10results about How to "Reduce mining" patented technology

The invention provides high-performance recycled asphalt pavement aggregate concrete and a preparation method thereof, and belongs to the field of road engineering materials. The defect that the mechanical property of the RAP concrete is reduced along with the increase of the substitution ratio is overcome, and particularly the problem that the 100% RAP concrete is insufficient in compression resistance and splitting tensile strength is solved; the mechanical property of the RAP concrete is optimized and improved by accurately matching the RAP substitution proportion, the silica fume mixing amount, the high-efficiency water reducing agent mixing amount and the preparation process.

The application discloses a kind of converter steel slag grading efficient resource utilization method, comprising the following steps: (1) converter steel slag pretreatment, liquid converter steel slag is sequentially crushed by rolling, hot stew under pressure, rod grinding and impurity removal process to obtain pretreated steel slag;(2) grading screening, pretreated steel slag is graded using a mobile five-layer vibrating screen;(3) product adaptation treatment, 16-63mm products are used as railway ballast;5-10mm, 10-15mm products are used as road asphalt surface layer aggregate;<8 mesh products are used as steel slag sand for rust removal (4) wastewater, dust treatment and metal, waste heat recovery treatment.The application greatly improves the processing efficiency, significantly enhances the stability of the product, has outstanding environmental performance, optimizes waste heat utilization and energy consumption, has high resource utilization rate and added value, and has significant social benefits.

The invention discloses a coal ash full-amount resource utilization method and a coal ash full-amount resource utilization system for realizing valuable metal extraction. The method comprises the following steps: S1, adding high-alumina coal ash, carbide slag and a composite fluxing agent into a grinding machine, grinding, mixing and screening to obtain a raw material; s2, adding the raw material and water into a press, feeding an obtained formed blank into a roller kiln, carrying out high-temperature calcination, and crushing into fine-particle clinker by a crusher; s3, the fine particle clinker and a sodium carbonate solution are added into a leaching reactor, and an obtained leaching mixed material is fed into a first solid-liquid separation device to be separated into aluminum-rich leaching liquid and aluminum extraction residues; s4, the aluminum-rich leachate and calcium oxide are added into a desilication reactor, and obtained mixed material liquid is fed into a second solid-liquid separation device to be separated into desilication aluminum-rich leachate and aluminum extraction residues; and S5, adding the desiliconized aluminum-rich lixivium and carbon dioxide into a carbon component reactor, and feeding an obtained carbon component mixed material into a third solid-liquid separation device to be separated into aluminum hydroxide and waste liquid. The method can be used for extracting Al (OH) 3 from high-alumina fly ash, and has the advantages of low energy consumption and high purity.

The invention discloses a recycled concrete slope protection brick, and belongs to the technical field of slope protection bricks, the recycled concrete slope protection brick comprises a brick body, the brick body is formed by pressing and curing a recycled concrete raw material, a permeable vegetation structure is integrally formed on the brick body, the permeable vegetation structure comprises a first planting cavity and a second planting cavity, and a vegetation card is poured on one inner wall of the permeable vegetation structure; a receding groove is formed in the position, corresponding to the vegetation clamp, of the lower surface of the brick body, the lower end of the vegetation clamp extends into the receding groove, and the inner wall, opposite to the vegetation clamp, of the water-permeable vegetation structure is designed to be of a downwards-concave inclined face structure. The recycled coarse aggregate and the recycled fine aggregate which are prepared by crushing and screening construction waste are adopted as main raw materials, a large amount of construction solid waste can be consumed, natural gravel exploitation is reduced, energy consumption and environmental pollution are reduced, a large-volume water-permeable vegetation structure is integrated in the brick body, rapid infiltration of rainwater can be achieved, the elastic vegetation cards are embedded in the brick body, and the brick body can be recycled. When vegetation is planted, the vegetation can be automatically and elastically clamped, and the vegetation is prevented from being washed off by rainwater or water flow.

This invention discloses a cement concrete pavement structure for use in vehicular roads, relating to the field of road construction technology. The cement concrete pavement structure includes: a subbase layer composed of graded steel slag; an intermediate base layer composed of cement-stabilized steel slag; a sand cushion layer composed of sand; and a surface layer composed of cement concrete. The subbase layer, intermediate base layer, sand cushion layer, and surface layer are laid from bottom to top. The subbase layer is laid on the roadbed, the intermediate base layer is laid on top of the subbase layer, the sand cushion layer is laid on top of the intermediate base layer, and the surface layer is laid on top of the sand cushion layer. This invention provides a cement concrete pavement structure that can improve the strength of the pavement structure and environmentally treat waste steel slag, thereby improving resource utilization.

