CN201415147Y

CN201415147Y - Material grinding system

Info

Publication number: CN201415147Y
Application number: CN200920043296XU
Authority: CN
Inventors: 李安平; 康宇; 陈艳征; 张戈; 徐靖; 李立华; 曹酒毓
Original assignee: NANJING KAISHENG CEMENT TECHNOLOGY ENGINEERING Co Ltd
Current assignee: NANJING KAISHENG CEMENT TECHNOLOGY ENGINEERING Co Ltd
Priority date: 2009-06-26
Filing date: 2009-06-26
Publication date: 2010-03-03
Anticipated expiration: 2019-06-26

Abstract

The utility model discloses a material grinding system, which comprises a feeding device, a vertical mill, a feeding device, a tube mill, an elevator, a powder selector, a dust collector and a fan, wherein a grading device is arranged between the vertical mill and the tube mill, and the grading device is in a gravity type, the vertical mill is not provided with the powder selector, materials are fed into the vertical mill through the feeding device, powder which is grinded by the vertical mill is fed into the gravity type grading device through the feeding device, coarse granule powder returnsto the vertical mill to circularly grind, fine granule powder is fed into the tube mill to grind, powder from the tube mill is fed into the powder selector through the elevator, the fine powder is collected to be end products through the dust collector, and coarser powder returns to the tub mill to circularly grind. The grading device is utilized to simply grade materials which are grinded by thevertical mill without energy of electricity, pneumatic energy and the like, coarse powder returns to the vertical mill to circularly grind for reducing the vibration of the vertical mill, fine powderenters the tube mill to grind for further reaching the effects of optimizing the tube mill and saving energy of powder grinding, and the grading device is provided with a blockage clearing device forclearing blockage when materials are blocked. The material grinding system has simple flow process, is highly-effective, and saves energy.

Description

A kind of material grinding system

Technical field

The utility model relates to a kind of grinding system of Inorganic Non-metallic Materials, relates in particular to a kind of system that is used for cement grinding.

Background technology

The industrial material grinding system of Inorganic Non-metallic Materials is mainly by following several: a tube mill open stream, closed-circuit grinding system, the series connection grinding system of many tube mills, the grinding system that pre-milling equipment and tube mill are formed, final grinding system of roll squeezer, Vertical Mill final grinding system.The capacity usage ratio of tube mill is extremely low, makes the material grinding power consumption very high; Though final grinding system of roll squeezer and Vertical Mill final grinding system can reduce power consumption greatly, be used for mineral, raw material and cement industry raw material and obtained good effect, because of cement performance and the cement quality problem for preparing is difficult to widely apply on cement production; Pre-milling equipment such as disintegrating machine, roll squeezer, Vertical Mill and tube mill are united use and not only can be reduced power consumption, and the cement performance of preparation satisfies quality requirement and engineering is used.

Though disintegrating machine can reduce going into the tube mill material particular diameter to a certain extent, it is limited to reduce amplitude, can not show a candle to roll squeezer and Vertical Mill.Roll squeezer and Vertical Mill grinding all belong to the material bed and pulverize, when material bed is pulverized, directly the amounts of particles that contact with equipment seldom, particle under high pressure forms expects bed, the transmission of stress is mainly by particle itself, and particle and adjacent particles interact and produce crack, fracture, splitting, pulverizing.

The roll squeezer side is defined, and the material bed side of Vertical Mill is not limited, and to the limited material bed in side, with the increase of functional level, specific area increases in a relative broad range, and capacity usage ratio remains unchanged substantially; The geometry of force body can influence the transmission of material bed internal stress and the distribution of stress intensity, and the force body of roll squeezer is post-post, and the force body of Vertical Mill is post-plate, and post-plate capacity usage ratio is higher than post-post; The roll squeezer material of milling is once finished, and the Vertical Mill material of milling is repeatedly to roll, and Vertical Mill is than roll squeezer capacity usage ratio height; The material that roll squeezer extrudes is expected cake often, disperse and consumed energy again; Vertical Mill has extruding and shears the grinding effect, and roll squeezer only has squeezing action, and when raw meal particle size was inhomogeneous, the tiny direct roll gap from roll squeezer of particle meeting leaked down and can not get grinding; Roll squeezer is simple extruding grinding, and line pressure is very high, and the roller surfaces overlay cladding is peeled off sometimes and come off; The equipment failure rate of Vertical Mill is low, and is stable.Therefore and tube mill unite use, more have superiority than roll squeezer as pre-milling equipment Vertical Mill.

