10results about How to "Reduce stockpiles" patented technology

The invention relates to a wing connection device for connecting an outer wing to a central wing and comprising a triple joint comprising a first joint, a second joint and a third joint, wherein the first joint is fixed to a central wing rear spar of the central wing, the second joint is fixed to an outer wing rear spar of the outer wing and the third joint is fixed to a docking rib web of the outer wing, and a rear strut plate fixed to a rear spar frame of the central wing. In this way, by fixing the rear strut plate to the rear spar frame of the central wing, the load from the outer wing can be spread, so that the stress level is reduced, the structural efficiency is improved and the deformation of the connection structure is reduced. For example, the rear strut plate spreads the upward load and spreads the load to the fuselage frame and via the fuselage frame to the fuselage. The invention also relates to an aircraft comprising such a wing connection device and to a method of connecting wings.

The utility model discloses an industrial waste residue composite cementing material preparation system which comprises a first calcining furnace, a kaolin feeding hole and a bauxite feeding hole are formed in the first calcining furnace, the first calcining furnace is connected with a first mixing kettle, and a coal ash feeding hole and a 10% sodium hydroxide solution feeding hole are formed in the first mixing kettle; the outlet end of the second calcining furnace is connected with the inlet end of the dehydrating tower, the outlet end of the dehydrating tower is connected with the inlet end of the second calcining furnace, the second calcining furnace is provided with a sodium dihydrogen phosphate feed port and a urea feed port, and the second calcining furnace is connected with the second mixing kettle; the second mixing kettle is provided with a red mud feeding hole, a coal gangue feeding hole, a metallurgical slag feeding hole and a glass water feeding hole; and the second mixing kettle is sequentially connected with the air furnace, the grinding kettle and the finished product bin. According to the utility model, the stockpiling of industrial solid wastes can be reduced, the environmental pollution can be effectively reduced, and the problem of infrastructure material shortage can be effectively relieved on the premise of ensuring the engineering quality.

This invention discloses a method for the comprehensive utilization of sulfide tailings, relating to the field of sulfide tailings treatment technology. This method uses lead-zinc tailings as raw material and innovatively employs a combined "two-stage acid leaching-gravity separation-flotation" process. First, two stages of acid leaching selectively leach calcite associated with barite in the tailings, reducing the influence of muddy calcite while activating pyrite. Subsequently, the acid leaching residue undergoes gravity separation to further separate undissolved calcite, quartz, and other silica-containing gangue minerals. The gravity concentrate is then subjected to flotation to achieve the separation of barite and pyrite, ultimately obtaining high-purity barite and pyrite products respectively. This invention features a reasonable process route and simple operation, effectively solving the separation problem of fine-grained, high-viscosity lead-zinc tailings, achieving full-component purification and utilization of lead-zinc tailings, significantly enhancing the economic value of tailings resources, and reducing the environmental pressure caused by tailings stockpiling, thus demonstrating good economic, environmental, and social benefits.

This invention relates to the field of iron ore beneficiation technology and discloses a method for preparing efficient roasting and separation of refractory iron ore, comprising the following steps: S1, raw material pretreatment and pre-enrichment: refractory weakly magnetic iron oxide ore is crushed, and a dry separation method is used to pre-remove some low-grade waste rock to obtain pre-enriched rough concentrate; S2, intelligent grinding and drying; S3, magnetized roasting; S4, rapid quenching and stabilization of roasted ore. This invention, through rapid cooling (quenching) combined with an atmosphere protection process, stabilizes and solidifies the magnetism of the magnetized roasting product—magnetite—avoiding magnetic loss due to subsequent processing, providing a high-magnetic, stable feed for subsequent weak magnetic separation operations, which is a prerequisite for ensuring a high magnetic separation recovery rate; through strong magnetic separation to ensure recovery rate, combined with intelligent flotation to improve concentrate grade, a deep cleaning process is formed, achieving refined separation of complex roasting products, maximizing both the total iron metal recovery rate and concentrate grade simultaneously.

The application discloses a method for preparing arsenic-cadmium alloy by using arsenic-cadmium acid waste liquid, and belongs to the technical field of wastewater treatment. The application realizes the selective precipitation of arsenic and cadmium in the form of Cd5H2(AsO4)4.4H2O with high purity and complete crystal form by precisely controlling the molar ratio of cadmium to arsenic in the waste liquid to be 1.2-1.6 and adjusting the pH of the precipitation to be 4-6, thereby realizing the deep removal of the two toxic elements of arsenic and cadmium, and the removal rate of arsenic can reach more than 96.70%, and the process flow is greatly reduced. The Cd5H2(AsO4)4.4H2O-based precipitation slag is converted into high-purity arsenic-cadmium alloy by carbon thermal reduction, the amount of slag is greatly compressed, and the storage and landfill of waste materials are significantly reduced. The alloy can be further used to prepare downstream products such as semiconductor materials as a high-value-added product, realizes the high-value conversion from harmful waste to high-end raw materials, and has remarkable green disposal and resource utilization benefits.

