CN104230192A - Method and device for producing alpha-type gypsum in large scale with low cost - Google Patents
Method and device for producing alpha-type gypsum in large scale with low cost Download PDFInfo
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- CN104230192A CN104230192A CN201410471095.5A CN201410471095A CN104230192A CN 104230192 A CN104230192 A CN 104230192A CN 201410471095 A CN201410471095 A CN 201410471095A CN 104230192 A CN104230192 A CN 104230192A
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Abstract
The invention discloses method and device for producing alpha-type gypsum in a large scale with a low cost. The method comprises the following steps: spraying a proper amount of water into gypsum powder which comprises 10-15% of attached water and 15-20% of crystal water and has the grade of calcium sulphate dehydrate being 90-95% and preparing into dihydrate gypsum pellets; then, putting the dihydrate gypsum pellets in a rotary kiln body of a special rotary calcining kiln for alpha-type gypsum and sealing; heating the rotary kiln body by using a heating electric furnace body to evaporate the attached water and crystal water out of the dihydrate gypsum pellets in the rotary kiln body so as to form water vapor with pressure of 0.5-0.8MPa and temperature of 150-180 DEG C inside the sealed rotary kiln body; holding the temperature and pressure for 10-20 minutes under the condition so as to convert the dihydrate gypsum pellets in the rotary kiln body into alpha hemihydrate gypsum; then, switching on a decompression valve to relieve pressure and switching off the switch of the heating electric furnace body; and drying the residual water in alpha hemihydrate gypsum by using waste heat of the kiln body, and discharging and refining into 100-150 meshes powder to obtain a finished product alpha-type gypsum. The method provided by the invention is simple in process, convenient and efficient to operate, small in equipment investment and low in production cost, can be used for producing alpha-type gypsum in large scale, and is worthy widely popularizing.
Description
Technical field
The present invention relates to industrialized preparing process and the device, particularly a kind of low cost of α type gypsum, the method for scale operation α type gypsum and device.
Background technology
Alpha semi-hydrated gypsum (also known as α gypsum) is because its xln is fine and close short cylinder crystal, specific volume is little, water paste ratio is little, after gelling, the performance of the high excellence of intensity is widely used in various fields and enjoys the concern of numerous scholars, but due to the complex manufacturing of α gypsum, facility investment is large, production cost is high, price is high, its usage quantity is very limited, at present both at home and abroad all the novel process of research and development for the production of α type gypsum, significantly reduce the great brainstorm subject that its production cost is classified as gypsum industry.
The method of the current α of preparation type gypsum mainly adopts " autoclave method " and " hydrothermal method ", but by the restriction of processing method, the production of current α type gypsum also rests on conceptual phase, and just bench-scale testing product, is not really applied in scale operation and goes.It is adopt autoclave that current use " autoclave method " prepares α type gypsum, in gypsum raw material, after additional crystal modifier, raw material is put into autoclave, the water vapour passing into High Temperature High Pressure again in autoclave carries out steam pressure, dihydrate gypsum is made to produce α crystallization, again gypsum raw material is taken out, attached water and crystal water are removed in rapid drying, prepare α gypsum, there is following drawback in this kind of method: needs external boiler to fire steam in (1) preparation process, vapor temperature and pressure are subject to the restriction of Boiler Material Transformation, pressure can not be very high, temperature is also limited, and the firing time of α gypsum and the pressure and temperature passing into steam are proportionate, so just cause the α gypsum firing time long, energy expenditure is large, (2) gypsum raw material in autoclave is static stacking, is utilizing in Boiler Steam sintering procedure, and the bed of material is unsuitable blocked up, and production capacity is very low, can only maintain bench-scale testing, can not scale operation, (3) gypsum raw material after turning brilliant success also needs material to take out in dryer, remove unnecessary attached water and crystal water, remove attached water not in time, α gypsum easily gets damp again and becomes dihydrate gypsum, and drying time is long, α gypsum easily becomes dehydrated gyp-, and quality is unstable, (4) at least need three main equipments could organize production, not only waste a large amount of places resource, management is not also concentrated, and human and material resources consume huge, and production cost is high.Therefore, this kind of method is not suitable for carrying out large-scale production and application.
