748 results about "Coal waste" patented technology

The invention relates to a burning-free block brick prepared from bulky industrial waste residues. The burning-free block brick is characterized in that the block brick comprises the following raw materials in parts by weight or volume: 10-80 parts of at least one of tailing, magnesium slag, basic slag, mountain flour, cinder, fly ash, coal gangue, oil shale waste and sulfuric acid slag, 0-80 parts of at least one of gravel, waste sand, construction waste, garbage to be burnt, steel slag, mineral slag, copper slag, iron slag with gold, ardealite, phosphorous slag and carbide slag, 0-50 parts of active cementing material, 0-30 parts of cement clinker, 2-15 parts of cement and a defined amount of water. The preparation method of all types of burning-free and steaming-free standard bricks, perforated bricks, hollow blocks, paving tiles, road edge bricks and fence railings which have low cost and high strength, is as follows: proportioning, stirring for 1-6 minutes, adding a defined amount of water to stir, placing in moulds to form in a machine and performing natural curing for 7-28 days. The burning-free block brick has high raw material selectability, simple technology and wide development and application prospects, and is environmental-friendly.

The invention relates to wind pressure air drilling equipment in a downhole soft outbursting coal bed and a process matched therewith. At present, as the consequent layer drilling characterized by high construction speed, low cost and high gas extraction efficiency becomes the primary option for coal control and gas control in coal mines, for soft outbursting coal beds, the gas extraction efficiency is directly dependant upon the pore-forming rate of the consequent layer drilling. The equipment comprises a boring machine, an air compressor, an orifice dust collection and dust removal device, a high-strength large through-hole drill rod, a drill bit with an inner core which can automatically fall off, and an antistatic explosion-protection PVC sieve tube; the boring machine which has large power and large torque supplies power to drilling construction; the orifice dust collection and dust removal device collects and eliminates slack carried out by wind from the orifice during drilling; and the antistatic explosion-protection PVC sieve tube is transferred from the interior of the high-strength large through-hole drill rod to the bottom of the orifice without lifting a drill on the completion of drilling, and at last remains in the orifice, thereby ensuring the completeness of drilling. The equipment and the process matched therewith provided by the invention has the advantages of increasing the pore-forming rate of the consequent layer drilling in soft outbursting coal beds, improving the effect of gas extraction, improving the working atmosphere of downhole air drilling, and protecting the production safety of outbursting coal mines.

The invention discloses a drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device and a using method thereof. The drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device comprises a water jet high and low pressure switching device, a blowout control hole guide device and a gas and slag separation discharge device. The water jet high and low pressure switching device is positioned between a drill bit and a drill stem and can achieve flexible switching between low-pressure drilling and high-pressure water jet slotting and punching. The blowout control hole guide device is positioned between the drill stem and a drill hole and used for guiding water coal slag and gas sprayed out of the drill hole into the gas and slag separation discharge device. The gas and slag separation discharge device is connected with the blowout control hole guide device through a pipeline and used for separating and discharging the coal slag and the gas in a sealed environment. The complete drilling, pumping and discharging integrated coal seam pressure relief and permeability improvement device can achieve flexible switching of high and low pressure drilling, timely collects, separates and discharges the gas and slag, and is simple, reliable, easy to assemble and disassemble, capable of being used for multiple times conveniently and especially suitable for performing multiple drill hole operation at the same workplace.

The present invention relates to a gas pumping and exchanging method and devices in a coal mine and coal seam, and belongs to the coal mine security field; the present invention aims to prolong the service life of the drill and improve the drilling depth and the drilling speed, and to enhance the safety during pumping gas and to improve the validation of the coal seam. The present invention is characterized in that the method is performed by following steps: starting a high-voltage water pump, adjusting a valve, drill pushing, hole drilling, adjusting the valve drill rotating, grooving, and shutting down the high-voltage water pump. The devices involved in the method mainly comprises the high-voltage water pump, a mixing chamber, abrasive cans, a high-voltage sealed rotator, a drill, drill pipes and a multifunctional drill; the method uses the multiphase oscillation jet to cut off and break the coal seam and also to drill holes and cut grooves; the power effect leads to the evolution of the coal seam fractured field, thereby improving the validation of the coal seam. And the cinder produced is wee and can flow away with water, thereby avoiding the drill holding and the hole bursting; the method can be used to pump and exchange gas in different quality coal mines and to improve the pumping and exchanging capability of the gas.

