WO2020191843A1 - 陶瓷湿法低温制粉工艺 - Google Patents
陶瓷湿法低温制粉工艺 Download PDFInfo
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- WO2020191843A1 WO2020191843A1 PCT/CN2019/083923 CN2019083923W WO2020191843A1 WO 2020191843 A1 WO2020191843 A1 WO 2020191843A1 CN 2019083923 W CN2019083923 W CN 2019083923W WO 2020191843 A1 WO2020191843 A1 WO 2020191843A1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- the invention relates to the technical field of ceramic wet-method powder production, in particular to a ceramic wet-method low-temperature powder production process.
- the ceramic industry is an industry with high energy consumption and high pollution.
- the wet powder process is an important process in the production of ceramic products.
- the traditional wet powder milling process is batching-ball milling-sieving, iron removal-spray drying granulation.
- the process of spray drying and granulation is mainly carried out in the spray drying tower.
- the spray drying tower is the main equipment for heat energy consumption and conversion, and its energy consumption accounts for more than 35% of the total cost of ceramic production.
- the spray drying and granulation process is generally to spray the ceramic slurry with 30%-40% water content into the spray drying tower by a plunger pump pressurized by a spray gun that meets the aperture requirements, and at the same time the high temperature hot air generated by the combustion of a hot air stove (The furnace (800°C ⁇ 1050°C) enters the spray drying tower, and the hot air flowing in the spray drying tower fully contacts the atomized mud droplets, and quickly removes the water in the mud droplets, which is the same as the exhaust gas. And sucked away by the negative pressure induced draft fan, the evaporated mud droplets become ceramic powder particles.
- This dry granulation method has the following problems:
- the hot blast stove that provides the heat source for the spray drying tower, its fuel is mostly coal fuel such as coal water slurry or pulverized coal.
- coal fuel such as coal water slurry or pulverized coal.
- the combustion of the medium fuel will emit a large amount of SOx, NOx, dust and other pollutants. These pollutants are in the ceramic production process.
- post-processing devices are expensive, which increases the production costs of enterprises, and does not meet the national requirements for energy conservation and emission reduction;
- the present invention provides a ceramic wet low temperature powder making process.
- a ceramic wet-method low-temperature powder making process includes the following steps:
- Step 1 Dewatering the mud to obtain mud
- Step 2 Dry the mud under a low temperature state to reach a dry mud mass with a predetermined moisture content
- Step 3 Crush and granulate the dried mud to obtain powder particles with a particle size that meets the requirements.
- the mud is divided into small muds, and the small muds are in the shape of flakes, blocks and/or strips.
- the water content of the massive mud in step 1 is 18%-25%.
- the temperature of the low temperature state in step 2 is between 80°C and 250°C.
- the predetermined moisture content of the dried mud mass in step 2 is 7%-10%.
- the low temperature state is achieved by using the waste heat of the kiln or/and the hot air of a hot air blower.
- the ceramic wet low-temperature powder making process further includes:
- Step 4 Optimize the abrasive particles; put the powder particles obtained in step 3 into an abrasive machine, and polish the surface of the powder particles.
- the small mud material in step 3 is dried in a flat and unfolded state.
- an enhancer is added to the powder particles, and then put into the abrasive machine after mixing.
- the powder particles are screened to separate the finished powders that meet the particle size requirements, and the powder dust with too small particle size is screened out; the powder dust is extruded to form a block.
- the ceramic powder production process of the present invention improves the traditional ceramic powder drying process of ceramic slurry using a spray drying tower.
- the slurry is subjected to dehydration treatment, low temperature drying treatment and Crushing treatment, the obtained dry powder particles have the characteristics of low water content.
- This process does not need to consume too much combustion energy while maintaining the efficiency of ceramic powder making, which greatly reduces the energy consumption of the ceramic production process and improves production efficiency. Effectively reduce pollutants and greatly reduce the production cost of enterprises.
- Figure 1 is a process flow diagram of the present invention
- Figure 2 is a schematic diagram of the high-speed mud cutting equipment
- Figure 3 is a schematic diagram of the structure of the mud cutting mechanism
- Figure 4 is a schematic diagram of the structure of the feed hopper
- Figure 5 is a front view of the ceramic mud drying equipment
- Figure 6 is a left view of the ceramic mud drying equipment
- Figure 7 is a top view of the ceramic mud drying equipment
- Figure 8 is a longitudinal sectional view of the ceramic mud crushing equipment
- Figure 9 is a transverse sectional view of the ceramic mud crushing equipment
- Figure 10 is a schematic diagram of the structure of the crushing mechanism
- Figure 11 is a schematic diagram of the coordination of the breaker and the blade
- Figure 12 is a schematic diagram of the structure of the discharging mechanism
- Figure 13 is a schematic diagram of the structure of the active rolling cage
- Figure 14 is a front view of the abrasive machine
- Figure 15 is a left view of the abrasive machine
- Figure 16 is a schematic diagram of the structure of the extrusion device
- Figure 17 is a schematic diagram of the fit of two squeezing rollers.
- a ceramic wet low-temperature powder milling process includes the steps of batching, ball milling, sieving, iron removal, and slurry tank homogenization in order to obtain a slurry with a water content of 30%-40%.
- the process is the same as the related process of the traditional wet powder milling process.
- the existing equipment and technology can be used for processing.
- several pre-prepared raw materials are mixed according to a certain ratio to obtain the required mixed powder, and then the mixed powder is sent to the ball milling mechanism for ball milling.
- the process of the present invention also includes the following steps of drying the mud:
- Step 1 Dewatering the mud to obtain mud
- Step 2 Dry the mud under a low temperature state to reach a dry mud mass with a predetermined moisture content
- Step 3 Crush the dried sludge into powder particles with a certain particle size.
- the existing dewatering equipment For the mud dewatering in step 1, we can use the existing dewatering equipment.
- the mud obtained from the mud processed by a centrifuge or a vacuum dehydrator has a small volume, and the length of its largest side is less than 5cm. Because of its small volume, we can directly dry these mud; use a filter press to perform the mud
- the bulk mud obtained after the treatment has a large volume, which is not conducive to drying. It is necessary to divide the bulk mud into small mud with a thickness of less than 5cm at the thickest part; the small mud is in the shape of flakes, blocks and/or strips.
- the Jingjin single-chamber feed filter press produced by Jingjin Environmental Protection Co., Ltd. to dewater the mud, and dewater the mud with a water content of 30%-40% to a water content of 18%-25 % Of lumpy mud (filter cake).
