50results about How to "Consistent granularity" patented technology

The invention relates to a sand stone dehydration collection device for engineering buildings, wherein the sand stone dehydration collection device includes a dehydration output base and a stirring input mechanism arranged on the dehydration output base; the dehydration output base is also provided with a filter collection mechanism connected with the stirring input mechanism, and the filter collection mechanism comprises a machine box body erected on the upper part of the filter output base. The sand stone dehydration collection device can quickly collect fine sand in rivers; the collected fine sand particles have same size and good quality, and can be used directly in the engineering buildings. At the same time, the device clean silt in the rivers while collecting the fine sand, and hasthe cleaning and environmental-protection functions; and the device is convenient to operate and use and has less human input.

The invention relates to a preparation method of a hydrocarbon hydrogenation treatment catalyst. The catalyst uses γ-Al2O3 as a carrier, VIB and VIII metals as active components, and Ti as active auxiliary agents. The catalyst promoter Ti of the present invention is introduced in the process of producing aluminum hydroxide by the carbonization method by adopting the pH swing method. The preparation method of the catalyst is a complete mixing and kneading method, that is, the aluminum hydroxide dry rubber powder introduced into Ti by adding a titanium salt solution is first added to an alkaline solution containing Mo and / or W, and fully kneaded until the aluminum hydroxide powder is completely mixed. Wet by alkaline solution, then add acidic solution containing Co and / or Ni, knead until the material becomes plastic, extrude, dry and roast to obtain the catalyst. The distribution of the catalyst auxiliary agent Ti prepared by the method of the invention is more uniform, and the performance of the catalyst is obviously improved.

The invention discloses a concrete material having the functions of heat conduction and heat storage, and a preparation method thereof, and belongs to the technical field of building materials. The concrete material having the function of heat conduction and heat storage, disclosed by the invention, comprises 15-25 parts of cement, 15-25 parts of quartz sand, 15 -25 parts of natural pebbles, 10-15 parts of graphite, 20-30 parts of water, 1-3 parts of water reducing agents, 1-3 parts of expanding agents, 5-10 parts of phase-change polyethylene microcapsules and1-5 parts of aramid fibers. The preparation method comprises three steps: step 1) preparing cement slurry and performing the heat conduction on the cement slurry; step 2) preparing hot concrete slurry; step 3) pouring concrete. The working procedures are simple. Through the adoption of the concrete material and the preparation method, disclosed by the invention, the double purposes of good heat conducting effect and good heat storing effect for the concrete material having the functions of heat conduction and heat storage can be realized.

The invention discloses a splitting core column for synthesizing diamond and a preparation method thereof. The splitting core column for synthesizing the diamond comprises a core column tube, wherein a core column is arranged in the core column tube, a first core column piece is arranged on the upper end of the core column tube, and a second core column piece is arranged on the lower end of the core column tube. According to the splitting core column for synthesizing the diamond, different mixing ratios of peripheral materials to internal materials are adopted, and the weight ratio of catalysts of the peripheral materials is controlled to be higher than that of the core column by 4% to 8%, so as to effectively control the granularity of the peripheral materials, thereby reducing the growth rate of the peripheral materials, so that the whole core column for synthesis grows at uniform speed in the process that graphite is converted into the diamond, and the granularity of the synthesized diamond is uniform; the isostatic pressing granulation granularity range of the core column pieces and the core column tube and the isostatic pressing granulation granularity range of the core column are controlled, so that materials are uniformly fed into a die cavity during pressing, and the density of pressed products of the core column pieces, the core column tube and the core column is uniform, thereby guaranteeing the quality and the yield of the synthesized diamond.

The invention discloses a long-life steel for fracturing pump valve body suitable for unconventional oil and gas operations, which belongs to the field of alloy steel. The steel for fracturing pump valve body contains: C 0.30%-0.45%, Si 0.15 %~0.35%, Mn 1.5%~2.5%, Cr 0.8%~1.0%, Mo 0.6%~0.8%, Ni 2.00%~2.50%, V 0.05%~0.25%, Al 0.015%~0.040%, Sb 0.01% ~0.03%, P≤0.015%, S≤0.015%, N≤0.0080%, O≤0.004%, the rest is Fe and other unavoidable impurities; the above element composition ratio should meet: 1) 0.20%≤%C‑ (0.077×%Cr+0.24×%V)≤0.32%; 2) 4×%Ni+1.2×%Cr‑1.5×%Si+17×%Sb+10×%V‑9×%Ni×%Sb‑ 5 x %Mn ≥ 1.0. The tensile strength at 1 / 4 thickness of the fracturing pump valve body prepared by using the above steel is ≥1050MPa, the yield strength is ≥900MPa, ‑27℃KV 2 ≥100J; 140MPa stress, fracturing fluid environment, stress corrosion fatigue life ≥3.5 million times, meeting the 350h service requirement of fracturing pumps.