11 results about "Pitch" patented technology

The invention relates to a solid waste-based baking-free environment-friendly hollow brick and a preparation method thereof, and belongs to the field of solid waste utilization environmental protection and the field of hollow bricks. Red mud, mineral powder, industrial by-product gypsum, fly ash, silica fume, aluminum ash, carbide slag, wastewater and other solid wastes and waste liquids are usedas main raw materials. The hollow brick comprises the raw materials in parts by mass: 35-50% of red mud, 30-45% of mineral powder, 10-20% of industrial by-product gypsum, 5-15% of a reinforcing agent,0.5-3% of a cementing agent and the balance of sewage or wastewater, wherein the reinforcing agent is prepared by mixing 15-23% of silica fume, 10-25% of aluminum ash, 20-30% of fly ash, 15-30% of carbide slag, 5-10% of zeolite powder and 5-15% of asphalt. Large-scale resource utilization of solid waste is achieved, the occupied area of the solid waste is reduced, environmental pollution is reduced, no natural mineral resources are consumed during preparation, multiple solid waste and waste liquid are used as main raw materials of the baking-free hollow brick, and the product has the advantages of high strength, low cost, environmental protection, energy conservation, simple and convenient process and easiness in popularization and application.

The invention relates to an amorphous alpha-olefin copolymer improved paper-based friction material and a preparation method thereof. An amorphous alpha-olefin copolymer is a saturated olefin copolymer to replace low-molecular-weight oil, a plasticizer and the like which are easy to migrate to be blended with many high polymers so as to improve the processability of the material. Especially, the improvement on the high-temperature stability and low-temperature crack resistance of the asphalt material is reported. According to the invention, APAO is introduced into a phenolic resin-nitrile rubber system to improve the fitting property of a friction plate and a pair, so that the friction coefficient is increased, and meanwhile, the low-temperature crack resistance of nitrile rubber is improved. The preparation method comprises the following steps: firstly, uniformly mixing and stirring fibers, filler and water, adding into a paper sheet former to make a paper-based friction material preform, and drying; preparing an organic solution of the amorphous alpha-olefin copolymer to dip the preform, drying, soaking the preform into a mixed solution of nitrile rubber and phenolic resin, and finally performing hot-pressing curing treatment to obtain the paper-based friction material.

The invention discloses a low-nitrogen recarburizer processing technology. According to the low-nitrogen recarburizer processing technology, a recarburizer is subjected to denitrification treatment under a negative pressure condition, so that the content of nitrogen in the recarburizer is effectively reduced; meanwhile, the recarburizer is prepared from raw materials such as petroleum coke, graphite, free carbon, asphalt, on the premise of guaranteeing the performance of the recarburizer, the manufacturing cost of the recarburizer is greatly reduced; by means of a stirring device, the problems of uneven stirring and local stirring in the current preparation process of the recarburizer are solved; a connecting rod mechanism is formed among a driven shaft, a transmission shaft and a secondrod, the second rod moves along with a first rod, and the second rod slides relatively in the transmission shaft to drive the driven shaft to rotate, so that the complexity of the moving track of a first stirring blade and a second stirring blade is increased; and the stirring range is expanded by utilizing the first stirring blade and the second stirring blade, so that no dead angle in a tank body is guaranteed, and stirring is uniform.

The invention belongs to the technical field of bridge deck pavement, and particularly relates to a gradient functional bridge deck pavement material and a preparation method thereof. The gradient functional bridge deck pavement material is prepared from the following components in parts by weight: 10 to 25 parts of pouring type asphalt cement, 75 to 90 parts of mineral aggregate, 1 to 2 parts ofsteel fiber and 0.4 to 1 part of additive, wherein the mineral aggregate comprises light aggregate, common aggregate and mineral powder, and the light aggregate accounts for 1-99% of the total mass ofthe mineral aggregate. The density difference between the light aggregate and the common aggregate and the cementing material is utilized, the paving top surface is enriched with the light aggregate,the effect of enhancing the interlayer shear resistance is achieved, the bottom surface is enriched with the common aggregate and the cementing material, and the deformation compliance is fully exerted. Meanwhile, the weight of the bridge deck pavement can be reduced by 10-60% under the condition that the thickness is not changed, or the pavement thickness can be increased by 1-3 cm under the condition that the dead load is not changed. Furthermore, the purposes of saving high-quality aggregate and protecting the environment can be achieved.

