1149 results about "Roller mill" patented technology

The invention discloses a preselecting method of low-grade magnetic iron ore, comprising the steps of crushing the raw ore of the magnetic iron ore by coarse crushing, intermediate crushing and fine crushing operations, conveying to subject to ultra-fine crushing operation, and then crushing by a high-pressure roller mill, scattering the crushed product by a wet cylindrical sieve, conveying the ore on the cylindrical sieve to the vibrating sieve by a belt to perform wet gradation, conveying the ore on the vibrating sieve to a dry magnetic separator by the belt to discard the waste, returning the ore concentrate of the dry magnetic separator to the high-pressure roller mill to crush the ore concentrate again, perform magnetic separation and discarding tailings of the ore concentrate below the vibrating sieve and the ore concentrate below the cylindrical sieve in a wet coarse grain intermediate-field intensity magnetic separator, and selecting the coarse ore concentrate of the intermediate-field intensity magnetic separator by a grinding separation technology. The invention has the advantages that the invention selects quantities of qualified mine tailings by wet magnetic separation before grinding ore, reduces ore grinding work, reduces ore grinding energy consumption and has high system processing capacity; the invention can be widely used in magnetic ore dressing plant, and in particular suitable for treatment of preselecting low-grade magnetic iron ore with the iron grade lower than or equal to 22%.

The invention discloses a high-heat conductivity coefficient graphite heat-radiation adhesive tape. The high-heat conductivity coefficient graphite heat-radiation adhesive tape comprises a graphite layer. A metal layer is coated on an upper surface of the graphite layer. A heat-radiation adhesive layer is coated on a lower surface of the graphite layer. The graphite layer is prepared by adding ethylene glycol or triethylamine into a polyamide acid solution, heating to a temperature of 300 DEG C to obtain a polyimide film, heating the polyimide film to a temperature of 250 DEG C, heating to a temperature of 1200 DEG C to obtain a pre-sintered carbonized film, rolling the pre-sintered carbonized film by a roller mill, heating to a temperature of 2400 DEG C, heating to a temperature of 2900 DEG C to obtain a mainly sintered graphite film, and rolling the mainly sintered graphite film. The high-heat conductivity coefficient graphite heat-radiation adhesive tape has high heat conduction performances in vertical and horizontal directions, avoids adhesive tape local overheating and realizes uniformity of adhesive tape heat conduction performances.

The invention discloses a preparation method of a mixed filling type thermal conductive silicone rubber composite. Raw materials comprises the following components, by mass, 100 parts of raw silicone rubber, 10 parts of white carbon black, 1 to 3 parts of hydroxy silicone oil, 100 to 200 parts of a thermal conductive filler, 2 to 4 parts of a silane coupling agent and 2 parts of a di-2,5-vulanizator. The preparation method comprises the following steps: adding raw silicone rubber to a double roller mill; adding white carbon black, the thermal conductive filler, the silane coupling agent and hydroxy silicone oil according to a formula design after roller packaging; adding a peroxide vulcanizer after repeatedly and uniformly mixing; mixing uniformly to obtain mixed silicone rubber; putting in a die and carrying out first-stage vulcanization after cold pressing mold filling; and putting a molded sample in an air blasting drier and carrying out second-stage vulcanization to obtain a finished product. In the present invention, mixed particles of SiC and AlN are employed to fill high temperature vulcanized silicon rubber, effective thermal conductive net chains are formed in silicone rubber matrixes, so the obtained heat-conducting silicone rubber composite material has a good heat conducting performance.

The invention discloses a high-pressure roller milling-preselection processing method for vanadic titanomagnetite. The raw ore is subjected to coarse crushing, secondary crushing, fine crushing and high-pressure roller milling superfine crushing, an open circuit crushing, scrap circulation crushing or fully-closed circuit crushing method is adopted, and low-intensity magnetism and high-intensity magnetism preselection is performed. The method disclosed by the invention reduces the energy consumption of crushing and ore milling and improves the ore selection efficiency in comparison with the conventional process; and the low-intensity magnetism and high-intensity magnetism preselection can separately select the main target ores-titanomagnetite and ilmenite in the vanadic titanomagnetite with higher pertinence, and the ore selection flow is simpler. By adopting a high-pressure roller mill as the superfine crushing apparatus after fine crushing, the particle size of the final crushed product can be reduced, and meanwhile, the preselection tailing discarding before milling is realized, the milling grade is improved and the energy consumption of ore milling is reduced. Compared with the traditional process, the particle size of the product is small, the equipment operation rate is high, and the unit crushing energy consumption is low. Meanwhile, the superfine crushed product can besubjected to preselection tailing discarding so as to improve the milling grade, reduce the energy consumption of ore milling, lighten the burden on subsequent selection process and improve the production efficiency.