Vertical Mill has absolute energy-conservation advantage in material fragmentation and grinding process, but in the grinding preparation of cement, the whole grinding of Vertical Mill also need solve cement performance and satisfy quality and engineering application problem and the bigger problem of vibration, last one program need could be controlled cement quality preferably through tube mill at present, and the tube mill capacity usage ratio is very low, how can make most merits of cement grinding in Vertical Mill, bring into play, tube mill only need be done a small amount of merit and finish last powder-grinding process, come maximum energy efficient? in the cement production of reality industry, Vertical Mill, tube mill combination grinding cement also has application example, mainly be that the Vertical Mill material of milling is directly into tube mill, the material that this mode enters tube mill contains meal, make the power consumption of tube mill strengthen, how can find a more energy-conservation Vertical Mill, pipe mill combination grinding mode is the urgent problem that solves.

The utility model content

The technical problem that the utility model solved has provided a kind of material grinding system of efficient energy-saving.

The utility model is achieved through the following technical solutions:

A kind of material grinding system comprises pay-off, Vertical Mill, pay-off, tube mill, elevator, powder concentrator, dust-precipitator, blower fan; Between Vertical Mill and the tube mill grading plant is set, described grading plant is the gravity type grading plant; Described Vertical Mill is not with powder concentrator; Material feeds Vertical Mill by pay-off, the powder that Vertical Mill was milled is through pay-off feeding gravity type grading plant, the coarse granule powder returns the Vertical Mill circulation and mills, fine granular powder feeding tube mill grinding, the powder that goes out tube mill feeds powder concentrator through elevator, the fine powder body is received by dust-precipitator and is finished product, coarse dispersion recurrent canal grinding machine circulation grinding partially.

As a kind of improvement of the present utility model, described gravity type grading plant is unpowered driving gravity type grading plant.

As further improvement of the utility model, described gravity type grading plant is provided with the block clearing device.

Described gravity type grading plant bottom surface is provided with screen cloth, screen size≤10mm.Angle between described screen cloth and the horizontal plane≤80 °.The described angle number of degrees can be regulated.

As further improvement of the utility model, described screen cloth is as a whole or be divided into plurality of sections.

The beneficial effects of the utility model:

1, the gravity type grading plant is the Vertical Mill stock grading of milling, and made full use of the advantage of the broken and tube mill grinding of Vertical Mill, will greatly reduce the power consumption of material grinding;

2, the simple classification of material that utilizes unpowered driving gravity type grading plant that Vertical Mill was milled, need not electric power, strength homenergic, just when putty, utilize the less energy block clearing, meal returns Vertical Mill circulation grinding to reduce the Vertical Mill vibration, and fine powder is gone into the tube mill grinding and optimized tube mill and grinding energy-saving effect further to reach.

3, compared with the closed-circuit grinding system of the pre-grinding of roll squeezer, this grinding system flow process is simple, easy to control, and fault rate is low, and is stable, and energy-saving effect is good.

4, compared with Vertical Mill final grinding system and final grinding system of roll squeezer, product quality is guaranteed on cement production.

5, by regulating the size at angle of inclination, bottom surface, return Vertical Mill and the inventory and the fineness of going into tube mill with control, and then thereby the void condition of material reaches the purpose that reduces the Vertical Mill vibration in the adjusting Vertical Mill, also can control and adjust the design parameter and the mill efficiency of tube mill.

Description of drawings

Fig. 1 is a system flow chart of the present utility model.

