87results about How to "Develop circular economy" patented technology

The invention discloses a clean production process for a polyurethane synthetic leather base with ultramicro leather powder as a filling material. The process comprises the following steps: introducing air and water-based finishing slurry blended with ultramicro leather powder into a mixer according to a certain proportion and allowing a high-quality micro-foaming finishing agent to be formed under high-speed dispersion action of a stirring head; and coating the micro-foaming finishing agent and then drying and curing the micro-foaming finishing agent so as to prepare the synthetic leather base. The method provided by the invention has the advantages of simple preparation, easy control and the like, eliminates pollution of dimethyl formamide (DMF) produced in a wet production method for synthetic leather and reduces pollution of the industry of synthetic leather; and introduction of the natural ultramicro leather powder enables moisture and air permeability of polyurethane synthetic leather to be improved.

The invention discloses a vegetable and fruit biological activity seedling culture matrix as well as a preparation method and application of the vegetable and fruit biological activity seedling culture matrix. The vegetable and fruit biological activity seedling culture matrix is prepared by adding auxiliary ingredients such as excrements of plant-eating animals, soil ash or coal slag, peat, a slow-release fertilizer, a calcium-magnesium phosphate fertilizer, medium trace elements and a microbial agent into papermaking wastewater serving as a main ingredient. The matrix is soft, loose, ventilating, water-saving and drought-resisting. The matrix for culturing vegetable and fruit seedlings can achieve the effects of high seedling emerge speed, short seedling age, seedling strengthening, quality improvement, root activity enhancement, disease resistance and improvement on seedling emerge rate and seedling rate; furthermore, the vegetable and fruit biological activity seedling culture matrix is convenient to transplant; the slow seedling period is short; stable yield and high yield of vegetables and fruits are guaranteed.

The invention discloses a coking coal pretreatment method and a special device thereof. The coking coal pretreatment method comprises the following steps: transferring blending coal for coking into a humidifying and classifying bed through a feeding device; blowing the blending coal for coking into a fluidization state with waste and heat gas; regulating and controlling moisture; fractionating the blending coal by grain sizes; reducing the moisture content of the bending coal to 6-8 percent with heat gas in the humidifying and classifying bed; dividing the coal into two grain size levels, wherein one grain size level is less than or equal to 3mm, and the other grain size level is greater than 3mm; discharging fine grain coal with a grain size which is less than or equal to 3mm from the humidifying and classifying bed, and transporting the fine grain coal to a pulverizer chamber for pulverization; and transporting the pulverized fine grain coal into a coal tower. The special device comprises the humidifying and classifying bed, a coke oven chimney, the pulverizer, the coal tower and a tail gas treating device. The coking coal pretreatment method can increase the output of a coke oven, improves the quality of the coking coal, reduces the energy consumption of the coke oven and the exhaust of waste gas and waste liquid, is applied to a coal pretreatment technology in a coking industry and can realize the purposes of energy saving, emission reduction and circular economy development.

A process for producing zinc sulphate monohydrate (feed grade) from waste acid and waste zinc dross includes the steps of (a) sulfuric acid leaching, (b) deironing, (c) purification for copper and cadmium removal, (d) dechloridation, (e) defluorination, (f) indium and cadmium extraction and (g) evaporative crystallization. The feed-grade zinc sulphate monohydrate is produced from the waste acid, waste zinc dross and the like, comprehensive utilization of waste is achieved, and the production cost of raw materials is reduced, so that resources are saved. Therefore the waste of massive zinc enterprises in China is recycled to produce economic benefits, the waste is changed into the valuable, a disadvantage is turned into an advantage, secondary utilization of the waste is achieved, comprehensive recycling of waste acid and waste dross resources is achieved, solid and liquid are separated, and the concentration crystallization and drying technology, the energy saving technology and the like are improved. The work of energy conservation, water conservation, comprehensive utilization, environment protection and the like is completed, the social benefits are remarkable, and remarkable environmental protection benefits and economic benefits are achieved.

