344results about How to "Improve resource recovery" patented technology

The invention discloses applicable classification method for mining under the shallow bedrock of thin seam keeping water conditions. Apply to thin seam overlying shallow bedrock aquifer water loose the protection of water resources. At first according to the feature of structure or Shallow bedrock, the height of leading water crevasse under different mining height is analyzed and calculated. The estimate formula: HL=9.29M+10.6 can be used to determine the height HL of leading crevasse water under the shallow bedrock of thin seam to the different mining height M. The mining waterproofing security coal rock pillar protector thickness of the thin bedrock shallow submersion coal bed long well working surface is 10 m. According to the classification situation of loose water-bearing stratum water body, the bedrock thickness which is needed is determined under the condition of different mining height. According to classification situation and mining height, mining is separated into reinsurance water mining according to the bedrock thickness. This method has good water resources protection effect, is safe in production, and has high coal resource returns-ratio.

The invention relates to a long-wall coal method, which can be used in stable coal bed, rigid top plate, non-broken incline middle-thickness coal bed, and thick coal bed layered long-wall method. Wherein, it arranges hydraulic support, scrape transporter, and roller coal machine at the long-wall working surface; arranges groove transporter and flexible band transporter at the transport channel; the working surface has ultra long length, which is two times of integrated coal surface; it uses two coal machines on one scrape transporter, to scrape the upper half surface and the lower half surface; and it can arrange middle channel at the middle of integrated surface as the transport channel; and arranges scrape transporters at the upper and lower half working surfaces. The invention has high efficiency, while it can reduce the digging rate and improve the resource recycle rate.

The invention discloses an inclined separated layer solid filling coal mining method for a super thick coal seam, which is suitable for the exploitation of an 'under three' super thick coal seam. The method comprises the following steps: determining the number of inclined separated layers according to the principle that thickness of each separated layer is 2.5-4.5 m; adopting a exploitation sequence that mining layer by layer, and filling at a next row; arranging tunnels and equipment according to the conventional solid filling coal mining method; carrying out a circulating sequence that coal mining firstly, metal nets and bamboo fences paving secondly, and filling finally to complete the filling exploitation of a first mining surface and a first separated layer; meanwhile, mining according to the same filling coal mining method under the shield of a manual false roof formed by the first separated layer at the corresponding position of a second separated layer 4 months after a working face of the first separated layer finishes mining; circulating in the way that the exploitation of one separated layer is performed under the shield of a manual false roof manufactured by an upper separated layer continuously until the whole super thick coal seam is mined out. Through the adoption of the method, resources of the 'under three' super thick coal seam can be utilized, the rock formation movement and earth surface sinking can be effectively controlled; and the recovery ratio is high, the production efficiency is high, the cost is low, and the method has wide practicability in the field of thick coal seam filling exploitation.

The invention relates to a rectification-steam penetration-coupled organic solvent dewatering method and a rectification-steam penetration-coupled organic solvent dewatering device, belonging to the technical field of separation. The rectification-steam penetration-coupled organic solvent dewatering method comprises the step of sending an aqueous organic solvent into a rectifying tower, wherein at least one part of steam at the top of the rectifying tower is not condensed and is directly separated by a steam penetrating device, a penetrated side is water and an intercepted side is organic solvent. The rectification-steam penetration-coupled organic solvent dewatering device comprises a raw material tank, a raw material pump, a preheater, the rectifying tower and the steam penetrating device which are sequentially connected, wherein the top of the rectifying tower is directly connected with the steam penetrating device. Compared with the prior art, in the organic solvent dewatering process, a third component is not added, so that environmental pollution caused by the third component and the retreatment cost of the third component are eliminated, an azeotropic rectification process and an extractive rectification process are omitted, condensation of a product at the top of the rectifying tower and re-evaporation in the steam penetrating device are omitted, energy consumption is lowered and the product quality is improved.

The invention relates to a coal mining method for a high-dipping low coal seam by long-wall mining. The method comprises the following steps of: supporting a roof by a self-advancing air bag support; arranging a working surface in a mode of advancing to the dip; mining coal by drilling and blasting or using an off-pan shearer; transporting the coal in a mode of gravity haulage; filling a goaf with gangue or sand; and filling a lower end with gangue bags, precast concrete blocks or solidified macromolecular foaming slurry. The coal mining method has the advantages of realizing mechanical coal mining for the high-dipping low coal seam, improving the yield per unit and efficiency of the working surface, effectively protecting the exploited ground, improving the recovery rate of mines, and guaranteeing the coal seam mining safety.