It is directly be placed in water by gypsum raw material that current use " hydrothermal method " prepares α gypsum, add crystal modifier post-heating and carry out infusion, make dihydrate gypsum in water, produce α crystallization, more after filtering α gypsum material is taken out, attached water and crystal water are removed in rapid drying, prepare α gypsum, it is long equally to there is preparation time in this kind of method, and energy consumption is high, and production capacity is low, problem with high costs, is also not suitable for large-scale production and application.Therefore, research and develop a kind of processing method simple, simple operation, the α gypsum new process of production that production cost is low and device become gypsum industry problem demanding prompt solution.
Summary of the invention
Object of the present invention is exactly the complicated process of preparation for current α type gypsum, and facility investment is large, and production cost is high, production capacity is low, can not scale operation, the problem of the application of restriction α type gypsum, provides method and the device of a kind of low cost, scale operation α type gypsum.
The method of a kind of low cost of the present invention, scale operation α type gypsum, carry out in the steps below:
(1) choose containing attached water 10 ~ 15%, crystal water 15 ~ 20%, terra alba grade is the terra alba of 90 ~ 95%, sprays into the water of terra alba total mass 5 ~ 7%, adopts nodulizer to make the dihydrate gypsum pelletizing of 5 ~ 10mm, for subsequent use;
(2) feeding gate of α type gypsum Special rotating calcining kiln is opened, starter motor makes rotary kiln body reverse, rotating speed 5 ~ 10r/min, open the switch of hot plate body, the Heating temperature of setting electric furnace body is 800 ~ 1000 DEG C, when rotary kiln temperature rises to 450 ~ 550 DEG C simultaneously, the dihydrate gypsum pelletizing prepared in step (1) is added in rotary kiln body, feeding quantity is 30 ~ 40% of rotary kiln body cumulative volume, after reinforced, closes and good seal feeding gate;
After (3) 5 ~ 10 minutes, detect vapor pressure in rotary kiln body and rise to 0.5 ~ 0.8Mpa, after temperature of charge rises to 150 ~ 180 DEG C, heat-insulation pressure keeping 10 ~ 20 minutes, open pressure release valve, rotary kiln body internal pressure is made to be down to 0.11 ~ 0.13Mpa, close hot plate body switch, open discharge door, waste heat is utilized to continue parch material 5 ~ 10 minutes, operating electrical machines makes rotary kiln body rotate forward, under the effect of spiral charging guide plate, material is transported to refining mill fine grinding to 100 ~ 150 orders after the discharge port of rotary kiln body draws off, the α type that gets product gypsum, after testing, 6 ~ 10 minutes α type gypsum presetting periods of the present invention, final setting time 20 ~ 30 minutes, standard consistency is 34 ~ 38%, 2h folding strength > 10.0Mpa, dry ultimate compression strength > 40.0Mpa, reach the requirement of strength of α 40 gypsum in JC/T 2038-2010 standard,
Described α type gypsum Special rotating calcining kiln, there is supporting seat, be provided with body of heater supporting seat is added, described body of heater is olive shape hot plate body, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, respectively at both ends open place be fasteningly provided with a sealing-ring, an olive shape rotary kiln body is provided with in hot plate body internal cavity, one end of described rotary kiln body is provided with opening for feed, the other end is provided with discharge port, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body two ends section of stretching out each fixing sleeve, a wheel rim is housed, two support rollers are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port one end is provided with a master wheel by screw is also fastening, below master wheel, between two support rollers, engagement is fitted with a pinion(gear), described pinion(gear) is by drive-motor and a step-down gear driven rotary, be equipped with sealing gland in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate, the sealing gland of opening for feed one end is also provided with pressure release valve, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body is also provided with temperature probe and load cell.
The inventive method is under the condition without additional crystal modifier, the αsemiwatergypsum of the requirement of strength reaching α 40 gypsum in JC/T 2038-2010 standard can be prepared, but we also can according to customer demand, when preparing dihydrate gypsum pelletizing with gypsum raw material in above-mentioned preparation method, crystal modifier suitable is in right amount added, to reach the α type gypsum of the performance index met the requirements of the customers in water; Described crystal modifier is generally inorganic salt, Organic Sodium Salt, sylvite, ammonium salt; as Tai-Ace S 150, potassium aluminium sulfate, Trisodium Citrate etc.; according to the requirement of client to α type gypsum product performance during use; select suitable crystal modifier; the consumption of crystal modifier during α type gypsum is prepared in reference prior art; after being mixed with the aqueous solution of gypsum raw material gross weight 5%-7%, being sprayed directly on and gypsum raw material mixes rear employing nodulizer thoroughly making dihydrate gypsum pelletizing.
