56results about "Solid waste management" patented technology

The invention essentially relates to a filter material for treating sewage, in particular to relate to a filtering material used in the sewage process technique of aeration biology filtering pool. The filtering material of sewage process of the aeration biology filtering pool is characterized in that the components of the raw material of the filtering material consists of by fly ash of 60 to 75 percent, portland cement of 10-20 percent, quick lime of 10-20 percent, gypsum 3-5 percent and degreasing aluminum powder of 0.06-0.08 percent. The preparation includes the following steps of pulping, stirring, pouring, cutting forming and ball milling. Under the optimal proportion of the air and water and the optimal water force load, the life sewage is treated by the aeration biology filtering pool with adding the fly ash to the gas concrete particle. When the average concentration of the water inlet is 176mg/L, the average removal rate of the CODis 75.3 percent, the average concentration of water inlet is 42.7mg/L, the average removal rate of the NH3-N is 96.4 percent, the average concentration of the water outlet is 0.87mg/L which meets the GB18918-2002 grade A standard of the sewage discharging.

The invention belongs to the field of building material, which more particularly relates to a preparation method and application of a mineral admixture with high activity that takes wasted concrete as raw material. The preparation method of the mineral admixture with high activity comprises the following steps: (1) the wasted concrete is collected, the sundries are removed, and crushing equipment is used for processing concrete blocks into particle with diameter of being distributed in 2 to 40mm as recycled aggregate; (2) grinding or crushing equipment is used for striping and exfoliating the cement paste attached on the surface of the recycled aggregate, thus separating the formed powder with hardened cement stone and having diameter of 0.05 to 1mm to be the raw materials of the mineral admixture with high activity; (3) powder preparation equipment are used for processing the raw material further into superfine powder with Bertrand rate surface area not less than 600m<2>/Kg, that is the finished products of mineral admixture with high activity. The preparation method and application of a mineral admixture with high activity that takes wasted concrete as raw material has the advantages of good economy, high performance price ratio, large marketing need, good environmental protection and economy benefit, which has wide prospect for generalization and application.

The invention discloses a check fire valve for a flue, comprising a lampblack channel comprising an outer casing. The lampblack channel is provided with an air inlet and an air outlet which are opposite to each other; two oppositely arranged valve plates are arranged in the lampblack channel; and are rotatablely arranged in the lampblack channel through a valve plate rotation shaft; a blocking body causing the two valve plates only to be opened towards the direction of the air outlet is arranged at one end near the air inlet in the lampblack channel; a connecting strip lengthways arranged to separate the air inlet to two parts is arranged at the side near the air inlet in the lampblack channel; the valve plate rotation shaft is arranged close to the connecting strip; and the side face of the connecting strip facing to the air outlet is provided with a high-temperature closing device which can enable the valve plates to be forcibly closed. The invention has good lampblack removing effect, can not impede the smoothness of public flues, and can be forcibly closed when temperature of flue gas in the public flues is in a high exigent condition.

The invention relates to a fluid construction mixture comprising a sludge or tailing material (such as a dredged material), a binder, a binder retarding agent, optionally one or more other ingredients. The invention further relates to a method for preparing a solid construction material and to the use of construction material in infrastructural projects.

The invention provides a method for preparing vegetation form porous concrete, adopting the 'pre-coating' technology, a slurry body with specific compositions coats coarse aggregates to form a sphere with a relatively uniform particle diameter, based on the physical coacervation of the sphere and the agglutination of the surface slurry body of the sphere; and the porous and macroporous structure, the cementation between solid phases of which is good and gas phases of which are communicated, is formed. The method comprises the concrete preparation steps that: (1) the fluidity and the viscosity range of the slurry body used to coat the aggregates are determined, and the mixing ratio is worked out by an absolute volume method; (2) the four-step stirring working procedure and the shaping model of the combination of the vibration and the pressuring are adopted; and (3) hole spaces are subjected to alkali-sealing treatment. The invention solves the difficult problems existing in the prior method that because of the downflow of the slurry body, the distribution of the pore spaces is not uniform and the discontinuous pore spaces increase, and the alkalinity in concrete pore spaces is relatively high, which are adverse to the growth of plants. When the vegetation form porous concrete prepared by the method of the invention is applied to road shoulder separator inserts, construction roofs, protection banks and protection slopes and parking lots of a highway, and good landscape effects and ecological environmental protection significance are achieved.

Syntactic foams and thermal insulation as described containing epoxy resin, hollow microspheres, and dried sol-gel or fumed metal oxide for forming a thermal insulating layer on a substrate such as a pipeline. Methods for forming such thermal insulating layers are also described, which can include formulating with blowing agents for forming closed cells in the finished insulating foam.