The invention discloses a method for recycling iron phosphate and lithium carbonate from lithium iron phosphate waste. The method comprises the following specific steps: (I) oxidizing roasting; (II) carrying out pole piece cleaning; (III) adding phosphoric acid and performing ball-milling activation; (IV) performing acid pickling to separate FePO4; and (V) precipitating lithium of the filtrate to obtain a target object Li2CO3. The method disclosed by the invention has the following advantages: the P, Fe and Li resources in the lithium iron phosphate waste can be fully utilized to prepare iron phosphate and lithium carbonate products with high added value, no waste of Fe is generated, the resource recycling rate is high, the technological process is short, the reaction system is simple, a few raw materials are consumed, the cost is low, the product value is high, and the method is very suitable for industrial scale production.

The invention discloses a mining method employing a solid filling and fully-mechanized coal mining hybrid working face, namely a method for carrying out coordinated and combined mining by combining solid filling with fully-mechanized coal mining on the same coal face. Coal mining is carried out by adopting a strike retreating-longwall mode; coal cutting, coal charging and coal handling procedures are the same as those of a fully-mechanized coal mining process; a solid filling section of the hybrid working face is used for supporting a roof by virtue of a filling and mining hydraulic support; solid filling materials are backfilled to a goaf management roof by virtue of a porous hopper conveyor which is suspended behind and below of the filling and mining hydraulic support; a fully-mechanized coal mining section is used for supporting the roof by virtue of a fully-mechanized coal mining hydraulic support; the goaf is managed by adopting a caving method. The mining method is beneficial for giving play to dual advantages of solid filling and fully-mechanized coal mining; the problem of environmental pollution caused by accumulation of solid wastes such as gangue, coal ashes and construction wastes on the ground is reduced by solid filling; the working face is lengthened by combining with fully-mechanized coal mining; tunneling of a mining roadway is reduced; the single yield and single effect of the working face are improved; the requirements of a modern mine on production capacity are met.

The invention provides a coal mining method of fully-mechanized caving mining with large mining height in a super-high seam, a coal caving process, reasonable type of a support, production capacity of equipment, comprehensive control measures of coal wall spalling of working face, a technical route for improving the recovery rate of the fully-mechanized caving face with the large mining height, and feasibility evaluation indexes (thickness of the seam, top coal cavability, coal wall stability and roof pressure strength) of the fully-mechanized caving mining with the large mining height, and further forms a whole set of fully-mechanized caving mining process technology with the large mining height. The coal mining method is that the coal cutting height is 4.2-4.8m; the length of the working face is 200-280m; and the web of a coal mining machine is 0.8-1m. The process technology can increase the coal cutting quantity by 43%, shorten the coal caving time by 9%, relatively reduce the coal caving quantity by 9%, improve the resource recovery rate by 5% and reduce the mining-caving ratio to below 1:3 by increasing the coal cutting height, and can further realize the relatively balanced production of mining and caving of the working face.

The invention relates to a wastewater integrated treatment and comprehensive utilization device and application thereof. A method for the wastewater integrated treatment and comprehensive utilization comprises the following steps: firstly leading the wastewater into an oil interceptor tank and then into an equalizing tank; leading the wastewater after neutralization regulation into a biochemical treatment tank where a sump pump and an aeration device are arranged; leading the wastewater after the biochemical treatment into a sedimentation tank; leading the sedimentated wastewater into a filter tank with built-in filler for the filtration treatment of the wastewater; arranging a back flushing device or filtering material regeneration device beside the filter tank; leading the water outputted from the filter device into an advanced treatment tank to obtain the reclaimed water up to the standards; leading the reclaimed water into a reclaimed water tank where a liquid level controller is arranged for controlling the liquid level; and lifting the rest sludge in the sedimentation tank to a sludge drying compost tank, and carrying out the moderate temperature and high temperature composting of the rest sludge through a temperature controlled heating device. The integrated device is enveloped by an insulating layer formed by polyurethane sandwich boards. The invention provides an integrated device which has the advantages of modularized unit structure, high treatment efficiency, strong self control, wide adaptability, less investment and convenient motion and transportation.

The invention discloses a process method for producing fluorine compounds and silicon compounds by cleanly utilizing fluosilicic acid. The process method comprises the following steps of: preparing fluosilicic acid as a phosphorus chemical by-product into an anhydrous aluminum fluoride product, a sodium fluoride product and a cryolite product, and combining with other industrial waste silicon slags and aluminum slags to prepare a 4A zeolite product. The process method comprehensively utilizes the fluosilicic acid and has high resource recovery rate, wherein the recovery rate of the fluorine element reaches higher than 90 percent. Waste silicon dioxide slags generated in the process can be recycled to produce white carbon black and the 4A zeolite, and a mother liquor, a cleaning solution and waste gas which are generated in the production process are all recycled, thereby the environmental pollution is reduced, and the purposes of zero emission and no pollution are truly achieved, thus the method completely meets the requirement for clean production. The invention has the advantages of advanced production process, good product quality and high value, wherein the fluorine content of the aluminum fluoride is high and between 63-65 percent; the quality index of the obtained white carbon black meets the requirement on the standard of the chemical industry; and the quality of the 4A zeolite product meets the requirements on the national standard and the standard of European and American developed countries.