The invention relates to a coal composite sulfur fixing agent, belonging to the technical field of boiler combustion desulphurization. The composite sulfur fixing agent is made of the following raw materials in parts by weight: 40-70 parts of CaO, 5-10 parts of SiO2, 5-15 parts of Al2O3, 3-5 parts of Fe2O3, 0.5-1 parts of BaS, 0.5-1 parts of BaCO3, 0.1-1.5 parts of Zn, 0.02-0.05 parts of Cu, 0.05-0.1 parts of As, 0.01-0.05 parts of Pb, 1-5 parts of CaF2, 0.05-0.2 parts of MgO, 0.5-1.0 parts of TiO2, 0.5-1.0 parts of K2O, 0.1-1.0 parts of Na2O and 0.04-0.06 parts of Ag. The coal composite sulfur fixing agent of the invention can reduce the emission of SO2, the atmospheric pollution and the formation conditions for acid rain. Since pulverized fuel ash and coal cinder are converted to modified ash and can be used in cement production technology, the clinker production of common cement can be reduced generally, the mine resources and the energy consumed during cement production are reduced, and the emission of CO2 is reduced.

The invention relates to a method for preparing electric deposited cobalt by circulating hydrochloric acid. At present, various preparation processes of the electric deposited cobalt have huge potential hazard risk to the environment. The preparation process comprises the following steps of: leaching and purifying cobalt concentrate, copper-cobalt alloy or crude cobalt salt as raw materials; then extracting by adopting P507 to extract the cobalt; back extracting to obtain cobalt chloride solution with hydrochloric acid; deoiling the cobalt chloride solution and then mixing the denoiled cobalt chloride solution with part of electric deposited liquid to obtain front electric deposited liquid; carrying out electric deposition in an airtight electrolytic cell to obtain the electric deposited cobalt; allowing chlorine gas generated in the electric deposited process and back electric deposited liquid to enter the interior of an electric deposited circulating tank; after the mixture is separated by a gas-liquid separator, separating wet chlorine gas from the electric deposited liquid; and carrying out vacuum antichloration on the electric deposited liquid and returning the treated electric deposited liquid to work procedures of preparing the front electric deposited liquid and back extracting the P507. The electric deposited cobalt obtained in the invention has high purity; a byproduct hydrochloric acid has high purity and is recycled; and the discharge of the chlorine gas or chloride ions is avoided; and the influence on the environment in the treatment process by other treatment methods of the chlorine gas is avoided.

The invention relates to a cement-free and baking-free shale suppression bearing brick and a manufacturing method thereof, which relates to a construction-used bearing brick and a manufacturing method thereof. Ordinary shale is used as main raw material and various 'wastes' are used as ingredients in the method; no open fire, waste gas, ash or waste water is produced in the manufacturing process which ensures low water and electricity consumption; various primary technical performances of a product are excellent. The method comprises steps that: (1) the materials are prepared according to following weight ratio: 40 to 50 percent of shale rock, 20 to 21 percent of auxiliary material, 4 to 6 percent of taillings powder, 7 to 9 percent of heavy calcium carbonate, 4 to 6 percent of gravel soil, 3 to 4 percent of alkali residue, 4 to 7 percent of construction waste, 5 to 6 percent of MSH polymerization condensate material especially used for shale and proper amount of water; (2) raw material treatment; the primary material and the auxiliary material are grinded; (3) ingredient stirring; (4) well-proportioned mixing and ageing; (5) mulling and plasticizing; (6) suppressing and forming; (7) steaming, pressing and solidification into finished product. The practice of the invention is environment friendly, and the quality of manufactured products is excellent, which reaches the standard of the bearing brick but has low cost and can be taken as the bearing brick for replacing a clay brick.

The invention relates to the technical field of recycling of steel slag, in particular to a steel slag powder producing method employing a roller press. The method is characterized in that a closed loop formed by a high-pressure roller press, a bucket elevator, a static powder concentrator and a dynamic powder concentrator produces the steel slag powder; and the specific surface area of an obtained steel slag powder product is larger than 450m<2>/kg, the iron content is lower than 0.1% after the steel slag powder passes through a plurality of magnetic separation devices, and the negative pressure operation is adopted inside the static powder concentrator. Compared with the prior art, the method has the benefits that the closed loop and the negative pressure operation are adopted, therefore dust is little, the energy is saved, and the environment is protected; partial hot gas is recovered, and the heat energy utilization rate is improved; only the high-pressure roller press is adopted for grinding, so that the technological process is simple, and the investment is small; and the iron content is lower than 0.1%, the product quality is improved, the high value-added utilization of steel tailings is achieved, land-occupation stacking of the steel tailings is reduced, the environmental pollution is reduced, and the circular economy is developed.

