CN110180661B - Preparation method of inorganic filler for preparing nitrile glove - Google Patents

Abstract

The invention discloses a preparation method of an inorganic filler for preparing nitrile gloves. The inorganic filler comprises the following raw material components in parts by weight: 82-93 parts of heavy calcium carbonate fine powder, 3-6 parts of talcum powder, 3-6 parts of gypsum, 0.5-3 parts of surface modifier, 0.5-3 parts of surface activator, 3-8 parts of dispersing agent, 2-4 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate. According to the invention, the superfine inorganic filler with the particle size of less than 1 mu m is prepared by optimizing the formula, the process and the equipment, so that the particle size and the particle size distribution are reduced, and the dispersibility of the inorganic filler in the nitrile emulsion is improved; in addition, the Raymond mill is improved, the abrasion is reduced, the noise is reduced, and the grinding machine is suitable for grinding superfine materials.

Description

Preparation method of inorganic filler for preparing nitrile glove

Technical Field

The invention relates to an inorganic filler and a preparation method thereof, in particular to an inorganic filler for preparing nitrile gloves and a preparation method thereof.

Background

With the increasing awareness of safety, the amount of disposable gloves used has increased rapidly. The disposable health protective glove is mainly used in the fields of medical operation, medical examination, medical care, food processing, electronic industry, household daily care and the like, wherein the consumption of the medical industry and the food industry is the largest. The butyronitrile glove is a perfect glove integrating toughness and high elasticity, does not contain latex protein which can cause anaphylactic reaction, is a substitute product of natural latex glove, and has wide application in the industries of medical treatment, food, chemical industry and the like.

The high-end inorganic filler used for preparing the nitrile glove is monopoly by foreign products, has high price and is unfavorable for the long-term and healthy development of national enterprises. The prior art discloses an invention, grant bulletin No. CN101775238B, grant bulletin No. 20130109, application number CN201010103151.1, and name of an active superfine grinding calcium carbonate processing method, wherein the active superfine grinding calcium carbonate processing technology comprises (1) respectively crushing calcite with the feed of less than 400mm by a jaw crusher and a hammer crusher to obtain calcite with the grain diameter of less than 5mm, and storing the calcite in a storage bin; (2) Classifying the materials by a storage bin through a three-stage crushing and classifying machine, and returning the classified materials to the storage bin without reaching the standard; (3) Classifying the material reaching the standard, and performing activating modification of an activating agent in a turbine mill. The particle size of the calcite after classification in the prior art reaches 1.7 mu m, so that the flexibility of the filling product is improved, the tensile property and the impact property are improved, but the following problems still exist: 1. in order to prepare superfine calcium carbonate, materials are required to be crushed and ground for multiple times, and the process and grinding equipment adopted in the prior art cannot control the particle size of the materials to be less than 1 mu m, usually 1-3 mu m, and have larger particle size and wider particle size distribution, so that the elasticity, the wear resistance and the compactness of the butyronitrile glove are directly affected; 2. the calcium carbonate filler in the prior art has poor dispersibility in the nitrile emulsion and affects the stability of the product.

At present, in the preparation process of superfine filler, a Raymond mill powder machine is generally adopted for grinding, the prior art discloses an invention, an authorized bulletin No. CN104998727B, an authorized bulletin date 20170531, an application number CN201510506413.1 and a name of the high-efficiency Raymond mill powder machine, the high-efficiency Raymond mill powder machine comprises a machine seat provided with an inner cavity which is axially communicated, an outer cylinder body is arranged above the machine seat, a classifier is arranged at the top of the outer cylinder body, and a classifying impeller of the classifier is positioned at the top of the inner cavity of the outer cylinder body; the lower part of the inner cavity of the machine base is fixedly connected with a shaft seat, the shaft seat is rotationally connected with a main shaft, the upper end of the main shaft extends into the inner cavity of the outer cylinder body, and the lower end of the main shaft penetrates out of the machine base and can be in power connection with a driving device; the upper end of the main shaft is connected with a grinding roller support, a plurality of grinding roller shafts are hinged on the grinding roller support, and grinding rollers are arranged at the lower ends of the grinding roller shafts; the upper part of the inner cavity of the machine base is fixedly connected with a grinding ring which can be matched with the grinding roller to realize material grinding; the cavity section of the inner cavity of the machine base, which is positioned between the grinding ring and the shaft seat, is a shovel cavity, a shovel blade rotating disc which is fixedly connected to the main shaft and the outer edge of which is connected with a shovel blade is arranged in the shovel cavity, and a feed inlet is arranged on the outer cylinder; the shaft seat is provided with an air inlet hole, and the air inlet hole communicates the shovel cavity with the external space at the bottom of the machine seat so as to realize bottom air inlet of the Raymond mill. However, the following problems still occur: the grinding roller in the prior art directly impacts on the grinding ring under the action of centrifugal force, the materials are extruded and ground through friction during rotation, when the ground particles are thicker, the thickness of a material layer between the grinding roller and the grinding ring is thicker, at the moment, the abrasion is smaller, however, when the superfine materials are ground, the thickness of the material layer between the grinding roller and the grinding ring is too thin, the grinding roller and the grinding ring are easily in direct contact under the action of the centrifugal force, so that dry grinding is generated, the abrasion is serious, the noise is large, and therefore, the superfine materials cannot be ground.

Disclosure of Invention

The invention aims to provide an inorganic filler for preparing nitrile gloves and a preparation method thereof, wherein the superfine inorganic filler with the particle size of less than 1 mu m is prepared by optimizing a formula, a process and equipment, the particle size and the particle size distribution are reduced, and the dispersibility of the inorganic filler in nitrile emulsion is improved; in addition, the Raymond mill is improved, the abrasion is reduced, the noise is reduced, and the grinding machine is suitable for grinding superfine materials.

In order to achieve the aim of the invention, the inorganic filler used for preparing the nitrile glove and the preparation method thereof adopt the following technical scheme:

an inorganic filler for preparing nitrile gloves comprises the following raw material components in parts by weight: 82-93 parts of heavy calcium carbonate fine powder, 3-6 parts of talcum powder, 3-6 parts of gypsum, 0.5-3 parts of surface modifier, 0.5-3 parts of surface activator, 3-8 parts of dispersing agent, 2-4 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate.

