50results about How to "Improve final product quality" patented technology

The present invention discloses a kind of wet zinc smelting process, which includes four main technological steps of neutral leaching, low temperature pre-neutralizing, high temperature high acid concentration leaching, and low pollution vanadium settling and iron removing. Before low pollution vanadium settling and iron removing, the high temperature high acid concentration leaching step has iron leached at most, and the solution composition is regulated in the low temperature pre-neutralizing step for satisfactory iron removing effect during vanadium settling without need of adding neutralizing agent. The technological process is suitable for treating complicated zinc concentrate, and has raised metal recovering rate, strengthened impurity removing capacity, raised ultimate product quality, lowered material and power consumption and reduced pollution.

The invention relates to a die box component for reducing the drawing diameter of a metal wire on a water tank wire drawing machine. The die box component comprises a die holder, a die sleeve, a joint bearing, a wire drawing die, a die pin and a limit screw, wherein the die holder is fixedly arranged on a tank body of the wire drawing machine; the die sleeve is arranged in the die holder through the joint bearing, and is provided with a shaft retainer ring for limiting the axial movement of the die sleeve in the joint bearing; the head end of the die sleeve is provided with a conical wire inlet; the tail end of the die sleeve is provided with a concave cavity; the wire drawing die is arranged in the concave cavity, and is compressed and fixed through the hollow die pin; the outer wall of the tail part of the die sleeve is provided with a limit groove; the tail part of the die holder is provided with the limit screw; and the inner end of the limit screw is pressed in the limit groove, and is used for limiting the rotation of the die sleeve. The die box component has a skillful, compact and reasonable structure; and the wire drawing die is arranged through the joint bearing, and can be finely adjusted in a certain angle range according to the height of the metal wire, so that the metal wire is prevented from being damaged, the final product quality is improved, and the service life of the die box component is prolonged.

The invention relates to a chamfering grinding wheel for machining a silicon single crystal wafer for thick-layer epitaxy, and a chamfering method. The diameters of coarse chamfering grooves of the grinding wheel are 120-150 micrometers less than the thickness of the wafer; half angles are 18-22 degrees; the depths are 900-1100 micrometers; the diamond sizes are 600-1000#; the diameters of fine chamfering grooves are 160-180 micrometers less than the thickness of the wafer; half angles are 11 degrees; the depths are 1400-1600 micrometers; the diamond sizes are 1000-2000#; the rotating speed of the coarse chamfering grinding wheel is 2500-5000rpm; machining is conducted for 1-2 rings; the rotating speed of the wafer is 16-20mm / s; the rotating speed of the fine chamfering grinding wheel is 3000-5000rmp; machining is conducted for 2-4 rings; and the rotating speed of the wafer is 10-15mm / s. The edge chamfering is conducted on the wafer by adopting the chamfering grinding wheel, so that the accuracy of an edge contour is high, the consistency of the edge quality is good, and the problem of a slip line due to the defect of the edge of the silicon wafer in a growth process of the thick-layer epitaxy is solved effectively.

The invention relates to industrial grade calcium hydroxide production equipment which comprises carbide slag bin, a lime bin, a feeding screw reamer, a dual-shaft stirrer and a digestion bin. The carbide slag bin and the lime bin are communicated with the feeding screw reamer. An outlet of the feeding screw reamer is communicated with a dual-shaft stirrer feeding inlet of the dual-shaft stirrer. A dual-shaft stirrer discharging outlet of the dual-shaft stirrer is communicated with the digestion bin. A discharging outlet is formed in the lower portion of the digestion bin. The digestion bin is sealed. According to the industrial grade calcium hydroxide production equipment, a traditional calcium hydroxide production technology is changed, a large amount of industrial waste carbide slag is utilized, calcium oxide is added to be mixed and stirred, the novel industrial grade Ca(OH)2 production technology is formed through procedures such as digestion of the digestion bin, a large amount of carbide slag can be utilized with low cost, the technology is widely applied to projects such as power plant desulfuration, and the technology is of special significance in China as the world first calcium carbide production country.

The present application relates to a knitted fiber sorting process and an auxiliary jig, which includes the following steps: S1, installing two layers of carriers on the auxiliary jig in parallel; S2, placing the auxiliary jig on the sewing equipment, and aligning the needles vertically Carrier; S3. The sewing equipment knits the full carrier vertically back and forth between the two layers of carriers; S4. Put the full carrier and auxiliary fixture into the container, pour the liquid colloid to heat and solidify; S5. Place the carrier along the edge of the effective part Cut out the prefabricated product; S6, cut the prefabricated product into a plurality of semi-finished products; S7, grind both sides of the semi-finished product to obtain the finished product. The fiber filaments in the finished thermal pad are parallel to each other in the thickness direction of the finished product and perpendicular to the horizontal direction, which greatly improves the use efficiency of the fiber filaments. At the same time, the two use surfaces of the finished thermal pad are directly connected through the fiber filaments. It has the effect of improving the thermal conductivity of the thermally conductive gasket.

The invention provides a novel low-temperature-dried fermented soybean meal preparation method comprising the steps that: prepared bacillus broth, lactobacillus broth, and yeast broth are added into soybean meal and honey according to a certain ratio; water is added, and the mixture is well mixed, such that a wet soybean mixture is prepared; the prepared wet soybean mixture is delivered into a fermentation tank, wherein a temperature in the fermentation tank is controlled at 20-24 DEG C; fermentation is stopped after 3-5 days of fermentation, such that a fermented soybean wet material is prepared; the prepared fermented soybean wet material is subjected to in-situ bake-drying under a temperature of 50-70 DEG C in the same fermentation tank; the dried material is delivered from the bottom of the fermentation tank, and is crushed, such that the novel low-temperature-dried fermented soybean meal provided by the invention is obtained. With the method provided by the invention, labor efficiency is improved, and heat-sensitive substances and active probiotics with good biological characteristics in the fermented soybean meal are preserved to a maximal extent. Therefore, the quality of a finished product is greatly improved, and feeding performance and nutritional value of fermented soybean meal are greatly improved.