The invention relates to a magnesium calcium fire-proof plant fibre board and the preparation method thereof, and consists of 1 to 2.4 parts of abio-glue gelled material, 1.5 to 2.5 parts of plant fibres, 0.025 to 0.03 parts of cymene sodium silicate and 1.4 to 1.8 parts of stirring liquor. The invention adopting the method of heat pressing the half dry feed comprises the steps of preparation of material, stirring of the mixture feed, paving and pre-pressing, heat pressing and moulding and incising with fixed size. The products not contain formaldehyde and has the advantages of environmental protection, no poison, harm and crack, light weight and heat preservation, shrinking and small swelling modulus. The invention has good fire-proofing, water-proofing, antisepsis, moth-proofing, and weathering resistance, thereby thoroughly eliminating abuse reversing salting of the magnesium products. Moreover, the invention has the characteristic of the abio-material and combines the characteristics of wood including fine texture, strong natural tactile sensation, easily planning, cutting, fixing and sticking. The invention which has simple production technique and fast shaping speed needs not to be preserved and aired and has high intensity of breaking resisting and even density and not distort. The invention is applicable to the industries such as constructional material, package, transportation, decorating, etc.

The invention relates to a high-temperature resistant heat insulating material using vermiculite as a main raw material and a method for manufacturing the same, which belong to the field of heat insulating materials. The method is characterized by comprising the following steps: firstly, quickly heating and swelling commercially available primary minerals of the vermiculite with large, medium and small diameters at a temperature of between 500 and 900 DEG C; secondly, mixing the swelled vermiculite with an aluminum dihydrogen phosphate bonding agent, aluminum hydroxide or rho-alumina, and nano-silica according to the requirement of weight percentage; stirring the mixture evenly in an airtight stirring machine and then filling the mixture into a die; after prepressing, performing hot pressing and shaping on the mixture; and after discharging, finishing the product properly to obtain the high-temperature resistant heat insulating material using the vermiculite as the main raw material. Through grain composition, density control, addition of the nano-silica and application of the high-temperature resistant bonding agent, and using small grained primary minerals of the vermiculite with large yield and low cost, the high-temperature resistant heat insulating material and the method solve the bottleneck problems of insufficient supply of large grained primary minerals of the vermiculite, and the improvements on the strength and the service temperature of the vermiculite heat insulating material at the same time, thus the material can keep a low coefficient of thermal conductivity under a high temperature condition.

The EAFD stabilizer for returned concrete and mixer drum wash water includes various methods of using EAFD as a stabilizer in making concrete. The potentially hazardous stockpile of EAFD can be used in practical construction, which has a positive impact on the environment. A certain amount of EAFD is added to cement being mixed or to wash water and acts as a stabilizer, the wash water being used to make a cement mixture. This resultant EAFD stabilized concrete mixture stabilizes overnight.

The invention discloses a comprehensive utilization treating method for aeroconcrete waste materials. Firstly, drying the aeroconcrete waste materials, then mixing the aeroconcrete waste material with anhydrite or dihydrate gypsum according to a certain mass percentage ratio after calcining, grinding the mixture in a ball mill to prepare an expansive agent, evenly mixing the expansive agent with silicate cement to prepare expansive cement, calcining the aeroconcrete waste materials in high temperature, grinding the waste materials in the ball mill into a powder lot with specific surface area of 300-400g/cm2, thereby obtaining gelled materials, using the powderlot quantity of 50-150kg per cubic meter as fillers to replace lime or dense concrete filled with lime. The treating method of the invention has the advantages of simple technology, no secondary pollution, being applicable for commercial process, making more full use of aeroconcrete waste materials, and changing waste into valuable.

The invention discloses a cement mortar. The cement mortar comprises, by mass, 50 to 80% of an electromagnetic wave shielding material, 15 to 45% of cement, 1 to 4% of a filling material, 0 to 0.5% of fiber and 0.1 to 2% of an organic additive. The cement mortar has an electromagnetic wave shielding function and exerts high shielding effect on electromagnetic waves with a frequency of 10 KHz to 18 GHz. The cement mortar provided by the invention has building performance parameters similar to the building performance parameters of common plastering mortar, can be applied to manufacturing of floated coats of interior and exterior walls of a variety of buildings and be smeared by using common construction means, and is convenient to apply and reliable in performance.