A preparation method of an inorganic filler for preparing nitrile gloves comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a storage bin through bucket lifting, and conveying the ore in the storage bin to a Raymond mill through a conveyor for grinding for 5-8 hours to obtain heavy calcium carbonate fine powder;

(II) weighing 82-93 parts by weight of the heavy calcium carbonate fine powder prepared in the step 4), 3-6 parts by weight of talcum powder, 3-6 parts by weight of gypsum, 0.5-3 parts by weight of surfactant, 3-8 parts by weight of dispersing agent, 2-4 parts by weight of anti-sedimentation agent and a proper amount of deionized water, placing the mixture into a high-speed mixer for stirring and mixing, and stirring and dispersing for 3-10 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 2-4 hours, and heating at 105-120 ℃ to obtain powder B;

(IV) placing the powder B obtained in the step (III) into a Raymond mill for primary grinding for 5-20 hours to obtain powder C;

(V) weighing 0.5-3 parts of surface modifier and proper amount of deionized water, adding into the powder C prepared in the step (IV), placing into a high-speed mixer, stirring and mixing, and stirring and dispersing for 5-10 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 2-3 hours, and heating at 105-120 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding for 5-10 hours, and grinding into particles with the particle size of less than 1 mu m to obtain the inorganic filler.

Preferably, the Raymond mill comprises a base, the frame top sets up the barrel, the barrel top is equipped with the grader, the hierarchical rotor of grader is located barrel inner chamber top, the barrel lower extreme is equipped with feeder hopper, grinding mechanism and shovel material mechanism, grinding mechanism is including rotating the main shaft of connecting on the frame, the main shaft lower extreme wears out the frame and is connected with drive arrangement power, the main shaft upper end stretches into the barrel inner chamber and is equipped with the mount pad, and the mount pad equipartition has a plurality of grinding roller shafts, and the grinding roller shaft lower extreme is equipped with the grinding roller, the frame is equipped with the grinding ring that grinds with the grinding roller cooperation, the grinding roller shaft is equipped with the fixed subassembly of fixing it on the mount pad, leave the grinding clearance of being convenient for the material circulation between grinding roller and the grinding ring, the main shaft is equipped with the adjusting part that is used for adjusting the grinding clearance size, adjusting part includes a plurality of arc holes of seting up on the mount pad, the center of mount pad is equipped with the driving gear, and driving gear week body meshing is connected with a plurality of driven gears, the centre of a circle position that the mount pad is located the arc route of arc hole is equipped with driven gear, movable roller shaft and wear out the pivot and wear the arc hole.

Preferably, the fixing assembly comprises locking nuts arranged at the upper end and the lower end of the mounting seat, and the locking nuts are in threaded fit with the periphery of the grinding roller shaft.

Preferably, the barrel sets up to split structure, and the barrel is including being used for installing the last section of thick bamboo of grader, still including being used for installing the lower section of thick bamboo of feeder hopper, grinding mechanism and shovel material mechanism, the lower section of thick bamboo is equipped with the sealing washer that is used for sealing the clearance between section of thick bamboo and the lower section of thick bamboo, it is equipped with the lifting unit who is used for driving its lift and opens and shuts down the section of thick bamboo to go up the section of thick bamboo, lifting unit is including setting up the lift cylinder on the frame, and the cylinder of lift cylinder is fixed on the frame, and the piston rod of lift cylinder is articulated with last section of thick bamboo, the frame is equipped with the guide rail of the vertical up-down motion of section of thick bamboo in the drive, it is equipped with the slider of slidable mounting on the guide rail to go up the section of thick bamboo. The barrel body is arranged to be of a split structure, so that the grinding gap is convenient to adjust.

Preferably, the upper end of the driving gear is vertically provided with a plurality of stand columns, the stand columns are uniformly distributed on the driving gear, and a first interval is reserved between every two adjacent stand columns. The first spacing is reserved among the upright posts, so that the insertion of the crow bars is facilitated, the driving gear is driven to rotate, and the grinding gap is adjusted.

Preferably, the shoveling mechanism comprises a rotary table which is positioned below the grinding mechanism and fixedly connected to the main shaft, and the rotary table is provided with a shovel blade for shoveling materials to the grinding mechanism. And (5) shoveling the materials into a grinding gap by a rotating shovel blade for grinding.

Preferably, the driving device comprises a driving motor, a driving belt pulley is linked with the driving motor, a driven belt pulley is arranged at the lower end of the main shaft, and a belt which is linked with the driving belt pulley is wound around the periphery of the driving belt pulley and the driven belt pulley.

Preferably, the machine base is provided with an air inlet for feeding air into the cylinder body below the grinding mechanism, an air inlet pipe is arranged at the air inlet position, one end of the air inlet pipe is communicated with the air inlet, the other end of the air inlet pipe is communicated with the air blower, and a valve for switching the air inlet is arranged on the air inlet pipe. According to the invention, the air is fed into the air inlet pipe through the air blower, and then enters the cylinder body through the air inlet, meanwhile, the valve is arranged on the air inlet pipe and used for switching the air inlet, so that materials in the cylinder body are conveniently circularly ground, the grinding fineness of the materials is improved, the superfine materials are ground by controlling the grinding time, when the grinding time is enough, the valve is opened, the air blower is enabled to feed air into the cylinder body, and at the moment, the ground superfine components enter the classifier for classification, so that the superfine materials are collected, and the grinding time is increased, so that the grinding of the superfine materials is facilitated.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the polyoxyethylene-polyoxypropylene copolymer is used as a surface modifier, the alkyl polyoxyethylene ether phosphate is used as a surface activator, and the heavy calcium carbonate fine powder is modified, wherein the surface activator alkyl polyoxyethylene ether phosphate plays a role in mediating, so that the surface modifier can be effectively bonded to the surfaces of inorganic particles through chemical bonds, and the coating effect of the surface modifier on the formation of the heavy calcium carbonate can improve the dispersibility of the heavy calcium carbonate in the butyronitrile, thereby increasing the air tightness, elasticity and strength of the butyronitrile glove; in addition, the whiteness of the heavy calcium carbonate can be improved after the gypsum and the heavy calcium carbonate fine powder are mixed and ground, and the lubricating property of the butyronitrile glove can be improved by adding talcum powder, so that the prepared butyronitrile glove is high in smoothness; in addition, the inorganic filler prepared by the method can replace part of resin, so that the production cost of the nitrile glove is further reduced;

2. aiming at the problem of particle size distribution, the invention improves the grinding process and grinding equipment, and the prepared inorganic filler has good dispersibility and controllable cost through equipment improvement and process flow optimization;

3. According to the invention, the particle size of the prepared inorganic filler is smaller than 1 mu m by improving the process flow, and the particle size produced by the prior art is generally 1-3 mu m, so that the particle size and the particle size distribution are greatly reduced compared with those of the inorganic filler, and the application field of the calcium carbonate powder material is widened;

4. according to the invention, by improving the Raymond mill, the dry grinding phenomenon between the grinding roller and the grinding ring is directly avoided aiming at grinding of superfine powder, so that the service life is prolonged, meanwhile, the noise is reduced, the process is further optimized, and the production efficiency is improved.

