CN103011643B - Comprehensive utilization method of phosphogypsum and coal gangue - Google Patents
Comprehensive utilization method of phosphogypsum and coal gangue Download PDFInfo
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- CN103011643B CN103011643B CN201210569018.4A CN201210569018A CN103011643B CN 103011643 B CN103011643 B CN 103011643B CN 201210569018 A CN201210569018 A CN 201210569018A CN 103011643 B CN103011643 B CN 103011643B
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Abstract
The invention relates to a comprehensive utilization method of phosphogypsum and coal gangue. The comprehensive utilization method comprise the following steps of 1) increasing an environment temperature of a phosphogypsum adobe workshop by using coal gangue slag containing heat after combustion in a fluidized bed furnace and increasing the environment temperature of the phosphogypsum adobe workshop by using waste gas with relatively high temperature; and 2) preparing a phosphogypsum mixture before curing. The comprehensive utilization method has the advantages that 1) due to addition of cement early-strength agent in phosphogypsum balls, the phosphogypsum is an enhanced phosphogypsum ball cement retarder; 2) ex-factory time of the phosphogypsum balls is shortened by employing coal gangue as a fuel to dry the phosphogypsum balls and increasing the temperature of phosphogypsum bricks and building blocks piled environment; 3) the cured mixture can be used for producing the phosphogypsum balls with the diameter of 8-10 mm, the phosphogypsum building blocks with the size of 390 * 190 * 190 mm and the phosphogypsum bricks with the size of 240 * 120 * 5.5 mm; and 4) the whole production process has no secondary pollutions and energy waste.
Description
Technical field
The present invention relates to a kind ofly can utilize phosphogypsum, method for comprehensive utilization of coal gangue.
Background technology
According to measuring and calculating, 1 ton of phosphoric acid of every production approximately produces 5 tons of phosphogypsums.China Phosphate Industry Association's data presentation, 2006～2011 years, 6659.6 ten thousand tons of China's cumulative production high-concentration phosphate compound fertilizerses, corresponding phosphogypsum generation surpasses 300,000,000 tons, and wherein, volume of cargo in storage has surpassed 2.5 hundred million tons.The utilization of phosphogypsum is all a very large difficult problem in the world, has three kinds of modes can consume in a large number phosphogypsum as the retardant as cement, making gypsum brick and gypsum block; As cement setting retarder, be the mode of a utilization maximum, 10,000 tons of cement of every production can consume 300 tons of phosphogypsums, and the defect that can not use in a large number is at present that 1. phosphogypsum water content are more than 20%; 2. the phosphate anion that contains free state, needs dryer hyperthermia drying could supply with in a large number cement mill; Phosphogypsum is made to gypsum brick and gypsum block, gypsum brick need in air, after seasoning, could use and such production cycle long more than 7 days, and gypsum block need to be with using after steam heating.Utilize coal to provide heat to dry or produce steam, be uneconomically also unfavorable for energy-saving and emission-reduction; And the output of China's coal gangue is also very huge, from coal mining, the annual 100000000 t coals of producing of China, discharge spoil 14,000,000 t left and right; From coal preparation, every washing 100,000,000 t coking coal discharge spoil amount 2,000 ten thousand t, often wash 100,000,000 t steam coals, discharge spoil amount 15,000,000 t.2011, domestic all kinds of coal production coal 1,045 hundred million t, coal washing 38,500,000,000 t, discharge spoil amount 19-20 hundred million t.Thereby, more than 1500 of the existing waste dumps in national state-owned colliery, accumulating amount 3,000,000,000 t above (accounting for the more than 40% of Chinese industrial solid waste total emission volumn).
Summary of the invention
What the present invention proposed is a kind of phosphogypsum, method for comprehensive utilization of coal gangue, and its object is intended to utilize phosphogypsum, coal gangue waste residue, and preparation can be used for producing phosphogypsum.
Technical solution of the present invention: comprise following processing step:
One) utilize the bastard coal rock ballast that contains heat after boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize the waste gas of the comparatively high temps after drying machine, large cloth bag, induced draft fan to improve the envrionment temperature in phosphogypsum building block workshop;
Two) preparation of Cheng Huaqian phosphogypsum mixture.
