42results about How to "Reduce cycle load" patented technology

The invention discloses a beneficiation method for silicate and carbonate type fluorite ores, and belongs to the technical field of non-metal ore beneficiation. The problems of low recovery rate and high impurity content of concentrate products in the conventional beneficiation method are solved. The method comprises the following steps of ore grinding; roughing, that is, a gangue inhibitor is a combination of T20 and acidic soluble glass, the collecting agent is Y-8, the gangue inhibitor T20 comprises polyaspartic acid, aluminum sulfate and hydroxyethylidene-1,1-diphosphonic acid in a mass ratio of 3-6: 4: 0.5-1, and the collecting agent Y-8 comprises sodium oleate, 4-epoxytetradecanoic acid and octylphenylpolyethylene glycol in the mass ratio is 6-7: 2-3: 1; scavenging operation, that is, a collecting agent Y-8 is added; regrinding rough concentrate; concentration, that is, an inhibitor T20 and acidic soluble glass are adopted, and Y-8 is adopted as the collecting agent. Under the condition of low temperature, the impurity content in the concentrate product can be effectively reduced, and the fluorite concentrate grade is improved.

The invention relates to concrete containing CTL coarse slag and a preparation method of the concrete. The concrete is prepared from the following raw materials in parts by weight: 15 to 20 parts of cementing material, 30 to 40 parts of fine aggregate, 40 to 50 parts of coarse aggregate, 3.75 to 9 parts of water and 0.015 to 0.4 part of water reducing agent, wherein the cementing material is prepared from the following components in parts by weight: 3 to 30 parts of CTL coarse slag, 20 to 60 parts of mineral slag, 10 to 40 parts of steel slag particles, 5 to 20 parts of gypsum and 2 to 15 parts of cement. The concrete provided by the invention is reasonable in raw material grading and has excellent mechanical properties; industrial solid wastes, such as CTL coarse slag, mineral slag, steelslag and gypsum, are effectively utilized, so that the method is low in cost, economical and environmentally friendly. The invention also provides a corresponding preparation method. The preparationmethod realizes no waste, no pollution and high efficiency in the whole process.

The invention relates to a smashing, screening and circulating coal feeding system which comprises a mixed coal bunker, a coal feeding material nozzle, an iron separator, a smasher and a number one coal feeding belt conveyor. The lower portion of the number one coal feeding belt conveyor is connected with the mixed coal bunker, the coal feeding material nozzle is positioned at the bottom of the mixed coal bunker, the lower portion of the coal feeding material nozzle is connected with the smasher, and materials after being processed are conveyed to a boiler by the belt conveyor. The smashing, screening and circulating coal feeding system is characterized in that a vibratory screening machine is additionally arranged at an outlet of the smasher, a material separating nozzle is arranged on the lower portion of the vibratory screening machine and connected with a number two below-screen belt conveyor, coal briquette with qualified granularity is conveyed to the boiler by the number two below-screen belt conveyor, materials on a screen of the vibratory screening machine are conveyed to a number three above-screen belt conveyor, and a hanging rack is arranged on the end portion of the number three above-screen belt conveyor. By the smashing, screening and circulating coal feeding system, resource waste caused by incomplete burning of large-sized coal is effectively reduced, burning efficiency of the coal briquette is improved, production cost of the boiler is reduced, and the problems of difficulty in raw coal separating and high load of the coal smasher are solved. The smashing, screening and circulating coal feeding system is suitable for closed cycle processes like smashing, screening, separating and the like of bulky materials.

The invention discloses a vertical roll mill air-distribution process for adjusting cement particle gradation. According to the air-distribution process, the air amount needed by a vertical roll mill is distributed into a large part and a small part; the large part is guided in a milling area from the lower part of the vertical roll mill and used for lifting and drying materials in the milling area; the small part is guided in the lower part of a powder selection machine from the upper part of a middle shell of the vertical roll mill, and used for conveying milled materials into the powder selection machine in an air-swept manner with gas guided from the lower part of the vertical roll mill so as to supplement air for powder selection. The invention further discloses a device for achieving the process. According to the air-distribution process and device for achieving the process, disclosed by the invention, the air passing amount at a milling disc is reduced in a manner of distributing the air amount needed by the vertical roll mill into a part below the milling disc and a part above the middle shell, and the air is supplemented for the powder selection machine on the upper part of the middle shell; through reasonable matching, on one hand, the circulating load and the resistance of the vertical roll mill can be reduced, the power consumption of the mill can be decreased, and the efficiency of the vertical roll mill can be increased, on the other hand, the finished cement particle gradation can be adjusted, and the cement performance can be improved.