The invention relates to a high-thermal conductivity conductive silver adhesive and a preparation method thereof. The conductive silver adhesive is prepared from the following raw materials in percentage by weight: 14-28% of organic silicon resin or epoxy resin, 0.14-1.4% of curing agent, 0.5-1% of graphene, 70-85% of conductive filler, 0.15-1.5% of diluent and 0.05-1% of reinforcing agent. The preparation method comprises the following steps of: (1) mixing the organic silicon resin or epoxy resin with the curing agent to obtain matrix resin; (2) mixing graphite and organic solvent, and performing centrifugation and distillation to obtain a graphene solution; (3) mixing the conductive filler, the graphene solution and the organic solvent, and performing centrifugation and drying to obtain the mixture of the conductive filler and graphene; and (4) mixing the mixture of the conductive filler and graphene with the matrix resin through a three-roller mill, and adding the diluent and the reinforcing agent to obtain the conductive silver adhesive. Compared with the prior art, the high-thermal conductivity conductive silver adhesive provided by the invention has relatively high electric conductivity and high thermal conductivity; and the highest using temperature of the conductive silver adhesive can reach 300 DEG C.

The invention discloses a dry-grinding and dry-separation method of magnetite, which comprises the following steps of: feeding the crude ore of magnetite into a crusher for coarse crushing, and then feeding the crushed magnetite into a vibrating sieve for sieving; controlling the sieve meshes within a range of 35-75 mm; feeding the oversize product to the crusher for intermediate crushing and then feeding the crushed oversize product into a high-pressure roller mill along with the undersize product for fine crushing; breaking and grading the fine-crushed ore by a breaking-grading machine, thereby obtaining the products of three grain grades, i.e. coarse grains, fine grains and fine powder; returning the coarse-grain grade product to the high-pressure roller mill through an elevator, and feeding the fine-grain grade product to a dry type magnetic separator for magnetic separation and discarding tailings, wherein the magnetic field intensity is controlled within a range of 1200-3000 Gs; directly dryly stacking the discarded fine-grain grade tailings, and returning the fine-grain grade concentrate to the high-pressure roller mill through a belt conveyor and the elevator to form a closed loop; and feeding the fine-powder grade product into a cyclone magnetic separator, wherein the magnetic field intensity is controlled within a range of 600-1200 Gs, thereby obtaining concentrate or semi-concentrate. The dry-grinding and dry-separation method is low in power consumption, steel consumption and water consumption, and the tailings are easy to be disposed of.

The invention discloses an ethylene propylene rubber insulation material for longitudinal high-voltage watertight cables of ships and warships and a production method thereof. The method comprises the following steps: adding the ethylen e-propylene-diene mischpolymere, age resister and fire retardant into a banbury for banburying for 3.5min; adding argil, white carbon black and paraffin wax for continued banburying for 2min; adding active agent, and discharging after banburying for 1.5min; filtering the rubber compound with a three-layer filter screen (namely a 60 mesh filter screen, a 60 mesh filter screen and a 80 mesh filter screen) on a rubber filter; and beating into cornucopla on a double-roller mill, adding vulcanizer and co-crosslinker, then beating into cornucopla for 7 times, grinding and slicing after finishing the steps, and then cooling, wherein the materials are as follows in parts by weight: 100 parts of ethylen e-propylene-diene mischpolymere, 1-5 parts of vulcanizer, 1-4 parts of age resister, 15-70 parts of fire retardant, 0.5-10 parts of active agent, 10-20 parts of argil and 2-4 parts of paraffin. The prepared insulation material has the characteristics of low smoke, no halogen, fire resistance, high machinery strengthen, and high insulation resistance, good flexibility, elasticity and viscosity, and can be used for the ships and warships.

