126results about How to "Avoid overgrinding" patented technology

The invention discloses a silicate cement grinding aid and a preparation method thereof. The silicate cement grinding aid is prepared from the following main raw materials by weight: 3-6 parts of sodium hexametaphosphate, 2-5 parts of aluminum sulfate, 5-8 parts of tetra sodium salt of amino trimethylene phosphonic acid (ATMP.Na4), 4-6 parts of ethylene diamine tetra (methylene phosphonic acid) sodium, 38-45 parts of polymeric alkylol amine, 34-42 parts of triisopropanolamine, 8-12 parts of waste engine oil, 2-5 parts of sodium alpha-olefin sulfonate, 10-16 parts of sorbitol, 15-20 parts of diethylene glycol, 8-13 parts of polypropylene wax, 6-10 parts of oxidized polyethlene wax, 4-8 parts of lignite wax, 20-30 parts of odium thiosulfate, 12-18 parts of sodium thiosulfate and 15-20 parts of quicklime powder. The prepared silicate cement grinding aid has the advantages that the quality is stable, the effect is remarkable, the adding amount is small, the use is simple, and the adding is more convenient and reliable to control.

The invention discloses a weathering type ilmenite beneficiation treatment method. The beneficiation treatment method comprises the following steps that A prescreening is carried out; B, low intensitymagnetic separation is carried out; C, high intensity magnetic separation is carried out; D, preliminary classification is carried out; and E, flotation is carried out. According to the weathering type ilmenite beneficiation treatment method, the titanium recovery rate is effectively improved, titanium concentrate and iron ore concentrate are obtained at the same time, the technology is simple, the technological process is easily operated, and popularization is facilitated. Beneficiation according to the technical scheme is adopted, the particle size of monomer separation fine-fraction ilmenite in raw ore is protected, and excessive abrasion is avoided; the high intensity magnetic separation technology is used for discarding tailings, the follow-up handling quantity is greatly reduced, and the ore grinding cost and the beneficiation cost are reduced; and an environment-friendly collecting agent KM221 which is good in selectivity, low in cost, non-poisonous and harmless is adopted forflotation recovering of ilmenite ore, fine fraction titanium resources which are difficult to recover through the traditional technological process are effectively recovered, and the weathering type ilmenite resource using rate is improved.

The invention designs the center low-grade bauxite dressing method, takes the center low-grade one water duralumin stone bauxite as the raw material, the main point is uses the 'selective rubbing, the graduation, escapes the putty, the concentration, the narrow rank flotation process' technical process, the selective rubbing uses the ball mill or the vibration rub; The graduation is separates the qualified large grain ore concentrate, chooses water used grain-by-grain selection flowing; escapes the putty, the concentration is carries on the escapes the putty to the ore slime which is smaller than 10mu m and to cause the pulp concentration, satisfies the pulp density request of the following flotation process, uses the water power cyclone; The narrow rank flotation process uses the flotation process craft, the flotation reagent is the ore-dressing;the catche receive medicinal preparation is the fatty acid, the dispersing agent is the sodium carbonate,merges the graduation work obtained large grain ore concentrate with the flotation concentrate and final obtain the ore concentrate,the aluminum silicon ratio in the large grain ore concentrate is bigger than 9, the production rate 30~50%, the Al2O3returns-ratio 40~50%, the mix ore concentrate aluminum silicon ratio is 9~10, the Al2O3returns-ratio is bigger than 88%.The technical process structure is simple,the production cost is low, the movement is steady, the target is stable, has a stronger adaptiveness to the center low-grade one water duralumin stone bauxite.

The invention belongs to the technical field of intelligent processing and manufacturing, and particularly discloses an integrated active-passive compliant one-dimensional variable force grinding andpolishing device and a control method. The integrated active-passive compliant one-dimensional variable force grinding and polishing device comprises a linear module servo motion platform, a mountingflange, a limiting plate, a position and orientation sensor, a speed-adjustable compliant grinding and polishing mechanism and a controller, and the linear module servo motion platform is used for driving the grinding and polishing mechanism to perform linear motion; the mounting flange and the limiting plate are mounted on a base of the linear module servo motion platform, and the position and orientation sensor and the speed-adjustable compliant grinding and polishing mechanism are installed on the limiting plate; and the position and orientation sensor is used for measuring position and orientation of the one-dimensional variable force grinding and polishing device and sending the position and orientation to the controller, a force sensor is arranged between the compliant grinding and polishing mechanism and sliding blocks, the force sensor is used for collecting a contact force signal and send to the controller which can calculate speed control quantity, and the speed-adjustable compliant grinding and polishing mechanism is driven to move by rotation of a servo motor according to the speed control quantity. According to the integrated active-passive compliant one-dimensional variable force grinding and polishing device and the control method, the contact status of a abrasive belt and a workpiece can be adjusted in real time, and a stable and compliant grinding and polishingprocess is realized.

