38results about How to "Reduce tailings" patented technology

The invention discloses a high-yield and low-cost subsequent filling mining method for an underground mine. An ore section is partitioned into panels (1) underground; each panel is partitioned into 3-6 continuous stopes (2) and a panel barrier (3); a panel top column (4) and a panel bottom column (5) are distributed in the vertical direction; ores (7) in panel stopes (2) fall into a stope trench (11) by blasting; a carry scraper is used for loading ores in an ore outlet feeding channel (12) through an ore outlet laneway (10), transporting the ores to a strike drive (8), and unloading the ores into a pass (14); after stoping and ore discharge are completed, milltailings are filled into a blank region through a filling laneway (15) and a pipeline to form a panel filling body (6); after the filling into the panel stopes (2) is completed, a hollow region formed by subsequent filling in an adjacent panel stope (2) is stoped; and after the adjacent panel stope (2) is filled, a part of the panel barrier (3) is recovered, and a hollow region formed by the panel barrier is filled, so that the hollow region is eliminated finally. According to the method, the mining strength can be enhanced by using limited ore distribution area, the production capacity is increased, and mining production and hollow region filling treatment costs are reduced.

The utility model discloses an improved soda lime sintering method for processing aluminum-containing raw material, and relates to the technical field of aluminum oxide production with a sintering method. The aluminum-containing raw material, limestone and soda ash are evenly mixed in a ball-milling manner according to a raw meal formula of the improved soda lime sintering method, thereby acquiring qualified raw meal; the raw meal is sintered at a high temperature, thereby acquiring sintered clinker; the sintered clinker is dissolved out, desiliconized, resolved and roasted; and an aluminum oxide product can be finally acquired. The raw meal formula of the improved soda lime sintering method is that the sum of the amount of Al2O3, the amount of Fe2O3 and the amount of SiO2 divided by the sum of the amount of Na2O and the amount of K2O is equal to 1.0 plus or minus 0.1 (a molar ratio), and the sum of the amount of SiO2 and the amount of TiO2 divided by CaO is equal to 1.0 plus or minus0.1 (the molar ratio). Compared with the prior art, the improved soda lime sintering method disclosed by the invention has great adaptability to aluminum-containing raw material in various grades, and has the advantages that the addition quantity of burdening lime stone is small, the resource utilization efficiency is high, the sintering temperature is low, the firing energy consumption is low, the firing temperature range is wide, and the industrialization is easy to implement.

A liquid discharge head is arranged in a manner that in the cross section of a discharge port in a liquid discharge direction, the discharge port includes: at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction; and the first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection.

The invention discloses an auxiliary material pushing device of a fixed-material cutting machine. The auxiliary material pushing device is arranged on a feeding device of the cutting machine and comprises a base plate, a pushing plate and a cylinder, two parallel slide rails are arranged at the top of the base plate, the pushing plate is arranged on the two parallel slide rails of the base plate in a sliding mode through two sliding seats arranged at the bottom of the pushing plate, the cylinder is fixedly arranged on the pushing plate and provided with a piston rod, the end of the piston rod is connected with the feeding device, stretching actions of the piston rod drive the cylinder to slide back and forth together with the pushing rod. According to the auxiliary material pushing device, when the feeding device pushes strip-shaped materials to tail positions, the pushing plate stretches forwards to push the strip-shaped materials to perform cutting actions continuously, residual tailings of the strip-shaped materials are reduced, and the production cost is reduced.

The invention discloses a full tailing filling method in large goafs, which is realized by the technical scheme with the following steps: dividing the combination of relatively independent and adjacent single or a plurality of goafs (6) into a filling unit; building a sealed wall (8) on a tunnel (7) at the periphery of the goafs (6) of the filling unit, arranging a drain pipe (9) in the wall body of the sealed wall (8), and arranging an ore pulp valve (10) on the drain pipe (9); laying a tailing conveying main pipe (3) above the filling unit through an adit (2) above the goafs (6); connecting each upper opening of the filling unit to one or a plurality of hydraulic sand filling pipes (4) through the tailing conveying main pipe (3); and discharging sand at high levels, discharging water in different middle sections, and filling alternately. In the invention, full tailings are used for filling the existing goafs, thereby eliminating the potential safety hazards of the goafs, ensuring the normal production of large deep well mines, saving the treatment cost, the tailing stockpiling and land acquisition cost and the drainage cost of the goafs, realizing the purpose of less-waste and no-waste exploitation, and taking an demonstration effect on constructing ecological mines.

The invention relates to the technical field of pipe clamps, in particular to a claw-free chuck for clamping pipes. A through hole accepting penetration of the pipes is formed in the middle of a main plate, and the main plate is provided with a claw-free clamp capable of clamping the pipes and enabling the pipes to slide in the through hole in the axial direction of the center of the main plate. According to the claw-free chuck for clamping the pipes, claws and clamping bases pushing the claws are eliminated, and therefore the thickness of the claw-free chuck for clamping the pipes is reduced, the self weight of the chuck is lowered, and feeding waste of the pipes is reduced; because the claws are eliminated, the problem that claw handles extend out of the maximum diameter part of the chuck (namely the main plate) is avoided, the installation space of the chuck is greatly reduced, the manufacturing cost of the chuck is greatly reduced, and the stability is high; pipe loads are retained by screw rods firstly, worm motors just need to bear small retaining force, and gearboxes of the worm motors are protected against damage caused by overload due to the two-stage retaining function. In addition, the claw-free chuck is simple in structure, small in size and light in self weight and has full stroke.