The invention discloses a full-automatic crop straw powder preparation system. The full-automatic crop straw powder preparation system consists of a cutting dust remover, a cutting machine, a storage silo, a cutting mill, a powder concentrator, a cyclone collector with an unloader, a circulating fan with a recirculating air valve, a dust remover with a dust remover fan valve and a dust removal fan which are connected in sequence. Full-automatic operation of cutting straws, crushing, grading, collecting, dedusting and the like are realized, plant straws are placed in an inlet of the cutting machine, straw powder which meets the requirement can be obtained at an outlet of cyclone collecting equipment, the dedusting function is realized by system dedusting equipment, and the thermal pollution problem caused to an environment in the powder preparation process is solved.

The invention discloses an efficient and energy-saving vertical mill grading system. The system is achieved by additionally setting a recirculation air device on the basis of the existing vertical mill grader, wherein the inlet of the recirculation fan is connected with a harvester fan and the outlet is connected with a valve at the air inlet of the mill through a recirculation air valve, and the air volume of the vertical mill grading system can be changed by adjusting the frequency of the recirculation fan. In comparison with the existing technical scheme, the invention solves the problems of improving yield and precision, saving energy and lowering consumption by fully utilizing the existing process system.

The invention discloses a heavy-media dry-method separator with a vibration discharge function, and belongs to the field of separating equipment. In the structure of the separator: the front end of a box frame is equipped with a raw material entrance, and the rear end of the box frame is equipped with a light product discharge port and a heavy product discharge port; the box frame is internally equipped with a gas distributor, the front end of the gas distributor is correspondingly arranged below the raw material entrance on the box frame, and the rear end of the gas distributor is connected with the heavy product discharge port; the bottom of the box frame, from top to bottom, is sequentially equipped with a separating air chamber and discharging air chambers which are connected with the bottom of the gas distributor; a layer of medium draining screen plate is arranged above the gas distributor, the medium draining screen plate is shorter than the gas distributor, the front end of the medium draining screen plate is equipped with a kick-off wheel, the kick-off wheel and the front end of the medium draining screen plate are positioned in the back of the raw material entrance on the box frame, and the rear end of the medium draining screen plate is connected with the light product discharge port of the box frame; and the box frame is further equipped with a vibrator which can drive the gas distributor and the medium draining screen plate in the box frame to vibrate. The heavy-media dry separator has the advantages of simple structure, high separating efficiency, small heavy medium circulation quantity and good running stability.

The invention discloses an ore grinding grading system and method capable of controlling derichment of iron minerals. The ore grinding grading system comprises a feeding pulp tank, a feeding pump, a double-overflow-pipe swirler, a sand setting pulp tank, a mill, first separation equipment and an open-circuit grinding machine. The double-overflow-pipe swirler is provided with a swirler inlet, a setting sand outlet, an outer overflow outlet and an inner overflow outlet. An outlet of the feeding pulp tank is connected with an inlet of the feeding pump. An outlet of the feeding pump is connected with the swirler inlet. The setting sand outlet is connected with an inlet of the mill. An outlet of the mill is connected with the feeding pulp tank. The outer overflow outlet is connected with the first separation equipment. The inner overflow outlet is connected with an inlet of the open-circuit grinding machine. An outlet of the open-circuit grinding machine is connected with the first separation equipment. The ore grinding grading method includes the steps that ore pulp is fed into the double-overflow-pipe swirler to be graded, and the graded setting sand products, outer overflow products and inner overflow products are processed separately. By means of the ore grinding grading system and method capable of controlling derichment of the iron minerals, derichment of the iron minerals in setting sand can be reduced, the handling capacity of the mill is improved, the energy consumption for ore grinding is reduced, and the quality of ore concentrate products is improved.

A method for treating vascular degeneration and stimulating glucose uptake in diabetics including the administration to a patient of a combination of a dilator of striated muscle microvasculature and chemical entity that stimulates the uptake of glucose in striated muscle in a pharmaceutically acceptable carrier.