The invention discloses a double-cyclone coal pyrolysis gasification step converting device and a double-cyclone coal pyrolysis gasification step converting method, and relates to a combusting device and a combusting method. The device is characterized in that a cyclone pyrolyzing furnace is communicated with a cyclone gasifying furnace by a material backing device and a pyrolyzing semi-coke channel; the cyclone gasifying furnace is communicated with the cyclone pyrolyzing furnace by a high-temperature raw coal gas channel; the cyclone pyrolyzing furnace is communicated with a cooling device by a pyrolyzing gas-mixing channel; an oxidant spray nozzle and a vapor spray nozzle are arranged on the outer wall of the cyclone gasifying furnace. The method is as follows: firstly, feeding coal dust into the cyclone pyrolyzing furnace under blocking and feeding of the high-temperature raw coal gas; secondly, pyrolyzing the coal dust in the cyclone pyrolyzing furnace, exhausting the pyrolyzed gas mixture into the cooling device, cooling, and conveying back the pyrolyzed semi-coke to the cyclone gasifying furnace; thirdly, spraying the oxidant and the vapor into the cyclone pyrolyzing furnace by the oxidant spray nozzle and the vapor spray nozzle at the same time, wherein the produced high-temperature raw coal gas is re-fed into the cyclone pyrolyzing furnace as a coal pyrolyzing gas heater carrier; coal residue in the cyclone gasifying furnace is exhausted through an ash residue discharge hole in the form of solid or liquid. The double-cyclone coal pyrolysis gasification step converting device and the double-cyclone coal pyrolysis gasification step converting method are used for gasifying clean coal gas.

The invention belongs to the technical field of preparation of substitutive natural gas from coal, and relates to a device and method for directly preparing methane based on coal chemical chain gasification. Pulverized coal particles pass through the upper portion of a chemical chain gasification reactor and enter a chemical chain gasification reactor, oxidation state multifunctional composite oxygen carrier particles and unreacted carbon in the pulverized coal particles enter a regeneration reactor on the upper portion of a coal methanation section through a first flowing control device, coal slag obtained after reacting is discharged through a slag discharging opening, gas separated by a cyclone separator sequentially passes through a gas purifying unit and a gas separation unit, methane gas is obtained, and coal ash obtained after separation of the cyclone separator, part of unreacted carbon and the oxidation state multifunctional composite oxygen carrier particles return to the chemical chain gasification reactor or the regeneration reactor again to be recycled. The device is simple in structure and convenient to operate, the process theory is scientific, the raw materials are easy to obtain, cost is low, thermal efficiency is high, the carbon utilization efficiency is high, fewer pollutants are generated, and environmental friendliness is achieved.

The invention discloses a method for recycling uranium from uranium extraction coal residue with a wet method, which comprising the following steps: (1) particle size requirements: crashing the coal residue below 200 meshes; (2) oxidation and acid leaching: in a dilute sulphuric acid-hydrofluoric acid medium, using peroxide as an oxidizer to carry out reverse oxidation leaching twice; (3) desilicification and purification: using ammonia to adjust the pH value of once leaching filtering liquid of the uranium to 9.8-10.2, enabling the silicon in the solution to become silicic acid sediments, after filtering, carrying out ion exchange on the filtering liquid, desilicificating slag and stockpiling; (4) ion exchange: using a 717 type ion exchange resin to carry out exchange absorption by the filtering liquid, and then using 1 mol/L of NaCl-0.1 mol/LH2SO4 of mixed solution to elute the resin, after using tributyl phosphate to carry out extraction and back-extraction on eluent, obtaining uranium concentrates containing about 65% of the uranium. The invention successfully extracts and separates the uranium from the uranium extraction coal residue to produce the uranium concentrates, has t high recycling rate of uranium as high as 80-85% and low cost, and comprehensively utilizes the uranium extraction waste, thereby eliminating the influence of the radiation wastes on the ecological environment.

The invention relates to oil cinder extraction process and the device that adopts extraction kettle, evaporation kettle, solvent recycle kettle, solvent condenser, cooling water circulatory system, magnetic stirrer, and valve pipeline and controller platform. The extraction could take place of petrol and diesel oil after post process, or further separating into organic chemicals. It is low cost, safe to operation, low energy consumption, and has good cooling effect, high recycling ratio and could save solvent and water resource. The invention has great social and economic benefits.

The invention relates to a method and a device for testing the gas permeability of an isolating layer of a self inflammable coal refuse heap, which belongs to the technical field of treatment and utilization of environmental, ecological and solid waste. The method comprises the following steps: the device is hermetically connected by a gas injection chamber, a test chamber and an exhaust chamber in turn along the direction of the gas paths, so as to form an enclosed gas chamber; the gas paths of the upstream section and the downstream section are isolated by an isolating layer sample in the test chamber; constant-pressure air flow is injected on the upstream section; a downstream instrument is communicated with the atmosphere; and the gas permeability of the isolating layer sample is determined after the positive pressure difference on both sides of the sample is stabilized. The test method is simple and convenient; the dimension of the sample is large; the test process well simulates the objective reality; and the method can detect the gas permeability of the isolating layer for treating the self inflammable coal refuse heap, and guarantee that the configuration of the isolating layer has the function of air barrier, thereby preventing spontaneous combustion of the coal refuse heap, reducing the hazard of the coal refuse heap on the environment, and improving the ecological environment of mining areas.