The method of manufacturing laminated super capacitor includes such steps: coating mixed pulp prepared from carbon active material, conducting agent, cementing material, and solvent onto surface of metal body of collecting current by using flow casting machine or coating mould; carrying out rolling, drying and cutting operations on automatic temperature-controlled reduction roller mill so as to obtain electrode in carbon active material; single super capacitor is made after stacking bodies of collecting current of positive and negative electrode as well as porous isolation membranes, then adding electrolyte and sealed; cascaded and paralleled more single capacitor produces super capacitor with higher voltage and high capacity. The invented capacitor provides features of high power density, stable cycle performance and low expansivity of electrode.

The invention relates to a dry presorting and tailings discarding process for ultra-poor magnetite, belonging to the technical field of magnetite presorting. The process comprises the following steps of: performing fine crushing on coarsely and intermediately crushed products with particle size not less than 70 mm through a closed loop to reach the particle size of 10-15 mm, performing dry weak magnetic rough sorting through a magnetic sorting machine with the magnetic field intensity of 1800-2000 Oe, and discarding a great amount of tailings with large particle size in advance; performing ultrafine crushing through a closed-loop high-pressure roller mill to reach the particle size of 3-5 mm, performing dry weak magnetic fine sorting through a magnetic sorting machine with the magnetic field intensity of 1600-1800 Oe, and discarding a great amount of tailings; and finally obtaining presorted concentrate. The discarding of a great amount of ultra-poor magnetite is realized, the grade of magnetite fed into a grinder is increased, the grinding cost is reduced, and the loss rate of magnetite is reduced. The process provided by the invention is easy to implement in the production in actual sorting plants and has high production efficiency, good product quality, energy saving, consumption reduction, low sorting cost and obvious economical benefit.

The invention discloses a pre-selecting and tailings discarding process of lean magnetite ores, comprising three stages: a coarse crushing stage, an intermediate crushing stage and an ultra-fine crushing stage, wherein fine crushing operation stage can be increased before the ultra-fine crushing stage and after the intermediate crushing stage. The staged magnetic pre-separation and tailings discarding work can be executed by different types of magnetic separators according to the difference of granularity of each crushing stage. Surrounding rocks and partial dissociatve gangue which drop in the tailings are removed in the first discarding work; waste stones which are not removed in the first tailings discarding work and the gangue which is further dissociated after the intermediate crushing stage are removed in the secondary tailings discarding work; and the third tailings discarding work is to discard the tailings after the tailings are ultra-finely crushed by a high-pressure roller mill. After the lean magnetite ores in which the fine particles are embedded are ultra-finely crushed by the high-pressure roller mill, the dissociation degree is further improved, and the magnetic separating and tailings discarding effects are good. The tailings discarding work is designed to reduce the loss of ferrous metal. The complete process can effectively improve the grade of grinding ferrous, can ensure the TFe recovery rate of the work, can improve the grinding characteristics of the material in the grinder, can reduce the quantity of the ore to be grinded, and can reduce the energy consumption of grinding the ores and the cost of separating the ores.

Doped silicon particles, including powder suitable for plasma spraying semiconductor devices, is formed by liquid doping applied to larger particles, which are then milled to a smaller size. Doped or undoped silicon may be milled by a roller mill including silicon rollers and advantageously having feed and collection systems formed of silicon and operated in a nitrogen ambient. A two-stage system includes sieving the rolled product for further size reduction in a jet mill.

To make peanut hull granules peanut shells are supplied to a flaker where the shells are flaked. The flaked shells are fed into a hydraulic pellet press where they are pressed into pellets using a horizontal die. The pellets are then cooled using cooler. The cooled pellets are processed by a roller mill that crumbles the pellets into granules.