The invention belongs to the technical field of steel slag micro-powder preparation, and particularly relates to a high-activity steel slag micro-powder preparation system which comprises a raw material bin, an advancing type biomass combustion furnace, a screening device, a crushing device, a vertical mill grinding device, a dust collecting device, an excitant preparation device and a finished product bin. Materials in the raw material bin are conveyed to the screening device through a conveying device A, unqualified materials of the screening device are conveyed to the crushing device through a conveying device B, a discharging port of the crushing device is connected with the conveying device A, and qualified materials of the screening device are conveyed into the vertical mill grinding device through a mill feeding conveying reamer. The high-activity steel slag micro-powder preparation system solves the problems that existing steel slag micro-powder is poor in grindability, low in activity and limited in drying heat source, and is used for reducing steel slag grinding energy consumption, improving the activity of the steel slag micro-powder, ensuring the drying effect of the system and promoting steel slag solid waste recycling.

The invention discloses a floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore. According to the method, backwashing secondary concentrate which is subjected to table cleaning with the reselection tin recycling metal rate content being 50-60% is gathered, a phi 250 hydrocyclone is adopted for concentrating and dewatering, and settling is conducted for floatation, desulfurization and impurity removal, and large-proportion iron sulfide concentrate with coarse particles is removed; and floatation and impurity removal comprise primary roughing and primary scavenging operations, and tinstone derichment tailings subjected to floatation and impurity removal are subjected to backwashing table reselection.

The invention discloses a flotation-free dressing recovery process for mixed iron ore, and relates to the technical field of ore dressing. Mixed iron ore high-pressure roller milling-wet pre-selected concentrate enters a follow-up grinding and selecting first-section hydrocyclone to be classified, sand settled by the hydrocyclone enters a first-section ball mill to be ground, and ball-milling discharged ore returns to the first-section hydrocyclone to be classified; overflow of the first-section hydrocyclone enters a spiral chute for grading to obtain iron ore concentrate; tailings in the spiral chute are subjected to weak magnetic separation and strong magnetic separation tailings discarding, strong magnetic concentrate passes through the spiral chute to obtain iron ore concentrate, the tailings in the spiral chute and the weak magnetic concentrate are combined and enter a second-stage hydrocyclone to be classified, classified settled sand enters a second-stage ball mill to be ground, second-stage ball mill discharged ore passes through the spiral chute to obtain an iron ore concentrate product III, and second-stage ground ore overflow is subjected to weak magnetic separation and strong magnetic separation tailings discarding; and the weak magnetic concentrate and the strong magnetic concentrate are combined and classified through screening, the undersize product is an iron ore concentrate product IV, and the screened product returns to the second-stage cyclone to be classified, so that a closed cycle is formed. The method has the advantages of low production cost, high recovery rate, high concentrate dewatering and filtering performance, economical, environmental protection and the like.

The invention relates to a raw material outer circulation final grinding system using a self-screening function vertical mill and an application, and belongs to the technical field of building material machinery. The raw material outer circulation final grinding system comprises the vertical mill, a vibrating screen, a lifting machine, a powder selecting machine, a cyclone cylinder, a dust collector and a fan; the vertical mill and the vibrating screen are connected to form a circulation system; the vertical mill, the vibrating screen, the lifting machine and the powder selecting machine are sequentially connected to form a circulation system; the vertical mill, the vibrating screen, an elevator, a powder concentrator and the cyclone cylinder are sequentially connected to form a raw material final grinding system; and the powder concentrator, the cyclone cylinder, the dust collector and the fan are sequentially connected to form a circulation system. The vertical mill has a self-screening function and comprises a screening device, the screening device is used for returning raw materials or large materials which are not ground to a grinding disc for further grinding; and the screening device is fixed on a material blocking ring and / or an air ring. According to the raw material outer circulation final grinding system, unpolished materials are reduced to enter the elevator, the system cycle load is reduced, the system energy consumption is reduced, the height of a workshop is reduced, and the investment cost is reduced.

The invention relates to a beneficiation method of fine flake graphite ore. The beneficiation method is characterized by comprising the following steps: (1) fine flake graphite raw ore is crushed to -1 mm, through pre-screening and check screening, a mill and screening equipment form closed-circuit ore grinding, -0.5 mm undersize materials are mixed, and 360-390 g / t kerosene and 40-70 g / t 2# oil are added for roughing; (2) the obtained rough concentrate is subjected to five times of grinding and six times of separation, and final concentrate and middlings 6 are obtained; (3) after the ores obtained in the previous three times of flotation are combined and concentrated, the underflow is fed into a flotation machine, and 300-350 g / t of kerosene and 30-60 g / t of 2# oil are added for scavenging at the concentration of 3-5% to obtain scavenged concentrate and tailings 2; (4) after scavenged concentrate and concentrated overflow are combined, the step (1) is returned for screening; and the ores obtained after the last three times of flotation are combined and then returned to a third-time regrinding section. The beneficiation method has the beneficial effects that a high-pressure rollermill is adopted for fine crushing treatment, excessive crushing and less grinding are achieved, the granularity of raw materials entering the mill is controlled through pre-screening and check screening, and the circulating load of the mill is reduced; and subsequent grinding and floatation are simplified, the beneficiation process is short, and the production efficiency is high.