The invention discloses a performance adjustment material for activating steel slag at high temperature and the application thereof. The performance adjustment material is prepared by mixing electric arc furnace restored slag, coal slag and starch polymer or poval. The application of the material is as follows: after being mixed, the performance adjustment material and the steel slag chemically react under the action of high temperature so as to improve the hydration and the cohesive activity of the steel slag. The invention utilizes the electric arc furnace restored slag, the coal slag and a small quantity of starch polymer or poval to prepare the performance adjustment material; and the performance adjustment material and the steel slag are mixed and chemically react at the certain temperature so as to improve the hydration and the cohesive activity of the converter steel slag. After reaction, the content of free calcium oxide in the steel slag is lower than 2 percent; and when the specific surface area of steel slag powder ranges from 400 to 500m/kg after activation, the 28d activity index is higher than 85 percent. The activated steel slag powder prepared by the invention can be used as cement admixture or concrete admixture, and can be widely applied to the construction projects of industrial and civil architecture, water conservancy, roads, airports, etc.

The invention provides a planting method suitable for blueberries in south China regions and a soil conditioner, and belongs to the field of plant cultivation. The planting method suitable for the blueberries comprises the steps of adopting the soil conditioner and organic material mixtures to conduct soil improvement on a blueberry planting field, wherein after the soil improvement, the pH value of the soil is 4.4-4.8, and the organic matter in the soil is 17-24%; after laying drop irrigation pipelines in the blueberry planting field and digging planting holes, laying padding on the bottoms of the planting holes, laying basic fertilizer on the padding, and then transplanting blueberry seedlings and conducting water irrigation to fixing the seedlings; conducting field management in the later period. The soil conditioner is obtained by mixing coal waste after flue gas desulfurization, acid industrial waste of plant sources and controlled-release starch balls containing carbonic acid. According to the planting method for the blueberries, the soil of the blueberry planting field is improved, and then the later soil management is conducted, so that the survival rate of the blueberries planted in the south China regions is substantially improved, and meanwhile, the quality of the produced blueberry fruits is high.

The invention relates to a processing method of middle and low temperature coal tar. The processing method comprises the following steps: completing countercurrent contact wash and separation at least twice on narrow fraction phenol oil PO and alkali liquid SHW which are obtained by fractionating raw coal tar to obtain a water solution of oil-containing sodium phenolate and dephenolized phenol oil; washing the dephenolized phenol oil with washing water to obtain washed dephenolized phenol oil DPO and oil washing water, wherein at least part of the oil washing water is circulated to be used as the washing water, and the residual oil washing water enters an alkali washing process for the phenol oil; and further, fractionating the washed dephenolized phenol oil to obtain tower bottom residual liquid DLO the yield of which is lower than 5% and refined dephenolized phenol oil, wherein the washed dephenolized phenol oil DPO or the refined dephenolized phenol oil TDPO enters a hydro-upgrading process of the raw coal tar distillate oil, and the tower bottom residual liquid DLO enters a coking unit of raw coal tar residual oil to complete the coking process and recycle the coke products. The processing method provided by the invention has the advantages of reducing the consumption of the alkali liquid, reducing the quantity of alkali metal ions in the dephenolized phenol oil, and the like, integrates the coal tar hydro-upgrading process and the coal residual oil coking process into a combined technique, and is especially suitable for the comprehensive utilization of the middle and low temperature coal tar.

A hydraulic-loom wastewater treatment recycling method belongs to the field of a wastewater treatment recycling technology. By a method of ''oil removal+ coal slag adsorption+ coagulating sedimentation+ air floatation +mechanical filtration + recycling'', hydraulic-loom wastewater enters a grating well, an oil removal device and a gang-type coal slag oil-absorption device to carry out oil-removal pretreatment; the hydraulic-loom wastewater flows into a homogeneous regulating tank; a pump is used for lifting; sodium hydroxide, polyaluminum chloride and polyacrylamide are respectively poured into three pipeline mixers; hydraulic-loom wastewater is sent into a coagulating sedimentation device and a high-efficiency air floatation device to carry out physicochemical treatment, and an effluent flows into a middle water tank; the pump is used for lifting and the effluent is sent into a multimedium filter, a microstrainer and a security filter to carry out physical treatment, an effluent flows into a recycling clean-water basin, and the pump is used for lifting and the effluent is sent into a hydraulic-loom for recycling; separated floating oil, granular colloid and foreign materials can be doped with fire coal and the mixture is sent into a furnace to be burned; physicochemical float sludge, physicochemical mud and wash water are collected and flow into a sludge thickener; and sludge is sent through a screw pump into a sludge dewaterer for dehydration. Hydraulic-loom wastewater treatment recycling rate can reach more than 95%.