A kind of low cost of the present invention, the device that the method for scale operation α type gypsum is used, there is supporting seat, be provided with body of heater supporting seat is added, described body of heater is olive shape hot plate body, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, respectively at both ends open place be fasteningly provided with a sealing-ring, an olive shape rotary kiln body is provided with in hot plate body internal cavity, one end of described rotary kiln body is provided with opening for feed, the other end is provided with discharge port, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body two ends section of stretching out each fixing sleeve, a wheel rim is housed, two support rollers are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port one end is provided with a master wheel by screw is also fastening, engage with master wheel between two support rollers below master wheel and be fitted with a pinion(gear), described pinion(gear) is by drive-motor and a step-down gear driven rotary, be equipped with sealing gland in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate, the sealing gland of opening for feed one end is also provided with pressure release valve, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body is also provided with temperature probe and load cell.
Between the diad at described two support rollers and wheel rim point of contact place, angle is 60 °.
The block number of described spiral charging guide plate is 1-4 block.
The inventive method is that contriver makes after carrying out bulk trial at the crystallization condition having studied intensively α type gypsum, its principle in gypsum raw material, sprays into amount of water and raw material is prepared into dihydrate gypsum pelletizing, again dihydrate gypsum pelletizing is put into the rotary calcining kiln of sealing, rotary calcining kiln is heated, attached water in gypsum raw material and crystal water are evaporated, high temperature is formed in enclosed space, through contriver, the crystallization condition of high pressure (carries out finding after lot of experiments that the turn brilliant time and vapor pressure and vapor temperature of α gypsum are proportionate, and under condition of the present invention, turning the brilliant time only needs 10-20 minute), dihydrate gypsum is impelled to produce α crystallization at short notice, then the waste heat of rotary calciner is utilized to be evaporated by moisture unnecessary in α gypsum, namely the preparation process of α gypsum is completed, after having prepared, only need the α gypsum made to be delivered to refining mill fine grinding to 100-150 order, obtain qualified finished product gypsum, technique is simple, easy to operate, greatly reduce the production cost of α gypsum.
Apparatus of the present invention are for realizing the inventive method and custom-designed, when utilizing apparatus of the present invention to produce α gypsum, raw material is put into the rotary kiln body of apparatus of the present invention, entering of good seal rotary kiln body two ends, discharge port, dihydrate gypsum raw material is stirred along with the rotation of rotary kiln body, material so not only can be made constantly to stir in rotary kiln body, be heated evenly, the α crystallization conversion in material can also be made more thorough, simultaneously because apparatus of the present invention are become one at heating unit and reaction unit, achieve the autoclave in traditional autoclave method production technique, boiler, the function of dryer three equipment, not only greatly save space, place and managerial personnel's cost, also add material treatment capacity, greatly reduce the production cost of α gypsum, the industrialization scale operation of α gypsum is achieved.
Hinge structure of the present invention, its advantage is:
(1) preparation technology is simple: without the need to external boiler and drying plant, only utilize special purpose device of the present invention, the moisture that raw material itself contains is evaporated and can forms the steam ambient of High Temperature High Pressure, reach the crystallization condition of α gypsum, greatly reduce the energy consumption in production, facility investment and human cost;
(2) material treatment capacity is large: the rotary kiln utilizing sealing, material can constantly be stirred in reaction process, add the contact area of material and high-temperature high-pressure steam, solve the problem that in the production of traditional autoclave method, the bed of material is unsuitable blocked up, improve equipment capacity;
(3) expend time in short: because the present invention adopts to be evaporated by the moisture that raw material itself contains under air-proof condition formation high-temperature and high-pressure conditions, so can within the scope of equipment ability to bear, vapor pressure is risen in 0.5-0.8Mpa(prior art and limit by Boiler Material Transformation, made vapor pressure is generally 0.25-0.35 Mpa), vapor temperature rises to 150-180 DEG C, therefore, crystal conversion only needs to complete for 10-20 minute, whole process only needs 30-50 minute can complete firing of α gypsum, is beneficial to scale operation;
(4) design production equipment special, make concise production process, Operating processes specifications, convenient tissue of going into operation is produced, and greatly reduces the production cost of α gypsum.