The invention discloses a pyrolysis based resource reclaiming process of a waste circuit board, belonging to the technical field of waste resource reclamation and recycle. The method comprises the following steps: placing a waste circuit board with an electric element detached in a pyrolyzing furnace for thermal cracking; collecting pyrolyzed oil, pyrolyzed gas and pyrolyzed residues generated in the pyrolyzing process; directly introducing the purified pyrolyzed gas serving as gas into a pyrolysis system to provide energy for the pyrolyzing process; polymerizing the pyrolyzed oil and formaldehyde to synthesize pyrolyzed oil-phenolic aldehyde resin; selectively synthesizing carbon functional materials with different shapes and structures by using the prepared pyrolyzed oil-phenolic aldehyde resin as precursor; peeling glass fiber in the collected pyrolyzed waste circuit board residues from a metal layer, and reclaiming glass fiber cloth and metal; and removing carbon on the surface of the separated glass fiber by adopting a partial oxidization method, and preparing a veneer sheet together by the carbon and the synthesized pyrolyzed oil-phenolic aldehyde resin. The process ensures that material reclamation in the waste circuit board forms a closed circulation system, and has high resource reclamation rate.

The invention provides a blast-winning, coal loading, coal conveying and anchor rod-timbering mechanical integrated operating method and device. And the device mainly comprises: hydraulic system, hydraulic control table, track walking part, coal loading and conveying part, timbering part, and hydraulic anchor rod machine, and the method uses integrated device, scraper conveyor and gate coal conveyor; and its drivage circulating speed is 1m to 1.5 m, blast-winning and after the fumes have settled, making the integrated device enter into the operating site, and after completing coal loading and conveying, making anchor rod timbering; after completing the anchor rod timbering operation, making the integrated device exit the operating site and over 20 meters distant from the operating site, and then making drilling and blasting operation. And it improves explosion level of blast winning and resources recovery, and reduces operators.

The invention provides a pack recovery method without coal wedge. It contains the following technologies: set up coal wedge, drilling along and vertical space, stoping coal wedge, ventilation system, engaging measure, safe and transport measure. Construct and drill round hole along the gob brim of picked working face on afterbody of working face and drill holes along the roof by drilling along space. 1-3 round holes are taken as circulating holes of stoping working face. Drilling vertical space drills holes connecting with drilling along space in track tunnel. The number of holes is same as that of drilling along space. The invention arranges ventilating holes along the gob brim, which can avoid and weaken the influence of fixed stay pressure, replace remaining and digging tunnels along space and improve the recovery rate of coal resource. It reduces quantities and maintenance of tunnel driving. The drilling along space is safe, highly active and has low-loss.

The present invention discloses a desulfurization wastewater treatment system and a desulfurization wastewater treatment method. The desulfurization wastewater treatment system comprises: a wastewater buffer pool, wherein the water inlet is connected with the outlet of an apparatus for producing desulfurization wastewater; a sludge pressing device, wherein the input end and the water outlet of the wastewater buffer pool are connected; a multi-stage treatment pool, wherein the water inlet is connected with the water outlet of the sludge pressing device; a clarification pool, wherein the water inlet is connected with the water outlet of the multi-stage treatment pool; and a pH value re-adjusting box, wherein the water inlet is connected with the clear water outlet on the upper portion of the clarification pool. The invention further provides a wastewater treatment method adopting the system. According to the present invention, the wastewater treatment method is particularly suitable for pellet flue gas wet desulphurization wastewater, the process is simple, the solid content in the system is low, the operating cost is reduced while the desulfurization by-product gypsum and the slow-release fertilizer can be recycled, and the final effluent meets the national discharge standard.

The invention relates to a large-structure sublevel drilling stage ore removal mining method with delayed filling. The mining method comprises stoping in stopes and bottom structure recovery which are carried out synchronously in a crossed manner, and comprises the following steps: step 1, stoping in odd-numbered stopes, wherein the stoping manner is sublevel drilling stage ore removal, and mined out space I is not filled immediately; step 2, stoping in 1/2 bottom structures I corresponding to the odd-numbered stopes, and filling ore rooms and the mined out space I, corresponding to the 1/2 bottom structures I, of the ore rooms after stoping is finished; step 3, stoping in even-numbered stopes, wherein mined out space II is not filled immediately; step 4, stoping in 1/2 bottom structures II corresponding to ore pillars, and filling the ore pillars and the mined out space II, corresponding to the 1/2 bottom structures II, of the ore pillars after stoping is finished. The mining method has the advantages that the mining-cutting work amount is reduced greatly; the production capacity of a single stope is high; the efficiency is high; workers' labor intensity is low; production, dispatching and management are simple. Moreover, stoping of the main ore in a stope and recovery of ore in the bottom structure of the stope are realized synchronously in a crossed manner, and the stoping operation is safe, so that the resource recovery rate is high.