Fig. 2 is a gravity type grading plant schematic diagram of the present utility model.

Fig. 3 is the gravity type grading plant schematic diagram of the utility model a kind of bottom surface segmentation.

Fig. 4 is the gravity type grading plant schematic diagram of the another kind of bottom surface segmentation of the utility model.

The specific embodiment

For further understanding content of the present utility model, specify preferred embodiment of the present utility model with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4.

A kind of material grinding system comprises pay-off 1, Vertical Mill 2, pay-off 3, grading plant 4, tube mill 5, elevator 6, powder concentrator 7, dust-precipitator 8, blower fan 9; Vertical Mill 2 is not with powder concentrator; Grading plant 4 is the gravity type grading plant, is arranged between Vertical Mill and the tube mill; Material is by pay-off 1 feeding Vertical Mill 2, the powder that Vertical Mill 2 was milled is through pay-off 3 feeding gravity type grading plants, the coarse granule powder returns Vertical Mill 2 circulations and mills, fine granular powder feeding tube mill 5 grindings, go out tube mill 5 powders through elevator 6 feeding powder concentrators 7, the fine powder body is received by dust-precipitator 8 and is finished product, coarse dispersion recurrent canal grinding machine circulation grinding partially.Vertical Mill itself is not with powder concentrator, reduces the power consumption of powder concentrator and configuration blower fan; The classified device of material after milling is divided into thick, thin two kinds of powders with material, and coarse dispersion returns the Vertical Mill circulation and mills, and has filled the space between bulk materials in the Vertical Mill again simultaneously, has reduced the vibration that produces when Vertical Mill is milled greatly; Fine powder body feeding tube mill, tube mill is only brought into play the grinding effect and is got final product, do not need the extremely low fragmentation of material performance capacity usage ratio, the material of going into tube mill has only fines, the grinding abrasive body size of tube mill configuration can reduce greatly, abrasive body and material contact-making surface can be more, thereby improved mill efficiency.

As preferred version of the present utility model, the gravity type grading plant is unpowered driving gravity type grading plant, and material is discharging under the gravity effect after Vertical Mill is milled, and with the simple classification of material, need not electric power, strength homenergic, greatly improves the grinding energy-saving effect.

Can be provided with the block clearing device on the unpowered driving gravity type grading plant, effect makes material be sprinkling upon on the screen cloth bottom surface of grading plant to a need according to gravity generally speaking, by screen cloth material is divided into the thickness powder, only when putty takes place, utilizes the block clearing device to carry out block clearing.The putty situation appears in powder when carrying out classification by unpowered driving gravity type grading plant in case Vertical Mill is milled, can take following block clearing mode: the sieve end, is provided with air bubble and carries out block clearing, or utilize compressed air to carry out block clearing, or rapping apparatus is set carries out block clearing etc. by the fixing extension connecting rod in the rapping sieve end, used energy is much smaller compared with power classifying equipoments such as powder concentrator and vibratory sieves, thereby reaches purpose of energy saving.If carry out air bubble, compressed air or gas block clearing meeting a small amount of fine powder is rolled onto in the meal, returns Vertical Mill together, can fill the space of material in the Vertical Mill, the Vertical Mill vibration further can reduce; The base area design of grading plant changes with material output, return Vertical Mill and the requirement of going into the inventory of tube mill after satisfying classification, if minimum part sieve aperture putty situation only occurs, have a small amount of fines and can return Vertical Mill, do not influence sub-material operation, can also further fill the material space in the Vertical Mill and further reduce the Vertical Mill vibration; This grading plant does not have the situation of coarse dispersion feeding tube mill, goes into the material that tube mill mills like this and can guarantee to be the fine powder body, and tube mill will obtain to stablize, energy-conservation grinding effect.