Advantage of the present invention:
1) owing to adding cement early strength agent at phosphogypsum ball, give the enhancement function of phosphogypsum ball to cement, belonged to enhancement type phosphogypsum ball cement setting retarder;
2) owing to adopting bastard coal masonry fuel to dry phosphogypsum ball, and utilize the waste heat raising ardealite brick of drying system and the temperature that environment is stacked in building block, shorten their time of making the product.Production process of the present invention is: through pulverizing the coal gangue particle that reaches 1-8mm, through metering conveyor, send into boiling furnace combustion, the fluidizing furnace temperature of trouble-free burning is controlled at 900-1000 degree, the vacuum flow that the hot gas that fluidizing furnace produces is produced through large sack cleaner by induced draft fan is crossed rotary dryer, meet and heat-shift with the phosphogypsum ball of moisture content, thereby dry phosphogypsum ball; And the waste heat of bastard coal rock ballast and waste gas is used;
3) one-tenthization batching is by phosphogypsum 80-90%, cement early strength agent chemical fibre factory waste residue (contains sodium sulfate 95% left and right) or 99% sodium sulfate 3-5% and modified binder (lime or cement of low index) 8-15%, enters after stirrer mixes, to enter into change Kuchengization and within 1-10 hour, clear up trace amounts of phosphorus acid ion residual in phosphogypsum; The mixture of Cheng Huahou can be used for producing phosphogypsum ball (diameter is 8-10mm), phosphogypsum building block (being of a size of 390x190x190mm) and ardealite brick (being of a size of 240x120x5.5mm);
4) whole production process non-secondary pollution and energy dissipation.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of phosphogypsum ball oven dry and comprehensive waste-heat utilizing device.
In figure 1 is fluidizing furnace, the 2nd, dryer, the 3rd, apparatus for making pearl ball, the 4th, induced draft fan, the 5th, large sack cleaner, the 6th, phosphogypsum building block storehouse, the 7th, high temperature resistant chain mat machine, the 8th, ardealite brick storehouse, the 9th, phosphogypsum ball storehouse, the 10th, bastard coal rock ballast storehouse, the 11st, pulverizer, the 12nd, lift.
Embodiment
Contrast accompanying drawing 1, its structure is that pulverizer 11 joins by chute and fluidizing furnace 1, fluidizing furnace 1 is connected with rotary dryer 2 by hot gas duct, induced draft fan 4 is connected with phosphogypsum building block workshop 6 by large sack cleaner 5, the corresponding setting of entrance of the outlet of apparatus for making pearl ball 3 and rotary dryer 2, rotary dryer 2 joins through the entrance in lift 12 phosphogypsum ball storehouses 9; Boiling furnace combustion outlet, high temperature resistant chain mat machine 7, ardealite brick workshop 8, bastard coal rock ballast storehouse 10 are connected in series successively.Utilize the fuel of the bastard coal masonry fluidizing furnace 1 that pulverizer 11 pulverized that heat is provided, with rotary dryer 2, do dry heat switching equipment, phosphogypsum mixture (phosphogypsum, cement or lime powder, hardening accelerator etc.) through rotary type apparatus for making pearl ball 3, make phosphogypsum ball, the vacuum flow that the hot gas that fluidizing furnace 1 produces is produced through large sack cleaner 5 by induced draft fan 4 is crossed rotary dryer 2, phosphogypsum ball enters in rotary dryer 2 by hot air seasoning, drying time 20 minutes or when the moisture of phosphogypsum ball is lower than 2% time, phosphogypsum ball after oven dry enters phosphogypsum ball storehouse 9 through lift 12 and stores, dryer 2 enters phosphogypsum building block storehouse 6 through the waste heat of induced draft fan 4 discharges, fluidizing furnace 1 is by the bastard coal rock ballast of getting rid of through high temperature resistant chain mat machine 7, ardealite brick storehouse 8, and normal temperature borehole cooling, enters bastard coal rock ballast storehouse 10 by the bastard coal rock ballast that approaches envrionment temperature and store.
