55results about How to "Reduce overexploitation" patented technology

The invention discloses a soilless cultivation organic substrate and a preparation method thereof. The preparation method comprises the following steps: respectively mixing the broken blocks of maize cobs, the broken blocks of maize stalks and rice hulls evenly after being stacked and fermented in the volume ratio of 3-4:3-5:2-4 and then adding 10-15kg/m3 of puffed chicken dung according to the total volume after being mixed evenly. The soilless cultivation organic substrate provided by the invention adopts the main raw materials of the maize stalks, the maize cobs and the rice hulls which are discarded in the local agricultural production so as to replace the substrate raw material of grass carbon which is commonly used in seedling raising at present, which not only can save the seedling raising cost greatly but also reduces the overexploitation of the unrenewable resource of the grass carbon and maintains the sustainable development of ecology; on the other hand, by utilizing the agricultural wastes reasonably, the income of local farmers is increased, and the wastage of resources is reduced.

The invention relates to the technical field of building materials, in particular to the technical field of high-strength lightweight aggregate concrete materials, and particularly discloses environment-friendly lightweight aggregate concrete and a preparation method thereof. The concrete is prepared from, by weight, 1 part of cement, 1.796-1.908 parts of pumice coarse aggregate, 0.356-0.796 part of pumice sand, 0.382-0.823 part of ferrous mill tailings, 0.005-0.015 part of additive and 0.315-0.45 part of water. The pumice coarse aggregate is subjected to hole sealing treatment, and a hole sealing material is formed by evenly mixing ordinary sand with granularity not larger than 1.18 mm and cement according to the mass ratio of 1:1. The environment-friendly lightweight aggregate concrete has the advantages of being low in manufacturing cost, high in strength and environmentally friendly; the preparation process is simple, the optimization and utilization of pumice resources and ferrous mill tailing waste are effectively achieved, and the concrete has remarkable economic and social benefits.

The invention discloses a simulation system for physical properties and digital attributes of a textile fabric and a measurement method. The simulation system comprises a computer system, fabric simulation software, a fabric physical property measurement device and a fabric scanning system, wherein the fabric simulation software is arranged in the computer system; the fabric physical property measurement device and the fabric scanning system are connected with the computer system separately; the computer system is provided with a data output port; and various physical data during fabric measurement and data during fabric scanning are subjected to operation work through the computer system. The real visual effect of the physical attributes of the garment fabric can be quickly and virtually shown, the technical problems of distortion and deficiency of various physical attributes of the garment fabric simulated by three-dimensional garment simulation software in the market at present are successfully solved, and the realistic design effects of various dresses, work clothes, underwear, three-dimensional embroideries and the like can be shown.

The invention discloses a method for producing a solanaceous vegetable seedling growing substrate by utilizing a salvaged material of cassava processing. Cassava peels and starch residues are used as main raw materials, chicken manure and seed tung tree bran or chicken manure and shell powder are used as auxiliary materials, and the excellent solanaceous vegetable seedling growing substrate is produced through fermentation. The substrate is light and loose, has the advantages of good permeability, good water holding and fertilizer retaining abilities, and balanced, scientific and reasonable nutrient supply, can meet the balance demand of solanaceous vegetable crop seedlings on nutrients during a whole growth period, and effectively improves the survival rate, the stress resistance and the growing seedling quality of the solanaceous vegetable growing seedlings. The method realizes harmless treatment and resource utilization of the salvaged material of cassava processing, avoids great waste of resources and serious pollution of the environment, provides a new way for comprehensive utilization of the agricultural salvaged material, reduces the substrate production cost, reduces excessive exploitation of peat resources, protects the natural environment, and has wide application value.

The invention relates to a method for preparing active slag powder and aggregate from treated waste concrete in a vertical kiln factory. According to the method, vertical kiln concrete production line process equipment is used; crushed waste concrete is roasted at 980 DEG C to 1280 DEG C in a vertical kiln; then, cleavability power grinding and sorting are carried out; active slag powder and active aggregate are prepared. The method has the advantages that the vertical kiln concrete production line equipment can be used; all ingredients of waste concrete components are simply, conveniently and effectively utilized at low cost; excellent active slag powder and excellent active aggregate with higher additional values and wide market purposes are produced.