Drawings

FIG. 1 is a scanning electron microscope image of the first polished wafer in step (IV) according to the embodiment of the invention;

FIG. 2 is a Scanning Electron Microscope (SEM) image after secondary polishing in step (VII) according to an embodiment of the present invention;

FIG. 3 is a graph showing the particle size distribution after primary grinding in the first step (IV) according to the embodiment of the present invention;

FIG. 4 is a graph showing the particle size distribution after secondary grinding in the first step (VII) of the present invention;

FIG. 5 is a schematic diagram of the Raymond mill of the present invention;

FIG. 6 is a schematic view of the adjustment assembly of FIG. 5;

FIG. 7 is a diagram of the adjustment state of the adjustment assembly of the Raymond mill;

FIG. 8 is a schematic diagram of the structure of the Raymond mill after the adjusted grinding gap is enlarged;

FIG. 9 is a schematic view of the adjustment assembly of FIG. 8;

FIG. 10 is a diagram showing the separation of the upper and lower drums of the Raymond mill;

fig. 11 is an enlarged view of a portion a in fig. 5.

The device comprises a driving device 1, a driving motor 101, a driving belt pulley 102, a belt 103, a driven belt pulley 104, a machine seat 2, a lifting component 3, a lifting cylinder 301, a sliding block 302, a guide rail 303, a feeding hopper 4, a grading machine 5, a cylinder 6, an upper cylinder 601, a lower cylinder 602, a sealing ring 603, a mounting seat 7, a grinding roll shaft 8, a grinding ring 9, a grinding roll 10, an air inlet 11, an air inlet pipe 12, a blower 13, a rotary table 14, a main shaft 15, a regulating component 16, a driving gear 16a, a driven gear 16b, a rotary shaft 16c, a connecting rod 16d, a stand 16e, a first interval 16g of arc holes, a scraper knife 18 of the arc holes, a grinding gap 19, a valve 20, an inlet 21, an outlet 22 and a crow bar 23.

Detailed Description

The present invention is further illustrated below in conjunction with the specific embodiments, it being understood that these embodiments are meant to be illustrative of the invention only and not limiting the scope of the invention, and that modifications of the invention, which are equivalent to those skilled in the art to which the invention pertains, will fall within the scope of the invention as defined in the claims appended hereto.

Example 1

As shown in fig. 1-11, an inorganic filler for preparing nitrile gloves comprises the following raw materials in parts by weight: 93 parts of heavy calcium carbonate fine powder, 3 parts of talcum powder, 3 parts of gypsum, 0.5 part of surface modifier, 0.5 part of surface activator, 3 parts of dispersing agent, 2 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the dosage of the deionized water can wet the raw materials of all the components, the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate.

A preparation method of an inorganic filler for preparing nitrile gloves comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a bin through a bucket, conveying the ore in the bin to a Raymond mill through a conveyor for grinding, and grinding in three stages in total, wherein in the first stage, the grinding gap of the Raymond mill is regulated to be 3-5 mm, and the grinding time is 1 hour; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, wherein the grinding time is 2 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 2 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain heavy calcium carbonate fine powder;

(II) weighing 93 parts by weight of the heavy calcium carbonate fine powder prepared in the step 4), 3 parts by weight of talcum powder, 3 parts by weight of gypsum, 0.5 part by weight of surfactant, 3 parts by weight of dispersing agent, 2 parts by weight of anti-sedimentation agent and a proper amount of deionized water, and placing the materials into a high-speed mixer for stirring and mixing, wherein the dosage of the deionized water can wet the raw materials of all the components, and stirring and dispersing the materials for 10 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 2 hours, and heating at 105 ℃ to obtain powder B;

(IV) placing the powder B in the step (III) into a Raymond mill for primary grinding, wherein the primary grinding is divided into three stages in total, and the first stage is to adjust the grinding gap of the Raymond mill to 3-5 mm and the grinding time is 1 hour; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, wherein the grinding time is 2 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 2 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain powder C;

(V) weighing 0.5 part of surface modifier and a proper amount of deionized water, adding the surface modifier and the deionized water into the powder C prepared in the step (IV), wherein the deionized water is used in an amount which wets the raw materials of the components, placing the raw materials into a high-speed mixer for stirring and mixing, and stirring and dispersing for 10 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 2 hours, and heating at 105 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding, wherein the secondary grinding is divided into three stages in total, and the grinding gap of the Raymond mill is regulated to be 3-5 mm in the first stage, and the grinding time is 1 hour; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, wherein the grinding time is 2 hours; and in the third stage, the grinding gap of the Raymond mill is regulated to be less than 1mm, the grinding time is 2 hours, then a valve is opened, air is introduced into a blower, and the ground material is blown into a classifier for classification, so that the inorganic filler is obtained.