The invention relates to a gradient utilization method of high-sulfur low-silicon iron tailings. The gradient utilization method comprises the following steps: (1) sieving by utilizing a 60-80-mesh sieve, wherein about 70% of tailings are remained on the sieve, and about 30% of tailings are sieved; (2) preparing a standard cement mortar product from the about 70% of rough tail sand on the sieve instead of 50-60% of river sand; and (3) separating 6.14% of sulfur ore concentrate from the about 30% of sieved fine tailings by virtue of flotation desulfurization so as to prepare sulfuric acid, carrying out iron separation on 24.6% of fine sand by utilizing a strong magnetic separation technique after the sulfur separation, preparing a high-activity tailing slag admixture by utilizing the residual 7.14% of high-silicon-content tail sand after the iron separation, and directly utilizing 17.47% of high-iron-content tail sand separated through the strong magnetic separation as a raw material to sinter cement in a cement plant, wherein the sulfur grade of the sulfur ore concentrate reaches 44.65%, and the iron grade of high-content iron slag remained after the sulfuric acid preparation reaches 63%. According to the gradient utilization method, the utilization range of the iron tailings is extended from barren rock and iron tailing sand obtained in a mountain cutting process to the tailing slag admixture, so that 100% gradient utilization of mine waste is realized.

A storage hopper temporarily stores articles supplied from above and then discharges the articles downward. The storage hopper includes a holding member of an article holding change mechanism in a storage portion. The holding member changes a state in which the articles are held in the storage portion according to a state of the articles.

The invention provides a method for backfilling a land collapse pit of a mine subjected to caving mining by utilizing tailings. The method comprises the steps that (1) a collapse pit mill tailing backfill material is prepared, specifically, binding materials and mill tailings are mixed and stirred at the proportion of (1:6)-(1:8), and the concentration of backfill slurry can reach over 65%; (2) backfill zoning is conducted on the mine land collapse pit; (3) a solidified tailing slurry single-point piling and discharging flowing average expansion radius is determined, specifically, the solidified tailing slurry single-point piling and discharging flowing average expansion radius is determined to be 20 m; and (4) backfill material solidifying is conducted, specifically, tailing solidifying and backfilling units are arranged along the boundary arc length of a piled and discharged position of a semi-secure area at intervals of 20 m when on-site piling and discharging are conducted, the prepared backfill material is directly discharged into the designated backfilling units, the one-time piled and discharged thickness is (4.59-4.59 m)-9.78 m, the solidifying time lasts for 14 days, and circulation backfilling is conducted. According to the method, potential safety hazards of a tailing pond can be avoided, a lot of lands can be saved, meanwhile the problem of safety of a land collapsearea is solved, and the engineering amount and the cost of mine terminal-stage management of geological disasters are greatly reduced.

The invention discloses an arbidole granule preparation and a fluidized-bed coating preparation method thereof. The direct granulation of powder in a fluidized bed improves fluidity and reduces fly ash. The fluidized bed equipment is provided with discharge holes to eliminate explosion hazards. The coating process is performed in a closed system without leakage risk. The equipment has no dead angles, rapid discharge, easy cleaning, and compliance to the GMP standards. Compared with the prior art, the preparation method has simple process, high product quality, short production cycle and low production cost.

A performance enhanced snowboard having an extended, generally planar deck with a nose, a tail, and a central section. The deck also has an overall length, a top surface, and a bottom surface. The nose has a widest portion that defines a nose chord line having a nose chord length. The tail has a widest portion that defines a tail chord line having a tail chord length, and the central section has a narrowest portion that defines a central chord line having a central chord length. The nose chord length is greater than the central chord length, and the nose chord length is between about fifteen and thirty-five percent of the overall length of the deck. The tail chord length is between about one percent and ten percent greater than the central chord length, while the distance between the tail chord line and the central chord line is between about forty to ninety percent of the distance between the nose chord line and the central chord line. The structure permits the invented board to function like a surfboard or skateboard while also sliding like a conventional snowboard.

The invention discloses a sedimentation device for sewage treatment. The sedimentation device includes a supporting pedestal, a sedimentation chamber, a material guiding pipe, a feeding hopper and discharge pipes; the sedimentation chamber is mounted on the supporting pedestal and has a cylindrical cavity body structure having the bottom tilted to a sewage draining port; the inner wall of the sedimentation chamber is provided with guide plates A in an tilting manner; guide plates B are arranged between the guide plates A and are mounted on the material guiding pipe in an tilting manner; the material guiding pipe is mounted on the feeding hopper; the feeding hopper is mounted at the upper edge opening of the sedimentation chamber; the discharging pipes are mounted below the upper edge opening of the sedimentation chamber; the sedimentation chamber is provided with exhaust ports; the exhaust ports are located above the discharging pipes. A tank body and the material guiding pipe are adopted, and the guide plates A and the guide plates B are respectively mounted on the tank body and the material guiding pipe in the titling manner, so that the sewage flow rate is reduced, the particle adhesion area is increased, the sedimentation time and the drug use amount are reduced, the production cost is lowered, and the production efficiency is improved.