The invention discloses a preparation technology of super pure coal, and is applicable to the technical field of mineral separation. The preparation technology comprises the steps that after minus 50 mm low-ash anthracite is crushed through a high-efficiency fine crusher, the crushed low-ash anthracite is introduced into a three-product interference bed for separation, and coarse clean coal, medium coal and recrement are obtained; coarse clean coal is classified through a three-product vortex sieve, and coarse clean coal remaining on the sieve is dehydrated through a coal slime centrifuge to obtain a coarse-particle super pure coal product; and after primary coarse grinding, medium coal is introduced into a sieve bend for classification, oversize material on the sieve bend is introduced into a spiral separator for tailing discharging, and after secondary fine grinding, a light product is introduced into a flotation device for flotation together with screen underflows of the three-product vortex sieve, overflows, the centrifugate of the coal slime centrifuge, and screen underflows of the sieve bend, and a fine-particle super pure coal product is obtained. According to the preparation technology, a two-stage ore grinding technology is adopted, so that an overgrinding phenomenon which often occurs during open-circuit grinding is avoided; tailings are discharged during primary ore grinding, so that efficiency and energy consumption are achieved; the two-stage floatation is adopted, so that low-ash clean coal can be obtained; and compared with a traditional separation technology, the preparation technology has the advantages that the principle of more crushing and less grinding is better met, efficiency and energy consumption are achieved, and the economic benefits are remarkable.

The invention provides a method for recycling iron and titanium in vanadium titano-magnetite. The method comprises the following steps: performing primary ore grinding and primary magnetic separation on vanadium titano-magnetite ore to obtain crude iron ore and primary magnetic separation tailing ore; performing secondary ore grinding and secondary magnetic separation on the crude iron ore to obtain concentrate iron ore and secondary magnetic separation tailing ore; performing third magnetic separation or reselection on the primary magnetic separation tailing ore with a particle size being 0.1mm-0.4mm to obtain crude titanium ore; performing electric separation on the crude titanium ore to obtain concentrate crude titanium ore; mixing the secondary magnetic separation tailing ore with the primary magnetic separation tailing ore with a particle size being less than 0.1mm, then performing crude and fine separation, and performing fourth magnetic separation on a mixture with a particle size being greater than 0.038mm to obtain concentrate fine titanium ore; and performing fifth magnetic separation on a mixture with a particle size being less than or equal to 0.038mm to obtain concentrate superfine titanium ore. By adopting order grinding, order separation and separation of crude and fine particles, the recycling method is capable of efficiently recycling the concentrate iron ore and the concentrate titanium ore in the vanadium titano-magnetite.

The invention relates to a vertical roller mill, which comprises a vertical main rotating shaft arranged on a machine body, wherein a speed reducer and a motor are connected to the lower end of the main rotating shaft sequentially; a grinding bowl is arranged at the upper end of the main rotating shaft; the upper part of the inner side of the grinding bowl contacts a plurality of grinding rollers; the grinding rollers arranged on the grinding roller shaft by a bearing; the grinding roller shaft is connected to one end of a rocker arm; the middle part of the rocker arm is hinged to the machinebody; the other end of the rocker arm is hinged with the upper end of a hydraulic cylinder; the lower end of the hydraulic cylinder is arranged on the machine body; a central feed pipe which aligns with the grinding bowl downwards is arranged on the top of the machine body; and a discharge hole is formed below the grinding bowl on the machine body. The vertical roller mill has the advantages of convenience for oil injection, high yield, low energy consumption, large processing capacity, high efficiency and sealing performance, adjustable grinding force and the like, is easy to maintain and overhaul, and the technical problems of enrichment of steel slag and iron granules, high abrasion of the mill, difficulty of overhauling of equipment and the like are solved radically.

The invention relates to a flotation method, in particular to a flotation method for improving the flotation recovery rate of a target mineral in a complex ore. The method comprises the following steps: grinding a target mineral in a raw ore until the target mineral is basically dissociated; producing a concentrate 1 and a tailing 1 through roughing one or twice, cleaning twice or three times, as well as scavenging three to ten times; combining a bottom product of the concentrate 1 and all scavenged foam products to form a middling; concentrating and grinding; returning the grinded ore pulp to a flotation process through an independent sequence to obtain a concentrate 2 and a tailing 2; and combining the concentrate 1 and the concentrate 2 to obtain a final concentrate. According to the flotation method in the invention, the grinding energy consumption can be effectively reduced, partial target mineral with low floating speed is recovered, and the flotation recovery rate of the target mineral is improved by 5 to 20 percent.