The invention discloses an Anshan type lean magnetite underground ore dressing and filling method, comprising the following steps of: 1) sequentially crushing the raw ore from a stope by a jaw crusher in advance, wherein the ore discharge granularity is required to be not larger than 200mm, crushing the crushed products in a hydraulic cone crusher, screening the crushed products, returning the oversize products of which the product grain sizes are larger than 40mm back to the hydraulic cone crusher to be crushed again, screening the crushed products, and returning the oversize products of which the product grain size are larger than 40mm back to the hydraulic cone crusher to be crushed again; and 2) screening the valuable minerals which are separated in a scattering way, returning the oversize products back to a primary high-pressure roller mill to be crushed, crushing the undersize products of which the product grain size are less than 12mm in a secondary high pressure roller mill, and carrying out wet screening on the crushed products. According to the method, the ore dressing technological process of the mine are carried out underground and the filling station are built underground, and the method directly carries out the ore dressing on the exploited raw mine and fills a gob on the spot.

The invention discloses a high-efficiency and energy-saving new lean magnetite combined milling magnetic separation method. A high pressure roller mill is used as an ultrafine crushing device, and a vertical mill substitutes a ball mill. The method comprises the following steps: crushing, screening, carrying out dry pre-concentration, milling through the high pressure roller mill, carrying out medium field intensity wet magnetic separation, carrying out vertical coarse milling, carrying out weak magnetic roughing, carrying out vertical fine milling, and carrying out low intensity magnetic separation. The method allows a large number of coarse grain waste ores to be abandoned before milling, so the milling amount is reduced, the over milling problem during mineral liberation is effectively solved, and the consumption of steel balls and lining plates of the ball mill is significantly reduced, thereby the operation cost of the whole process is reduced. The method improves the grade of raw ores by above 2% after the weak magnetic dry separation, improves the relative grindability of roller mill products by above 30%, and reduces the energy consumption by 35-50% by adopting the vertical stirred mill to substitute the ball mill; and the power consumption of per unit of the raw ores and the consumption of the steel balls and the lining plates of the method in the invention are 65.37% and 59.26% lower than those of with routine three stage closed loop + two stage ball milling + two stage weak magnetic separation milling technologies in ore separation work respectively.

The invention discloses a method for preparing a high-nickel concentrate from a low-grade red soil nickel ore, which comprises the following steps of: drying the low-grade red soil nickel ore until water content is 13 to 16 percent, crushing to ensure that the size of all particles is less than 3mm, grinding by using a high-pressure roller mill to ensure that particles with the size of less than 0.074mm account for 80 percent and specific surface area is not less than 2,000cm<2>/g, adding 15 to 20 percent of composite binder and 1 to 5 percent of coal powder, and pelletizing by using a disc pelletizer to obtain green pellets with the size of 6 to 16mm; drying and preheating the green pellets on a chain grate for water removal and solidification to ensure that each piece of pellet entering a kiln has the compression strength of over 500N; directly adding the preheated and solidified pellets into a rotary kiln, and reducing at the temperature of between 1,100 and 1,250 DEG C for 60 to 120 minutes by using pea coal as a reducing agent in a mass ratio of the reducing coal to the pellets of 0.8-1.0; and cooling a reduction product, sieving, performing magnetic separation to obtain a magnetic product, crushing, grinding, and performing magnetic separation to obtain the high-nickel concentrate, wherein the composite additive comprises the following components: Na2CO3 and CaO, iron oxide powder, the coal powder and sodium humate in a ratio of (30-60):(20-30):(20-30):(5-10). The method is high in adaptability and nickel recovery rate and suitable for mass production.

Silicon particles, including powder suitable for plasma spraying semiconductor devices, is formed by milling by a roller mill including silicon rollers and/or plates and having feed and collection systems comprising silicon and operated in a controlled ambient.

A method for fractionating whole kernel corn into bran, germ and endosperm fractions. Corn (tempered or non-tempered) is processed through an impact mill and through a screener to divide the initial feed stream into two or more flows or substreams. The substreams or portions thereof may be further processed through a plurality of aspirators, roller mills and screeners to provide bran, germ and endosperm fractions of desired purity levels.

The invention provides an alloy Bainite ductile cast iron roller surface of a high-pressure roller mill and a preparation method of the alloy Bainite ductile cast iron roller surface. The cast iron roller surface comprises, by weight, 3.20-3.45% of C, 1.60-1.85% of Si, 0.40-0.60% of Mn, 0.50-1.00% of Mo, 1.50-4.00% of Ni, 0.30-1.00% of Cu, 0.30-1.00% of Cr, 0.10-0.60% of V, 0-0.02% of P, 0-0.01% of S and the balance being Fe and inevitable impurities. The preparation method comprises the four steps of smelting, centrifugal casting, aftertreatment and surface machining. The hardness of the cast iron roller surface is 54.8-63.0 HRC, and the compressive strength of the cast iron roller surface is 1990-3010 MPa. Compared with a cast iron roller surface, prepared by the prior art, of a high-pressure roller mill, the hardness is improved by 18%, and the compressive strength is improved by 70%.