The invention discloses a design method of a superfine powder concentrator based on coarse and fine separation of semi-finished products. The superfine powder concentrator comprises a shell, a guide vane and a cage type rotor, wherein a coarse powder discharge port is formed in the bottom of the lower shell; a dynamic powder concentrating, returning and discharging hopper is arranged at the portion, on the lower part of the guide vane, in the shell; the portion, on the outer side of the dynamic powder concentrating, returning and discharging hopper, on the lower part of the cage type rotor is sleeved with a guide device; the guide device comprises a cone part positioned at the upper part and a straight cylinder part positioned at the lower part and is installed on the lower part of the guide vane; the upper shell and the middle shell are separated by the cone part of the guide device; the straight cylinder part of the guide device is positioned on the outer side of the dynamic powder concentrating, returning and discharging hopper so that an inner cylinder and outer cylinder structure can be formed in a static powder selecting area. According to the design method, the static powder concentrating area is additionally arranged in front of a dynamic powder concentrating area, material-carrying airflow is forced to enter the dynamic powder concentrating area from an inner cylinder, the dust collecting efficiency of coarse particles in semi-finished product particles is greatly improved, and the superfine powder concentrating process is facilitated; and the airflow entering the guide vane is distributed more evenly, materials entering a dynamic powder concentrator are closer to finished products, the powder concentrating efficiency is greatly improved, and the circulation load of the dynamic powder concentrator is greatly reduced.

The invention relates to a finish grinding system for a cement roller press. The finish grinding system comprises an outer circulation vertical mill, a first elevator, a vibrating screen, a steady-flow bin, the roll press, a second elevator, a powder selecting assembly, a dust collector, a chute, a fan and a chimney, wherein a discharging port of the outer circulation vertical mill is connected with a feeding port of the first elevator, a discharging port of the first elevator is connected with a feeding port of the vibrating screen, a discharging port of the vibrating screen is connected witha feeding port of the steady-flow bin, a discharging port of the steady-flow bin is connected with a feeding port of the roller press, a discharging port of the roller press is connected with a feeding port of the second elevator, a discharging port of the second elevator is connected with a feeding port of the powder selecting assembly, a powder discharging port of the powder selecting assemblyis connected with the feeding port of the steady-flow bin. According to the finish grinding system, the feeding granularity is controlled, so that the roller gap fluctuation of the roller press is small, and thus the vibration strength of the roller press is greatly weakened, the cement performance is ensured, and meanwhile the cycle load and the energy consumption are reduced.

A grinding and grading system and method capable of controlling the reverse enrichment of iron minerals, the system includes an ore feeding slurry tank, an ore feeding pump, a double overflow pipe cyclone, a sand settling ore slurry tank, a mill, and a first sorting equipment. And open-circuit grinding mill, double overflow tube cyclone is equipped with cyclone inlet, sand settling outlet, outer overflow outlet and inner overflow outlet, the outlet of the feeding slurry tank is connected with the inlet of the feeding pump, feeding The outlet of the pump is connected to the inlet of the cyclone, the outlet of the sand settling is connected to the inlet of the mill, the outlet of the mill is connected to the ore feeding slurry tank, the overflow outlet is connected to the first sorting equipment, and the inner overflow outlet is connected to the open-circuit grinding mill. The inlet is connected, and the outlet of the open-circuit grinding mill is connected with the first sorting equipment; the method is to send the pulp into the double overflow tube cyclone for classification, and separate the graded sand settling products, external overflow products and internal overflow products. to be processed. The invention can reduce the anti-concentration of iron minerals in the sand, improve the processing capacity of the mill, reduce the energy consumption of grinding and improve the quality of concentrate products.