As shown in fig. 5 to 11, the raymond mill comprises a base 2, a cylinder 6 is arranged above the base 2, a classifier 5 is arranged at the top of the cylinder 6, a classifying rotor of the classifier 5 is positioned at the top of an inner cavity of the cylinder 6, and specifically, the classifier 5 with the following structure can be adopted, the raymond mill comprises a case connected at the top of the cylinder 6, the case is provided with an inlet 21 and an outlet 22, the inlet 21 of the case is communicated with the inner cavity of the cylinder 6, a feeding hopper 4, a grinding mechanism and a shoveling mechanism are arranged at the lower end of the cylinder 6, an air inlet 11 for feeding air into the cylinder 6 is arranged below the base 2, an air inlet pipe 12 is arranged at the position of the air inlet 11, one end of the air inlet pipe 12 is communicated with the air inlet 11, the other end of the air inlet pipe 12 is communicated with an air blower 13, and a valve 20 for switching the air inlet 11 is arranged on the air inlet pipe 12; the grinding mechanism comprises a main shaft 15 rotationally connected to the machine base 2, the lower end of the main shaft 15 penetrates out of the machine base 2 and is in power connection with the driving device 1, the driving device 1 comprises a driving motor 101, the driving motor 101 is linked with a driving belt pulley 102, the lower end of the main shaft 15 is provided with a driven belt pulley 104, and the peripheries of the driving belt pulley 102 and the driven belt pulley 104 are wound with a linked belt 103; the upper end of a main shaft 15 stretches into the inner cavity of the cylinder body 6 and is provided with an installation seat 7, a plurality of grinding roller shafts 8 are uniformly distributed on the installation seat 7, a grinding roller 10 is arranged at the lower end of each grinding roller shaft 8, a grinding ring 9 matched with the grinding roller 10 for grinding is arranged on the machine base 2, a fixing component for fixing the grinding roller shaft on the installation seat 7 is arranged on each grinding roller shaft 8, a grinding gap 19 convenient for material circulation is reserved between each grinding roller 10 and each grinding ring 9, an adjusting component 16 for adjusting the size of the grinding gap 19 is arranged on the main shaft 15, each adjusting component 16 comprises a plurality of arc-shaped holes 16g which are symmetrically arranged on the installation seat 7 in the center, a driving gear 16a is arranged in the center of the installation seat 7, a plurality of upright columns 16e are vertically arranged at the upper end of each driving gear 16a, a plurality of upright columns 16e are uniformly distributed on the driving gear 16a, and a first interval 16f is reserved between every two adjacent upright columns 16 e; the driving gear 16a is connected with a plurality of driven gears 16b in a whole body meshing way, a rotating shaft 16c for installing the driven gears 16b is arranged at the circle center position of an arc path of the arc hole 16g of the mounting seat 7, the grinding roller shaft 8 is movably arranged in the arc hole 16g in a penetrating way, and the upper end of the grinding roller shaft 8 penetrates out of the arc hole 16g and is provided with a connecting rod 16d fixedly connected with the rotating shaft 16 c; the fixing assembly comprises locking nuts 18 which are arranged at the upper end and the lower end of the mounting seat 7, and the locking nuts 18 are in threaded fit with the periphery of the grinding roller shaft 8; the shoveling mechanism comprises a rotary table 14 which is positioned below the grinding mechanism and fixedly connected to a main shaft 15, and the rotary table 14 is provided with a shovel blade 17 for shoveling materials to the grinding mechanism; the barrel 6 is set to split structure, the barrel 6 is including being used for installing the upper cylinder 601 of grader 5, still including being used for installing feeder hopper 4, grinding mechanism and shovel material mechanism's lower section of thick bamboo 602, lower section of thick bamboo 602 is equipped with the sealing washer 603 that is used for sealing the clearance between upper cylinder 601 and lower section of thick bamboo 602, upper cylinder 601 is equipped with the lift subassembly 3 that is used for driving it to go up and down and open and shut lower section of thick bamboo 602, lift subassembly 3 is including setting up the lift cylinder 301 on frame 2, the cylinder of lift cylinder 301 is fixed on frame 2, the piston rod of lift cylinder 301 articulates with upper cylinder 601, frame 2 is equipped with the guide rail 303 that drives the vertical up-down motion of upper cylinder 601, upper cylinder 601 is equipped with slider 302 of slidable mounting on guide rail 303.

As shown in fig. 1 and 2, the lower left hand label in fig. 1 and 2 is a scale representing a length of 1 micron, and it can be seen that the particle size in fig. 1 is larger than that in fig. 2, and further that the surface roughness of the particles in fig. 2 is higher, indicating successful surface modification of the particles.

As shown in fig. 3 and 4, wherein fig. 3 is the particle size statistics of fig. 1 and fig. 4 is the particle size statistics of fig. 2, it can be seen that the particle size distribution of fig. 3 and 4 is narrow, the difference between the maximum particle size and the minimum particle size is only 0.6 micron, and the modified particle size of fig. 4 is reduced from 1.2 micron to 0.6 micron, therefore, the inorganic filler prepared by the embodiment 1 of the present invention achieves the purpose of reducing the particle size and the particle size distribution by improving the formulation and the process in combination with improving the grinding equipment, and widens the application field.

Example 2

As shown in fig. 5-11, an inorganic filler for preparing nitrile gloves comprises the following raw materials in parts by weight: 82 parts of heavy calcium carbonate fine powder, 6 parts of talcum powder, 6 parts of gypsum, 3 parts of surface modifier, 3 parts of surface activator, 5 parts of dispersing agent, 3 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the dosage of the deionized water can wet the raw materials of all the components, the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate.

A preparation method of an inorganic filler for preparing nitrile gloves comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a bin through a bucket, conveying the ore in the bin to a Raymond mill through a conveyor for grinding, and grinding in three stages in total, wherein in the first stage, the grinding gap of the Raymond mill is regulated to be 3-5 mm, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, wherein the grinding time is 2 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 2 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain heavy calcium carbonate fine powder;

(II) weighing 82 parts of the heavy calcium carbonate fine powder, 6 parts of talcum powder, 6 parts of gypsum, 3 parts of surfactant, 5 parts of dispersing agent, 3 parts of anti-sedimentation agent and a proper amount of deionized water which are prepared in the step 4) according to parts by weight, and placing the mixture into a high-speed mixer for stirring and mixing, wherein the dosage of the deionized water can wet the raw materials of all the components, and stirring and dispersing the raw materials for 5 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 110 ℃ to obtain powder B;

(IV) placing the powder B in the step (III) into a Raymond mill for primary grinding, wherein the primary grinding is divided into three stages in total, and the first stage is to adjust the grinding gap of the Raymond mill to 3-5 mm and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 5 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain powder C;

(V) weighing 3 parts of surface modifier and a proper amount of deionized water, and adding the mixture into the powder C prepared in the step (IV), wherein the dosage of the deionized water can be used for wetting the raw materials of all the components, and placing the raw materials into a high-speed mixer for stirring and mixing, and stirring and dispersing for 5 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 110 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding, wherein the secondary grinding is divided into three stages in total, and the grinding gap of the Raymond mill is regulated to be 3-5 mm in the first stage, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; and in the third stage, the grinding gap of the Raymond mill is regulated to be less than 1mm, the grinding time is 5 hours, then a valve is opened, air is introduced into a blower, and the ground material is blown into a classifier for classification, so that the inorganic filler is obtained.

