4results about How to "Overcome expensive" patented technology

The invention discloses a method for preventing steel for producing pure iron by a pusher-type heating furnace from generating cracks. The method comprises the following steps: changing a charging and discharging mode and ensuring in-furnace time; improving a heating process; the special roller is specially used; bending is controlled, and perpendicularity is improved. According to the production method for eliminating the defects of the industrial pure iron flat steel rolled by the double furnaces, the defects of the pure iron rolled by the double furnaces are eliminated, double-furnace production is carried out by adopting the pusher furnace and the stepping furnace at the same time, the yield and the product physical quality are improved, the yield is increased, the efficiency is increased, and meanwhile the product quality percent of pass reaches 97% or above.

The invention discloses a double-layer filtering device for simultaneously detecting various bacteria and a detection method. The double-layer filtering device comprises a liquid input device, a hollow filtering pipe, a liquid output device, a large-aperture fiber membrane and a small-aperture fiber membrane; the liquid input device is connected with a water inlet of the hollow filter tube, and the water inlet is covered with a large-aperture fiber membrane; the liquid output device is connected with the water outlet of the hollow filter tube, and the water outlet is covered with a small-aperture fiber membrane. The double-layer filtering device can be used for rapid water sample treatment and SERS analysis, meanwhile, the provided detection method has the advantages of simplicity, rapidness, cheapness, anti-jamming capability and robustness, can be applied to the field, opens up a new way for promoting development of multifunctional analysis tools in drinking water and food safety monitoring and management, and has a wide application prospect. The method is of great significance to water quality detection and control.

This invention belongs to the field of metal composition analysis technology and discloses a method for determining ultra-low carbon and sulfur content in high-purity nickel. This method addresses the problems of matrix mismatch and insufficient detection range in existing detection methods by achieving accurate determination through the following steps: 1. Pre-treating the high-purity nickel sample using acetone ultrasonication and hydrochloric acid immersion to remove surface impurities; 2. Preparing a series of reference reagent standard samples using sucrose and sulfate standard solutions to adapt to the high-purity nickel matrix; 3. Constructing a standard curve with dual calibration of solid standard samples and reference reagents, extending the detection range to 0.0005%~0.005% for carbon and 0.0001%~0.002% for sulfur; 4. Subtracting interference through blank experiments and calculating the carbon and sulfur content in the sample according to the formula. The carbon and sulfur spiked recoveries of this invention are 95%~103% and 96%~102%, respectively, with relative standard deviations of <13.2% and <22.0%, respectively. It features fast analysis speed, high accuracy, and traceable results, and is suitable for the detection of ultra-low carbon and sulfur content in high-purity nickel and similar metal materials.

The present invention relates to a preparation for rapidly promoting the germination and rooting of Tamarix chinensis cuttings and a preparation method thereof. The raw material formula is: 500-1000 mg / L of indolebutyric acid, 250-500 mg / L of cytokinin, and the rest is double distilled water. Under the treatment of the preparation, the survival rate of Tamarix chinensis cuttings can be rapidly improved, the growth of the aboveground part and the root system can be promoted, and the cutting propagation rate of Tamarix chinensis branches can be significantly improved.