The invention discloses cement clinker and a preparation method thereof. The cement clinker is prepared from the following raw materials in part by weight: 60-88 parts of aluminum extracted coal ash residue, 38-10 parts of limestone and 1-3 parts of iron ore. The preparation method of the cement clinker comprises the following steps of: firstly, grinding the raw materials; then, homogenizing the ground raw materials; and finally calcining the raw materials to obtain the cement clinker. The invention overcomes various defects in the prior art, simple raw materials and high utilization rate are realized, and the traditional cement production process does not need to be improved. The obtained portland cement has high early strength, and the amount of strength increase is stable without great fluctuations. Compared with the traditional cement clinker production process, the preparation method can enable the consumption of limestone for each ton of cement clinker is lowered by 60-90%, the emission amount of CO2 is lowered by 60-90%, energy consumption is lowered by more than 30%, and the production capacity of single kiln is improved by 30%. The preparation method is a cyclic and economic project tightly linked to aluminum extraction from coal ash.

The invention discloses a desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board. The desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board comprises ingredients A and ingredients B. The ingredients A comprise polyether polyol, polyester polyol, polypropylene glycol, structural flame resistant polyol, modified desulphurization gypsum powder, a foam stabilizer, a gel-type catalyst, a trimerization catalyst, a liquid fire retardant and a foaming agent; the ingredients B comprise polyaryl polymethylene isocyanate. A preparing method includes the steps that the ingredients A are stirred to be even, the foaming agent is added, then the ingredients B are added, the mixture is stirred at the high speed to be poured into a constant temperature mold, foamed, cured and demolded, and the desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board is prepared. According to the desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board and the preparing method, a by-product desulphurization gypsum of the coal electricity plant industry is fully used, desulphurization gypsum powder is successfully and organically modified, and the compatibility between the desulphurization gypsum powder and a raw polyurethane material is enhanced; the product has high fireproof performance and good mechanical performance at the same time, and combustion performance can meet the A-grade requirement of the national standard.

The invention discloses a heating and cooling system using swallet waste heat by industrial and mining enterprises, relating to the field of residual heat waste heat resource utilization. The heating and cooling system comprises a well-head freeze protection water source heat pump unit (5), a worker bath water source heat pump unit (6), an industrial heating and cooling water source heat pump unit (7), a mine water recycle pump (2), a primary water recycle pump (4), three secondary water recycle pumps, a bath water heating recycle pump (13), two plate-type heat exchangers and a sub-water catcher (17). In the invention, a water source heat pump technology is used and reclaimed water waste heat in a mine water treatment plant is comprehensively utilized for worker bath, industrial heating in winter, well-head freeze protection and cooling of office buildings and apartment blocks in summer; a coal-fired boiler system is thoroughly replaced; a water source heat pump system only extracts the heat of the reclaimed water of the treated mine water and domestic sewage, and additional water resources are not consumed; and the heating and cooling system has the advantages of remarkable energy saving effect, obvious economic benefit, outstanding environmental benefit and the like.

The invention provides a preparation method of liquid rubber asphalt water-proof paint and relates to a preparation method of water-proof paint. The preparation method provided by the invention is a preparation method of a rubber asphalt emulsion by taking a non-ionic surfactant as an emulsifying agent. The preparation method comprises the following steps: 1, preparing a non-ionic reclaimed rubber emulsion from the following components in parts by weight: 100 parts of reclaimed rubber, 0-2 parts of stabilizing agent, 0-8 parts of non-ionic emulsifying agent 1, 0-2 parts of non-ionic emulsifying agent 2 and 100 parts of water; 2, preparing a non-ionic asphalt emulsion from the following components in parts by weight: 100 parts of 70# petroleum asphalt, 0-2 parts of non-ionic emulsifying agent 1, 0-1 part of non-ionic emulsifying agent 2, 0-1 part of stabilizing agent and 100 parts of water; and 3, preparing the liquid rubber asphalt water-proof paint from the following components in parts by weight: 70-80 parts of non-ionic reclaimed rubber emulsion, 20-30 parts of chloroprene rubber latex and 100 parts of non-ionic asphalt emulsion. The liquid rubber asphalt water-proof paint prepared by using the method can be widely used in projects with high thermal resistance requirement and railway, highway, municipal bridges and building waterproof and anticorrosive projects which have high crack resistance requirements.