The invention discloses a novel winding cutting knife device. The novel winding cutting knife device comprises a machine frame, a flat pushing pressing roller device, and a cutting knife assembly, wherein moving plates are arranged on two sides of the machine frame; the flat pushing pressing roller device and the cutting knife assembly are arranged on the moving plates; the cutting knife assembly comprises two groups of cutting knife mechanisms which are oppositely arranged above the flat pushing pressing roller device and under the flat pushing pressing roller device; each of the cutting knife mechanism comprises a cutting knife and cutting knife bases positioned at two ends of the cutting knife; a pushing mechanism is arranged on the cutting knife bases; two groups of guiding plates corresponding with the cutting knife mechanisms are arranged on the machine frame, and are oppositely arranged. When a printing material needs to be cut, the moving plates are moved forward; the guiding plates guide the cutting knife bases and the cutting knives to rotate around a rotating shaft; the cutting knives of the two groups of the cutting knife mechanisms relatively rotate in a closing manner; the flat pushing pressing roller device is in contact with an air bulking shaft; the two groups of the cutting knives are relatively oblique and close to the printing material, and then the two groups of the cutting knifes are pushed to move forward and fit cut, so that the printing material can be cut off. According to the novel cutting knife device disclosed by the invention, the swinging range of each of the cutting knifes is small, tail materials are shortened, the waste is reduced, besides, the cutting knifes stably move, the positioning accuracy is high, the tensile force fluctuation of a film is small, and the printing material is not liable to wrinkle.

A process of obtaining powdered sodium silicate from sand tailings generated from iron ore processing addresses the production of raw materials used in the manufacturing of geopolymers to be employed mainly by the construction industry and in road paving. The utilization of this tailing reduces environmental impact generated by the disposal in large dams, as well as enabling addition of value to a tailing by obtaining a commercially applicable product.

Device for embedding a thread in a rubber profiled element comprising: a continuous thread feeder arranged on a structure, a moving support able to run along the structure between a raised and a lowered position. A hollow needle, comprising a canal in which the thread runs is fixed by one of its ends to the base of the moving support in the duct, and a tip at its other end capable of penetrating the rubber profiled element, a cutter arranged on the structure, comprising a rotary blade able to cut off the thread at a given distance from the tip of the needle upon each cycle of reciprocating movement of the needle. The cutter comprises a paddle arranged behind the cutting wire of the blade and intended to fold the tail around the tip of the needle just after the thread has been cut by the blade.

The invention discloses an oil cylinder pressing guide reinforcing structure. The oil cylinder pressing guide reinforcing structure comprises a clamping oil cylinder and a guide mechanism arranged onthe clamping oil cylinder, wherein the guide mechanism comprises a guide sleeve, a guide bar and a guide key; the guide sleeve is connected to a piston rod of the clamping oil cylinder in a sleeved mode; the bottom end of the guide sleeve is connected to the clamping oil cylinder; a through hole is arranged in the guide sleeve; the guide bar is inserted into the guide sleeve and connected to the piston rod; a chute is arranged in the guide bar; a pressing block is arranged at the top end of the guide bar; the guide key is arranged in the through hole and fixedly connected to the guide sleeve;and one end of the guide key penetrates through the through hole, extends into the guide sleeve and abuts against the chute in order to drive the guide bar and the pressing block to do linear reciprocating motion in the guide sleeve through the piston rod under the limit of the guide key. The oil cylinder pressing guide reinforcing structure is easy to operate, small in horizontal area and capableof effectively increasing the clamping rigidity, improving the machining precision, shortening the clamping distance, reducing tailings and improving the production benefit.

The invention discloses a pipe clamping device and a pipe cutting machine. The pipe clamping device comprises a base frame, a first clamping structure, a second clamping structure, a telescopic mechanism and a supporting and fixing mechanism, and a long-strip pipe to be machined is placed between the first clamping structure and the second clamping structure; the first clamping structure and the second clamping structure can abut against the inner side edges of the two ends of the pipe correspondingly, so that the pipe is clamped and fixed, the telescopic mechanism drives the supporting and fixing mechanism to move and stretch into the pipe, and the supporting and fixing mechanism abuts against the inner wall of the pipe so that supporting and bearing can be provided for the middle position of the pipe; therefore, shaking of the pipe is reduced, more stable clamping of the whole to-be-machined pipe is achieved, the cutting machining precision is guaranteed, the first clamping structure, the second clamping structure and the supporting and fixing mechanism all act on the inner side of the pipe, the pipe clamping and supporting occupy few pipe positions, the appearance of the pipe can be prevented from being damaged, tailings can be reduced, and the cost is saved.