33results about How to "Reasonable component design" patented technology

The invention discloses a ready-to-prepare sodium alginate hydrogel fire extinguishing agent which comprises modified sodium alginate hydrogel, filler and water-absorbent resin, the filler comprises a first additive, a second additive and a third additive, and the first additive is a conventional dry powder fire extinguishing agent and comprises ammonium dihydrogen phosphate, ammonium sulfate, auxiliaries and other materials. When the first additive is prepared, firstly, main materials such as ammonium dihydrogen phosphate and ammonium sulfate are crushed by a supersonic jet mill to obtain superfine mixed powder, and the mixed powder is fine in particle size, narrow in particle size distribution, high in overall surface activity and convenient for subsequent modification; according to the ready-to-prepare sodium alginate hydrogel fire extinguishing agent and the preparation method thereof, the component design is reasonable, the process operation is simple, preparation of the sodium alginate hydrogel fire extinguishing agent can be achieved, and the fire extinguishing agent is excellent in fire extinguishing performance and has high practicability.

The invention discloses semi-rigid concrete and a preparation process thereof. The semi-rigid concrete is concrete which is prepared through replacing part of fine aggregate of ordinary concrete with a flexible material and then blending, wherein the mass of the replaced fine aggregate is equal to that of the replacing flexible material; the flexible material contains the following ingredients in percentage by mass: 30-40% of rubber powder, 30-40% of rubber grains, 0.5-1.5% of polypropylene fibers, 3-8% of fly ash and 20-28% of mineral admixture; zinc stearate is required to be removed from the surfaces of the rubber grains and the surface of the rubber powder through a strong-base solution. The preparation process comprises the steps: (1) preparing the flexible material and carrying out grading combination in proportion; (2) preparing the semi-rigid concrete. According to the preparation process disclosed by the invention, the steps are simple, the operation is simple and convenient, the invested cost is low, the use effect is good, and the defects in the existing ordinary concrete that the deformation is little, the brittleness is high, the tensile strength is low, and the like can be made up.

The invention discloses a high-toughness atmosphere corrosion resistance flux-cored solder wire and a preparation method thereof. The flux-cored solder wire is made of carbon steel cold-rolled steel strip and a flux core. The flux core comprises, by mass, 25-40% of rutile, 3-7% of quartz sand, 1-3% of magnesite, 3-12% of aluminosilicate, 1-4% of sodium fluoride, 1-3% of sodium oxide, 5-15% of low-carbon ferromanganese, 3-7% of ferrosilicon, 2.5-5.5% of Ni, 2.5-7% of Cr, 1-3% of Cu, 1.5-5.5% of ferrotitanium, less than or equal to 3% of ferromolybdenum and ferrovanadium, and the balance iron powder. According to the flux-cored solder wire, welding is carried out with 100% of CO2 as protective gas, so that the flux-cored solder wire has good welding usability, and the low-temperature impact absorbing energy of the flux-cored solder wire at minus 40 DEG C is greater than 60J. Moreover, the flux-cored solder wire has good atmosphere corrosion resistance and can meet the requirements for welding of weather resistant steel with the yield strength being 450 MPa.