The invention discloses a method for selectively and efficiently extracting zinc and removing iron with zinc-containing electric furnace dust as a raw material and belongs to the field of hydrometallurgy. The raw material is the zinc-containing electric furnace dust, an extracting agent is ammonium ferric sulfate dodecahydrate (NH4Fe(SO4)2.l2H2O), the extracting process includes the steps that the zinc-containing electric furnace dust is washed and dried to be evenly mixed with the ammonium ferric sulfate dodecahydrate according to a certain mass ratio, the mixture is placed in an airtight reaction still to be subjected to a hydrothermal reaction for a certain period of time at a certain temperature, the reaction product is taken out to be placed into a centrifugal device, a proper amount of water is added, solid and liquid are separated after stirring, and a zinc-containing leaching agent and iron-containing leaching residues are obtained. The process is simple, the purposes that zinc is extracted efficiently and iron is removed can be achieved through one step, the leaching rate of zinc is over 93%, the leaching rate of iron is lower than 2%, and most of iron is remained in the leaching residues; and the solid-liquid separation process is easy to conduct. By the adoption of the method, zinc can be extracted selectively and efficiently from the zinc-containing electric furnace dust, operation is easy, and the method is a novel method for selectively and efficiently extracting zinc from the zinc-containing electric furnace dust.

The invention discloses a vegetable plug seedling composite substrate and a preparation method thereof. The substrate comprises the following components in percentage by volume: 60-80 percent of chestnut shell and/or peanut shell composting product, 10-20 percent of thoroughly decomposed chicken manure and/or pig manure and 10-30 percent of furnace slag ash and/or perlite. The preparation method comprises the following steps: treating chestnut shell and/or peanut shell and chicken manure and/or pig manure by piling and covering a film for decomposing; smashing waste furnace ash slag and sieving; fully and uniformly mixing the obtained chestnut shell and/or peanut shell composting product, the thoroughly decomposed chicken manure and/or pig manure and the furnace slag ash and/or perlite to obtain the composite substrate. In the composite substrate, the waste chestnut shell and/or peanut shell, chicken manure and/or pig manure and furnace slag ash and/or perlite are taken as raw materials which are readily available, so that waste is turned into wealth, resources are saved, and the local environmental pollution is lowered; more importantly, the composite substrate is lower in cost than the conventional substrate but higher in nutrition than the conventional composite substrate, and has a good seedling effect.

The invention relates to a lightweight aggregate concrete column with steel-armored corners. The lightweight aggregate concrete column comprises a column body fabricated by lightweight aggregate concrete, wherein the column body is coated with a steel angle at each corner along the length direction; the outer surface of each steel angle is higher than or flush with the surface of the column body; the inner surface of each steel angle is reliably attached to the column body; each two adjacent steel angles are connected through a transverse hoop; the hoops are welded at the inner surfaces of two limbs of the steel angles. The invention also relates to a fabrication technology of the lightweight aggregate concrete column with the steel-armored corners. The fabrication technology comprises the following steps: supporting a template according to a steel design result; welding a steel angle skeleton; pouring the lightweight aggregate concrete; and maintaining. The lightweight aggregate concrete column with the steel-armored corners has the characteristics of having energy-saving and environment-friendly effects, and being high in carrying capacity, good in anti-seismic property, convenient and fast in construction and good in economic benefits on the premise of meeting various performance indexes (carrying capacity, ductility, durability and the like) of the column; the dead load of the column is reduced; the lightweight aggregate concrete column is applicable to large-scale popularization and application, and has significant economic and social benefits.