The inventive method technique is simple, easy to operate, apparatus of the present invention are simple for structure, and facility investment is few, and the inventive method and device solve complex process when producing α type gypsum at present, facility investment is large, production cost is high, and production capacity is low, can not scale operation, the problem of the application of restriction α type gypsum, is applicable to wide popularization and application.
Accompanying drawing explanation
Fig. 1 is that the master of apparatus of the present invention cuts open structural representation;
Fig. 2 is A-A direction structure schematic diagram in Fig. 1;
Fig. 3 is B-B direction structure schematic diagram in Fig. 2.
In figure: 1-locking plate, 2-sealing gland, 3-hot plate body, 4-rotary kiln body, 5-spiral charging guide plate, 6-master wheel, 7-wheel rim, 8-support roller, 9-pinion(gear), 10-supporting seat, 11-drive-motor, 12-step-down gear, 13-opening for feed, 14-discharge port, 15-pressure release valve, 16-sealing-ring, 17-temperature probe, 18-load cell.
Embodiment
Embodiment 1
See Fig. 1, a kind of low cost of the present embodiment, the method for scale operation α type gypsum, carry out in the steps below:
(1) choose containing attached water 15%, crystal water 19%, terra alba grade is the terra alba of 93%, sprays into terra alba total mass 5% water, adopts nodulizer to make the dihydrate gypsum pelletizing of 8 ~ 10mm, for subsequent use;
(2) feeding gate 13 of α type gypsum Special rotating calcining kiln is opened, starting drive-motor 11 makes rotary kiln body 4 reverse, rotating speed is 7r/min, open the switch of hot plate body 3, the Heating temperature of setting electric furnace body is 900 DEG C, when rotary kiln temperature rises to 450 ~ 550 DEG C simultaneously, the dihydrate gypsum pelletizing prepared in step (1) is added in rotary kiln body, feeding quantity is 30% of rotary kiln body cumulative volume, after reinforced, closes and good seal feeding gate; Described rotary kiln body reversion, refer to that the sense of rotation of rotary kiln body is contrary with the hand of spiral of rotary kiln body internal helicoid charging guide plate, like this by rotating, the spiral charging guide plate in kiln body can be made to play lifting effect, and stop material to be got rid of to discharge port along the sense of rotation of rotary kiln body, material is remained in the middle of kiln body react, lower same;
After (3) 5 ~ 7 minutes, detect vapor pressure in rotary kiln body and rise to 0.65Mpa, when temperature of charge rises to 160 ~ 170 DEG C, heat-insulation pressure keeping 10 minutes, open pressure release valve, rotary kiln body internal pressure is made to be down to 0.11Mpa, close hot plate body switch, open discharge door, waste heat is utilized to continue parch material 8 minutes, operating electrical machines makes rotary kiln body rotate forward, under the effect of spiral charging guide plate, material is transported to refining mill fine grinding to 100 ~ 150 orders after the discharge port of rotary kiln body draws off, the α type that gets product gypsum, after testing, 7 ~ 9 minutes α type gypsum presetting periods that the present embodiment is obtained, final setting time 25 ~ 30 minutes, standard consistency is 34 ~ 36%, 2h folding strength > 10.0Mpa, dry ultimate compression strength > 40.0Mpa, reach the requirement of strength of α 40 gypsum in JC/T 2038-2010 standard, described rotary kiln body rotates forward, and refer to that the sense of rotation of rotary kiln body is identical with the hand of spiral of kiln body internal screw charging guide plate, such material can discharging smoothly under the turning effort of rotary kiln body and the effect of spiral charging guide plate.
Described α type gypsum Special rotating calcining kiln, there is supporting seat 10, be provided with body of heater supporting seat is added, described body of heater is olive shape hot plate body 3, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, an olive shape rotary kiln body 4 is provided with in hot plate body 3 internal cavity, one end of described rotary kiln body is provided with opening for feed 13, the other end is provided with discharge port 14, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body 4 two ends section of stretching out each fixing sleeve, a wheel rim 7 is housed, two support rollers 8 are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port 14 one end is provided with a master wheel 6 by screw is also fastening, below master wheel, between two support rollers, engagement is fitted with a pinion(gear) 9, described pinion(gear) is by drive-motor 11 and step-down gear 12 driven rotary, be equipped with sealing gland 2 in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate 1, the sealing gland of opening for feed one end is also provided with pressure release valve 15, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates 5, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body 4 is also provided with temperature probe and load cell.
Between described two support rollers 8 and the diad at wheel rim 7 point of contact place, angle is 60 °.