The invention discloses a centrifugal casting coating for cylinder liners and a preparation method thereof. The centrifugal casting coating comprises the following components according to parts by weight: 100 parts of refractory aggregate, 12 to 20 parts of binder, 22 to 30 parts of heat-insulating agent, 0.7 to 1.15 parts of dispersant and 150 to 200 parts of water. The preparation method comprises the following steps: mixing and milling the refractory aggregate, the binder and the heat-insulating agent in a sand roller mill; feeding the mixed and milled components and the water into a stirring cask and stirring for 5 to 6 hours at the rotating speed of 120 to 180 rp/min; and adding sodium alkylbenzene sulfonate or sodium stearate and further stirring for 20 to 30 min to obtain the centrifugal casting coating for cylinder liners. The invention has the advantages that the selected materials are scientific and reasonable, the process is simple and advanced, and the coating has good sintering performance, high-temperature resistance and heat-insulation performance. Compared with the existing coatings, the coating layer, which is thinner and easily dried, has good heat-insulating effect, ensures that the castings can easily obtain good metallurgical structure, prolongs the service life of moulds and realizes the shape-following casting of the centrifugal casting cylinder liners.

The invention discloses a preparation method for a manually ground soap, which comprises the following steps: after a soap base is prepared, feeding the soap base into a three-roller mill to carry out primary grinding so as to obtain a flaky soap base; detecting the pH of the flaky soap base obtained after primary grinding and if the pH value is greater than 9, adding weak acid into the flaky soap base obtained after primary grinding to regulate the pH value; after the weak acid is added, carrying out grinding again, confirming that the pH value is reduced into the use range, and feeding the soap base subjected to pH value regulation into a soap plodder for extrusion molding; after extrusion molding, printing by a soap cold printing machine to obtain the manually ground soap and packaging to obtain the finished product. According to the invention, the pH value of the soap is regulated in the grinding process, thus, after the soap preparation process is finished, the obtained manually ground soap can be immediately used; in the grinding process, all or most of soap crystal phases are transformed into beta crystal phases by grinding and pressing through mechanical force, thus, compared with an unground soap, the prepared soap has high solubility, strong foaming capacity and fine washing feeling.

The invention relates to a high-pressure roll selective smashing and sorting method for middlings, and belongs to the technical field of mineral processing. The method comprises the following steps of: (1) smashing raw coal until the granularity is less than the upper limit of selected granularity suitable for a follow-up cleaning unit, desliming, and enabling the deslimed raw coal to enter resorting equipment to obtain clean coal I, middlings I and gangue I; (2) smashing the middlings I until the granularity is less than the upper limit of smashing granularity suitable for a high-pressure roller mill, carrying out high-pressure roller milling ultrafine smashing, desliming products subjected to ultrafine smashing, enabling the deslimed products to enter the resorting equipment to obtain clean coal II, middlings II and gangue II, wherein the middlings II return to the high pressure roller mill to be mixed with the middlings I so as to be smashed and sorted; (3) carrying out flotation on the coal slime after concentration and size mixing so as to obtain flotation clean coal and flotation tailing. Compared with conventional middlings smashing processes, the method disclosed by the invention is high in product dissociation degree and good in subsequent resorting effect, can be used for improving the clean coal yield, enabling coal resources to be sufficiently and reasonably recycled and utilized, and reducing resource waste.