The Raymond mill comprises a base 2, a cylinder 6 is arranged above the base 2, a classifier 5 is arranged at the top of the cylinder 6, a classifying rotor of the classifier 5 is positioned at the top of an inner cavity of the cylinder 6, and the classifier 5 with the following structure can be adopted specifically, the Raymond mill comprises a case connected at the top of the cylinder 6, the case is provided with an inlet 21 and an outlet 22, the inlet 21 of the case is communicated with the inner cavity of the cylinder 6, the lower end of the cylinder 6 is provided with a feed hopper 4, a grinding mechanism and a shoveling mechanism, the base 2 is positioned below the grinding mechanism and provided with an air inlet 11 for feeding air into the cylinder 6, an air inlet pipe 12 is arranged at the position of the air inlet 11, one end of the air inlet pipe 12 is communicated with the air inlet 11, the other end of the air inlet pipe 12 is communicated with an air blower 13, and a valve 20 for switching the air inlet 11 is arranged on the air inlet pipe 12; the grinding mechanism comprises a main shaft 15 rotationally connected to the machine base 2, the lower end of the main shaft 15 penetrates out of the machine base 2 and is in power connection with the driving device 1, the driving device 1 comprises a driving motor 101, the driving motor 101 is linked with a driving belt pulley 102, the lower end of the main shaft 15 is provided with a driven belt pulley 104, and the peripheries of the driving belt pulley 102 and the driven belt pulley 104 are wound with a linked belt 103; the upper end of a main shaft 15 stretches into the inner cavity of the cylinder body 6 and is provided with an installation seat 7, a plurality of grinding roller shafts 8 are uniformly distributed on the installation seat 7, a grinding roller 10 is arranged at the lower end of each grinding roller shaft 8, a grinding ring 9 matched with the grinding roller 10 for grinding is arranged on the machine base 2, a fixing component for fixing the grinding roller shaft on the installation seat 7 is arranged on each grinding roller shaft 8, a grinding gap 19 convenient for material circulation is reserved between each grinding roller 10 and each grinding ring 9, an adjusting component 16 for adjusting the size of the grinding gap 19 is arranged on the main shaft 15, each adjusting component 16 comprises a plurality of arc-shaped holes 16g which are symmetrically arranged on the installation seat 7 in the center, a driving gear 16a is arranged in the center of the installation seat 7, a plurality of upright columns 16e are vertically arranged at the upper end of each driving gear 16a, a plurality of upright columns 16e are uniformly distributed on the driving gear 16a, and a first interval 16f is reserved between every two adjacent upright columns 16 e; the driving gear 16a is connected with a plurality of driven gears 16b in a whole body meshing way, a rotating shaft 16c for installing the driven gears 16b is arranged at the circle center position of an arc path of the arc hole 16g of the mounting seat 7, the grinding roller shaft 8 is movably arranged in the arc hole 16g in a penetrating way, and the upper end of the grinding roller shaft 8 penetrates out of the arc hole 16g and is provided with a connecting rod 16d fixedly connected with the rotating shaft 16 c; the fixing assembly comprises locking nuts 18 which are arranged at the upper end and the lower end of the mounting seat 7, and the locking nuts 18 are in threaded fit with the periphery of the grinding roller shaft 8; the shoveling mechanism comprises a rotary table 14 which is positioned below the grinding mechanism and fixedly connected to a main shaft 15, and the rotary table 14 is provided with a shovel blade 17 for shoveling materials to the grinding mechanism; the barrel 6 is set to split structure, the barrel 6 is including being used for installing the upper cylinder 601 of grader 5, still including being used for installing feeder hopper 4, grinding mechanism and shovel material mechanism's lower section of thick bamboo 602, lower section of thick bamboo 602 is equipped with the sealing washer 603 that is used for sealing the clearance between upper cylinder 601 and lower section of thick bamboo 602, upper cylinder 601 is equipped with the lift subassembly 3 that is used for driving it to go up and down and open and shut lower section of thick bamboo 602, lift subassembly 3 is including setting up the lift cylinder 301 on frame 2, the cylinder of lift cylinder 301 is fixed on frame 2, the piston rod of lift cylinder 301 articulates with upper cylinder 601, frame 2 is equipped with the guide rail 303 that drives the vertical up-down motion of upper cylinder 601, upper cylinder 601 is equipped with slider 302 of slidable mounting on guide rail 303.

Example 3

As shown in fig. 5-11, an inorganic filler for preparing nitrile gloves comprises the following raw materials in parts by weight: 90 parts of heavy calcium carbonate fine powder, 3 parts of talcum powder, 4 parts of gypsum, 1 part of surface modifier, 2 parts of surface activator, 8 parts of dispersing agent, 4 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the dosage of the deionized water can wet the raw materials of all the components, the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate.

A preparation method of an inorganic filler for preparing nitrile gloves comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a bin through a bucket, conveying the ore in the bin to a Raymond mill through a conveyor for grinding, and grinding in three stages in total, wherein in the first stage, the grinding gap of the Raymond mill is regulated to be 3-5 mm, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 3 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain heavy calcium carbonate fine powder;

(II) weighing 90 parts of heavy calcium carbonate fine powder, 3 parts of talcum powder, 4 parts of gypsum, 2 parts of surfactant, 8 parts of dispersing agent, 4 parts of anti-sedimentation agent and a proper amount of deionized water which are prepared in the step 4) according to parts by weight, and placing the mixture into a high-speed mixer for stirring and mixing, wherein the dosage of the deionized water can wet the raw materials of all the components, and stirring and dispersing the raw materials for 10 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 120 ℃ to obtain powder B;

(IV) placing the powder B in the step (III) into a Raymond mill for primary grinding, wherein the primary grinding is divided into three stages in total, and the first stage is to adjust the grinding gap of the Raymond mill to 3-5 mm and the grinding time is 3 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 5 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 7 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain powder C;

(V) weighing 1 part of surface modifier and a proper amount of deionized water, and adding the surface modifier and the deionized water into the powder C prepared in the step (IV), wherein the dosage of the deionized water can be used for wetting the raw materials of all the components, and placing the raw materials into a high-speed mixer for stirring and mixing, and stirring and dispersing for 10 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 120 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding, wherein the secondary grinding is divided into three stages in total, and the grinding gap of the Raymond mill is regulated to be 3-5 mm in the first stage, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; and in the third stage, the grinding gap of the Raymond mill is regulated to be less than 1mm, the grinding time is 5 hours, then a valve is opened, air is introduced into a blower, and the ground material is blown into a classifier for classification, so that the inorganic filler is obtained.