To provide a cement manufacturing apparatus and the like capable of increasing quantity of fly ash used in the apparatus while controlling unburned carbon content in cement within a permissible range. The cement manufacturing apparatus and the like comprises a removal means for removing unburned carbon from gypsum, and a grinding means for grinding gypsum from which unburned carbon is removed by the removal means together with clinker to generate cement. With the apparatus, total unburned carbon content in cement can be reduced, and the quantity of fly ash used in the apparatus can be increased by the reduced amount of unburned carbon. The removal means can remove unburned carbon contained in gypsum as well as unburned carbon contained in fly ash, and the grinding means may grind the fly ash from which unburned carbon is removed together with the gypsum, from which unburned carbon is removed, and clinker. The removal means may simultaneously remove unburned carbon contained in gypsum and unburned carbon contained in fly ash.

The invention provides a grinding aid material for improving the fluidity of fly ash, and a use method thereof. According to the present invention, the grinding aid material is prepared from a surfactant and polyacrylamide; the grinding aid material is dissolved in water to prepare a grinding aid material aqueous solution, and the grinding aid material aqueous solution is sucked out of a containerby using a high pressure water pump, is introduced into a mill, and is completely mixed with fly ash, such that the grinding aid material can be attached to the surface of the fly ash particles to form a film layer, and the fluidity of fly ash concrete can be improved by using the lubricating effect on the fly ash spherical particles after the dissolving of the film layer when the fly ash and cement are mixed; and the grinding aid material has advantages of extremely low consumption, extremely low cost and convenient use.

The invention relates to a novel cement composition and a concrete composition using the cement composition. In the engineering construction, the compositions avoid the harm produced by a great amount of air, and can prevent drying shrinkage and increase the compressive strength; and due to the existence of a little amount of Fe powder, the phenomena of concrete cracking, ageing and the like are overcome, the service life of the concrete is prolonged, and the properties of the concrete such as delayed coagulation, chemical corrosion resistance, freeze protection and the like can also be achieved.

The invention provides anti-crack impervious concrete, belonging to the technical field of building materials. The anti-crack impervious concrete comprises the following components in parts by mass: 200 to 300 parts of cement, 100 to 150 parts of coal ash, 950 to 1100 parts of gravels, 850 to 1050 parts of sand, 0.5 to 1 part of nanometer inorganic oxide, 0.5 to 1 part of nanometer zinc oxide, 6 to 12 parts of an additive, 1 to 3 parts of a self-repairing agent and 155 to 170 parts of water. According to the invention, the nanometer inorganic oxide, the nanometer zinc oxide, the additive and the self-repairing agent are used as main raw materials, the small-size effect, the surface interface effect, the self-repairing effect, the surface energy condition technology and the like of nanomaterials are used for improving and optimizing the pores and compactness of the concrete, and water is blocked through self-repairing to repair cracks; a hydration heat release rate and pore solution surface energy are reduced by inhibiting moisture evaporation of a concrete mixture in condensation and hardening, so the volume stability of the concrete is maximized; and finally, self-repairing is conducted on cracks which possibly occur. Therefore, the concrete has crack resistance and impermeability in a full-period range, and the durability and the structural safety of the concrete are improved.

Fire-retardant powder comprising at least 30% by weight of Lewis acid, at least 5% by weight of alkaline bicarbonate, and at least 3% by weight of silica, and method of manufacturing such fire-retardant powder. A building material preferably comprising natural fibers and comprising at least 5% by weight and at most 30% of such powder.

The invention discloses an interfacial agent for binding vitrified tiles and a construction method thereof. The bound vitrified tile can not easily bulge or shed. The interfacial agent for binding vitrified tiles is prepared by mixing the following substances in parts by weight: 15-25 parts of expanded perlite, 65-75 parts of cationic emulsion and 5-15 parts of wood fiber, wherein the expanded perlite is an inorganic vitrified hollow microporous material, and the cationic emulsion is a cationic synthetic resin emulsion for mixing cement mortar. The cationic emulsion having favorable binding action with the vitrified tiles is used as the binding component of the interfacial agent, the expanded perlite is added to enhance the water absorptivity of the interfacial agent, and the wood fiber is added to enhance the binding action of the interfacial agent. The interfacial agent according to the proportion can not easily bulge or shed from the wall or ground after the vitrified tiles are laid on the wall surface or ground, thereby having favorable construction effect.