- this equipment is used for the treatment of fine gold mines and tailings in the gold industry, it has obvious effects when applied to the ceramic slurry dewatering of this embodiment.
- the obtained filter cake has a uniform thickness, and the filter cake is as large as a rectangular parallelepiped. The length of the sides is about 2m and the thickness is about 4cm.
- the filter cake has a large length, and we need to make a preliminary crushing to obtain a smaller length of mud to facilitate the subsequent production process.
- a high-speed mud cutting device as shown in Figure 2 includes a base 11, a mud cutting bin 12 and a mud cutting mechanism 13.
- the mud cutting bin 12 is cylindrical and is fixedly installed on the base 11; the top of the mud cutting bin 12 A crossbeam 14 is provided, and the mud cutting mechanism 13 is fixedly installed on the crossbeam 14; a feeding hopper 15 is provided above the mud cutting bin 12, and the feeding hopper 15 is fixed to the beam 14, and a mud outlet 16 and a mud outlet 16 are provided below. Installed on the base 11.
- the mud cutting mechanism 13 shown in Figures 2 and 3 includes a rotating shaft 131, a motor 132 and three mud cutters 133.
- the rotating shaft 131 can be rotatably mounted on the cross beam 14, and the motor 132 is fixedly mounted on the cross beam 14 and passed through a pulley
- the group is connected with the rotating shaft 131, and drives the rotating shaft 131 to rotate three mud cutters 133, which are fixedly installed on the rotating shaft 131 from top to bottom along the rotating shaft 131, and the part where the cutter 133 is installed is located in the mud cutter 12 ,
- the rotating shaft 131 is coaxial with the mud cutting bin 12.
- the longitudinal section of the feed hopper 15 is in the shape of a "herringbone", with one inlet 151, two outlets 152, and a sharp dividing blade 153 in the middle.
- the role of the dividing blade 153 is to The filter cake falling into the feeding hopper 15 is divided to make it fall into the mud cutting bin 12 in two directions more evenly, so as to increase the cutting speed of the mud cutter 133 and reduce the volume of the mud after cutting. Smaller.
- each trowel 133 has three blades 1331, and two adjacent trowels 133 are arranged in a staggered manner, that is, the two adjacent blades 1331 are not in the same direction to improve the trowel. 133 cutting efficiency.
- the number of mud cutters 133 and the number of blades 1331 on each mud cutter 133 can be increased or decreased according to the volume of the small mud required after cutting.
- the mud outlet 16 is in the shape of a cone or truncated cone, with a large opening at the top and a small opening at the bottom to facilitate the collection of small mud.
- a bin door 121 is provided in the middle of the mud cutting bin 12, and the bin door 121 is made of transparent acrylic plate.
- the high-speed mud cutting device is equipped with a mud cutting bin 12 and a mud cutting mechanism 13, and a 1 in and 2 out feeding hopper 15 is set on the mud cutting bin 12, and the small mud pieces fall into the feeding hopper 15 and then divided by the feeding hopper 15 Divide into two parts and enter the mud cutting bin 12 from the two exits 152 of the feed inlet respectively.
- the 3 mud cutting knives 133 rotating at a high speed from top to bottom on the mud cutting mechanism 13 gradually divide the small pieces of mud into small pieces that meet the requirements. Mud.
- the small mud block After being cut by the mud cutter 133 for multiple times, the small mud block can be divided into small mud with a particle size of about 1 cm to 3 cm to facilitate the subsequent drying process.
- FIGS 5 to 7 show a ceramic mud drying equipment used in this embodiment, which includes a drying box 21, a conveying device 22, a hot air conveying pipe 23, a moisture exhaust pipe 24, and a moisture exhaust fan 25 ⁇ Circulation fan 26.
- the front part of the drying box 21 is a hot air cavity 211, and the rear part is a drying cavity 212.
- the conveying device 22 includes 5 conveying belts. The front and rear of the conveying belt are respectively provided with a driving wheel and a driven wheel. The driving wheel is fixedly installed on the output shaft of the motor and driven to rotate by the motor.
- Five conveyor belts are arranged in the drying chamber 212 from top to bottom. One end of the conveyor belt is the feeding end and the other end is the blanking end.
- the five conveyor belts are 4 chain mesh belts and 1 conveyor belt.
- the conveyor belt is arranged at the lowest layer; on the drying chamber 212, a baffle plate 2121 is arranged obliquely at the tail of the blanking end of the conveyor belt to ensure that the small mud material completely falls from the blanking end of the upper layer to the next layer On the feed end.
- each stirring rod 29 In order to heat the small mud more evenly, along the conveying direction of the conveyor belt, there are also 3 stirring rods 29 evenly arranged above each chain mesh belt, and each stirring rod 29 is evenly arranged along the circumferential direction. There are multiple strip-shaped stirring pieces, and the stirring rod is driven to rotate by a motor.
- the rotating stirring blade turns the small mud above the chain-type mesh belt, so that the small mud is heated more evenly, and the whole small mud is guaranteed to be heated. Dry evenly.
- the upper and lower parts of the partition plate 213 of the hot air chamber 211 and the drying chamber 212 are evenly provided with a plurality of hot air through holes 2131, and the upper hot air through holes 2131 are located on the uppermost chain mesh belt.
- the hot air through hole 2131 at the bottom is located between the lowest chain mesh belt and the conveyor belt; the upper part of the hot air cavity 211 is evenly provided with a plurality of hot air inlets 2111, and the hot air inlets 2111 are respectively connected to one end of the hot air delivery pipe 23 through.
- the other end of the hot air conveying pipe 23 is respectively connected with the exhaust pipe of the kiln and the air outlet of the hot air blower, and a blower is also arranged in the middle of the hot air conveying pipe 23.
- the kiln waste heat can achieve the low temperature required by the pulverizing process of the present invention, that is, the temperature in the drying box 21 is between 80-250°C, the kiln waste heat is directly used to The small mud is dried to achieve the maximum energy saving effect; when the residual heat of the kiln is insufficient, the hot air blower is started to supplement the hot air to ensure that the drying equipment can work normally.
- the temperature in the drying box 21 can be detected by setting a temperature sensor in the drying box 21, and controlled by controlling the start and stop of the hot air blower. In this technical field, these are commonly used technical means, and the principles are not here. Go ahead.