The Raymond mill comprises a base 2, a cylinder 6 is arranged above the base 2, a classifier 5 is arranged at the top of the cylinder 6, a classifying rotor of the classifier 5 is positioned at the top of an inner cavity of the cylinder 6, and the classifier 5 with the following structure can be adopted specifically, the Raymond mill comprises a case connected at the top of the cylinder 6, the case is provided with an inlet 21 and an outlet 22, the inlet 21 of the case is communicated with the inner cavity of the cylinder 6, the lower end of the cylinder 6 is provided with a feed hopper 4, a grinding mechanism and a shoveling mechanism, the base 2 is positioned below the grinding mechanism and provided with an air inlet 11 for feeding air into the cylinder 6, an air inlet pipe 12 is arranged at the position of the air inlet 11, one end of the air inlet pipe 12 is communicated with the air inlet 11, the other end of the air inlet pipe 12 is communicated with an air blower 13, and a valve 20 for switching the air inlet 11 is arranged on the air inlet pipe 12; the grinding mechanism comprises a main shaft 15 rotationally connected to the machine base 2, the lower end of the main shaft 15 penetrates out of the machine base 2 and is in power connection with the driving device 1, the driving device 1 comprises a driving motor 101, the driving motor 101 is linked with a driving belt pulley 102, the lower end of the main shaft 15 is provided with a driven belt pulley 104, and the peripheries of the driving belt pulley 102 and the driven belt pulley 104 are wound with a linked belt 103; the upper end of a main shaft 15 stretches into the inner cavity of the cylinder body 6 and is provided with an installation seat 7, a plurality of grinding roller shafts 8 are uniformly distributed on the installation seat 7, a grinding roller 10 is arranged at the lower end of each grinding roller shaft 8, a grinding ring 9 matched with the grinding roller 10 for grinding is arranged on the machine base 2, a fixing component for fixing the grinding roller shaft on the installation seat 7 is arranged on each grinding roller shaft 8, a grinding gap 19 convenient for material circulation is reserved between each grinding roller 10 and each grinding ring 9, an adjusting component 16 for adjusting the size of the grinding gap 19 is arranged on the main shaft 15, each adjusting component 16 comprises a plurality of arc-shaped holes 16g which are symmetrically arranged on the installation seat 7 in the center, a driving gear 16a is arranged in the center of the installation seat 7, a plurality of upright columns 16e are vertically arranged at the upper end of each driving gear 16a, a plurality of upright columns 16e are uniformly distributed on the driving gear 16a, and a first interval 16f is reserved between every two adjacent upright columns 16 e; the driving gear 16a is connected with a plurality of driven gears 16b in a whole body meshing way, a rotating shaft 16c for installing the driven gears 16b is arranged at the circle center position of an arc path of the arc hole 16g of the mounting seat 7, the grinding roller shaft 8 is movably arranged in the arc hole 16g in a penetrating way, and the upper end of the grinding roller shaft 8 penetrates out of the arc hole 16g and is provided with a connecting rod 16d fixedly connected with the rotating shaft 16 c; the fixing assembly comprises locking nuts 18 which are arranged at the upper end and the lower end of the mounting seat 7, and the locking nuts 18 are in threaded fit with the periphery of the grinding roller shaft 8; the shoveling mechanism comprises a rotary table 14 which is positioned below the grinding mechanism and fixedly connected to a main shaft 15, and the rotary table 14 is provided with a shovel blade 17 for shoveling materials to the grinding mechanism; the barrel 6 is set to split structure, the barrel 6 is including being used for installing the upper cylinder 601 of grader 5, still including being used for installing feeder hopper 4, grinding mechanism and shovel material mechanism's lower section of thick bamboo 602, lower section of thick bamboo 602 is equipped with the sealing washer 603 that is used for sealing the clearance between upper cylinder 601 and lower section of thick bamboo 602, upper cylinder 601 is equipped with the lift subassembly 3 that is used for driving it to go up and down and open and shut lower section of thick bamboo 602, lift subassembly 3 is including setting up the lift cylinder 301 on frame 2, the cylinder of lift cylinder 301 is fixed on frame 2, the piston rod of lift cylinder 301 articulates with upper cylinder 601, frame 2 is equipped with the guide rail 303 that drives the vertical up-down motion of upper cylinder 601, upper cylinder 601 is equipped with slider 302 of slidable mounting on guide rail 303.

Example 4

As shown in fig. 5-11, an inorganic filler for preparing nitrile gloves comprises the following raw materials in parts by weight: 87 parts of heavy calcium carbonate fine powder, 5 parts of talcum powder, 4 parts of gypsum, 2 parts of surface modifier, 2 parts of surface activator, 6 parts of dispersing agent, 3 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the dosage of the deionized water can wet the raw materials of all the components, the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate.

A preparation method of an inorganic filler for preparing nitrile gloves comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a bin through a bucket, conveying the ore in the bin to a Raymond mill through a conveyor for grinding, and grinding in three stages in total, wherein in the first stage, the grinding gap of the Raymond mill is regulated to be 3-5 mm, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 3 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain heavy calcium carbonate fine powder;

(II) weighing 87 parts by weight of the heavy calcium carbonate fine powder prepared in the step 4), 5 parts by weight of talcum powder, 4 parts by weight of gypsum, 2 parts by weight of surfactant, 6 parts by weight of dispersing agent, 3 parts by weight of anti-sedimentation agent and a proper amount of deionized water, and placing the mixture into a high-speed mixer for stirring and mixing, wherein the dosage of the deionized water can wet the raw materials of all the components, and stirring and dispersing the raw materials for 3 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 120 ℃ to obtain powder B;

(IV) placing the powder B in the step (III) into a Raymond mill for primary grinding, wherein the primary grinding is divided into three stages in total, and the first stage is to adjust the grinding gap of the Raymond mill to 3-5 mm and the grinding time is 5 hours; in the second stage, the grinding gap of the Raymond mill is regulated to be 1-3 mm, and the grinding time is 6 hours; the third stage, adjusting the grinding gap of the Raymond mill to be less than 1mm, grinding for 9 hours, then opening a valve, blowing air into a blower, and blowing the ground material into a classifier for classification to obtain powder C;

(V) weighing 2 parts of surface modifier and a proper amount of deionized water, and adding the surface modifier and the deionized water into the powder C prepared in the step (IV), wherein the dosage of the deionized water can be used for wetting the raw materials of all the components, and placing the raw materials into a high-speed mixer for stirring and mixing, and stirring and dispersing for 10 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 3 hours, and heating at 120 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding, wherein the secondary grinding is divided into three stages in total, and the grinding gap of the Raymond mill is regulated to be 3-5 mm in the first stage, and the grinding time is 2 hours; the second stage, adjusting the grinding gap of the Raymond mill to be 1-3 mm, and grinding for 3 hours; and in the third stage, the grinding gap of the Raymond mill is regulated to be less than 1mm, the grinding time is 3 hours, then a valve is opened, air is introduced into a blower, and the ground material is blown into a classifier for classification, so that the inorganic filler is obtained.

