31results about How to "Slow drain" patented technology

The invention relates to a waterborne fireproof coating for an ultrathin expanded steel structure and a preparation method thereof. The fireproof coating is prepared from the following components in parts by weight: 12 to 14 parts of silicone acrylic emulsion, 16 to 18 parts of vac-veova emulsion, 2.0 to 2.5 parts of expanded perlite, 1.0 to 1.5 parts of hollow glass micro-beads, 39 to 42 parts ofa microencapsulated flame retardant measured by a core material, 3.5 to 4.0 parts of a microencapsulated synergistic flame retardant measured by the core material, 4.5 to 5.0 parts of filler, 1.5 to1.8 parts of a preservative and 3.5 to 4.2 parts of a coating additive, wherein the microencapsulated flame retardant is prepared from a silica gel coated intumescent flame retardant, and the microencapsulated synergistic flame retardant is prepared from silica gel coated synergistic flame retardant. The fireproof coating is high in fire endurance and excellent in durability and water resistance;the effective fireproof material and flame retardant compositions of the fireproof coating loss slowly along with external environmental factors; the effective fireproof service life is long; the fireproof flame retarding effect is good; and the fireproof coating is particularly suitable for an outdoor steel structural building.

The invention discloses an iron concentrate powder high-speed dehydration method in a settling pond and belongs to the technical field of metallurgical industry beneficiation. According to the method, multiple rectangular concrete settling ponds with inclined slope bottoms are constructed, an air compressor blowing device is arranged, the tail ends of blowing pipes which are connected into an air compressor are inserted into the pond from the upper end to the lower end of the settling pond for conducting 'compressing and blowing', the extra moisture in the pond is floated out of the surface of the settling pond along with air flow in the pond, standing is conducted for a while, after the clean water on the surface of the pond is drained completely, the moisture content of the iron concentrate powder in the pond can reach 10%, and materials can be discharged. By the utilization of the theories that the iron concentrate powder is not large in density and not prone to absorbing water, the moisture absorbed on the surface of the iron concentrate powder is much and irregular in shape, so that a gap is large and an air flow channel is formed, and therefore the moisture on the surface of the iron concentrate powder is easy to blow out. By means of the method, the high-speed dehydration of the iron concentrate powder in the settling pond of small and medium sized iron ore mine dressing plants can be achieved, the investment is little, and the moisture content is low in a final product.

The invention relates to a pipeline irrigation pressure adjustable and slowly opening and closing type automatic drainage valve which is characterized in that a valve body (8) is connected with a valve body connector (1), connector drainage holes (17) are formed between connector supporting ribs (5) in the valve body connector (1), valve body drainage holes (20) are formed between valve supporting ribs (19) at the rear end of the valve body (8), a sliding shaft (2) is mounted in a connector shaft hole (18) and a valve body shaft hole (21) in a penetrating mode, a spring pressing plate (23) is fixed at one end of a lead screw (10), a drainage pressure adjusting handle (9) is arranged at the other end of the lead screw (10), a spring fixing plate (12) is fixed on the sliding shaft (2), a spring (11) is arranged between the spring fixing plate (12) and the spring pressing plate (23), an arc-shaped leaking water groove (7) is formed in the front end of the valve body (8), and a waterstop rubber ring (13) and the sliding shaft (2) can slide freely in the valve body (8) under the adjustment of the drainage pressure adjusting handle (9).