The invention relates to a separation process for magnetic red mixed ore based on iron material disseminated particle size treatment. The process comprises the operation of feeding the mixed ore withthe grade of 27%-29% and with magnetite as a main raw material into first-section closed circuit ore grinding operation to obtain a primary grading overflow product, and is characterized by further comprising first-section weak magnetic and strong magnetic operation, fine screening operation, first-section magnetic separation and first-section washing magnetic separation operation, second-sectionclosed circuits ore grinding operation, second-section weak magnetic strong magnetic operation, second-section magnetic separation and washing magnetic separation operation, third-section closed circuit ore grinding, third-section weak magnetic strong magnetic operation and reverse flotation operation. The final concentrate with the grade of 66%-66.5% is obtained through the operation. Compared with the prior art, the separation process has the advantages that 1) an efficient separation process which is characterized in that the concentrate can be obtained once dissociation is achieved and segmented ore grinding, segmented concentrate taking and segmented tailings discharging are achieved is provided for the magnetic red mixed ore with the non-uniform iron material disseminated particle sizes, so that overgrinding is reduced, and energy conservation and consumption reduction are achieved; 2) magnetic separation equipment is adopted for upgrading, and three sections of ore grinding is carried out by adopting vertical mills; and 3) the process is simple in structure, free of middling circulation, easy to implement on site and easy to produce and manage.

The invention discloses a copper gold silver ore flotation collecting agent and a flotation method, belongs to the technical field of ore flotation, and solves the prominent problems of low copper gold silver ore beneficiation efficiency, high cost and the like. The copper gold silver ore flotation collecting agent ester-205 is prepared from the following raw materials: 30 to 40 parts of N,N-diethyl dithiocarbamate, 20 to 25 parts of diisopropyl dithiophosphate, 10 to 15 parts of black powder acid, 20 to 30 parts of terpenic oil and 2 to 5 parts of ethyl alcohol. The flotation method comprises the following steps: preparation of flotation pulp, flotation preparation and copper gold silver ore flotation. According to the copper gold silver ore flotation collecting agent and the flotation method, multiple circulation times and metal loss of target metal ores in a flotation process are effectively avoided, so that the trunk flotation process is shortened, and the investment and operation cost is reduced; the collecting agent ester-205 is high in collecting capacity; the flotation speed is increased; the copper gold silver recycling rate is increased; the number of the scavenging times is reduced; and the types and the use amounts of flotation agents are reduced.

The invention relates to a mill run separation method for the aluminium silicon mineral, in particular to a diasporite type alumyte floatation desiliconizing method. The invention is characterized in that: after grinding the original aluminium silicon mineral, directly carrying through a rougher flotation, the surfaced foam is looked upon as the ore concentrate product or enters the chosen; grading the rougher flotation underset, the coarse fraction enters the second stage milling grinding, the milling grinding products returns to the rougher flotation; the fine fraction enters the scavenging operation; the sequence of choosing underset, scavenging foam returns to the operation before. The invention has the advantages of solving the problem of the reasonable grade distribution of the milling grinding and the mill run slurry, greatly reducing the ore concentrate minuteness grade, increasing the coarse fraction, and solving the problem of high moisture level in the filter products.

The invention relates to a cement outer-circulating semi-finish grinding system of a vertical mill. The cement outer-circulating semi-finish grinding system comprises a belt conveyor, a magnetic separator, a metal detector, a three-way valve, the vertical mill, a bucket elevator, a powder concentrator, a dust collector, an air blower, a tube grinder and a chute, wherein the vertical mill is an outer-circulating vertical mill, and no powder concentrator is arranged in the outer-circulating vertical mill; the powder concentrator is formed by connecting a coarse powder V-shaped powder concentrator and a fine powder concentrator in series, and fine powder obtained from the coarse powder V-shaped powder concentrator enters the fine powder concentrator for concentration again; the fine powder obtained from the fine powder concentrator is served as a cement product A and collected through the dust collector and the air blower, and separated coarse powder is divided into two ways, wherein one way enters the tube grinder, and one way returns to the vertical mill for circulating grinding; and the powder which enters the tube grinder is ground into a cement product B by the tube grinder. The cement outer-circulating semi-finish grinding system disclosed by the invention achieves relatively high grinding efficiency by sufficiently exerting the high-efficiency crushing and grinding functions of the vertical mill and the high-efficiency grinding function of the tube grinder on the fine powder, thereby reducing the grinding energy consumption.