The Raymond mill comprises a base 2, a cylinder 6 is arranged above the base 2, a classifier 5 is arranged at the top of the cylinder 6, a classifying rotor of the classifier 5 is positioned at the top of an inner cavity of the cylinder 6, and the classifier 5 with the following structure can be adopted specifically, the Raymond mill comprises a case connected at the top of the cylinder 6, the case is provided with an inlet 21 and an outlet 22, the inlet 21 of the case is communicated with the inner cavity of the cylinder 6, the lower end of the cylinder 6 is provided with a feed hopper 4, a grinding mechanism and a shoveling mechanism, the base 2 is positioned below the grinding mechanism and provided with an air inlet 11 for feeding air into the cylinder 6, an air inlet pipe 12 is arranged at the position of the air inlet 11, one end of the air inlet pipe 12 is communicated with the air inlet 11, the other end of the air inlet pipe 12 is communicated with an air blower 13, and a valve 20 for switching the air inlet 11 is arranged on the air inlet pipe 12; the grinding mechanism comprises a main shaft 15 rotationally connected to the machine base 2, the lower end of the main shaft 15 penetrates out of the machine base 2 and is in power connection with the driving device 1, the driving device 1 comprises a driving motor 101, the driving motor 101 is linked with a driving belt pulley 102, the lower end of the main shaft 15 is provided with a driven belt pulley 104, and the peripheries of the driving belt pulley 102 and the driven belt pulley 104 are wound with a linked belt 103; the upper end of a main shaft 15 stretches into the inner cavity of the cylinder body 6 and is provided with an installation seat 7, a plurality of grinding roller shafts 8 are uniformly distributed on the installation seat 7, a grinding roller 10 is arranged at the lower end of each grinding roller shaft 8, a grinding ring 9 matched with the grinding roller 10 for grinding is arranged on the machine base 2, a fixing component for fixing the grinding roller shaft on the installation seat 7 is arranged on each grinding roller shaft 8, a grinding gap 19 convenient for material circulation is reserved between each grinding roller 10 and each grinding ring 9, an adjusting component 16 for adjusting the size of the grinding gap 19 is arranged on the main shaft 15, each adjusting component 16 comprises a plurality of arc-shaped holes 16g which are symmetrically arranged on the installation seat 7 in the center, a driving gear 16a is arranged in the center of the installation seat 7, a plurality of upright columns 16e are vertically arranged at the upper end of each driving gear 16a, a plurality of upright columns 16e are uniformly distributed on the driving gear 16a, and a first interval 16f is reserved between every two adjacent upright columns 16 e; the driving gear 16a is connected with a plurality of driven gears 16b in a whole body meshing way, a rotating shaft 16c for installing the driven gears 16b is arranged at the circle center position of an arc path of the arc hole 16g of the mounting seat 7, the grinding roller shaft 8 is movably arranged in the arc hole 16g in a penetrating way, and the upper end of the grinding roller shaft 8 penetrates out of the arc hole 16g and is provided with a connecting rod 16d fixedly connected with the rotating shaft 16 c; the fixing assembly comprises locking nuts 18 which are arranged at the upper end and the lower end of the mounting seat 7, and the locking nuts 18 are in threaded fit with the periphery of the grinding roller shaft 8; the shoveling mechanism comprises a rotary table 14 which is positioned below the grinding mechanism and fixedly connected to a main shaft 15, and the rotary table 14 is provided with a shovel blade 17 for shoveling materials to the grinding mechanism; the barrel 6 is set to split structure, the barrel 6 is including being used for installing the upper cylinder 601 of grader 5, still including being used for installing feeder hopper 4, grinding mechanism and shovel material mechanism's lower section of thick bamboo 602, lower section of thick bamboo 602 is equipped with the sealing washer 603 that is used for sealing the clearance between upper cylinder 601 and lower section of thick bamboo 602, upper cylinder 601 is equipped with the lift subassembly 3 that is used for driving it to go up and down and open and shut lower section of thick bamboo 602, lift subassembly 3 is including setting up the lift cylinder 301 on frame 2, the cylinder of lift cylinder 301 is fixed on frame 2, the piston rod of lift cylinder 301 articulates with upper cylinder 601, frame 2 is equipped with the guide rail 303 that drives the vertical up-down motion of upper cylinder 601, upper cylinder 601 is equipped with slider 302 of slidable mounting on guide rail 303.

The invention relates to a specific working process and principle of a Raymond mill powder machine, which comprises the following steps: the material enters the inner cavity of the cylinder body 6 from the feed hopper 4, then, the driving motor 101 drives the driving belt pulley 102 to rotate, the belt 103 drives the driven belt pulley 104 to rotate, so that the main shaft 15 rotates, the main shaft 15 rotates to drive the rotary table 14 to rotate, so that the scraper knife 17 arranged on the rotary table 14 rotates, meanwhile, the main shaft 15 rotates to drive the mounting seat 7 to rotate, so that the grinding roll shaft 8 and the grinding roll 10 arranged on the mounting seat 7 rotate, at the moment, the material is scraped by the rotating scraper knife 17 and is sent into the grinding gap 19 between the grinding roll 10 and the grinding ring 9, the material is crushed by rotating friction, the grinding time is set according to the requirement, after the grinding is finished, the valve 20 of the air inlet pipe 12 is opened, the air blower 13 blows air into the air inlet pipe 12, then enters the cylinder body 6 through the air inlet 11, fine powder obtained after the grinding of the material is brought into the classifier 5 along with air flow, at the moment, the coarse material drops again and is continuously ground, and qualified fine powder is discharged from the outlet 22 along with air flow; when the grinding gap 19 needs to be adjusted, at this moment, the lifting cylinder 301 is used for lifting the upper cylinder 601, under the action of the guide rail 303 and the sliding block 302, the upper cylinder 601 vertically moves upwards, the upper cylinder 601 and the lower cylinder 602 are separated, at this moment, the locking nuts 18 at the upper end and the lower end of the mounting seat 7 are unscrewed, then, an operator holds the pry bar, the pry bar 23 is inserted into a first space 16f between the upright posts 16e, the pry bar 23 is rotated to drive the driving gear 16a to rotate, so as to drive the driven gear 16b to rotate, the grinding roll shaft 8 movably penetrating through the arc hole 16g moves along the arc hole 16g, so that the grinding gap 19 between the grinding roll 10 and the grinding ring 9 is adjusted, after adjustment, the locking nuts 18 are screwed, at this moment, the grinding gap 19 is completely adjusted, then the lifting cylinder 301 drives the upper cylinder 601 vertically to descend until the upper cylinder 601 is in conflict with the lower cylinder 602, at this moment, and a sealing ring 603 is arranged between the upper cylinder 601 and the lower cylinder 602, the sealing performance between the upper cylinder 601 and the lower cylinder 602 is improved, and the grinding operation can be continued; when the superfine material needs to be ground, the grinding gap 19 is reduced, so that the material layer in the grinding gap 19 is controlled to be thinner, the grinding roller 10 and the grinding ring 9 are not in direct contact, so that the superfine material is ground, meanwhile, the noise is low, and when the grinding roller 10 is used for a long time to cause the grinding roller to be worn, the originally adjusted grinding gap 19 is enlarged, at the moment, the grinding gap 19 can still be readjusted through the adjusting component 16, and the service life is prolonged.

