52results about How to "Strong peeling resistance" patented technology

The invention discloses a conveying tank and a manufacturing method thereof, and pumping equipment with the conveying tank. The manufacturing method for the conveying tank comprises the following steps of: machining to form a preparation tank body; performing primary electroplating on the surface of the preparation tank body, and performing dehydrogenation treatment on a plating layer after the primary electroplating to form a first chromium layer with the rigidity of HRC58 to 60 and the thickness of 0.15 to 0.2mm; and performing secondary electroplating on the surface of the first chromium layer to form a second chromium layer with the rigidity of HRC66 to 68 and the thickness of 0.15 to 0.2mm so as to form the conveying tank. In the method, the first hard chromium layer and the second hard chromium layer which have matched thickness and rigidity are electroplated on the inner surface of the tank body, so that the abrasion resistance of the whole conveying tank is improved, the anti-stripping capacity of all the hard chromium layers is improved, and the service life of the conveying tank is prolonged.

The invention particularly relates to an electric smelting magenisum aluminum spinel brick for a coal water slurry gasifying furnace and a preparation method of the electric smelting magenisum aluminum spinel brick. The technical scheme is as follows: the preparation method comprises the following steps of: taking 58-74 wt% of industrial aluminum oxide powder and 26-42 wt% of light roasting magenisum oxide powder as raw materials; additionally adding carbon powder which is 0.5-3.0 wt% of the raw materials; uniformly agitating; putting the mixture into an electric arc furnace and electrically smelting by utilizing a 100-220 V voltage until all the raw materials are fused; continually smelting for 30-60 minutes and casting a smelted high-temperature synthetic material into a casting mould; then, placing the material into a tunnel kiln to be annealed by a belt mould under the condition of 1350-1550 DEG C, wherein the annealing period is 72-120 hours; discharging the material out of the kiln under the condition of 30-80 DEG C and de-molding; and finally, carrying out mechanical machining on a de-molded product to obtain the electric smelting magenisum aluminum spinel brick. The electric smelting magenisum aluminum spinel brick prepared by the invention has the characteristics of low apparent porosity, strong anti-stripping capability and good anti-coal-slag penetrating performance, and can better adapt to a working environment of a hot surface of a liner of the coal water slurry gasifying furnace.

The invention relates to a magnesium oxide-silicon carbide composite for the upper part of a copper smelting converter and a preparation method of the composite. The technical scheme is as follows: firstly, 40wt%-60wt% of fused magnesia particles, 5wt%-25wt% of silicon carbide particles, 6wt%-16wt% of sintered magnesia fine powder, 5wt%-15wt% of zircon fine powder, 4wt%-8wt% of raw alumina micro powder, 3wt%-7wt% of titanium oxide fine powder, 1wt%-3wt% of monatomic silicon fine powder and 2wt%-5wt% of nickel oxide fine powder are taken as raw materials, 6wt%-10wt% of zirconium oxide sol and 1wt%-3wt% of cerium oxide micro powder are added, uniform mixing, forming and drying are performed, the obtained mixture is kept at the constant temperature of 1,250-1,450 DEG C in a carbon embedded atmosphere for 2-8 h, then impregnated in a zirconium oxychloride solution for 0.5-3 h and kept at the constant temperature of 600-900 DEG C for 2-6 h, and the magnesium oxide-silicon carbide compositefor the upper part of the copper smelting converter is obtained. The produced product has the characteristics of environmental friendliness, low apparent porosity, high anti-stripping capacity and excellent residue permeation corrosion resistance.