- a number of circulating fans 26 are evenly arranged in the middle of the top of the drying cavity 212 along the conveying direction of the conveyor belt.
- the circulating fans 26 make the hot air in the hot air cavity 211 circulate in the drying cavity 212.
- the top of the drying cavity 212 is uniformly provided with a number of dehumidifying ports along the conveying direction of the conveyor belt at the end far away from the hot air inlet 2111.
- the length of the drying cavity 212 is about 20m, and there are 9 in total.
- each of the three dehumidification outlets is a group connected through the dehumidification sub-pipe 27, each dehumidification sub-pipe 27 is connected to the general dehumidification pipe 24 through the dehumidification fan 25, and the drying is performed by the dehumidification fan 25 The wet wind in the cavity 212 is sucked away.
- a regulating valve 28 is arranged between the dehumidifying fan 25 and the dehumidifying sub-pipe 27, and the air volume is adjusted through the regulating valve 28, thereby regulating the dehumidifying speed.
- the small mud is evenly sprinkled on the feed end of the chain mesh belt on the uppermost layer of the ceramic mud drying equipment through the swing cloth belt conveyor 6, and the small mud is fed from the feed along the chain mesh belt. Move the end to the blanking end, and then fall from the blanking end to the feeding end of the next layer of chain mesh belt, and reciprocate downwards. Finally, the dried dry mud is transported out of the drying box 21 through the conveyor belt.
- the kiln waste heat and/or the hot air generated by the hot air blower enters the hot air delivery pipe 23 through the air blower, and then passes through the hot air cavity 211 and passes through the upper and lower rows of hot air through holes 2131 of the partition plate 213 under the action of the circulating fan 26 , Circulate up and down in the drying cavity 212 to ensure full contact between the hot air and the small mud.
- the dry hot air gradually takes away the moisture on the small mud and turns into a humid hot air with a lower temperature, which is then exhausted by a dehumidifying fan Into the dehumidification main pipe 24.
- the belt conveyor 6 of the oscillating distributing machine is a commonly used feeding equipment in the drying industry, and its structure can refer to commercial products, and its principle will not be repeated here.
- dehumidification fan 25 and the circulating fan 26 mentioned in the manual are named for the purpose of the fan in this manual for ease of description, and the fans in the commercial products that can achieve the relevant purpose can be used.
- step 2 the small mud is spread out flat by the swing cloth belt conveyor 6, and evenly sprinkled on the chain mesh belt for low-temperature drying treatment, so as to ensure that the small mud is in full contact with the dry hot air and accelerate the drying efficiency.
- the temperature in the drying cavity 212 of this embodiment is between 80 and 250°C. By setting such a temperature, the water in the small mud can be quickly evaporated.
- step three we use ceramic mud crushing and granulating equipment to quickly crush and granulate the dried mud.
- a ceramic mud crushing and granulating equipment as shown in Figures 8 and 9 includes a crushing bin 31, a crushing assembly 32 and a discharging mechanism 33.
- the crushing assembly 32 is arranged in the crushing bin 31, and the discharging mechanism 33 is arranged in the crushing chamber. Below the warehouse 31.
- the crushing assembly 32 includes a rotating shaft 321, a motor A322, 8 crushing mechanisms 323 and two arc-shaped screens 324, each of the four crushing mechanisms 323 corresponds to an arc-shaped screen 324, and the crushing mechanism 323 is roughly uniformly fixed on the rotating shaft 321; the arc-shaped screen 324 is coaxial with the rotating shaft 321, and is fixedly installed directly below the rotating shaft 321, the arc-shaped screen 324 is evenly provided with a number of through holes, the diameter of the through holes is 0.5mm ⁇ 1.5mm. The diameter of the through hole determines the maximum particle size of the powder particles after crushing and granulation. The diameter of the through hole can be set according to the actual needs of production.
- Two ends of the rotating shaft 321 respectively pass through the crushing bin 31, and both ends are rotatably mounted on the crushing bin 31 through bearings.
- One end of the rotating shaft 321 is connected to the motor A322 through a gearbox, and the motor A322 drives the rotating shaft 321 to rotate.
- the crushing mechanism 323 includes two turrets 3231, 12 blades 3232, and 6 breaking hammers 3233; the two turrets 3231 are arranged in a mirror direction, and each turret 3231 is evenly fixed in the circumferential direction. 6 blades 3232; the breaking hammer 3233 is in a long strip shape, and its left and right ends are respectively fixed at the ends of the corresponding left and right blades 3232.
- the number of crushing mechanisms 323 and the number of hammers 3233 on each crushing mechanism 323 can be adjusted according to actual needs.
- the breaking hammer 3233 includes a connecting piece 32331 and a hammer body 32332; as shown in Fig. 11, the end of the blade 3232 is provided with a plurality of anti-skid grooves 32321, and the lower surface of the connecting piece 32331 and the blade 3232 is correspondingly provided with anti-skid strips 323311. , The middle part of the upper top surface is provided with an installation groove for installing the hammer body 32332.
- the hammer body 32332 is in the shape of a rectangular parallelepiped and is made of ceramics. The ceramic has high hardness and high density, which is beneficial to improve the striking effect and service life of the breaking hammer 3233.
- the discharging mechanism 33 includes a discharging belt 331, an active rolling cage 332, a passive rolling cage 333, a motor B334 and a discharging belt frame 335; the active rolling cage 332 and the passive rolling cage 333 can be rotatably arranged on the discharging On the belt frame 335, the motor B334 is connected to the active roller cage 332 and drives the active roller cage 332 to rotate; the discharge belt 331 is sleeved on the active roller cage 332 and the passive roller cage 333.
- the driving roller cage 332 and the driven roller cage have a spinning cone shape.
- the structure of the active rolling cage 332 is the same as that of the passive rolling cage 333 except that one end of the rotating shaft 3321 needs to be connected to the motor B334, which is longer and is provided with a connection structure.
- the following takes the active rolling cage 332 as an example to describe the two structures.
- the active rolling cage 332 includes a rotating shaft 3321, a front mounting plate 3322, a rear mounting plate 3323, a supporting plate 3323 and a number of cage bars 3324; the front mounting plate 3322, the rear mounting plate 3323 and the supporting plate 3323 are cylindrical
- the cross-sectional diameter of the support plate 3323 is larger than that of the front mounting plate 3322 and the rear mounting plate 3323.
- the front mounting plate 3322, the rear mounting plate 3323 and the support plate 3323 are respectively fixed at the front, rear and middle of the rotating shaft 3321.