The present invention is a new process and technology for large granulation of ammonium bicarbonate. A novel gas distributor is adopted, which does not destroy the crystal, distributes the gas evenly, prevents blockage and has no resistance; improves the cooling water flow, makes the temperature of the tower more reasonable and suitable for the production of large particles, and saves water; improves the process flow, and the fine crystals that escape with the mother liquor can be kept at any time Directly return to the main tower to continue to grow, single main tower small cycle, reduce cycle load, save power The particle grows faster and the particle size is larger; choose a thickener to reduce crystal escape, the particle continues to grow larger, and prevents clogging; Modify The original index improves the traditional operation, the crystallization stays in the tower for a long time, and the crystallization growth process is long, so that the particle size increases significantly.

The invention belongs to the technical field of screening of vibrating screens, and particularly relates to a method for improving the screening efficiency of a vibrating screen. The vibrating screencomprises a screen stencil, a belt conveyor and a speed reducer connected with a motor. The method comprises the following steps: selecting the screen stencil, adjusting the angle of inclination of the screen stencil, adjusting the ore feeding capacity, adjusting the speed reducer to change the vibration speed of the vibrating screen, and observing the thickness of a to-be-screened material layerof the vibrating screen, thereby determining the feeding speed and the ore feeding capacity of the belt conveyor. According to the method, the vibrating screening efficiency is improved by selecting the proper screen stencil to reduce blocking of screen meshes; the transmission ratio of the speed reducer is adjusted at the proper time, so that the circulating load of the vibrating screen is reduced, and the vibrating screening efficiency is improved; the circulating load of the vibrating screen is reduced by adjusting the screening angle of the vibrating screen; and the feeding speed and the ore feeding capacity of the belt conveyor are adjusted by adjusting the to-be-screened material layer to improve the screening efficiency of the vibrating screen.

An iron ore circulating classification beneficiation method includes the steps that (1), raw ore with the grain size ranging from 0 mm to 50 mm is conveyed into a high-pressure roller mill to be subjected to roller pressing, after the roller pressing index reaches the standard, a roller-pressed product is conveyed to a dry magnetic separator to be subjected to dry type separation, and three products including concentrates, middlings and tailings are obtained through separation; (2) the above middlings are returned to a feeding bin of the high-pressure roller mill and form a mixed material together with new raw ore, roller pressing continues, the step (1) is repeatedly executed, and a closed loop is formed; and (3) the separation concentrates obtained in the step (1) and in the step (2) are conveyed to a concentrate storage yard through a material bearing belt, the tailings obtained in the step (1) and in the step (2) are conveyed to a tailing storage yard through a material bearing belt, and beneficiation is completed. The concentrates obtained through separation are high in grade, the tailings obtained through separation are low in grade, the recovery rate is high, and cost is greatly saved.

The present invention relates to a sorting-grade pre-selection and tailing-throwing process of extremely poor hematite, which includes semi-autogenous grinding to obtain semi-autogenous grinding ore discharge with a particle size of 14-0 mm, and is characterized in that it also includes screening and coarse-grain pre-selection I , Coarse grain pre-selection II, one-stage closed-circuit grinding, coarse-grain pre-selection III, second-stage closed-circuit grinding; screening adopts three-layer linear vibrating screen, and among the four products, ‑14mm~10mm particle size returns to semi-autogenous grinding, and ‑10mm~6mm and ‑6mm~2mm particle size are pre-selected by coarse-grain pre-selection Ⅰ and coarse-grain pre-selection Ⅱ respectively, and the coarse-grained tailings are thrown out. The 2mm particle size is fed into the coarse-grain pre-selection operation III pre-selection tailings, the coarse-grain pre-selection operation III concentrate is fed into the second-stage closed-circuit grinding, and the overflow from the second-stage closed-circuit grinding is fed into the subsequent separation operation. The advantages are: the ore discharge is divided into narrow grades and pre-selected separately, qualified coarse tailings are thrown out, the problem of persistent rock accumulation is solved, and the processing capacity of the semi-autogenous mill is improved.

The invention discloses a flotation production line. The flotation production line comprises at least two stirring barrels connected to feeding pipes, an overflow port is formed in the top of each stirring barrel, a discharging pipe is arranged at the bottom of each overflow port, and the discharging pipes can be connected to the feeding pipes so that all the stirring barrels can be connected in series. The flotation production line comprises at least two stirring barrels, the stirring barrels are connected in series, and ore pulp enters the previous stirring barrel through the feeding pipe, flows out from the overflow port after being stirred and then flows into the next stirring barrel along the discharging pipe. Although the in-series connection of the stirring barrels shortens the retention time of ore pulp in a single stirring barrel, the process requirement of the stirring time can be met by adjusting the number of barrels connected in series and the volume of the single barrel.Ore pulp and a flotation agent can be fully stirred in the stirring barrel, so that the ore surfaces are fully mixed with the flotation agent, and the mineralization reaction effect is improved. The consumption of a flotation reagent is reduced, the waste of the flotation reagent is avoided, and the circulating load of the flotation machine can be greatly reduced, so that the flotation process index is more stable and the flotation recovery rate is obviously improved.