The invention discloses a method for treating low air permeability coal seam gas discharge. According to the method, holes are bored in a coal seam of a coal face, and coal seam fracturing is carried out through a borehole expansion agent to increase the coal seam air permeability for gas discharge. The method comprises the following steps: firstly, forming the boreholes in the coal seam according to the degree of freedom and the hardness of the coal seam; secondly, preparing the borehole expansion agent according to different coal seam temperatures and the characteristics of the borehole expansion agent; thirdly, purging residual coal slag and water in the boreholes in the coal seam to be clean through high-pressure air, and pressing the expansion agent into the boreholes through an extrusion pump or a grout pump to break the coal seam after the reaction of the expansion agent; finally, fracturing the coal seam through the explosion agent to increase the coal seam air permeability, thereby reducing the gas concentration.

The invention relates to water retention type humic acid bio-organic fertilizer and a preparation method. The raw materials of the fertilizer comprise decomposed coal, dried sheep manure, chemical fertilizer, bentonite, water-retaining agents and mixed microbial agents, the fertilizer is prepared through the composting process, granulation process, spray absorption functional bacteria agent process and low temperature drying process, and according to the decomposed coal in the fertilizer, by utilizing coal wastes, the recycle of the wastes is achieved; meanwhile, by using the fertilizer, the soil can be fertilized, and the drought resistance capacity of crops and yield can be improved. The water retention type humic acid bio-organic fertilizer contains abundant humic acid and functional microorganisms; the soil can be improved, and meanwhile the crop yield, the crop quality and the drought resistance capacity of the crops can be improved.

The invention provides a method for preparing inorganic slag fibers by using thermal state coal slag. According to the invention, thermal state coal slag and fly ash are produced through solid state well-mixing, and the mixture is heated to a melted state, such that melt water is obtained; the melt water is produced into filaments, such that the inorganic slag fibers are obtained. The invention is advantaged in that: the method is simple and easy to apply; the method is convenient to be put into practice; prepared inorganic slag fibers have relatively high flexibility and strength; simultaneous utilization of energy and material is realized; production cost is greatly reduced; energy consumption is low; no pollution is caused; circulation and high-efficiency utilization of resources are realized in a maximal degree. Therefore, the method provided by the invention has wide application prospect, positive social significance and positive environmental significance.

The invention discloses a coal mine deep hole water and slag drainage method and a device thereof. The method comprises the following steps: firmly connecting a drain pipe and an outlet of the body of a drainage pump and firmly connecting an outlet of a compressed air station and a compressed air spray nozzle of the drainage pump through a compressed air pipe; placing the connected drainage pump in an overhead bore hole and opening a compressed air valve; after the drainage water works normally, observing the water in the overhead bore hole on site, closing the compressed air valve when observing on water or coal slag is discharged from the drain pipe, which means water is completely drained, and taking out the drainage pump after water drainage in a deep hole is finished and placing the connected drainage pump into another overhead bore hole; and repeating the former steps. Based on turbulent dispersion of gas, liquid and solid three-phrase jet flow, the device uses compressed air supplied by a coal mine compressed air station to drainage, transmit and discharge water and coal slag in coal mine deep overhead bore hole. The device is simple, convenient and easy in operation and light and smart, and overcomes difficulties in discharge water and coal slag in coal mine deep overhead bore holes.

The invention relates to a slag-discharging system of a pulverized coal gasification furnace. A gasification chamber communicated with a feed port is arranged in the shell of the pulverized coal gasification furnace. A slag chamber is positioned below the gasification chamber and is communicated with the gasification chamber through a slag screen. The upper end of the slag chamber is provided with a chilling circular pipe for spraying chilling water towards coal slag entering the slag chamber, and the lower end of the slag chamber is communicated with a slag hole arranged at the bottom of the shell through a tapered slag hopper. The slagging system of the pulverized coal gasification furnace is characterized in that the peripheral wall of the slag chamber is provided with a plurality of water injection nozzles connected with a chilling water system. Compared with the prior art, the slagging system of the pulverized coal gasification furnace can effectively avoid slag blockage in the slag chamber, therefore, the gasification furnace can stably operate for a long term, the maintenance cost is saved, and the production efficiency is improved.