- cage bars 3324 are evenly distributed along the circumferential direction of the rotating shaft 3321, the front end, rear end and middle of the cage bars 3324 are respectively fixed on the front mounting plate 3322, the rear mounting plate 3323 and the support plate 3323 to form a spindle-shaped cage body.
- the discharging mechanism 33 also includes 9 upper supporting rollers 337 and 3 lower supporting rollers 336.
- the upper supporting rollers 337 are evenly arranged on the discharging belt frame 335, and the upper supporting rollers 337 are in contact with the lower surface of the discharging belt 331.
- the function of the upper supporting roller 337 is to support the discharging belt 331 and prevent the discharging belt 331 from being deformed due to excessive load when conveying powder particles.
- the front and rear sides of the discharging belt 331 are provided with blocking edges 311.
- the dried mud When in use, the dried mud will fall into the crushing chamber 31 of the crushing equipment from the feed inlet above the crushing equipment; in the crushing chamber 31, it will be split and hit by the high-speed rotating breaking hammer 3233, and the dry mud will be crushed. After the large particles are formed and fall on the arc-shaped screen 324, the continuous circumferential rotation of the multiple breakers 3233 will continue to collide with the large particles sinking on the arc-shaped screen 324, driving the large particles on the arc-shaped screen 324.
- the process of the present invention we also optimize the abrasive particles of the above-mentioned powder particles, that is, polish the powder particles to make the surface smoother.
- the purpose of optimizing abrasive particles is to increase the fluidity of the powder, adjust the particle size distribution of the particles and adjust the bulk density of the particles.
- the process of optimizing abrasive grains is realized by using an abrasive machine.
- the abrasive machine includes a mounting seat 41, an abrasive barrel 42 and a motor 43.
- the abrasive barrel 42 is cylindrical, and its opening is inclined upward and is rotatably arranged on the mounting seat 41.
- the center of the outer surface of the abrasive cylinder 42 is provided with a circular groove 421.
- the motor 43 is fixedly installed on the mounting base 41.
- the output shaft of the motor 43 is equipped with a pulley.
- the belt is sleeved on the circular groove 421 and the pulley, and the motor 43
- the abrasive barrel 42 is indirectly driven to rotate.
- the outer surface of the abrasive cylinder 42 is uniformly provided with 4 rolling protrusions 422 along its radial direction.
- Each rolling protrusion 422 is correspondingly provided with a rolling wheel 44.
- the rolling wheel 44 can be rotatably installed on the mounting seat 41 through the rolling wheel. 44 supports the abrasive barrel 42 and reduces the friction between the abrasive barrel 42 and the mounting seat 41 to make it easier to rotate.
- the left and right ends of the abrasive barrel 42 are respectively provided with a limiting protrusion 423, and the function of the limiting protrusion 423 is to prevent the abrasive barrel 42 from moving around.
- the left and right ends of the mounting seat 41 are respectively provided with limit rollers 45 that are matched with the limit protrusions 423.
- the motor 43 drives the abrasive barrel 42 to rotate, and the powder particles located in the abrasive barrel 42 or between the powder particles and the inside of the abrasive barrel 42 will rub against each other, thereby realizing the grinding of the surface of the powder particles. , To achieve optimized abrasive particles.
- the powder particles after the optimized abrasive treatment are then screened by particle size, so as to screen out the powder and dust with too small particle size.
- the powder and dust with a particle size of 0.05 mm to 0.18 mm are screened out.
- the finished powders that meet the particle size requirements are sorted out, and the finished powders are sent to the preset finished product warehouse for storage.
- This embodiment is improved on the basis of the first embodiment.
- One of the differences of the first embodiment is:
- the effect of the reinforcing agent on the surface of the powder particles is to prevent the powder particles from breaking in the subsequent process and to increase the viscosity of the powder particles.
- reinforcing agent We can use various reinforcing agents currently on the market that are used in ceramic bodies.
- the reinforcing agent used is sodium carboxymethyl cellulose.
- This embodiment is further optimized on the basis of the first embodiment and the second embodiment.
- Example 1 we recovered and squeezed the powder dust with too small particle size obtained in Example 1 and Example 2.
- the squeezing is carried out by a squeezing device.
- the squeezing device includes a working chamber 51 and two squeezing rollers 52 arranged in the working chamber 51.
- the two squeezing rollers 52 are parallel and opposite to each other. Both ends of the roller 52 and the squeeze roller 52 are fixedly installed in the working chamber 51 through a bearing seat.
- the output end of the squeezing motor 101 and the input end of the reducer 102 are driven by a transmission belt, the output end of the reducer 102 is driven by a coupling 103, and the coupling 103 is drivingly connected with the end of one of the squeezing rollers 52,
- the ends of the two squeezing rollers 52 on the same side are equipped with transmission gears 123 that are meshing transmission, so that one squeezing roller 52 is driven to rotate through the squeezing motor 101 through the reducer 102 and the coupling 103, and the two The meshing transmission gear 123 drives the other squeezing roller 52 to rotate, and finally realizes the action of the two squeezing rollers 52 rotating toward each other.
- each squeeze roller 52 on the roller surface of each squeeze roller 52 are formed a plurality of squeezing grooves 521 arranged in a ring shape and extending along the axial direction of the squeezing roller 52.
- the pressing grooves 521 correspond to each other to form a pressing cavity 522 when the two pressing rollers 52 rotate toward each other and meet at the tangent of the roller surfaces.
- a blanking hopper 53 is provided above the working bin 51 of this embodiment.
- the powder dust is conveyed from the blanking hopper 53 to the roller surfaces of the two squeezing rollers 52, filling the squeezing groove 521, and as the two squeezing rollers 52 rotate toward each other, a squeeze cavity 522 is formed at the tangent of the roller surfaces to realize the opposite
- the powder dust is extruded to form a block material consistent with the shape of the extrusion cavity 522, and the block material is discharged with the rotation of the two squeezing rollers 52.
- the bulk material is then crushed and granulated through the above-mentioned ceramic mud crushing and granulating equipment, so as to realize the reuse of powder dust.
- the ceramic wet low-temperature powder making process of the present invention can achieve the drying effect of low water content without consuming too much combustion energy, greatly reducing the drying cost, and maintaining the powdering efficiency of ceramic powder.
- the emission of pollutants can be greatly reduced, and the production cost of enterprises can be greatly reduced.