The invention belongs to the field of preparation of lithium ion battery negative electrode materials, and particularly relates to a preparation method of a lithium ion battery negative electrode composite material taking coal pitch powder as a binder and a carbon coating source. Compared with other lithium ion battery negative electrode composite materials, the method is characterized in that natural viscosity obtained after coal pitch powder is heated and melted is used as a binder, and the binder does not need to be additionally added; and the coal pitch powder is heated and melted into liquid which can naturally coat a negative electrode material, and other chemical reagents are not required to be used as solvents. According to the method, coal tar pitch is heated and melted into a liquid as a binder and a solvent, so that the matching selectivity between a chemical solvent and the binder in the traditional method is avoided, and the material consumption in the preparation processof the negative electrode composite material is reduced (the binder and the solvent do not need to be additionally added). The preparation method is a preparation method of the lithium ion battery negative electrode composite material taking coal pitch powder as a binder, a solvent and a carbon coating source.

The invention provides an SAGD (Steam Assisted Gravity Drainage) thick oil dehydration method. The method can meet the treatment requirements of asphalt oil and associated gas in small oil sand development. The dehydration process implemented by the method mainly comprises the steps of diluent mixing, oil-water separation, flash evaporation and diluent recovery. Thick oil and a diluent are mixed and then subjected to three-stage treatment including thermochemical dehydration, electric dehydration and flash evaporation, the water content of crude oil can meet the requirement of being lower than 0.3%, and the saturated vapor pressure of the crude oil is qualified. Light components obtained by flash evaporation can be recycled as a diluent after being condensed and recovered, so that the consumption of the diluent is reduced. The technological process provided by the method is flexible and compact, the occupied area is small, equipment can be repeatedly utilized, and the method has great value for rolling type development of oil sand marginal reserves.

The invention relates to a flue gas heat energy recycling system applied in a production process of bituminous concrete. The system comprises a flue gas heat energy recovering device, wherein the fluegas heat energy recovering device comprises a flue gas conveying main pipe communicating with an exhaust port, a flue gas temporary storage tank communicating with the flue gas conveying main pipe, aflue gas conveying pipeline communicating with the flue gas temporary storage tank, and a dust purification treatment device arranged on the flue gas conveying pipeline, a heat exchange oil pipe penetrates through the flue gas temporary storage tank in a through inserting mode, and a thermal insulating tank is arranged on the outer side of the flue gas temporary storage tank. According to the system, in the production process of the bituminous concrete, flue gas can be conveyed into the flue gas temporary storage tank, the flue gas temporary storage tank can relatively collect heat of the flue gas together, heat exchange oil in the heat exchange oil pipe can exchange heat with the flue gas when passing through the flue gas temporary storage tank, the heat exchange oil can be heated without additionally arranging a heating source, heat energy in the flue gas can be fully utilized, resources can be saved, and waste of the heat energy is avoided.

The invention provides an asphalt concrete construction method for preventing wind and sand by utilizing a filling height difference between a dam body and a core wall. The method is characterized inthat a certain height difference is generated by utilizing the speed of a self-filling area during dam body filling under a strong wind weather condition. Paving of the dam shell material is ahead ofpaving of the asphalt concrete core wall and a transition material, so the paving heights of an upstream dam shell material and a downstream dam shell material are higher than those of the transitionmaterial and the asphalt concrete core wall; and a dam crest construction section is changed from a plane to a concave surface, so that the asphalt concrete core wall is constructed at the bottom of the concave surface, the dam filling height and the asphalt core wall filling height synchronously rise, and a temporary wind-shield wall structure is formed. The independently researched and developedasphalt concrete construction technology for preventing wind and sand by utilizing the filling height difference between the dam body and the core wall improves the wind prevention effect of the asphalt concrete core wall under the strong wind condition and accelerates the construction progress,

The invention relates to an asphalt mortar and aggregate adhesion evaluation method. The method comprises the following steps: (1) preparing an asphalt mortar drawing test piece on a substrate; (2) curing the drawing test piece under drying and water bath conditions respectively; (3) carrying out a pull-out test on the cured pull-out test piece; and (4) obtaining the drawing strength, calculating the ratio of the drawing strength under the drying condition to the drawing strength under the water bath condition, and evaluating the adhesion between the asphalt mortar and the aggregate. Compared with the prior art, the method has the advantages that the influence of water and polishing degree on the adhesion of the asphalt-aggregate can be effectively analyzed, and the like.