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 discloses a wave-absorbing breathable environment-friendly molding. The wave-absorbing breathable environment-friendly molding is prepared from the following raw materials in parts by weight: 5 to 9 parts of calcium borate, 55 to 65 parts of high-strength gypsum, 14 to 18 parts of fibrilia, 6 to 8 parts of polyester fiber, 10 to 16 parts of adsorbed filled earth, 1 to 2 parts of terbium oxide, 1 to 2 parts of iron oxide, 8 to 12 parts of inorganic filler, 10 to 14 parts of flame retardant additives and 12 to 18 parts of an adhesive. The wave-absorbing breathable environment-friendly molding disclosed by the invention has the excellent characteristics of good wave-absorbing effect, light quality, high mechanical strength, breathability and no cracking; in addition, the molding has the advantages of smooth surface, good toughness and impact resistance, the function of adsorbing harmful substances in the air, and relatively-excellent flame retardancy and dimensional stability; meanwhile, the preparation method disclosed by the invention has the advantages that the low cost of materials is relatively low raw materials are easy to obtain, and the process is simple; the molding for decoration has a relatively-high practical value and a good application prospect.

The invention relates to a preparation method of an insulating brick containing plant straws. The preparation method is characterized in that the insulating brick is produced from the raw materials in parts by weight: 70-80 parts of the plant straws, 13-25 parts of magnesium hydroxide and 5-10 parts of isocyanate and comprises the steps: crushing the plant straws to obtain crushed plant straws with the fiber length of 5-10mm, drying the crushed plant straws until the moisture content is 8 percent according to the weight percentage, weighing the plant straws according to the parts by weight, adding the magnesium hydroxide and the isocyanate as a binder according to the parts by weight, carrying out mixing and burdening, then carrying out prepressing with the precompression of 500 tons, then carrying out compression molding with the die pressure of 1.2 kilotons, heating to 110 DEG C by virtue of a high-frequency electromagnetic induction method, and carrying out hot pressing for 3-6 minutes to form the insulating brick. According to the production method disclosed by the invention, with the plant straws as main raw materials, the produced insulating brick has a good fireproof performance without needing secondary insulation; in addition, the insulating brick is rapid in construction, has a favorable anti-seismic effect and has the shock strength according with the stipulations of a national standard in wall materials.

The invention relates to a method of using sludge neutralized by steel pickling wastewater to prepare a yellow soil parent material and belongs to the technical field of steel pickling wastewater treatment. The method is characterized by including: pumping the steel pickling wastewater into a pipeline mixer, adding lime slurry adjusting mortar for mixing, press-filtering after mixing, and adding weathered coal containing humic acid into a sludge filter cake while stirring, wherein a mass ratio of the sludge to the weathered coal is 5:1-2; adding fly ash after stirring well to form sludge particles to obtain the artificial iron oxide based yellow soil parent material, wherein a mass ratio of the sludge to the fly ash is 10:1-3. The invention further relates to application of the yellow soil parent material. The yellow soil parent material can serve as heavy metal adsorbent, gas desulfurizer, backfill of building projects and soil conditioner. The method has the advantages of simple process, convenience in operation, easiness on control, low processing cost, wide application range, high consumption and recycling of waste.

The invention discloses a plant fiber fireproofing silencing plate which comprises a plant fiber plate and a cover, wherein the plant fiber plate is manufactured by the following processes: A, manufacture plant fiber into plate blanks by paving process, wherein the density of each plate blank is 0.10-0.12g/cm3; B, immersing the plate blank into inorganic cementing slurry for soaking for 5-10 minutes, wherein the mass percent concentration of the inorganic cementing slurry is 50-70%, and the inorganic cementing slurry is composed of magnesium chloride, magnesium oxide and water; C, delivering the soaked plate blanks into a roller press for rolling, wherein the density of the pressed plate is 0.4-0.6g/cm3; and D, conducting curing and drying and solidification and facing cutting on the rolled plates to manufacture the rolled plates into plant fiber plates. Due to the adoption of the production process, the plant fiber fireproofing silencing plate not only has the characteristics of being light in weight, anti-corrosion, easy to machine, and low in cost, but also increases the fireproofing function and enhances the strength of the plates; and due to the control on the density of the fiber plate, the silencing effect of the plates can be greatly improved.

The invention discloses a sleeve grouting material for steel bar connection of a prefabricated building. The sleeve grouting material is prepared from the following components in parts by weight: 700to 900 parts of cement, 80 to 150 parts of waste concrete active micro powder, 800 to 1100 parts of quartz sand, 10 to 90 parts of composite fiber and 30 to 110 parts of an additive, the waste waste concrete active micro powder is prepared through adopting a special physical-chemical combined activation technology, so that the mechanical strength of the sleeve grouting material is obviously improved, and the fluidity of the grouting material is improved.