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Abstract
提供一种陶瓷湿法低温制粉工艺,包括:步骤1、泥浆脱水处理,得到泥料;步骤2、在低温状态下对泥料进行烘干,得到预定含水量的干燥泥块;步骤3、将干燥泥块破碎成具有所需粒径的粉料颗粒。该工艺改进了传统陶瓷粉料采用喷雾干燥塔对陶瓷泥浆进行干燥的工艺,有效利用窑炉余热对陶瓷小泥料或陶瓷颗粒进行烘干,降低陶瓷生产过程的能耗,提高生产效益。
Description
本发明涉及陶瓷湿法制粉技术领域,特别是一种陶瓷湿法低温制粉工艺。
陶瓷行业是一个高能耗、高污染的行业。湿法制粉工艺是陶瓷产品生产过程中的重要工艺。
传统的湿法制粉工艺流程是配料-球磨制浆-过筛、除铁-喷雾干燥造粒。其中,喷雾干燥造粒的工序主要在喷雾干燥塔中进行,喷雾干燥塔是热能消耗及转换的主要设备,其能耗占陶瓷生产总成本的35%以上。
喷雾干燥造粒的工序一般是将含水30%~40%的陶瓷泥浆,经柱塞泵加压由符合孔径要求的喷枪雾化喷入喷雾干燥塔,同时经热风炉燃烧产生的高温热空气(炉内800℃~1050℃)进入喷雾干燥塔,在喷雾干燥塔内快速流动的热空气与雾化的泥浆小液滴充分接触,迅速带走泥浆小液滴中的水分,与其中的废气一并被负压引风机抽走,蒸发了水分的泥浆液滴变成陶瓷粉料颗粒。
这种干燥造粒的方式存在以下问题:
1、为喷雾干燥塔提供热源的热风炉,其燃料大多为水煤浆或煤粉等煤燃料,媒燃料燃烧会排出大量的SOx、NOx、粉尘等污染质, 这些污染质是陶瓷生产过程中的主要污染源,虽然当今企业配备后期处理装置以解决此类污染问题,但后期处理装置的购置及运行费用昂贵、增加了企业的生产成本,不符合国家要求的节能减排要求;
2、能耗大,每制备100吨粉料,此干燥方式需要耗费70KG的煤燃料以及综合用电15度,干燥成本非常高。
发明内容
本发明为了解决传统的湿法制粉工艺存在的高能耗、高污染、高成本的问题,而提供的一种陶瓷湿法低温制粉工艺。
为达到上述功能,本发明提供的技术方案是:
一种陶瓷湿法低温制粉工艺,包括以下步骤:
步骤1、泥浆脱水处理,得到泥料;
步骤2、在低温状态下对所述泥料进行烘干,达到预定含水量的干燥泥块;
步骤3、将干燥泥块破碎、造粒得到粒径符合要求的粉料颗粒。
优选地,在烘干前,先把所述泥料分成小泥料,所述小泥料呈片状、块状和/或条状。
优选地,步骤1中所述块状泥料的含水量为18%~25%。
优选地,步骤2中所述低温状态的温度介于80℃~250℃之间。
优选地,步骤2中所述干燥泥块的预定含水量为7%~10%。
优选地,通过利用窑炉余热或/和热风机的热风实现低温状态。
优选地,所述陶瓷湿法低温制粉工艺还包括:
步骤4、优化磨粒;把步骤3所得的粉粒颗粒放入磨料机中,对 所述粉粒颗粒的表面进行打磨。
优选地,步骤3中所述小泥料在平铺展开的状态下进行烘干。优选地,优化磨粒前,先在粉粒颗粒中加入增强剂,混合后再放入磨料机中。
优选地,将所述粉料颗粒进行筛选,分离出符合粒径要求的成品粉料,筛除粒径过小的粉料粉尘;对粉料粉尘进行挤压形成块状料。
本发明的有益效果在于:本发明的陶瓷粉料生产工艺改进了传统陶瓷粉料采用喷雾干燥塔对陶瓷泥浆进行干燥的工艺,在本发明中通过对泥浆料依次经脱水处理、低温干燥处理以及破碎处理,所得到的干燥粉料颗粒具备有低含水量的特点,该工艺在保持陶瓷制粉效率的同时无需耗费过多的燃烧能源,大幅度降低陶瓷生产过程的能耗,提高生产效益,有效地减少污染物以及大幅度降低企业的生产成本。
图1为本发明的工艺流程图;
图2为高速切泥设备的结构示意图;
图3为切泥机构的结构示意图;
图4为进料斗的结构示意图;
图5为陶瓷泥料烘干设备的主视图;
图6为陶瓷泥料烘干设备的左视图;
图7为陶瓷泥料烘干设备的俯视图;
图8为陶瓷泥料破碎设备的纵向剖示图;
图9为陶瓷泥料破碎设备的横向剖示图;
图10为破碎机构的结构示意图;
图11为破碎锤和桨叶的配合示意图;
图12为出料机构的结构示意图;
图13为主动滚笼的结构示意图;
图14为磨料机的主视图;
图15为磨料机的左视图;
图16为挤压装置的结构示意图;
图17为两根挤压辊的配合示意图。
实施例一:
下面结合附图1至附图17对本发明作进一步阐述:
如图1所示的一种陶瓷湿法低温制粉工艺,包括依次经配料、球磨、过筛和除铁、浆池均化的工序,从而得到含水量为30%~40%的泥浆,上述的工序与传统的湿法制粉工艺的相关工序相同,在实践中采用现有的设备和技术进行处理即可。在本实施例中,通过预先备好的若干份原料按照一定配比要求进行混合配料,从而得到所需的混合粉料,再将混合后的混合粉料送入球磨机构中进行球磨处理,以球磨达到预定细度的细粉料,再将细粉料进行过筛和除铁处理,以除去细粉料中的铁屑及杂质物,将除铁过筛后的纯净粉料送入浆池内均化处理从而便得到所需的泥浆。
本发明的工艺还包括以下对泥浆干燥处理的步骤:
步骤1、泥浆脱水处理,得到泥料;
步骤2、在低温状态下对所述泥料进行烘干,达到预定含水量的干燥泥块;
步骤3、将干燥泥块破碎成具有一定粒径的粉料颗粒。
步骤1中的泥浆脱水,我们可以采用现有的脱水设备进行,现有的脱水设备主要有两种类型,一类是采用离心机或真空脱水机进行脱水;另一类是采用压滤机进行脱水。采用离心机或真空脱水机处理的泥浆得到的泥料其体积较小,其最大边的长度小于5cm,由于其体积较小,我们可以直接对这些泥料进行干燥;采用压滤机对泥浆进行处理后得到的块状泥料的体积大,不利于干燥,需要把块状泥料分成最厚处的厚度小于5cm的小泥料;小泥料呈片状、块状和/或条状。