The block number of described spiral charging guide plate 5 is 1-4 block, is specially 4 pieces in the present embodiment.
Embodiment 2
The method of a kind of low cost of the present invention, scale operation α type gypsum, carry out in the steps below:
(1) choose containing attached water 10%, crystal water 20%, terra alba grade is the terra alba of 90%, sprays into the water of terra alba total mass 7%, adopts nodulizer to make the dihydrate gypsum pelletizing of 5 ~ 8mm, for subsequent use;
(2) feeding gate of α type gypsum Special rotating calcining kiln is opened, starter motor makes rotary kiln body reverse, open the switch of hot plate body simultaneously, the Heating temperature of setting electric furnace body is 800 DEG C, when rotary kiln temperature rises to 450 ~ 550 DEG C, add in rotary kiln body by the dihydrate gypsum pelletizing prepared in step (1), feeding quantity is 40% of rotary kiln body cumulative volume, after reinforced, close and good seal feeding gate;
After (3) 10 minutes, detect vapor pressure in rotary kiln body and rise to 0.75Mpa, when temperature of charge rises to 160 ~ 180 DEG C, heat-insulation pressure keeping 15 minutes, open pressure release valve, make rotary kiln body Pressure Drop to 0.13Mpa, close hot plate body switch, open discharge door, waste heat is utilized to continue parch material 10 minutes, operating electrical machines makes rotary kiln body rotate forward, under the effect of spiral charging guide plate, the discharge port of material from rotary kiln body is drawn off, be transported to refining mill fine grinding to 100 ~ 150 orders, the α type that gets product gypsum, after testing, 6 ~ 8 minutes α type gypsum presetting periods of the present invention, final setting time 20 ~ 25 minutes, standard consistency is 36 ~ 38%, 2h folding strength > 10.0Mpa, dry ultimate compression strength > 40.0Mpa, reach the requirement of strength of α 40 gypsum in JC/T 2038-2010 standard,
Described α type gypsum Special rotating calcining kiln is with embodiment 1.
Embodiment 3
The method of a kind of low cost of the present invention, scale operation α type gypsum, carry out in the steps below:
(1) choose containing attached water 13%, crystal water 15%, terra alba grade is the terra alba of 95%, sprays into the water of terra alba total mass 6%, adopts nodulizer to make the dihydrate gypsum pelletizing of 5 ~ 8mm, for subsequent use;
(2) feeding gate of α type gypsum special directly-heated self-produced steam formula rotary calciner is opened, starter motor makes rotary kiln body reverse, open the switch of hot plate body simultaneously, the Heating temperature of setting electric furnace body is 1000 DEG C, when rotary kiln temperature rises to 450 ~ 550 DEG C, add in rotary kiln body by the dihydrate gypsum pelletizing prepared in step (1), feeding quantity is 35% of rotary kiln body cumulative volume, after reinforced, close and good seal feeding gate;
After (3) 5 minutes, detect vapor pressure in rotary kiln body and rise to 0.5Mpa, when temperature of charge rises to 150 ~ 160 DEG C, heat-insulation pressure keeping 20 minutes, open pressure release valve, make rotary kiln body Pressure Drop to 0.12Mpa, close hot plate body switch, open discharge door, waste heat is utilized to continue parch material 7 minutes, operating electrical machines makes rotary kiln body rotate forward, under the effect of spiral charging guide plate, the discharge port of material from rotary kiln body is drawn off, be transported to refining mill fine grinding to 100 ~ 150 orders, the α type that gets product gypsum, after testing, 8 ~ 10 minutes the present embodiment α type gypsum presetting periods, final setting time 25 ~ 30 minutes, standard consistency is 36 ~ 38%, 2h folding strength > 10.0Mpa, dry ultimate compression strength > 40.0Mpa, reach the requirement of strength of α 40 gypsum in JC/T 2038-2010 standard,
Described α type gypsum Special rotating calcining kiln is with embodiment 1.
Also by the product performance requirement of client to α type gypsum, crystal modifier suitable in right amount can be added in dihydrate gypsum raw material in above-described embodiment 1-3.