A method for phosphogypsum, coal gangue comprehensive utilization, comprises following processing step:
One) utilize the bastard coal rock ballast that contains heat after boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize the waste gas of the comparatively high temps after drying machine, large cloth bag, induced draft fan to improve the envrionment temperature in phosphogypsum building block workshop;
Two) preparation of Cheng Huaqian phosphogypsum mixture;
Described processing step one) utilize the bastard coal rock ballast that contains heat after boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop, comprise
1) coal gangue is sent into pulverizer, is ground into coal gangue particle,
2) coal gangue particle is transported on lift,
3) coal gangue particle is sent into colliery powder storehouse by lift,
4) coal gangue particle is transported to measuring belt conveyer from colliery powder storehouse and measures,
5) coal gangue particle measuring is transported in fluidizing furnace and is burnt by measuring belt conveyer, produces bastard coal rock ballast and hot gas after burning, and the vacuum flow that hot gas is produced through large sack cleaner by induced draft fan is crossed rotary dryer,
6) bastard coal rock ballast is transported on high temperature resistant chain mat machine,
7) bastard coal rock ballast is passed from the first UTILIZATION OF VESIDUAL HEAT IN storehouse by high temperature resistant chain mat machine, promotes the temperature in the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
8) bastard coal rock ballast is transported in lift through the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
9) bastard coal rock ballast is transported in slag storehouse by lift,
10) the bastard coal rock ballast in slag storehouse dispatches from the factory;
Described processing step two) preparation of Cheng Huaqian phosphogypsum mixture, comprises
1) phosphogypsum, chemical fibre factory's waste residue (containing 95% sodium sulfate left and right) or sodium sulfate and modified binder (lime or cement of low index) are transported on measuring belt and are measured respectively,
2) the per-cent 80-87%, chemical fibre factory's waste residue (containing 95% sodium sulfate left and right) that the phosphogypsum measuring accounts for weight accounts for per-cent 10-15% that the per-cent 5% of weight or per-cent 3% that sodium sulfate accounts for weight and modified binder (lime or cement of low index) account for weight and stirs by sending into stirrer together with measuring belt
3) mixture after stirring is sent into into change Kuchengization,
4) mixture after one-tenthization is adopted to shovel loader transhipment,
5) mixture of Cheng Huahou is sent into stirrer by shovel loader and is stirred,
6) prepare phosphogypsum ball, brick, building block,
(1) prepare phosphogypsum ball, comprise,
1. the mixture after stirring is transported to and on pan-pelletizer, makes phosphogypsum ball,
2. the phosphogypsum ball that particle diameter is qualified is fallen on rotary conveyor by own wt,
3. phosphogypsum ball is transported in dryer and is dried by conveyor, dries moisture to phosphogypsum ball lower than 2%,
4. the phosphogypsum ball after drying is transported in lift, the negative pressure that the waste heat producing in dryer is produced through large sack cleaner by induced draft fan by pipeline flows into the second UTILIZATION OF VESIDUAL HEAT IN storehouse,
5. the phosphogypsum ball after drying is transported in phosphogypsum storehouse by lift,
6. the phosphogypsum ball in phosphogypsum storehouse dispatches from the factory;
(2) prepare ardealite brick, comprise,
1. the mixture after one-tenthization is transported to and on forming machine, makes ardealite brick,
2. ardealite brick is transported on fork truck,
3. ardealite brick is transported in the first UTILIZATION OF VESIDUAL HEAT IN storehouse and is heated by fork truck,
4. the ardealite brick after heating is transported on fork truck,
5. the ardealite brick after heating is carried and is transported on ardealite brick trestle work by fork truck,
6. the ardealite brick on ardealite brick trestle work dispatches from the factory;
(3) prepare phosphogypsum building block, comprise,
1. the mixture after stirring is transported to and on forming machine, makes phosphogypsum building block,
2. phosphogypsum building block is transported on fork truck,
3. phosphogypsum building block is transported in the second UTILIZATION OF VESIDUAL HEAT IN storehouse and is heated by fork truck,
4. the phosphogypsum building block after heating is transported on fork truck,
5. the phosphogypsum building block after heating is carried and is transported on phosphogypsum building block trestle work by fork truck,
6. the phosphogypsum building block on phosphogypsum building block trestle work is dispatched from the factory.