在本实施例中,我们采用景津环保股份有限公司生产的景津单室进料压滤机对泥浆进行脱水,把含水量为30%~40%的泥浆脱水至含水量为18%~25%的块状泥料(滤饼)。该设备虽然是用于黄金行业的精金矿、尾矿处理的,但应用于在本实施例的陶瓷泥浆脱水上效果明显,得到的滤饼厚薄均匀,滤饼大至呈长方体,其最大的边的长度约为2m,厚度约为4cm。滤饼的长度较大,我们需要对其进行初步的破碎得到长度较小的泥料,以方便于后续的生产工序。在本实施例中,为实现自动化生产,我们在压滤机的下方设置传送带,脱水后的滤饼往下掉落到传送带上,并被传送带往外输送,在传送 带末端的外侧,距末端约10cm处,设置有一把旋转的切刀,当滤饼被送出传送带末端,进入切刀的切割范围时,便被切成小块,经初步破碎后,滤饼被分割成边长为5cm~20cm的小泥块。当然,我们也可以采用其它的方法如手工破碎的方式对滤饼进行初步处理。
经上述初步处理后的得到的小泥块,其体积还比较大,我们需采用高速切泥装置对其再进行破碎处理。如图2所示的一种高速切泥装置,包括底座11、切泥仓12和切泥机构13,切泥仓12呈圆筒状,其固定安装在底座11上;切泥仓12上顶部设置有横梁14,切泥机构13固定安装在横梁14上;切泥仓12的上方设置有进料斗15,进料斗15固定在横梁14,下方设置有出泥仓16,出泥仓16安装在底座11上。
如图2和图3所示的切泥机构13包括旋转轴131、电机132和3个切泥刀133,旋转轴131可转动安装在横梁14上,电机132固定安装在横梁14上并通过皮带轮组与旋转轴131连接,带动旋转轴131旋转3个切泥刀133沿着旋转轴131的从上到下固定安装在旋转轴131上,安装有切泥刀133的部分位于切泥仓12中,旋转轴131与切泥仓12同轴。
如图3所示,进料斗15的纵截面呈“人”字形状,设置有1个进口151,2个出口152,中间设有锋利的分料刃153,分料刃153的作用是把落入进料斗15中的滤饼进行分割,使其较均匀地沿两个方向落入切泥仓12中,以提高切泥刀133切泥的速率,并使切割后小泥料的体积较小。
如图3所示,每把切泥刀133具有3片刀片1331,且上下相邻两把切泥刀133错位设置,即上下两把相邻的刀片1331不在同一方向上,以提高切泥刀133的切割效率。另外,切泥刀133的数量和每把切泥刀133上刀片1331的数量可根据切割后所需小泥料的体积的大小进行相应增加或减少。
出泥仓16呈圆锥形或圆台形,其上方开口大下方开口小以方便收集小泥料。为了方便观察切泥机构13的工作状况,切泥仓12的中部设置有仓门121,仓门121采用透明亚克力板制成。
高速切泥装置通过设置切泥仓12和切泥机构13,并在切泥仓12上设置1进2出的进料斗15,小泥块落入进料斗15后被进料斗15分割成两部分并分别从进料口的两个出口152进入切泥仓12中,切泥机构13上从上到下高速旋转的3把切泥刀133逐渐把小泥块分割成大小符合要求小泥料。
小泥块经切泥刀133多次切割后,可分割成粒径约为1cm~3cm的小泥料,以方便于后续的干燥工艺。
图5至附图7所示的是本实施例采用的一种陶瓷泥料烘干设备,它包括干燥箱体21、输送装置22、热风输送管道23、排湿总管道24、排湿风机25和循环风机26。
干燥箱体21的前部为热风腔体211,后部为干燥腔体212。输送装置22包括5条输送带,输送带的前部和后部分别设置有主动轮和从动轮,主动轮固定安装在电机的输出轴上并由电机驱动转动。5条输送带从上到下依次设置在干燥腔体212内,输送带的一端为进 料端,另一端为落料端,5条输送带为4条链条式网带和1条输送皮带,其中输送皮带设置在最下层;在干燥腔体212上,输送带的落料端的尾部倾斜设置有挡料板2121,从而保证小泥料从上一层的落料端完全掉落至下一层的进料端上。
为使小泥料更均匀地受热,沿着输送带的输送方向,每条链条式网带的上方还均匀设置有3根搅料棒29,每根搅料棒29上沿着圆周方向均匀设置有多片条状搅料片,搅料棒由电机驱动旋转。小泥料沿着链条式网带被输送到搅料棒29下方时,旋转的搅料片翻动链条式网带上方的小泥料,从而使小泥料受热更均匀,保证小泥料整体被均匀干燥。
沿着输送带的输送方向,热风腔体211与干燥腔体212的分隔板213的上部和下部分别均匀开设有多个热风通孔2131,上部的热风通孔2131位于最上层链条式网带的上方,下部的热风通孔2131位于最下层的链条式网带和输送皮带之间;热风腔体211的上部均匀开设有多个热风进口2111,热风进口2111分别与热风输送管道23的一端相连通。热风输送管道23的另一端分别与窑炉的排气管和热风机的出风口相连通,热风输送管道23的中部还设置有鼓风机。在实际使用的过程中,当窑炉余热能实现本发明的制粉工艺所需的低温状态时,即干燥箱体21内的温度介于80~250℃之间,则直接利用窑炉余热对小泥料进行干燥,从而达到最大的节能效果;当窑炉余热不足时,则启动热风机进行热风补充,以保证烘干设备能正常工作。干燥箱体21内的温度可通过在干燥箱体21内设置温度传 感器来进行检测,并通过控制热风机的启停来控制,在本技术领域,这些是常用的技术手段,在此不对其原理进行赘述。
干燥腔体212的顶部的中间沿着输送带的输送方向均匀设置有若干个循环风机26,通过循环风机26使热风腔体211内的热风在干燥腔体212内循环流动。干燥腔体212的顶部在远离热风进口2111的一端沿着输送带的输送方向均匀设置有若干个抽湿口,在本实施例中,干燥腔体212的长度约为20m,共设有9个抽湿口,每3个抽湿口为一组通过抽湿分管道27连接,每一抽湿分管道27再分别通过排湿风机25与排湿总管道24连通,通过排湿风机25把干燥腔体212内的湿风抽走。排湿风机25和抽湿分管道27之间设置有调节阀28,通过调节阀28调节出风量,从而调节抽湿速度。