Embodiment 4
See Fig. 1-Fig. 3, a kind of low cost of the present embodiment, the device that the extensive method preparing α type gypsum is used, there is supporting seat 10, be provided with body of heater supporting seat is added, described body of heater is olive shape hot plate body 3, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, an olive shape rotary kiln body 4 is provided with in hot plate body 3 internal cavity, one end of described rotary kiln body is provided with opening for feed 13, the other end is provided with discharge port 14, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body 4 two ends section of stretching out each fixing sleeve, a wheel rim 7 is housed, two support rollers 8 are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port 14 one end is provided with a master wheel 6 by screw is also fastening, below master wheel, between two support rollers, engagement is fitted with a pinion(gear) 9, described pinion(gear) is by drive-motor 11 and step-down gear 12 driven rotary, be equipped with sealing gland 2 in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate 1, the sealing gland of opening for feed one end is also provided with pressure release valve 15, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates 5, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body 4 is also provided with temperature probe 17 and load cell 18.
Between described two support rollers 8 and the diad at wheel rim 7 point of contact place, angle is 60 °.
The block number of described spiral charging guide plate 5 is 1-4 block, and optimal way is 4 pieces.
Claims (4)
1. a method for low cost, scale operation α type gypsum, is characterized in that carrying out in the steps below:
(1) choose containing attached water 10 ~ 15%, crystal water 15 ~ 20%, terra alba grade is the terra alba of 90 ~ 95%, sprays into the water of terra alba total mass 5 ~ 7%, adopts nodulizer to make the dihydrate gypsum pelletizing of 5 ~ 10mm, for subsequent use;
(2) feeding gate of α type gypsum Special rotating calcining kiln is opened, starter motor makes rotary kiln body reverse, rotating speed 5 ~ 10r/min, open the switch of hot plate body, the Heating temperature of setting electric furnace body is 800 ~ 1000 DEG C, when rotary kiln temperature rises to 450 ~ 550 DEG C simultaneously, the dihydrate gypsum pelletizing prepared in step (1) is added in rotary kiln body, feeding quantity is 30 ~ 40% of rotary kiln body cumulative volume, after reinforced, closes and good seal feeding gate;
After (3) 5 ~ 10 minutes, detect vapor pressure in rotary kiln body and rise to 0.5 ~ 0.8Mpa, after temperature of charge rises to 150 ~ 180 DEG C, heat-insulation pressure keeping 10 ~ 20 minutes, open pressure release valve, rotary kiln body internal pressure is made to be down to 0.11 ~ 0.13Mpa, close hot plate body switch, open discharge door, waste heat is utilized to continue parch material 5 ~ 10 minutes, operating electrical machines makes rotary kiln body rotate forward, under the effect of spiral charging guide plate, material is transported to refining mill fine grinding to 100 ~ 150 orders after the discharge port of rotary kiln body draws off, the α type that gets product gypsum, after testing, 6 ~ 10 minutes α type gypsum presetting periods of the present invention, final setting time 20 ~ 30 minutes, standard consistency is 34 ~ 38%, 2h folding strength > 10.0Mpa, dry ultimate compression strength > 40.0Mpa, reach the requirement of strength of α 40 gypsum in JC/T 2038-2010 standard,
Described α type gypsum Special rotating calcining kiln, there is supporting seat, be provided with body of heater supporting seat is added, described body of heater is olive shape hot plate body, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, respectively at both ends open place be fasteningly provided with a sealing-ring, an olive shape rotary kiln body is provided with in hot plate body internal cavity, one end of described rotary kiln body is provided with opening for feed, the other end is provided with discharge port, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body two ends section of stretching out each fixing sleeve, a wheel rim is housed, two support rollers are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port one end is provided with a master wheel by screw is also fastening, below master wheel, between two support rollers, engagement is fitted with a pinion(gear), described pinion(gear) is by drive-motor and a step-down gear driven rotary, be equipped with sealing gland in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate, the sealing gland of opening for feed one end is also provided with pressure release valve, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body is also provided with temperature probe and load cell.