The present invention discloses a composite substrate comprising mushroom bran waste and used for culturing watermelon and muskmelon seedlings and a preparation method therefor, and relates to a watermelon and muskmelon seedling culturing substrate and a preparation method therefor. The substrate provided by the present invention aims to solve the technical problem that the production cost of the substrate is increased as the fermentation period is long when conventional mushroom bran is used as a seedling culturing substrate. The composite substrate comprising mushroom bran waste and used for culturing watermelon and muskmelon seedlings provided by the present invention is prepared from oyster mushroom residues, shiitake mushroom residues and soil. The method comprises: 1, mixing the stacked oyster mushroom residues and the stacked shiitake mushroom residues with the soil, adding water, and constructing a stack to perform stack fermentation; and 2, carrying out secondary stacking: when a center temperature is 40-55 DEG C, performing primary turning; when the center temperature is 60-80 DEG C, maintaining the temperature for a week; and when the temperature falls, performing secondary stacking until the temperature does not rise again to obtain the seedling culturing substrate. According to the composite substrate comprising mushroom bran waste and used for culturing watermelon and muskmelon seedlings and the preparation method therefor provided by the invention, the production cost is lowered, and excessive exploitation of peat resources is reduced. The composite substrate comprising mushroom bran waste and used for culturing watermelon and muskmelon seedlings and the preparation method therefor are applied to the field for preparing the watermelon and muskmelon seedling culturing substrate.

The invention relates to a reinforcement lightweight aggregate concrete flat beam structure which comprises a column, a beam and a plate, wherein the beam is a flat beam made of a reinforcing steel bar and lightweight aggregate concrete, the width of the flat beam is more than or equal to the height; and the column is a reinforcement lightweight aggregate concrete column. The reinforcement lightweight aggregate concrete flat beam structure provided by the invention also has better properties of light weight, energy saving, environment friendliness, good durability and the like of the lightweight aggregate concrete under the condition of the advantages of reducing floor height, avoiding pipeline beam crossing and the like, greatly reduces self gravity of the whole building structure and improves earthquake resistant behaviour of the structure while ensuring bearing capacity, and has remarkable economic and social benefits.

The invention discloses a production technology of a nature-imitated stone material cast stone. The technology comprises the following steps: 1, making a die; 2, raw material mixture, water addition and stirring: uniformly mixing raw materials, adding water, and uniformly stirring to obtain a slurry; 3, carrying out pouring molding; 4, maintaining: 5, shot blasting: carrying out shot blasting on the above obtained maintained semi-finished product to make aggregates exposed and make the appearance have the qualitative sense of a natural stone material; 6, carrying out secondary maintenance; and 7, trimming: trimming the above obtained product to make the obtained finished product have orderly and smooth edges and unified specifications. The aggregates of the nature-imitated stone material cast stone produced by using the above technical scheme are exposed, so the unvarnished and rough qualitative sense of the natural stone material is presented; the regular and smooth edges and the unified specifications of the finished product make the product have a beautiful edge joint and can completely replace the natural stone material in order to reduce the excess exploitation of natural resources; and the nature-imitated stone material cast stone can substitute a GRC + coating decoration system in order to eliminate the hidden safety troubles caused by GRC cracking, chapping and the like and reduce the later stage maintenance cost.

The invention relates to a method for manufacturing high-quality reclaimed sandstone aggregate by modifying construction waste particle materials. The method comprises the following steps: modifying the crushed construction waste particle materials with a size less than or equal to 35 mm in a modifier through alternated mechanical grinding and physical disintegration, removing defects of soft structures, sharp corner angles, debris and cracks from the surfaces of the construction waste particle materials to form modified sand, stone and fine materials of construction waste, and performing separation to form the high-quality reclaimed sandstone aggregate. The method can meet requirements of the construction industry on the high-strength and high-performance reclaimed aggregate and achieve recycling of construction waste materials, and is low in investment and cost, environmentally friendly and energy-saving.

The invention discloses a method for optimizing engineering parameters by using a Bayesian optimization algorithm. The method is used for optimizing performance parameters having a function relationship with the engineering parameters under an engineering constraint condition. According to the method, a new acquisition function is defined, an adaptive target value ytarget (k) is introduced into the acquisition function to replace an optimal solution item ymin of a traditional expectation improvement criterion in the prior art, and an adaptive weight coefficient item wk is introduced, so that the traditional expectation improvement criterion is evolved into an adaptive jump weighted expectation improvement criterion. According to the method, the situations of excessive development and excessive exploration can be reduced to a certain extent, the optimization efficiency is improved, the waste of computing resources is reduced, and a better optimization effect is obtained.