The invention discloses a hot roller warm-rolling device and a hot roller warm-rolling method for metal plates and strips, and belongs to the technical field of steel rolling. A heating device is arranged near each roller of a double-roller mill, and consists of two symmetrically arranged metal pipe bundles and a connecting pipe; and each metal pipe bundle consists of an upper header pipe, a lower header pipe and a plurality of arc metal pipes, is provided with a water inlet and a water outlet and is connected with two electrodes of an alternating-current power supply. The method comprises the following steps of: applying alternating current to the metal pipe bundles through the alternating-current power supply, starting rollers, and heating the surfaces of the rollers to the temperature of between 200 and 900DEG C through magnetic field induction; introducing water into the arc metal pipes; and feeding the metal plates and strips into the rollers for rolling. The device and method are particular suitable for rolling difficultly processed metal materials; the difficultly processed metal plates and strips are plates and strips made of high silicon steel, magnesium, magnesium alloy,titanium, titanium alloy, molybdenum, molybdenum alloy or Martensitic stainless steel; and the device and the method have good effect of rolling the plates and strips made of the materials.

The invention relates to the technical field of magnetite mineral separation, in particular to a novel wet-type strong-magnetic pre-separation process of a weak-magnetic low-grade iron mineral roller mill, which is realized by the following steps of: subjecting mineral separation coarse breaking, medium breaking, fine breaking and sieving operations to ores produced from a stope through excavation; feeding products obtained through fine breaking operation into a high-pressure roller mill for ore breaking; feeding products of the high-pressure roller mill to a roller mill for sieving; returning oversize products to the high-pressure roller mill for re-breaking; feeding undersize products for weak magnetic separation so that concentrate obtained through the weak magnetic separation becomes pre-separated concentrate; feeding tailings from the weak magnetic separation for strong magnetic separation so that concentrate obtained through strong magnetic separation becomes pre-separated concentrate and tailings subjected to the strong magnetic separation are final tailings; and mixing the concentrate obtained through the weak magnetic separation with the concentrate obtained through the strong magnetic separation to obtain raw ores of a ball grinding mill so that the tailings obtained through the strong magnetic separation become the final coarse grain-size tailings. By adopting the novel wet-type strong-magnetic pre-separation process of the weak-magnetic low-grade iron mineral roller mill in a mineral separation plant, the energy consumption can be reduced by 20-30 percent and the processing capacity is improved by 30-40 percent.

The invention discloses a rolling mill bending roll and shift roll device, which has the advantage that a working roll bearing has no offset load moment when the roll is shifting. The rolling mill bending roll and shift roll device comprises upper bending roll hydraulic cylinders, lower bending roll hydraulic cylinders and bearing bases respectively arranged on the fore side and the backside, a shift roll hydraulic cylinder, a shift roll cylinder of the fore side, a frame work and a working roll arranged up and down; the working roll arranged up and down is installed on the bearing base of the fore side and the backside, the bearing base on the fore side and the backside is axially and movably arranged opposite to the frame work, the upper bending roll hydraulic cylinder and the lower bending roll hydraulic cylinder on the fore side is radially acted on the bearing base of the fore side, and the upper bending roll hydraulic cylinder and the lower bending roll hydraulic cylinder of the backside is radially acted on the bearing base of the backside, the shift roll hydraulic cylinder is distributed along the axes of the working roll and acted on he bearing base of the fore side, the upper bending roll hydraulic cylinders and the lower bending roll hydraulic cylinders of the fore side and the backside are fixedly arranged opposite to the frame work, and at least two of the upper bending roll hydraulic cylinders and the lower bending roll hydraulic cylinders are respectively arranged. The device can effectively avoid the offset load of the working roll bearing base, thus prolonging the service life.

The invention discloses a vibrating belt type magnetic separator, which belongs to the field of dry magnetic separation equipment. The vibrating belt magnetic separator of the present invention includes a conveyor belt (6) and a feeding pipe (2), a vibrating platform is arranged under the conveyor belt (6), and the feeding pipe (2) is located on the side of the vibrating platform Above one end, a magnetic system (3) is arranged on the inner side of the conveyor belt (6). The vibrating belt magnetic separator of the present invention has simple structure, high efficiency and energy saving, low manufacturing cost, low use cost, high equipment operation reliability, and low maintenance cost; it can conveniently control the grade of concentrate, and is not only suitable for the selection of rich ore, but also It is suitable for the selection of lean ore and extremely lean ore, and can maximize the use of mineral resources; it can continuously process a large amount of magnetic materials after being rolled by a high-pressure roller mill, reduce the number of subsequent process equipment, and reduce the energy consumption of the process system. Improve the recovery rate and grade of minerals, which is conducive to popularization and application.