2. one kind for realizing a kind of low cost as claimed in claim 1, the device that the method for scale operation α type gypsum is used, there is supporting seat, be provided with body of heater supporting seat is added, it is characterized in that: described body of heater is olive shape hot plate body, described hot plate body inside is provided with olive shape cavity, open type is all arranged in the two ends of hot plate body, respectively at both ends open place be fasteningly provided with a sealing-ring, an olive shape rotary kiln body is provided with in hot plate body internal cavity, one end of described rotary kiln body is provided with opening for feed, the other end is provided with discharge port, opening for feed and discharge port all stretch out from hot plate body both ends open, at the described rotary kiln body two ends section of stretching out each fixing sleeve, a wheel rim is housed, two support rollers are respectively provided with on the both sides, bottom of each wheel rim, described support roller is contained on roller frame, described wheel rim contacts with corresponding support roller and arranges, the wheel rim of discharge port one end is provided with a master wheel by screw is also fastening, engage with master wheel between two support rollers below master wheel and be fitted with a pinion(gear), described pinion(gear) is by drive-motor and a step-down gear driven rotary, be equipped with sealing gland in the end of opening for feed and discharge port, sealing gland is all equipped with locking plate, the sealing gland of opening for feed one end is also provided with pressure release valve, the inside kiln body wall of described rotary kiln body is provided with some pieces of spiral charging guide plates, and described spiral charging guide plate length is pressed rotary kiln body 3/5 to 2/3 vertically and is arranged from discharge port to opening for feed, the inwall of described rotary kiln body is also provided with temperature probe and load cell.
3. the device that the method for a kind of low cost according to claim 2, scale operation α type gypsum is used, is characterized in that: between the diad at described two support rollers and wheel rim point of contact place, angle is 60 °.
4. the device that the method for a kind of low cost according to claim 2, scale operation α type gypsum is used, is characterized in that: the block number of described spiral charging guide plate is 1-4 block.
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| CN201410471095.5A CN104230192B (en) | 2014-09-17 | 2014-09-17 | A kind of method of low cost, scale operation α type gypsum and device |
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| CN201410471095.5A CN104230192B (en) | 2014-09-17 | 2014-09-17 | A kind of method of low cost, scale operation α type gypsum and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105060747A (en) * | 2015-08-05 | 2015-11-18 | 荆门市磊鑫石膏制品有限公司 | Calcining system for anhydrous calcium sulfate production line |
| CN105800978A (en) * | 2016-06-08 | 2016-07-27 | 湖南昌迅科技环保股份有限公司 | Rotary alpha gypsum powder crystallization kiln |
| CN107020185A (en) * | 2017-05-23 | 2017-08-08 | 中国有色（沈阳）冶金机械有限公司 | A kind of electrolyte resets autogenous tumbling mill |
| CN107597304A (en) * | 2017-10-30 | 2018-01-19 | 中国地质大学（武汉） | A kind of spring capping formula charging ball mill apparatus |
| CN113483538A (en) * | 2021-09-03 | 2021-10-08 | 南通绿洲节能环保产品有限公司 | Reciprocal gypsum granule drying equipment of type that expands and contracts |
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| CN2588299Y (en) * | 2002-12-20 | 2003-11-26 | 宁夏建筑材料研究院 | High-efficient gyp-incineration, kiln |
| CN102381848A (en) * | 2011-07-25 | 2012-03-21 | 黄石市建材节能设备总厂 | Efficient direct-heating gypsum calcination rotary kiln |
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| CN2183542Y (en) * | 1993-05-17 | 1994-11-23 | 兰州恒谊机械厂 | Converting kiln for dewatering and slaking salt lime powder |
| CN2225471Y (en) * | 1994-08-02 | 1996-04-24 | 何宜业 | High efficiency energy saving gypsum revolving calcining kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105060747A (en) * | 2015-08-05 | 2015-11-18 | 荆门市磊鑫石膏制品有限公司 | Calcining system for anhydrous calcium sulfate production line |
| CN105800978A (en) * | 2016-06-08 | 2016-07-27 | 湖南昌迅科技环保股份有限公司 | Rotary alpha gypsum powder crystallization kiln |
| CN105800978B (en) * | 2016-06-08 | 2017-09-01 | 湖南昌迅科技环保股份有限公司 | A kind of alpha gypsum powder rotates crystallization |
| CN107020185A (en) * | 2017-05-23 | 2017-08-08 | 中国有色（沈阳）冶金机械有限公司 | A kind of electrolyte resets autogenous tumbling mill |
| CN107597304A (en) * | 2017-10-30 | 2018-01-19 | 中国地质大学（武汉） | A kind of spring capping formula charging ball mill apparatus |
| CN113483538A (en) * | 2021-09-03 | 2021-10-08 | 南通绿洲节能环保产品有限公司 | Reciprocal gypsum granule drying equipment of type that expands and contracts |
| CN113483538B (en) * | 2021-09-03 | 2021-11-02 | 南通绿洲节能环保产品有限公司 | Reciprocal gypsum granule drying equipment of type that expands and contracts |
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