulation layer; S50: the raw materials in step S40 are cast to obtain cupronickel B10, and the liquid surface covers the second insulation layer during casting.

The invention discloses a method for preparing aluminum-scandium alloy by adopting a segmented counter-current reduction method. According to the method, the whole reaction process is divided into multiple sections; and scandium-containing alloy and scandium-containing raw material (slag phase or molten salt ) are reversely moved in the whole process so as to ensure that high-scandium-content rawmaterial is used for reducing high-scandium-content alloy, low-scandium-content raw material is used for reducing low-scandium-content alloy, on one hand, the alloy material meeting the required scandium content can be obtained, and on the other hand, scandium content in the final waste slag (or the molten salt) can be reduced to the largest extent so that the actual yield of scandium can be greatly improved; and the alloy containing active metals such as magnesium and calcium can be used as the raw material in a primary stage reaction, the scandium in the raw material can be reduced to the maximum extent, and the content of the scandium in the waste slag (or the molten salt) is reduced to the minimum, meanwhile, due to the fact that calcium and magnesium are more active than aluminum andscandium, the residual extremely small amount of calcium and magnesium impurities can also be oxidized into the slag phase (or the molten salt) in the later reduction reaction and are finally discharged from the alloy, and components of a final product is prevented from being influenced.

The invention discloses a NaNO3 heat storage material high in specific heat capacity. The material is prepared with NaNO3 as a raw material and urea as fuel through modification by using a solution combustion method. The stoichiometric ratio of the raw material NaNO3 to the fuel urea is 2:(1-4). The phase of the NaNO3 heat storage material obtained through the method is still NaNO3, linear structures, needle-shaped structures, spherical structures and other special structures grow on the surface of the material and in the material, the solid-state specific heat capacity can be increased to 1.87 J / (g DEG C) and is increased by 43.8% compared with that of ordinary NaNO3, and the liquid-state specific heat capacity can be increased to 1.86 J / (g DEG C) and is increased by 51.2% compared with that of the ordinary NaNO3. The NaNO3 heat storage material has the advantages of being high in specific heat capacity, special in structure and the like, a modification method is simple, and a new idea is provided for modification of the molten salt heat storage material.