Phosphogypsum of the present invention is the industrial residue of phosphoric acid factory (ammonium phosphate plant is in phosphoric acid production operation) discharge, SO
3content 36-45%.
Cement early strength agent of the present invention discharges a kind of waste residue of contains sodium sulfate while being anhydrous sodium sulphate or chemical fibre factory's production staple fibre, sodium sulfate is the generally acknowledged toughener of cement or concrete, intensity 10% left and right of cement can be improved, in the situation that keeping cement raw intensity constant, the ratio that cement production enterprise utilizes producing cement from fag end can be improved.
Modified binder of the present invention is that PC32.5 class g cement or calcium content are at more than 70% lime powder.They meet water meeting setting and harden after mixing with phosphogypsum, in the inner cohesive action of phosphogypsum ball.
Embodiment 1.
Phosphogypsum 80%, chemical fibre factory's waste residue (contains sodium sulfate 95% left and right) 5% and properties-correcting agent lime powder 15%, enter stirrer mixing and enter into change Kuchengization by belt conveyer after metering.
Embodiment 2.
Phosphogypsum 85%, chemical fibre factory's waste residue (contains sodium sulfate 95% left and right) 5% and properties-correcting agent PC32.5 class g cement 10%, enter stirrer mixing and enter into change Kuchengization by belt conveyer after metering.
Embodiment 3.
Phosphogypsum 82%, sodium sulfate 3% and properties-correcting agent lime powder 15%, enter stirrer mixing and enter into change Kuchengization by belt conveyer after metering.
Embodiment 4.
Phosphogypsum 87%, sodium sulfate 3% and properties-correcting agent PC32.5 class g cement 10%, enter stirrer mixing and enter into change Kuchengization by belt conveyer after metering.
Claims (1)
1. phosphogypsum, a method for comprehensive utilization of coal gangue, is characterized in that the method comprises following processing step,
One) utilize the bastard coal rock ballast that contains heat after boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize the waste gas of the comparatively high temps after drying machine, large cloth bag, induced draft fan to improve the envrionment temperature in phosphogypsum building block workshop;
Two) preparation of Cheng Huaqian phosphogypsum mixture;
Described processing step one) utilize the bastard coal rock ballast that contains heat after boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize the waste gas of the comparatively high temps after drying machine, large cloth bag, induced draft fan to improve the envrionment temperature in phosphogypsum building block workshop; Specifically comprise,
1) coal gangue is sent into pulverizer, is ground into coal gangue particle,
2) coal gangue particle is transported on lift,
3) coal gangue particle is sent into colliery powder storehouse by lift,
4) coal gangue particle is transported to measuring belt conveyer from colliery powder storehouse and measures,
5) coal gangue particle measuring is transported in fluidizing furnace and is burnt by measuring belt conveyer, produces bastard coal rock ballast and hot gas after burning, and the vacuum flow that hot gas is produced through large sack cleaner by induced draft fan is crossed rotary dryer,
6) bastard coal rock ballast is transported on high temperature resistant chain mat machine,
7) bastard coal rock ballast is passed from the first UTILIZATION OF VESIDUAL HEAT IN storehouse by high temperature resistant chain mat machine, promotes the temperature in the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
8) bastard coal rock ballast is transported in lift through the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
9) bastard coal rock ballast is transported in slag storehouse by lift,
10) the bastard coal rock ballast in slag storehouse dispatches from the factory;
Described processing step two) preparation of Cheng Huaqian phosphogypsum mixture, specifically comprises,