The invention relates to the technical field of coal mining, in particular to a method and device for optimizing a mining stopping line position with hydrofracture pressure relieving. The method for optimizing the mining stopping line position with hydrofracture pressure relieving comprises the following steps that the geological state of a working face is obtained, and structural data of a roof rock layer is determined; according to the structural data, holes are obliquely drilled towards a roof from a mining roadway and are drilled at a preset distance in the length direction of the mining roadway, and thus a plurality of hydrofracture pressure relieving holes arranged in sequence are obtained; hydrofracture pressure relieving treatment is carried out on multiple preset positions of each hydrofracture pressure relieving hole to form multiple cutting cracks; the roof rock layer is cut off along the cutting cracks of all the hydrofracture pressure relieving holes. By means of the method and the device, the influence of the advanced supporting pressure of the working face to the mining roadway can be effectively reduced, transferring of the prestress of the roof and weakening of surrounding rock can be achieved, the purpose of reducing and optimizing the mining stopping line position of the working face can be achieved, and the recycling rate of coal resources can be increased.

The invention discloses handling method and device for a double-medium stacked supporting and hard top plate type mined-out area, and aims at solving the construction problem that the hard top plate of a thick coal mine seam is difficultly fallen. The method is that a base stack body fills in the mined-out area after the mining at the working face; the base stack body and the top plate are subjected to flexible roof contact by filling chemical materials; the spacing and arrangement distance of the filled stacks are influenced by the mining depth, height and lithology of the top plate and other factors, wherein the arrangement distance is 15 to 30m, and the spacing is 8 to 15m; the section of the filled stack can be circular, rectangular or quadrate; the effective section area is 0.8 to 1m<2>; the flexible roof contact medium is 1/10 to 1/8 of the mining height; the base stack can be filled by grouting concrete or gravels and other materials. The method and device are particularly suitable for continuous mining of shallow buried thin coal seam layers; the design that the working surface is frequently moved while supporting the mined-out area through tool posts is replaced, or the complex processes of softening the top plate by filling water and blasting and pre-cracking are decreased.

The invention relates to a smoke gas desulfurization and recycling method; the smoke gas is processed in an smoke desulfurization and recycling integrated device; the smoke gas desulfurization and recycling technology has three stages: a first stage is an exhaust gas dedusting technology, by which particulate matter in the smoke gas is removed; a second stage is an exhaust gas desulfuration technology, by which SO<2>/SO<3> is removed; a third stage is a post-processing technology, by which the exhaust gas is dried and purified and manufactured into a product; and waste seriflux is made into gypsum after being oxidized; the smoke gas desulfurization and recycling method and the device of the invention are suitable for processing the smoke gas containing the SO<2>/SO<3> produced in various industrial production processes and recycling a material, thereby taking full advantage of a resource, decreasing pollutant emission and having the advantages of high processing efficiency, high coefficient of recovery, wide adaptability and smaller investment.

The invention provides an equipment matching method for a solid-filling coal face of a coal mine and belongs to coal mining with filling methods. According to the equipment matching method, equipment is composed of a coal cutter, a scraper conveyer, a milling with filling hydraulic support, a coal conveying device, a machine head, a drive motor, a machine head lifting platform, a gangue belt conveyer, a self-moving transfer conveyer, a machine tail, a machine tail lifting platform, a punning mechanism and a conveyer middle section, wherein the coal cutter, the scraper conveyer and the milling with filling hydraulic support are arranged on the coal face; the coal conveying device, the machine head, the drive motor and the machine head lifting platform are arranged in a coal conveying roadway; the gangue belt conveyer, the self-moving transfer conveyer, the machine tail and the machine tail lifting platform are arranged in a gangue conveying roadway; the punning mechanism and the conveyer middle section are arranged in the milling with filling coal face. The conveyer middle section and the punning mechanism are arranged on the rear portion and the bottom of the mining with filling hydraulic support respectively. The self-moving transfer conveyer is in lap joint with the gangue belt conveyer and the machine tail. The machine tail is arranged on the machine tail lifting platform. The machine head and the drive motor are arranged on the machine head lifting platform. A delayed shoring method is used for achieving management of a coal face transition section. By the adoption of the equipment matching method, integrated operation of filling and mining of a comprehensively mechanical solid filling work face is achieved, and the recovery rate of a resource exhaustion type mine is greatly increased.