在本实施例中,小泥料通过摆动布料皮带机6均匀地洒落在陶瓷泥料烘干设备最上层的链条式网带的进料端上,小泥料沿着链条式网带从进料端移至落料端,再从落料端下落至下一层链条式网带的进料端上,如此往复向下,最终干燥后的干燥泥块通过输送皮带输送出干燥箱体21,在这个过程中窑炉余热和/热风机产生的热风通过鼓风机进入热风输送管道23内,再经热风腔体211并通过分隔板213上、下两排热风通孔2131在循环风机26的作用下,在干燥腔体212内上下循环,从而保证热风与小泥料的充分接触,干燥的热风逐渐带走小泥料上的水分后,变成温度较低的湿热风,再经抽湿风机排入排湿总管道24。小泥料经过干燥箱体21烘干后,其含水最降为7%~10%,并通过输送皮带输送出干燥箱体21外。摆动布料机皮带 机6是干燥行业常用的上料设备,其结构参考市贩品即可,在此不对其原理进行赘述。
需要说明的是在说明书中所说的排湿风机25、循环风机26是为了便于描述,按风机在本说明书中的用途命名的,使用时采用市贩品中能实现相关用途的风机即可。
在步骤二中,通过摆动布料皮带机6把小泥料平铺展开,均匀洒在链条式网带上进行低温干燥处理,从而保证小泥料与干燥热风充分接触,加快干燥的效率。其次,本实施例的干燥腔体212内的温度介于80~250℃之间,通过设置这样的温度从而使小泥料中水分能够迅速的蒸发。
在步骤三中,我们通过陶瓷泥料破碎造粒设备对干燥泥块进行快速破碎和造粒。
如图8和图9所示的一种陶瓷泥料破碎造粒设备,包括破碎仓31、破碎组件32和出料机构33,破碎组件32设置在破碎仓31中,出料机构33设置在破碎仓31的下方。
破碎组件32包括转动轴321、电机A322、8个破碎机构323和2个圆弧形筛网324,每4个破碎机构323对应一个圆弧形筛网324,破碎机构323大致均匀固定在转动轴321上;圆弧形筛网324与转动轴321同轴,且固定安装在转动轴321的正下方,圆弧形筛网324上均匀开设有若干个通孔,通孔的直径为0.5mm~1.5mm。通孔的直径决定破碎和造粒后粉料颗粒的最大粒径,通孔的直径的大小可根据生产的实际需要进行设置。转动轴321的两端分别从破碎仓31中 穿出,且两端通过轴承可转动安装在破碎仓31上,其中一端与电机A322通过变速箱相连接,电机A322驱动转动轴321旋转。
如图10所示,破碎机构323包括2个转动架3231、12片桨叶3232和6根破碎锤3233;2个转动架3231左右镜向设置,每个转动架3231的圆周方向上均匀固定有6片桨叶3232;破碎锤3233呈长条状,其左右两端分别固定在相对应的左右两片桨叶3232的末端部。当然在实际使用的过程中,破碎机构323的数量以及每个破碎机构323上破碎锤3233的数量可以根据实际的需要进行调整。破碎锤3233的最末端与圆弧形筛网324之间具有一定的间隙,我们把该间隙称为摩擦间隙,在本实施例中,该摩擦间隙约为1mm。
破碎锤3233包括连接件32331和锤体32332;如图11所示,桨叶3232的末端开设有多条防滑槽32321,连接件32331与桨叶3232配合固定的下表面上对应设置有防滑条323311,上顶面的中部开设有用于安装锤体32332的安装槽。在本实施例中,锤体32332呈长方体状,采用陶瓷制成,陶瓷的硬度高、密度大从而有利于提高破碎锤3233的击打效果和使用寿命。
如图12所示,出料机构33包括出料带331、主动滚笼332、被动滚笼333、电机B334和出料带架335;主动滚笼332和被动滚笼333可转动设置在出料带架335上,电机B334与主动滚笼332连接并驱动主动滚笼332旋转;出料带331套设在主动滚笼332和被动滚笼333上。
在本实施例中,主动滚笼332和从动滚笼呈纺锥形。主动滚笼 332的结构除了旋转轴3321的一端由于需与电机B334连接而较长且设置有连接结构外,其它部分和被动滚笼333的结构相同。下面以主动滚笼332为例,对这两者的结构进行说明。
如图13所示,主动滚笼332包括旋转轴3321、前安装板3322、后安装板3323、支撑板3323和若干根笼条3324;前安装板3322、后安装板3323和支撑板3323呈圆柱形且支撑板3323的横截面的直径比前安装板3322和后安装板3323的要大,前安装板3322、后安装板3323和支撑板3323分别固定在旋转轴3321的前端、后端和中部;若干根笼条3324沿着旋转轴3321的圆周方向均匀分布,笼条3324的前端、后端和中部分别固定在前安装板3322、后安装板3323和支撑板3323上,从而形成纺锤形笼体。
出料机构33还包括9根上托辊337和3根下托辊336,上托辊337均匀设置在出料带架335上,上托辊337与所述出料带331的下表面相接触。上托辊337的作用是对出料带331进行支撑,防止出料带331在输送粉料颗粒时因过度负重而变形。另外,为防止出料带331在送料的过程中,粉粒颗粒从出料带331的前后两侧洒落,出料带331的前后两侧设置有挡沿311。
在使用时,干燥后的干燥泥料从破碎设备上方的进料口掉入破碎设备的破碎仓31中;在破碎仓31内被高速旋转的破碎锤3233割裂、撞击,干燥泥料被击碎后形成大颗粒落入圆弧形筛网324上,多个破碎锤3233持续的圆周转动会与下沉在圆弧形筛网324上的大颗粒持续碰撞,带动大颗粒在圆弧形筛网324上方循环抛洒,从而 将大颗粒逐步碰撞破碎成小粒径的小颗粒;另外,当破碎锤3233转动至圆弧形筛网324上方时,利用破碎锤3233的转动挤压将圆弧形筛网324上的小粒径的小颗粒挤压至破碎锤3233和圆弧形筛网324的摩擦间隙中,使被挤压至摩擦间隙内的小颗粒摩擦圆弧形筛网324上的通孔,从而把小颗粒摩擦形成超小粒径的粉粒颗粒,通过上述的破碎和摩擦造粒,最终该符合粒径要求的粉料颗粒透过圆弧形筛网324上的通孔,落到出料带331上被运出。
