60results about How to "Alleviate resource pressure" patented technology

The invention discloses a method for second mining a mining-stopping line coal column in a super thick coal layer. The method comprises the following steps that (1), positions of a coal column second mining working surface transporting gate trough and a rail gate trough are stimulated; (2) comprehensive probing is conducted on an original working surface goaf area where the super thick coal layer mining-stopping line coal column is located, and potential safety hazard is removed; (3) a roadway in the propelling direction of the coal column second mining working surface is dug at the upper part of the super thick coal layer, and the roadway is filled; (4) a coal column second mining working surface mining returning roadway and a affiliated oblique roadway are dug, so that the coal column second mining working surface mining returning roadway and the affiliated oblique roadway form a completed producing system, and the coal column second mining working surface is arranged; (5) a bottom plate of the roadway is drilled from top to bottom for using as a filled pipeline; (6) filling paste is prepared, the filling paste is evenly injected into one side, close to the original working surface goaf area, of the transporting gate trough along the filled pipeline; and (7) comprehensive mining is conducted on the coal column second mining working surface. According to the method for second mining the mining-stopping line coal column in the super thick coal layer, the compressed coal amount is reduced, waste of coal resources is avoided, the economic benefits of enterprises are improved, and the service life of mines and mining areas is prolonged.

The invention discloses a C60 full-manufactured sand super high-rise pump concrete, which comprises the following raw materials by metering with mass in every cubic centimeters of concrete: 312-355kg of cement, 110-135kg of ore powder, 80-110kg of fly ash, 660-723kg of manufactured sand, 960-1027kg of cobblestone, 10.4-12.2kg of additive and 150-163kg of water. The concrete is characterized in that the fine aggregate employs the manufactured sand, the doping amount of industrial by-products of fly ash and ore powder exceeds 35%, 28 compressive strength can reach more than 70MPa, collapsed slump is greater than or equal to 240mm, the expansion degree is greater than or equal to 600mm, and slump cone falling time is less than or equal to 10s, so that pumping requirement of the super high layer(vertical height is greater than or equal to 200m) can be completely satisfied, natural sand resource pressure can be alleviated at certain degree, and the concrete provides the technical reference for preparing the full-manufactured sand super high-rise pump concrete.

The invention belongs to the field of solid waste resource utilization, and relates to a sub-molten salt method for totally recycling vanadium, tungsten and titanium from a waste denitration catalyst. The sub-molten salt method mainly comprises the processes of pretreatment, sub-molten salt leaching, titanium dioxide recycling, lixivium cyclic utilization, calcification sedimentation, vanadium and tungsten separation, calcium removing, vanadium removing and the like. Compared with the prior art, a sub-molten salt treatment process is adopted, reaction energy consumption can be effectively reduced, green recycling and zero exhaust gas emission can be achieved, and the recycling economic value can be increased; and meanwhile, the recycling treatment process is simpler and easier to operate, waste residues and waste liquid in the process are fully recycled, economic input is reduced, and secondary pollution is prevented from being generated to the environment.

The invention discloses a novel substrate for simple roof greening by applying greening wastes and a preparation method thereof. The novel substrate for simple roof greening is prepared from greeningwaste decomposed compost, grass carbon, volcanic rock and vermiculite. The preparation method comprises the following steps: selecting the greening waste decomposed compost with a particle size of less than 5 mm, and mixing the greening waste decomposed compost with the grass carbon, the volcanic rock and the vermiculite according to a volume ratio of (40-70%): (0-25%): (18-36%): (12-24%). The novel substrate provided by the invention fully utilizes nutrient supply properties of the greening wastes, water-retaining and nutrient-retaining properties of the vermiculite and stability and root-fixing properties of the volcanic rock, provides good growth conditions for a plant in the aspects of water, nutrients, air and heat, and meets the needs of simple roof greening for plantation and growthof the plant; meanwhile, physical and chemical property indexes of the substrate all meet the requirements of simple roof greening; and the novel substrate provided by the invention replaces a grasscarbon substrate with urban greening wastes, so waste is turned into treasure; a novel way for treatment of the urban greening wastes is opened up; the usage amount of grass carbon resources is reduced; the cost of the substrate is lowered; and sustainable development of resources and the environment can be easily realized.

A method for producing hydrogen by recycling a waste lithium ion battery positive electrode material in combination with electrochemistry comprises the steps of (1) ball-milling, sieving and drying the waste positive electrode material to obtain recycled powder of secondary agglomerated particles of the waste positive electrode material; (2) mixing the recycled powder of the secondary agglomeratedparticles of the waste positive electrode material with a conductive agent and an adhesive, coating and drying to obtain a pole piece; (3) taking the pole piece as a positive electrode and an inert electrode as a negative electrode, and charging in an electrolyte solution; (4) after the reaction is finished, collecting primary particles of the waste positive electrode material on the positive electrode plate; and (5) mixing the primary particles of the waste positive electrode material serving as a precursor with lithium salt, and performing high-temperature calcination to obtain the positiveelectrode material. According to the method disclosed by the invention, organic combination of waste positive electrode material recovery, positive electrode material primary particle synthesis, electrochemical hydrogen production and high-performance positive electrode material re-preparation is realized by a simple, efficient and environment-friendly method with relatively low treatment cost.