Can control the inventory of returning Vertical Mill and then reduce the Vertical Mill vibration according to the vibration situation design of Vertical Mill and the angle of inclination of adjustment grading plant bottom surface.By regulating the size at angle of inclination, bottom surface, return Vertical Mill and the inventory and the fineness of going into tube mill with control, and then thereby the void condition of material reaches the purpose that reduces the Vertical Mill vibration in the adjusting Vertical Mill, also can control and adjust the design parameter and the mill efficiency of tube mill.The regulative mode of sieve base angle degree can be: at the sieve end alignment pin is set and regulates, or sieve about the end two ends (is with reference to figure with Fig. 2) elevating lever be set regulate sieve base angle degree etc.Can also design the serial gravity type grading plant of different mesh sizes, control granularity and inventory, and then improve and adjust the design and the operation conditions of tube mill into the tube mill material by the size in design aperture, bottom surface.

Can be as a whole at the bottom of the sieve of grading plant of the present utility model, also can be the form of minute plurality of sections, Fig. 3 and Fig. 4 are two examples wherein, the segmentation form comprises left and right sides segmentation, front and back segmentation, various ways such as segmentation up and down.

The material of going into pay-off 1 can be the mixture of clinker, adjustable solidification agent, composite material, industrial residue, mineral, raw material and their any combinations, and the material combining form of grinding can be multiple; Powder material thinner or easily mill can be a finished product and directly enter tube mill 5 grindings without Vertical Mill 2 pre-grindings, only needs will expect that at the tube mill feeding mouth road charging scraper-trough conveyer of plusing fifteen the adding tube mill gets final product; The moisture of material needs control, if moisture is excessive, grading plant putty situation can be serious, needs to reenter grinding system after the oven dry, also Vertical Mill can be designed to have the Vertical Mill of drying function.

In the utility model, grading plant 4 returns coarse dispersion to Vertical Mill 2 grinding that circulates, and the fine powder body is processed as finished product through tube mill, has given full play to the superiority of two kinds of milling equipments, thereby has reached the qualified and purpose of energy saving of product.Moreover, the utility model flow process is simple, easily-controlled operation, stable, thereby equipment investment cost and operating cost have been saved, be a much progress of the industrial energy-conservation grinding technology of Inorganic Non-metallic Materials, the energy-saving and emission-reduction to building materials industry have huge contribution especially, and its application prospect is very wide.

The utility model can also have other embodiment, and the technical scheme that the mode of equal replacement of all employings or equivalent transformation forms all drops in the protection domain of the present utility model.

Claims

1, a kind of material grinding system comprises pay-off (1), Vertical Mill (2), pay-off (3), tube mill (5), elevator (6), powder concentrator (7), dust-precipitator (8), blower fan (9); It is characterized in that: between Vertical Mill (2) and the tube mill (5) grading plant (4) is set, described grading plant is the gravity type grading plant; Described Vertical Mill (2) is not with powder concentrator; Material is by pay-off (1) feeding Vertical Mill (2), the powder that Vertical Mill (2) was milled is through pay-off (3) feeding gravity type grading plant, the coarse granule powder returns Vertical Mill (2) circulation and mills, fine granular powder feeding tube mill (5) grinding, the powder that goes out tube mill (5) is through elevator (6) feeding powder concentrator (7), the fine powder body is received by dust-precipitator (8) and is finished product, coarse dispersion recurrent canal grinding machine (5) circulation grinding partially.

2, material grinding system according to claim 1: it is characterized in that: described gravity type grading plant is unpowered driving gravity type grading plant.

3, material grinding system according to claim 1: it is characterized in that: described gravity type grading plant is provided with the block clearing device.

4, according to claim 2 or 3 described material grinding systems: it is characterized in that: described gravity type grading plant bottom surface is provided with screen cloth, screen size≤10mm.

5, material grinding system according to claim 4: it is characterized in that: the angle between described screen cloth and the horizontal plane≤80 °.

6, a kind of energy-conservation material grinding system according to claim 5: it is characterized in that: the described angle number of degrees can be regulated.

7, a kind of energy-conservation material grinding system according to claim 4: it is characterized in that: described screen cloth is as a whole or be divided into plurality of sections.