The invention discloses a method for preparing synthesized KMg3(AlSi3O10)F2 crystal powder through a wet process. The method comprises the following steps: (1) crushing synthesized fluorophlogopite with the particle diameter of more than 0.85 millimeters, and using an ore washer for scrubbing and sieving so as to remove impurities, wherein the scrubbing hydraulic pressure is between 0.15 and 0.2 MPa; (2) making the scrubbed materials enter a pulper for pulping, wherein the pulping hydraulic pressure is between 5 and 7 MPa; (3) performing sieve classification on the obtained materials by pulping into three materials with three kinds of particle diameter, namely the materials with the particle diameter of more than 0.25 millimeter, the materials with the particle diameter of between 0.25 and 0.125 millimeter and the materials with the particle diameter of less than 0.125 millimeter, and performing pressure filtration on the three materials respectively, wherein the water content of the materials after pressure filtration is between 31 and 40 weight percent; (4) using a wheel mill to perform fine grinding and sizing on the three materials respectively, wherein the rolling gap is between 10 and 40 millimeters, the sizing is performed in a group of sizing pools, the materials with the particle diameter of more than 0.25 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 100 mu m, the materials with the particle diameter of between 0.25 and 0.125 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 250 mu m, and the materials with the particle diameter of less than 0.125 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 160 mu m; and (5) using a plate-and-frame filter press to perform pressure filtration on the products after sizing, making the water content of the products be less.

The invention relates to an ore dressing method for metal containing secondary copper sulfide ores. The method is characterized in half preferential copper floatation, branched Cu-S collective-selective floatation roughing, branch Cu-S separation roughing and differential reagent adding. Crude ores (a) are conventionally ground. Copper concentrate products 1 (KCu1) are obtained through half preferential copper floatation. Cu-S collective-selective floatation roughing is carried out in two paths: Cu-S collective-selective floatation scavenging and re-grinding Cu-S separation roughing. On one path, ore re-grinding and Cu-S separation roughing are carried out; and Cu-S separation roughing is carried out in two branches: on one branch, copper concentrate products 2 (KCu2) are obtained by carrying out secondary copper concentrating on copper crude ores and concentrates; and on the other branch, tailing third Cu-S separation scavenging, sulfur roughing and the sub-branches of carrying out secondary sulfur concentrating to obtain sulfur concentrate products (Ks) and carrying out sulfur scavenging to obtain tailings 2(X2) are carried out. On the other path, Cu-S collective-selective floatation scavenging is carried out, and tailings 1 (X1) are obtained through third collective-selective floatation scavenging. The method not only can realize Cu-S separation and ensure the grades and recycling rates of the copper concentrates and the sulfur concentrates, but also can reduce energy consumption, increase separation indexes and realize the early recycling of recyclable usable minerals in the ores. The method has the advantages of low ore grinding cost, simple reagent principles, stable and reliable technical process, great target mineral recycling effect, remarkable energy saving and consumption reduction and the like.

The invention discloses a process of ore dressing and grinding. The process is realized by combining a wet-process rolling-type mill 1, screening equipment 2, a wet-process ball mill 3, a swirler 4, an intermediate box 5 and a mortar pump 6. Ore is conveyed from the direction A to enter the wet-process rolling-type mill 1; water is conveyed from the direction A to enter the wet-process rolling-type mill 1; ore pulp levigated by rolling in the wet-process rolling-type mill 1 enters the screening equipment 2; oversize coarse ore grains of the screening equipment 2 enter the wet-process ball mill 3; the ore pulp further levigated in the wet-process ball mill 3 enters the intermediate box 5; undersize ore pulp of the screening equipment 2 enters the intermediate box 5; the ore pulp in the intermediate box 5 is delivered into the swirler 4 through the mortar pump 6; the underflow of the swirler 4 returns back to the wet-process ball mill 3; and the overflow of the swirler 4 is discharged along the direction B and is the qualified ore pulp. The wet-process rolling-type mill 1 is a mortar rotary mill. The screening equipment 2 is a wet-process vibrating screen. The process disclosed by the invention has the positive effects that ore grain argillization is overcome; the dissociation is complete; and the investment, the power consumption and the ball consumption are saved.