The invention discloses a preparation method for steel wire mesh enhanced laminated veneer lumber (LVL) based on target mechanical property. The preparation method comprises the following steps: 1) raw material treatment; 2) wood classification stacking; 3) determination of steel content and laying position of enhanced LVL; 4) layer spreading geometric design; 5) adhesive selection; 6) gumming; 7) product examination. The preparation method has the benefits that (1) controllability and designability of high-strength laminated veneer lumber production can be achieved; (2) the high-strength laminated veneer lumber structural material which can meet the target mechanical property of various engineering structures can be produced; (3) the green and reproducible engineering structural material can be developed so as to relieve environment and resource pressure.

The invention discloses a lucid ganoderma cultivation medium and a preparation method thereof. The lucid ganoderma cultivation medium is prepared from the following raw materials in parts by weight: 20-30 parts of elm branches, 18-28 parts of weed tree sawdust, 8-15 parts of bone meal, 10-15 parts of trichosanthes kirilowii Maxim shell, 5-10 parts of distillers dried grains with soluble, 4-8 parts of worm dung, 8-15 parts of cushaw stem, 5-10 parts of grape seed meal, 4-8 parts of marigold residues, 10-15 parts of bagasse, 0.3-0.6 part of monopotassium phosphate, 0.3-0.6 part of potassium nitrate, 0.3-0.5 part of calcium ammonium nitrate, 1-3 parts of discard molasses, 4-6 parts of plant ash, 1-3 parts of land plaster and 5-10 parts of nutrition additives. According to the cultivation medium disclosed by the invention, raw materials such as cushaw stem and grape seed meal are added on the basis of the traditional sawdust raw materials, cushaw stem and grape seed meal are abundant and are rich in various nutritive elements, and therefore the forest resource pressure is relieved. Meanwhile, the added nutrition additives are good for absorption and growth of lucid ganoderma, the utilization rate of the cultivation medium is improved, the biotransformation rate is increased, and the lucid ganoderma is wide, thick and solid in cover and strong in stem, rich in nutrients and high in medical property.

The invention provides a method for preparing 1,5-pentanediol by using a catalyst containing molybdenum disulfide for catalytic hydrogenation of tetrahydrofurfuryl alcohol. The method is characterizedin that the molybdenum disulfide is loaded onto carriers such as compounds of one, two or more of aluminium oxide, silicon oxide, titanium dioxide, zirconium dioxide, cerium dioxide, molecular sieves, active carbon and carbon fibers; meanwhile, hydrogenation active components are loaded; and the catalyst is applied to catalytic conversion of the tetrahydrofurfuryl alcohol for preparation of the 1,5-pentanediol. The reaction temperature is 180-300 DEG C; and the pressure is 2-7 Mpa. The catalyst provided by the invention is prepared by a relatively simple process, and is high in selectivity and good in stability.

The invention relates to a preparation method of a composite ecological permeable water storage material. The preparation method comprises the following steps: (1) breaking waste sintered bricks as construction wastes or concrete into aggregates and taking agricultural waste rice husk ash as a filler; (2) proportioning according to the ratio of cement to rice husk ash to water of 1:(0.5-0.95):(0.95-1.35), uniformly stirring, pouring into a mold and forming under pressure of 0.3-1.2 MPa; proportioning according to the ratio of cement to rice husk ash to construction wastes to water of 1:(0.1-0.4):(3.0-4.0):(0.9-1.2), uniformly stirring, pouring into the formed mold and forming under pressure of 0.5-1.5 MPa; (3) performing normal-temperature and humidity curing for 24 hours, demolding, spreading grass seeds on the surface, covering with soil, watering and curing for 28 days at a normal temperature. The material prepared by the preparation method provided by the invention not only can be used for sponge city construction, but also can reduce drainage and flood pressure, relieve a heat island effect, maintain soil moisture, improve the survival conditions of ground vegetations and soil microbes, relieve the resource pressure and improve the resource utilization rate.

The invention relates to the field of building materials, in particular to a composite wood processing technique. Cane trash, straw and sawdust are mixed and stewed with alkali, and temperature rise processing is carried out for 60-75 min; hydroxypropyl methyl cellulose is added, and heat preservation processing is carried out for 30 minutes; melamine is added, intermittent stirring is carried out, and steam drying and forming are carried out to obtain a composite wood primary finished product; the composite wood primary finished product is subjected to soaking, cold air drying and surface finishing to obtain a composite wood finished product. The processing technique is simple and pollution free, wood can be manufactured by utilizing fiber type and waste wood type materials, and the composite wood manufactured through the processing technique has high corrosion resistance, pressure resistance and bending resistance.