6 results about "Pulverized fuel ash" patented technology

The invention discloses high-volume industrial solid waste composite Portland cement and a preparation method thereof. The high-volume industrial solid waste composite Portland cement is prepared fromthe following raw materials in parts by weight: 85-115 parts of cement clinker, 5-6 parts of modified desulfurized fly ash and 0.05-0.1 part of a grinding aid, wherein the cement clinker is preparedfrom the following raw materials in parts by weight: 95-95.9 parts of a fired cement raw material and 4.1-5 parts of coal ash; the cement raw material is prepared from the following raw materials in parts by weight: 42.5-45 parts of carbide slag, 15-17 parts of iron tailings, 5-6 parts of fly ash, 35-40 parts of limestone and 2 parts of iron ore powder. According to the invention, industrial solidwastes such as carbide slag, iron tailings, desulfurized fly ash and the like are fully utilized, so that the preparation of the high-volume industrial solid waste composite Portland cement is realized, the problems that the industrial solid wastes such as carbide slag, iron tailings, desulfurized fly ash and the like occupy a large amount of land resources and cause serious environmental pollution are solved, and the utilization rate of the industrial solid wastes is improved.

The invention discloses a processing method for preparing modified plastic rubber through utilizing waste plastic and waste rubber. The processing method is characterized by comprising the following technological steps: (1) selecting raw materials, namely by weight percent, respectively selecting 30-40% of waste rubber which is obtained by crushing waste styrene butadiene rubber (SBR) (synthetic rubber which is prepared by polymerizing styrene and butadiene emulsion), 15%-20% of wood meal and 55-60% of industrial waste sand as the raw materials, wherein each 100 kilograms of the raw materials contain 5 kilograms of waste oil and the industrial waste sand contains waste plastic, pulverized fuel ash and calcium carbonate; (2) crushing and grinding; (3) stirring and smelting; (4) melting and mixing; (5) forming; (6) classifying and packaging; (7) forming plate products. The processing method is reasonable and simple in technology, the technological process is greatly shortened, the production cost is lowered, and the yield is increased; the formed particles have smooth surfaces, so that dust production is reduced or eradicated in feeding and mixing processes during the production; the processing method satisfies the requirements of a production technology, is accurate in feeding amount and ratio, generates small deviation and ensures the product quality, and the yield of enterprises is effectively improved.

The invention discloses a treatment machine for increasing surface roughness of plastic foam particles. The treatment machine is mainly characterized in that a driving shaft of an electric device is fixedly connected with a flying bar in a material bin inner cavity; at least two sets of sawtooth-shaped blades are distributed and connected on a frame of the flying bar in the axial direction; the edges of blade teeth of the opposite sawtooth-shaped blades of on the flying bar are annularly sleeved with a sleeve with sieve holes distributed in the outer circle with the distance a=2 mm to 6 mm, and the sleeve is connected with a material bin; a feeding hole is formed in the other end of the material bin and corresponds to a feeding end opening of the flying bar. Under the action of outside suction force in the work process, the blade teeth on the sawtooth-shaped blades on the flying bar rotate, the surfaces of the plastic foam particles adsorbed on the surface of an inner cavity of the sleeve are scratched and pulled, roughness is increased, and then the plastic foam particles are sucked into the material bin through the sieve holes in the surface of the inner cavity of the sleeve through extrusion to be discharged out. The plastic foam particles with the rough surfaces are in mixed and coated connection through cement and pulverized fuel ash, the adhesive force is high, mixtures are evenly stirred, the material of a forming die shell is even and dense, connecting strength is high, and machining quality of die shell production is improved.

The application discloses a manufacturing method of high-performance marine concrete. The method comprises the following steps: Step 1, weighing the following raw materials (by weight): 35-50 parts of cement, 9-15 parts of medium-coarse sand, 10-11 parts of crushed stone, 20-26 parts of blast furnace slag, 13-19 parts of coal ash, 2-5 parts of silica fume, 1.5-3 parts of a rebar corrosion inhibitor and 0.5-2 parts of a water reducing agent; Step 2, taking out medium-coarse sand and washing off dirt on the surface, taking out cleaned medium-coarse sand and airing to remove moisture; Step 3, taking all cement, putting cement into an agitator and stirring; Step 4, continuously adding crushed stone, blast furnace slag, coal ash and silica fume into the agitator, and uniformly stirring the mixture; Step 5, continuously adding the rebar corrosion inhibitor into the agitator, and adding a few amount of water; and Step 6, continuously adding the water reducing agent into the agitator, and stirring for 1 min so as to prepare the high-performance marine concrete. The concrete has low apparent density, strong corrosion resistance and good stability. By the use of lots of medium-coarse sand and crushed stone, apparent density of the concrete product is reduced. The product is applicable to severe environments such as a maritime environment.