The invention provides a production process of multifunctional calcium carbonate. The method comprises the steps of: grinding a calcium carbonate raw material, and then conducting classification on the ground calcium carbonate; conducting at least one classification on the calcium carbonate less than a first grain size to obtain calcium carbonate in different particle size ranges; and subjecting the calcium carbonate larger than the first particle size to a wet grinding In the invention, the production process is optimized; and ground calcium carbonate is subjected to multiple classification treatments to avoid the over-grinding phenomenon in calcium carbonate production, and realize large-scale production of multifunctional calcium carbonate, thereby reducing energy consumption, saving resources and lowering production costs.

The invention discloses a separation flotation technology with copper and molybdenum bulk concentrate regrinding omitted. The technology includes that copper and molybdenum bulk concentrate produced through grinding and floatation of crude ore is subjected to thickening dehydration of two thickeners, underflow is delivered to a surge tank after being subjected to filtration and size mixing of a ceramic filter, and ore pulp in the surge tank no longer enters a regrinding classification system, but is fed into an agitation tank via a pump, and thus is fed into a copper and molybdenum separation flotation process. After the regrinding technology separation process of the copper and molybdenum bulk concentrate is omitted, over-grinding of molybdenum minerals is avoided, operation recovery rate of molybdenum is increased greatly and is increased from 60% when the regrinding technology is used to about 82% after the regrinding is omitted, copper content in the molybdenum concentrate is lowered from original 4-5% to below 1%, molybdenum grade in the molybdenum concentrate is increased from original 45% to 48%, and consumption of copper mineral inhibitors is also reduced.

The invention discloses a separation method for cupric oxide and copper sulfide mixed ore. The separation method comprises the following steps: S1, grinding the cupric oxide and copper sulfide mixed ore to below the grade of 0.074mm accounting for 60 to 70 percent of fineness; S2, adding a regulator, a collector and a foaming agent for floating copper sulfide ore into ore pulp obtained from S1; S3, grinding copper sulfide rough concentrate obtained from S2, and carrying out aeration floatation to obtain copper sulfide concentrate; S4, adding a vulcanizing agent, the regulator, the collector and the foaming agent into copper sulfide rougher tailings obtain from S2 and carrying out floatation to obtain cupric oxide rough concentrate; and S5, adding the vulcanizing agent, the regulator, the collector and the foaming agent into the cupric oxide rough concentrate obtained from S4, carrying out floatation to obtain cupric oxide concentrate and cleaner tailings, scavenging the cleaner tailings and outputting the cleaner tailings. By use of the separation method disclosed by the invention, the copper sulfide concentrate and the cupric oxide concentrate with higher grade and higher recoveryrate can be obtained, so that the investment is saved; and the separation method can be applied to industrial production.

The invention discloses a cement clinker grinding implementation device capable of continuously producing, and relates to the technical field of grinding devices. The cement clinker grinding implementation device capable of continuously producing comprises a shell, a stirring device, a screening device for separating a stirring chamber and a shell discharge hole, and a conveying airflow fed into the stirring chamber, wherein the conveying airflow is constructed to be capable of enabling a ground material to penetrate through the screening device so as to convey to the direction of the discharge hole. According to the cement clinker grinding implementation device capable of continuously producing provided by the invention, wind power of the conveying airflow is utilized for realizing grinding and screening at the same time, and the ground material can be timely carried over from the stirring chamber so as to be prevented from being excessively ground.

The invention provides a chemical mechanical polishing method; the chemical mechanical polishing method comprises the step of respectively executing polishing in different stages on two polishing pads, wherein through using surface structures of the two polishing pads or changing polishing paths in the different stages, a first polishing effect of the polishing in the first stage on wafer surface is complementary to a second polishing effect of the polishing in the second stage on the wafer surface; therefore, a polishing weakening area is formed in the second polishing stage if a polishing reinforcing area is formed in the first polishing stage, and a polishing reinforcing area is formed in the second stage if a polishing weakening area is formed in the first stage. Therefore, polishing amounts are uniformly distributed and excessive polishing or insufficient polishing phenomenon is avoided.

This invention belongs to the power engineering, referring to cement and mineral sophistication production equipment. It includes revolving canister(8),front axletree seat(7),back axletree seat(10).The front of (8) is connected to (7) by axletree, the back to (10).There are feed-in meatus (1) and feed-out meatus (6) in (8).The character is that in (8) there are 1-3 picking power equipments. This invention integrates levigation and picking to increase output, reduce energy sourse, decrease expenditure. Comparing with the same scale equipment, its output increases by more than 20% and the consumption of electricity decreases by more than 30%.