The present application relates to the technical field of aluminum alloy production and processing, and particularly relates to an easily-extruded high-strength corrosion-resistant aluminum alloy, a manufacturing method thereof and an application thereof. The present application realizes the purpose of improving the material performance by using a higher Zn element while ensuring the corrosion resistance of the material by reasonably adjusting the proportion of Mg, Si and Zn elements. This method can not only improve the strength of the aluminum alloy, but also improve its corrosion resistance, thereby solving the problem of adding a large amount of alloy elements in the prior art, reducing the production cost and the difficulty of alloy element recovery. By controlling the alloy composition and the total aluminum content, the present application ensures that the extrusion deformation resistance of the aluminum alloy is small, has excellent extrudability, and controls the content of some elements to reduce the quenching sensitivity, so that the alloy can produce more complex thin-walled section shapes. The aluminum alloy material of the present application can still maintain good corrosion resistance in a high-humidity and high-salinity environment.

The invention relates to a static sintering process and system for preparing high-whiteness and high-purity aluminum hydroxide, and the static sintering process comprises the following steps: firstly, taking a raw material crushed to process control fineness as a pre-powder material, carrying out raw material preparation and blank forming on the pre-powder material to obtain a blank, sintering the blank to obtain clinker, carrying out clinker dissolution on the clinker to obtain slurry, and sintering the slurry to obtain the high-whiteness and high-purity aluminum hydroxide. Carrying out slurry desilication, carbon component reaction, hydrogen-aluminum separation and drying on the slurry to prepare high-whiteness and high-purity aluminum hydroxide; wherein the raw materials comprise solid wastes such as fly ash; the blanks are sintered into six polygon prism-shaped blanks which are stacked in two rows and three groups, the blanks are roasted in an industrial tunnel kiln in a temperature programming mode, and the roasting temperature ranges from 800 DEG C to 1100 DEG C. According to the invention, solid wastes such as fly ash, coal gangue, carbide slag and the like, pulverized coal and sodium carbonate are crushed into materials with the same fineness, high-whiteness and high-purity aluminum hydroxide can be obtained through an alkaline static sintering process, the recovery rate of aluminum in the solid wastes is about 90%, and harmless, resource and synergistic utilization of the solid wastes such as fly ash and the like is realized.

The invention relates to a raw material preparation method for preparing high-whiteness and high-purity aluminum hydroxide by using solid waste, which comprises the following steps: pretreating, proportioning and homogenizing raw materials to obtain a homogenized raw material, and the raw materials comprise fly ash, coal gangue, pulverized coal, calcium-containing solid waste and sodium carbonate; wherein the pretreatment comprises the following steps: crushing the raw materials, and controlling the crushing granularity of the process to be 120-220 meshes to form pre-powder; the batching comprises the steps of metering the pre-powder according to a process ratio, and batching to form a raw material; the homogenization comprises high-speed dry homogenization and low-speed wet homogenization, the raw material is firstly added into a high-speed dry homogenization machine for high-speed dry homogenization, and then the raw material is subjected to low-speed wet homogenization to obtain a homogenized raw material. According to the invention, solid wastes such as fly ash, coal gangue, carbide slag and the like, pulverized coal and sodium carbonate are crushed, a fully and uniformly mixed homogenized raw material is obtained through microcomputer metering automatic batching accurate control, dry homogenization and wet homogenization treatment, high-whiteness and high-purity aluminum hydroxide can be prepared through a self-heating blank sintering method, and resource utilization of fly ash is realized.

The utility model relates to the technical field of biological deodorization, and discloses an efficient intelligent biological deodorization and waste water resource recycling system which comprises a water tank, and a deodorization bin is fixedly installed on the right side of the top end of the water tank. According to the efficient intelligent biological deodorization and waste water resource recycling system, the key problem that traditional biological deodorization waste gas is difficult to uniformly contact with microorganisms is solved by adopting a staggered distribution structure of the filler plates in the deodorization bin, and in a biological filtration link, malodorous gas can uniformly and stably flow between the filler plates, so that the biological deodorization effect is improved. The device effectively avoids the appearance of an area with too fast or too slow flow velocity, enables the gas to be in full contact with microorganisms in the filler, greatly prolongs the retention time of the waste gas, further remarkably improves the decomposition efficiency of the microorganisms on malodorous substances, and can further irradiate the waste gas to achieve the deodorization and sterilization effects due to the design of the ultraviolet lamp. And the deodorization effect is qualitatively improved.

This invention relates to the field of building materials, and more particularly to a conductive concrete using gold tailings sand as the sole aggregate and its preparation method. The conductive concrete comprises: gold tailings sand, zero-dimensional conductive filler, one-dimensional conductive filler, inorganic cementitious material, fly ash, surface modifier, and water; and the gold tailings sand is rationally graded. The preparation method includes: mixing the zero-dimensional conductive material and water, and ultrasonically dispersing them; mixing the dispersed one-dimensional conductive material and the aqueous dispersion of the zero-dimensional conductive material, adding the surface modifier, and ultrasonically dispersing to obtain a conductive material dispersion; mixing the inorganic cementitious material, fly ash, and gold tailings sand to obtain a mixed dry material; and mixing the conductive material dispersion and the mixed dry material to obtain the conductive concrete. This invention uses gold tailings sand as the sole aggregate for conductive concrete, combined with the synergistic design of zero-dimensional and one-dimensional conductive fillers, which can effectively improve the conductivity of the conductive concrete.