The invention belongs to the technical field of preparation of calcium sulfate whiskers, and particularly relates to a phosphoric acid byproduct calcium chloride solution and a method for preparing calcium sulfate whiskers from sodium sulfate. The phosphoric acid byproduct calcium chloride solution is a hydrochloric acid method wet process phosphoric acid byproduct calcium chloride solution, and calcium sulfate whisker is prepared by adopting an acidification method: calcium salt and sulfate generate calcium sulfate precipitate under an acidic condition, the calcium sulfate precipitate is washed with hot water and then dried and dehydrated to obtain calcium sulfate hemihydrate whisker, and anhydrous calcium sulfate whisker is obtained after calcination. The raw materials are easy to obtain, the value of industrial byproducts is improved, full utilization of resources is realized, the calcium sulfate whiskers are prepared by adopting an acidification method, the production energy consumption is reduced, and the calcium sulfate whiskers with high whiteness, high purity and high content are obtained.

The invention discloses a water-saving and high-income crop rotation method for spring mung beans and summer corns in North China, and belongs to the technical field of agricultural planting. A springmung bean-summer corn rotation mode is introduced in North China to replace a traditional wheat-corn rotation mode, the spring mung beans are used as preceding crops, and the summer corns with the short growth period are used as afterreap crops. The spring mung beans are relatively strong in ecological adaptability and have the certain drought resistance, and straws returned to field after harvesting have the soil fertilizing effect. The rotation mode is beneficial to water saving and fertilizer saving, the single rotation mode is broken, diversified planting systems are constructed, and theincome of farmers is improved.

The invention relates to a CS30 spraying steel fiber concrete prepared from ferrous mill tailings. The CS30 spraying steel fiber concrete is prepared from the following components in percentage by weight: 12 to 14% of cement, 1.5 to 2.0% of silica powder, 3 to 4% of fly ash, 28 to 35% of crushed stone, 35 to 42% of ferrous mill tailings, 1.2 to 2% of steel fiber, 7.5 to 8.5% of water, 0.18 to 0.25% of polycarboxylate superplasticizer, and 1.3 to 1.8% of accelerator. The CS30 spraying steel fiber concrete has the advantages that the ferrous mill tailings are used for completely replacing natural river sand, so that the excessive production of natural river sand is effectively decreased; according to the land advantages of the iron ore producing area, the mine wastes of ferrous mill tailings and the like are furthest consumed; because the steel fiber is adopted, the tensile strength, breaking strength and adhesion force of the concrete are obviously improved, and the structure toughness is also greatly improved.

The invention discloses an indoor running water flow rate conversion water saving device; according to the water saving device, high-pressure running water can enter a water tank by virtue of a float switch and then the high-pressure running water can flow out by virtue of a water draining switch, so that the flow rate of the running water is reduced, a water flow is reduced but a water flow diameter is kept unchanged; therefore, the purpose of saving water is achieved. The water saving device is characterized in that I, the running water enters the water tank 1 by virtue of a tee interface 2 and the float switch 3 and the running water is discharged by virtue of a filter 5 and the water draining switch 6; II, precipitates in the bottom of the water tank 1 can be discharged by virtue of a blow-down switch 10; and III, by virtue of a heater 11, the water in the water tank 1 is heated through a power plug 14, a temperature controller 13 and a water temperature sensor 12, so as to facilitate users in a bathroom and a kitchen in the winter. The water saving device disclosed by the invention is simple in structure, low in cost and significant in water-saving effects, and the water saving device is widely applicable to homes and office spaces. A total water-saving amount can reach 20-60%, so that drought and water shortage in northern regions can be further relieved, the over-exploitation of underground water in various regions can be relieved, environmental pollution caused by sewage discharge can be reduced and sewage disposal cost can be reduced.