The invention discloses a mineral separation material vibrating sieve for improving the sieving efficiency. The whole mineral separation material vibrating sieve is firm in structure, small in occupied area, abrasion resistant, high in efficiency, simple in structure, easy to operate and good in transmission performance, maintenance and replacement of assemblies are easier compared with traditional equipment, and the maintenance cost is reduced. The bottom of a sieving box is a sieving plate. A sieving hole is formed in the sieving plate. The sieving hole is composed of a straight hole sectionon the upper portion and a lower portion arc-shaped hole section connected with the straight hole section with the small upper part and the large lower part. According to the mineral separation material vibrating sieve for improving the sieving efficiency, it can be ensued that the sieving hole of the sieving plate is in an inverted funnel shape, and the strength, the abrasion resistant degree and the hole opening rate of the sieving plate can also be ensured; by adopting the sieving plate, the service life of the sieving plate is prolonged; and the sieving efficiency is increased by 3%, andthe system cycle load is reduced.

The invention belongs to the technical field of white Portland cement, and particularly relates to a novel dry-process white cement raw material preparation device and process. The novel dry-process white cement raw material preparation device comprises a silicon-aluminum raw material grinding system and a calcium raw material grinding system, wherein the silicon-aluminum raw material grinding system is used for grinding silicon-aluminum raw material with poor grindability, the calcium raw material grinding system is used for grinding and sorting calcium raw material with good grindability, and mixing with the qualified-fineness silicon-aluminum raw material ground through the silicon-aluminum raw material grinding system is carried out. The novel dry white cement raw material preparationdevice and process can improve the quality of a raw material finished product, the raw material components are stable, the system energy consumption is low, and the heat consumption is low.

The invention relates to a simple magnetic separation process for Anshan type iron carbonate-containing lean magnetite ore. The process includes ore grinding, grading and magnetic separation and comprises the following concrete steps: ore grinding three times; presorting with a large-wrap angle medium-intensity magnet separator; grading with a cyclone three times; dehydration in three stages; fine sieving in two stages; and magnetic separation with a magnet separator in four stages. The invention provides the energy-saving, low-carbon, environment-friendly and reliable production process for treatment of iron carbonate-containing lean magnetite ore by using a simple magnetic separation method; the process can further improve treating capability, enhance technical and economic indexes, reduce production cost and greatly increase the utilization efficiency of inferior resources while improving ore grinding, grading and sorting efficiency.

The invention discloses an iron ore mixed ore dressing process, which is based on magnetite and hematite mixed ore with the ore dressing scale of 4800000 t annual treatment capacity and the raw ore grade of 33.5%, the magnetic iron occupancy of 18% and the silicon content of 32.5%, first-stage weak magnetic concentrate and first-stage strong magnetic concentrate are ground and separated according to different disseminated particle size characteristics of the magnetite and the hematite minerals, and the first-stage weak magnetic concentrate and the first-stage strong magnetic concentrate are separated and separated according to the disseminated particle size characteristics of the magnetite and the hematite minerals. According to different ore monomer dissociation granularities, separate grinding and separation are achieved, the comprehensive fineness content of three-section ore grinding is increased to 86% from 80%, the grade of three-section weak magnetic concentrate is increased to 67% or above from 65%, it can be guaranteed that the iron ore concentrate recovery rate is 70.50% and the iron ore concentrate silicon content is smaller than 6.6% while it is guaranteed that the comprehensive iron ore concentrate grade in the whole process is 63.80%, and on the premise that the cost is not increased, the iron ore concentrate recovery rate is greatly increased. 0.54 million t of iron ore concentrate with the grade of 63.80% or above can be increased every year; after separate grinding and separation are carried out, the volume of ore pulp entering the vertical mill is reduced, the ore grinding circulation load of the vertical mill is reduced to 350% from 460%, one of five vertical mills can be stopped and started, and the electric quantity per hour is saved by 1190 kW.