This invention provides a composite cementitious material with high rheological properties, its preparation method, and concrete, comprising an active admixture, 40%–60% ordinary Portland cement, 20%–35% modified marble powder, and 0.8%–2% functional admixtures. The modified marble powder is obtained by surface modification treatment of marble powder with a silane coupling agent and a polycarboxylate superplasticizer, effectively solving the problem of marble powder agglomeration and ensuring uniform dispersion in the cementitious system. This significantly optimizes the rheological properties of the paste, improving fluidity and pumpability. The synergistic effect of cellulose ether and air-entraining agent in the functional admixtures further enhances the material's water retention and anti-segregation stability. The cementitious material prepared by this invention possesses both excellent mechanical properties and durability, and the concrete prepared with it exhibits good workability, dense structure, and reliable long-term performance. Simultaneously, this technology achieves high-value-added resource utilization of marble waste, reduces cement consumption and carbon emissions, and aligns with the direction of green building materials and sustainable development.

The invention discloses a composite adhesive for sintered return mine cold-bonded pellets and application of the composite adhesive. The composite adhesive is prepared from liquid sodium silicate, pre-gelatinized cassava starch and defective glass fibers which are sintered, returned and ground on the basis of the total mass of a ball pressing mixture, the application method comprises the following steps: grading and blending sintered return mine according to the grading index, shearing and grinding the sintered return mine and defective glass fiber in a cylindrical rotary drum by utilizing the characteristics of high hardness and sharp edge of the sintered return mine, then mixing the rest of adhesive and water to prepare a ball pressing mixture, and drying and solidifying for 4 hours by utilizing sintering / ring cooling flue gas after performing compression molding by using a pair of rollers at 30MPa. Through the synergistic effect of sodium silicate, cassava starch and glass fiber, the green pellet drop strength is larger than or equal to 5 times / P, the dry pellet compressive strength is larger than or equal to 2200 N / P, and the alkali metal content is smaller than 0.4%; meanwhile, resource utilization of sintering return mine, defective glass fiber and industrial waste gas is achieved, the method is compatible with existing steel equipment, the cost is controllable, the method is suitable for large-scale industrial production, and green and low-carbon transformation of the steel industry is promoted.

The invention relates to the technical field of electrolytic aluminum solid waste resource utilization, in particular to a method for preparing aluminum fluoride from electrolyte lithium extraction tailings. The invention provides a method for synergistically recovering aluminum and fluorine resources in tailings generated after lithium extraction of an electrolytic aluminum lithium-rich electrolyte. The method comprises the following steps: firstly, leaching the lithium extraction tailings by adopting a hydrochloric acid-aluminum chloride system, so that aluminum and fluorine enter a solution in the form of a fluorine-aluminum complex to obtain a fluorine-aluminum solution; secondly, impurity removal treatment is conducted on the fluorine-aluminum solution, impurities such as silicon, iron, phosphorus and calcium are removed by regulating and controlling the pH value and adding a precipitator, and a purified solution is obtained; finally, hydrofluoric acid is supplemented into the purified liquid, and the anhydrous aluminum fluoride product with the high additional value is prepared through concentration, crystallization and calcination. The method is reasonable in process, efficient resource utilization of complex fluorine-containing and aluminum-containing solid waste is achieved, the aluminum and fluorine recovery rate is high, the product purity is high, and a new technical approach is provided for solving the electrolytic aluminum solid waste treatment problem and constructing a circular economy industrial chain.

This invention discloses a discrete element method for simulating the micromechanics of concrete using coal gangue as an alternative aggregate, belonging to the field of geotechnical engineering and discrete element numerical simulation technology. The method includes: generating an initial set of spherical particles and constructing a homogeneous equilibrium sample; applying prestress through servo feedback to achieve equilibrium; importing a real crushed stone STL model to generate an irregular Clump template, proportionally replacing the spheres in situ with coal gangue and natural aggregate Clumps; employing a parallel bonding model and assigning differentiated mechanical parameters, then randomly reducing the strength of some contact bonds proportionally to simulate micro-defects; performing uniaxial compression loading, simultaneously monitoring the stress-strain curve, and tracking microcrack evolution based on DFN. This invention significantly improves the accuracy of the simulation through irregular aggregate reconstruction, differentiated parameter assignment of multi-material components, and a random weak contact algorithm, realistically reproducing the mechanical response and failure mode of permeable concrete made from coal gangue, providing a reliable numerical tool for the resource utilization of solid waste.