在本发明的工艺中,我们还对上述的粉料颗粒进行优化磨粒,即对粉料颗粒进行打磨,使其表面更加光滑。优化磨粒的目的是增加粉料的流动性、调整粒子的颗粒级配以及调整粒子的容重。在本实施例中,优化磨粒的工序是采用磨料机来实现的。
如图14和图15所示,磨料机包括安装座41、磨料筒42和电机43。磨料筒42呈圆柱状,其开口朝上倾斜可转动设置在安装座41上。磨料筒42的外表面的中部开设有圆形槽421,电机43固定安装在安装座41上,电机43的输出轴上安装有皮带轮,皮带套设在圆形槽421和皮带轮上,通过电机43间接驱动磨料筒42转动。
磨料筒42的外表面沿着其径向方向均匀设置有4条滚动凸条422,每条滚动凸条422对应设置有滚动轮44,滚动轮44可转动安装在安装座41上,通过滚动轮44对磨料筒42进行支撑,同时降低磨料筒42与安装座41之间的摩擦力,使其更易于转动。
磨料筒42的左右两端还分别设置有限位凸条423,限位凸条423的作用是防止磨料筒42左右窜动。安装座41的左右端分别设置有 与限位凸条423相配合的限位滚轮45。
粉料颗粒放入磨料筒42后,电机43驱动磨料筒42转动,位于磨料筒42内的粉料颗粒间或粉料颗粒与磨料筒42的内部会相互摩擦,从而实现对粉料颗粒表面的打磨,实现优化磨粒。
上述优化磨料处理后的粉料颗粒再经粒径筛选的工序,从而筛除粒径过小的粉粒粉尘,在本实施例中,筛除粒径0.05mm~0.18mm的粉粒粉尘,分理出符合粒径要求的成品粉料,并将成品粉料送入预设有的成品仓中进行存储备用。
实施例二:
本实施例是在实施例一的基础改进的,其一实施例一不同的地方在于:
在使用磨料机对粉料颗粒进行打磨前,我们在粉粒颗粒中加入增强剂,再把混合后的粉粒颗粒通过磨料机进行磨料。从而使优化磨料处理后的粉粒颗粒表面粘上增强剂。
粉料颗粒表面粘上增强剂的作用是防止粉料颗粒在后续的工序中碎裂,以及提高粉料颗粒的粘度。
增强剂我们可以采用目前市贩品的各种运用于陶瓷坯体的增强剂,在本实施例中,所采用的增强剂为羧甲基纤维素钠。
实施例三:
本实施例是在实施例一和实施例二的基础上,进一步优化。
在本实施例中,我们对实施例一和实施例二中得到的粒径过小的粉料粉尘进行回收、挤压。
挤压通过挤压装置进行,如图16所示,挤压装置包括有工作仓51和设于工作仓51内的两根挤压辊52,两根挤压辊52平行且相向转动的挤压辊52,挤压辊52两端均是通过轴承座固定安装于工作仓51内。挤压电机101的输出端与减速器102输入端通过传动皮带相传动,减速器102输出端与联轴器103相传动,联轴器103与其中一根挤压辊52端部相传动连接,两根挤压辊52同侧的端部均设置有相啮合传动的传动齿轮123,从而通过挤压电机101经减速器102和联轴器103带动一根挤压辊52进行转动,并且利用两个啮合的传动齿轮123带动另一根挤压辊52进行转动,最终实现两根挤压辊52相向转动的动作。如图17所示,在每根挤压辊52辊面上均成型有多条呈环形布置且沿挤压辊52轴向延伸的挤压槽521,两根挤压辊52辊面上的挤压槽521一一对应以随两根挤压辊52相向转动在辊面相切处相汇形成挤压腔522。本实施例的工作仓51上方设置有落料斗53。粉料粉尘从落料斗53输送至两根挤压辊52辊面处,填充满挤压槽521,随着两根挤压辊52相向转动,从而在辊面相切处形成挤压腔522实现对粉料粉尘挤压成型,进而得到与挤压腔522形状相一致的块状料,块状料随两根挤压辊52的转动动作排出。
块状料再通过上述的陶瓷泥料破碎造粒设备进行破碎和造粒工序,从而实现粉料粉尘的再利用。
本发明的陶瓷湿法低温制粉工艺,无需耗费过多的燃烧能源便可达到低含水量的干燥效果,大大地降低干燥的成本,同时保持了 陶瓷粉料的制粉效率。另外,由于燃烧能源使用的减少,可大大减少污染物的排放,大幅度降低企业生产成本。
Claims (10)
- 一种陶瓷湿法低温制粉工艺,其特征在于:包括以下步骤:步骤1、泥浆脱水处理,得到泥料;步骤2、在低温状态下对所述泥料进行烘干,达到预定含水量的干燥泥块;步骤3、将干燥泥块破碎、造粒得到粒径符合要求的粉料颗粒。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:在烘干前,先把所述泥料分成小泥料,所述小泥料呈片状、块状和/或条状。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:步骤1中所述块状泥料的含水量为18%~25%。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:步骤2中所述低温状态的温度介于80℃~250℃之间。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:步骤2中所述干燥泥块的预定含水量为7%~10%。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:通过利用窑炉余热或/和热风机的热风实现低温状态。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:所述陶瓷湿法低温制粉工艺还包括:步骤4、优化磨粒;把步骤3所得的粉粒颗粒放入磨料机中,对所述粉粒颗粒的表面进行打磨。
- 如权利要求1所述的陶瓷湿法低温制粉工艺,其特征在于:步骤3中所述小泥料在平铺展开的状态下进行烘干。
- 如权利要求7所述的陶瓷湿法低温制粉工艺,其特征在于:优化磨粒前,先在粉粒颗粒中加入增强剂,混合后再放入磨料机中。
- 如权利要求7或9所述的陶瓷湿法低温制粉工艺,其特征在于:将所述粉料颗粒进行筛选,分离出符合粒径要求的成品粉料,筛除粒径过小的粉料粉尘;对粉料粉尘进行挤压形成块状料。
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