Claims (8)

1. The preparation method of the inorganic filler for preparing the nitrile glove is characterized in that the inorganic filler comprises the following raw material components in parts by weight: 82-93 parts of heavy calcium carbonate fine powder, 3-6 parts of talcum powder, 3-6 parts of gypsum, 0.5-3 parts of surface modifier, 0.5-3 parts of surface activator, 3-8 parts of dispersing agent, 2-4 parts of anti-sedimentation agent and a proper amount of deionized water, wherein the surface modifier is polyoxyethylene-polyoxypropylene copolymer, and the surface activator is alkyl polyoxyethylene ether phosphate;

the preparation method of the inorganic filler for preparing the nitrile glove comprises the following steps:

(I) Preparing heavy calcium carbonate fine powder:

1) Cleaning and screening ores to remove impurities on the surfaces of the ores, wherein the ores are calcite, barite or talcum;

2) Coarse crushing the ore cleaned in the step 1) by a jaw crusher;

3) Feeding the ore subjected to coarse crushing in the step 2) into a vertical crusher through a conveyor for fine crushing;

4) Conveying the ore subjected to fine crushing in the step 3) to a storage bin through bucket lifting, and conveying the ore in the storage bin to a Raymond mill through a conveyor for grinding for 5-8 hours to obtain heavy calcium carbonate fine powder;

(II) weighing 82-93 parts by weight of the heavy calcium carbonate fine powder prepared in the step 4), 3-6 parts by weight of talcum powder, 3-6 parts by weight of gypsum, 0.5-3 parts by weight of surfactant, 3-8 parts by weight of dispersing agent, 2-4 parts by weight of anti-sedimentation agent and a proper amount of deionized water, placing the mixture into a high-speed mixer for stirring and mixing, and stirring and dispersing for 3-10 hours to obtain a mixture A;

(III) continuously heating, stirring and mixing the mixture A obtained in the step (II) in a high-speed mixer, stirring and dispersing for 2-4 hours, and heating at 105-120 ℃ to obtain powder B;

(IV) placing the powder B obtained in the step (III) into a Raymond mill for primary grinding for 5-20 hours to obtain powder C;

(V) weighing 0.5-3 parts of surface modifier and proper amount of deionized water, adding into the powder C prepared in the step (IV), placing into a high-speed mixer, stirring and mixing, and stirring and dispersing for 5-10 hours to obtain a mixture D;

(VI) continuously heating, stirring and mixing the mixture D obtained in the step (V) in a high-speed mixer, stirring and dispersing for 2-3 hours, and heating at 105-120 ℃ to obtain powder E;

(VII) placing the powder E obtained in the step (VI) into a Raymond mill for secondary grinding for 5-10 hours, and grinding into particles with the particle size of less than 1 mu m to obtain the inorganic filler.

2. The method for preparing the inorganic filler for the nitrile glove preparation according to claim 1, wherein the Raymond mill comprises a base, a cylinder is arranged above the base, a classifier is arranged at the top of the cylinder, a classifying rotor of the classifier is positioned at the top of an inner cavity of the cylinder, a feed hopper, a grinding mechanism and a shoveling mechanism are arranged at the lower end of the cylinder, the grinding mechanism comprises a main shaft rotationally connected to the base, the lower end of the main shaft penetrates out of the base and is in power connection with a driving device, the upper end of the main shaft stretches into the inner cavity of the cylinder and is provided with a mounting seat, a plurality of grinding roller shafts are uniformly distributed on the mounting seat, grinding rollers are arranged at the lower end of the grinding roller shafts, and the base is provided with a grinding ring which is matched with the grinding rollers for grinding, and the method is characterized in that: the grinding roller shaft is provided with a fixing component for fixing the grinding roller shaft on the mounting seat, a grinding gap for facilitating material circulation is reserved between the grinding roller and the grinding ring, the main shaft is provided with an adjusting component for adjusting the size of the grinding gap, the adjusting component comprises a plurality of arc holes which are formed in the mounting seat in a central symmetry mode, the center of the mounting seat is provided with a driving gear, the driving gear is connected with a plurality of driven gears in a whole body meshed mode, the mounting seat is located in the center of an arc path of the arc holes and provided with a rotating shaft for installing the driven gears, the grinding roller shaft is movably arranged in the arc holes in a penetrating mode, and the upper end of the grinding roller shaft penetrates out of the arc holes and is provided with a connecting rod fixedly connected with the rotating shaft.

3. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the fixing component comprises lock nuts which are arranged at the upper end and the lower end of the mounting seat, and the lock nuts are in threaded fit connection with the periphery of the grinding roller shaft.

4. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the barrel sets up to split structure, and the barrel is including the last section of thick bamboo that is used for installing the grader, still including the lower section of thick bamboo that is used for installing feeder hopper, grinding mechanism and shovel material mechanism, the lower section of thick bamboo is equipped with the sealing washer that is used for sealing the clearance between section of thick bamboo and the lower section of thick bamboo down, it is equipped with the lifting unit who is used for driving its lift and opens and shuts down the section of thick bamboo to go up the section of thick bamboo, lifting unit is including setting up the lift cylinder on the frame, and the cylinder of lift cylinder is fixed on the frame, and the piston rod of lift cylinder is articulated with last section of thick bamboo, the frame is equipped with the vertical up-down motion's of drive section of thick bamboo guide rail, it is equipped with the slider of slidable mounting on the guide rail to go up the section of thick bamboo.

5. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the upper end of the driving gear is vertically provided with a plurality of upright posts, the upright posts are uniformly distributed on the driving gear, and a first interval is reserved between every two adjacent upright posts.

6. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the shovel material mechanism comprises a turntable which is positioned below the grinding mechanism and fixedly connected to the main shaft, and the turntable is provided with a shovel blade for shoveling materials to the grinding mechanism.

7. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the driving device comprises a driving motor, a driving belt pulley is linked with the driving motor, a driven belt pulley is arranged at the lower end of the main shaft, and a belt which is linked with the driving belt pulley is wound around the periphery of the driving belt pulley and the driven belt pulley.

8. The method for preparing an inorganic filler for nitrile gloves according to claim 2, wherein: the machine seat is positioned below the grinding mechanism and is provided with an air inlet for feeding air into the cylinder, an air inlet pipe is arranged at the position of the air inlet, one end of the air inlet pipe is communicated with the air inlet, the other end of the air inlet pipe is communicated with the blower, and a valve for switching the air inlet is arranged on the air inlet pipe.