The invention discloses a device and a technology for poly-generation of carbon, heat and electricity based on biomass gasification. The technology comprises steps of biomass transport, biomass gasification, boiler processing, electricity generation, desulphurization and dust removal. A large-dip-angle belt is adopted to perform continuous automatic feeding for biomass transport; a composite gasification fixed bed gasification technology with combination of upper and lower suction is adopted for biomass gasification, and a byproduct is a carbonized material; steam produced by a boiler after burning of gasified gas enters a steam turbine for generating electricity and then passes through a heat exchange station for providing a heat source for heating; a scattering tower based desulphurization and dust removal integration technology is adopted for desulphurization and dust removal. The device and the technology have the advantages of being environmentally friendly and safe and realizingpoly-generation of carbon, heat and electricity.

The invention discloses a technological method for recycling lithium from lithium-containing waste liquid of medicine and synthetic plastics. The technological method comprises the following steps of: (1) preparing feedstocks; (2) evaporating and concentrating the feedstocks so as to obtain crude lithium carbonate; (3) drying the crude lithium carbonate; (4) calcinating the dried lithium carbonate so as to obtain crude powdery lithium carbonate; (5) adding water into the crude powdery lithium carbonate so as to pulpify the crude powdery lithium carbonate, and introducing CO2 into the lithium carbonate slurry so as to acidify the lithium carbonate slurry; (6) performing resin purification on the acidified lithium carbonate slurry so as to obtain lithium bicarbonate purified liquid; (7) heating the lithium bicarbonate purified liquid for decomposition and washing and separating the liquid so as to obtain wet pure lithium carbonate; and (8) drying the wet pure lithium carbonate so as to obtain powdery pure lithium carbonate; or acidifying the wet pure lithium carbonate, then concentrating and crystallizing the acidified lithium carbonate, and drying the crystallized lithium carbonate so as to obtain the powdery pure lithium carbonate. The technological method disclosed by the invention is simple in process, high in recycling rate, controllable in cost, and easy to popularize and apply in industrial production. Through the recycling of the lithium-containing waste liquid resources in the medicine and synthetic plastics industry, a national precious rare resource is saved.

The invention discloses a method for preparing aluminum-magnesium silicate from fly ash. Fly ash which is huge in emission amount and pollutes the environment after being emitted is fully used as the raw material, the defect that the yield and cost of an existing aluminum-magnesium silicate preparation method is limited by distribution and reserves of natural aluminum-magnesium silicate ore is overcome, circular economy and saving economy can be developed, and damage of fly ash emission to the natural ecological environment can be reduced. Besides, the performance of an aluminum-magnesium silicate product prepared through the method meets the industrial standard, and purity, whiteness and the like of the product are even better than industrial product indexes.

The invention especially relates to river bottom sludge sintered ceramsite and a preparation method thereof. According to the river bottom sludge sintered ceramsite and the preparation method thereof,the sintered ceramsite prepared by utilizing river bottom sludge, yellow river silt and coal ash as main raw materials is superior to the national standard and has good performance of a high strength, a low water absorption rate and the like. Therefore, circular economy of river improvement is developed, land is saved, pollutant discharge is reduced, production cost is reduced, and good social benefits and economical benefits are achieved.

The invention belongs to the technical field of stainless steel smelting, and relates to an economical chromium-manganese stainless steel smelting production method and system. The economic chromium-manganese stainless steel smelting production method comprises the following steps: (1) adding stainless steel scrap into an alloy melting furnace, and melting the scrap with electricity to obtain stainless steel mother liquor; (2) sampling and analyzing the stainless steel mother liquor, and submitting components to an AOD refining process; (3) mixing the stainless steel mother liquor in an AOD refining converter, completing decarburization, chromium preservation and component adjustment through a process control model, and obtaining liquid stainless steel; and (4) transferring the liquid stainless steel into an LF ladle refining furnace, and carrying out continuous casting after slagging and desulfurization. The economic chromium-manganese stainless steel smelting production method is high in element yield, low in investment and operation cost, and capable of saving energy, reducing emission, and meeting the sustainable development concept.