1) phosphogypsum, the chemical fibre factory's waste residue that contains 95% sodium sulfate or sodium sulfate and modified binder are transported on measuring belt and are measured respectively, described binding agent is lime or cement of low index,
2) phosphogypsum measuring account for weight per-cent 80%, 82%, 85% or 87%, containing chemical fibre factory's waste residue of 95% sodium sulfate, account for the per-cent 5% of weight or per-cent 3% that sodium sulfate accounts for weight and properties-correcting agent lime powder and account for the per-cent 15% of weight or per-cent 10% that properties-correcting agent PC32.5 class g cement accounts for weight and stir by sending into stirrer together with measuring belt
3) mixture after stirring is sent into into change Kuchengization,
4) mixture after one-tenthization is adopted to shovel loader transhipment,
5) mixture of Cheng Huahou is sent into stirrer by shovel loader and is stirred,
6) prepare phosphogypsum ball, brick, building block,
(1) prepare phosphogypsum ball, comprise,
1. the mixture after stirring is transported to and on pan-pelletizer, makes phosphogypsum ball,
2. the phosphogypsum ball that particle diameter is qualified is fallen on rotary conveyor by own wt,
3. phosphogypsum ball is transported in dryer and is dried by conveyor, dries moisture to phosphogypsum ball lower than 2%,
4. the phosphogypsum ball after drying is transported in lift, the negative pressure that the waste heat producing in dryer is produced through large sack cleaner by induced draft fan by pipeline flows into the second UTILIZATION OF VESIDUAL HEAT IN storehouse,
5. the phosphogypsum ball after drying is transported in phosphogypsum storehouse by lift,
6. the phosphogypsum ball in phosphogypsum storehouse dispatches from the factory;
(2) prepare ardealite brick, comprise,
1. the mixture after one-tenthization is transported to and on forming machine, makes ardealite brick,
2. ardealite brick is transported on fork truck,
3. ardealite brick is transported in the first UTILIZATION OF VESIDUAL HEAT IN storehouse and is heated by fork truck,
4. the ardealite brick after heating is transported on fork truck,
5. the ardealite brick after heating is carried and is transported on ardealite brick trestle work by fork truck,
6. the ardealite brick on ardealite brick trestle work dispatches from the factory;
(3) prepare phosphogypsum building block, comprise,
1. the mixture after stirring is transported to and on forming machine, makes phosphogypsum building block,
2. phosphogypsum building block is transported on fork truck,
3. phosphogypsum building block is transported in the second UTILIZATION OF VESIDUAL HEAT IN storehouse and is heated by fork truck,
4. the phosphogypsum building block after heating is transported on fork truck,
5. the phosphogypsum building block after heating is carried and is transported on phosphogypsum building block trestle work by fork truck,
6. the phosphogypsum building block on phosphogypsum building block trestle work is dispatched from the factory.
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| CN104015256B (en) * | 2014-05-05 | 2016-08-17 | 广德县苑瑞新型建材有限公司 | A kind of process units of environmental protection brick |
| CN114669233B (en) * | 2022-04-20 | 2023-03-21 | 北京干雾科技有限公司 | Device and method for mixed utilization of pebble coal and coal gasification fine slag |
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|---|---|---|---|---|
| EP0394557A1 (en) * | 1989-04-26 | 1990-10-31 | VAW Aluminium AG | Process for the production of low-chloride gypsum products from calcium containing wastes, from flue gas purification plants |
| CN1085879A (en) * | 1992-10-16 | 1994-04-27 | 湖北襄樊水泥厂 | Producing cement from phosphor production is with strengthening gypsum sphere |
| CN101265068A (en) * | 2008-04-28 | 2008-09-17 | 长沙归一建材科技有限公司 | Gelatinization material gypsum-cement and producing method thereof |
| JP4419846B2 (en) * | 2005-01-11 | 2010-02-24 | 三菱マテリアル株式会社 | Gypsum recycling system |
| CN101830678A (en) * | 2009-03-13 | 2010-09-15 | 上海晋马建材有限公司 | Desulfurized gypsum.phosphorous gypsum without roasting, extruding gypsum block and production method thereof |
-
2012
- 2012-12-25 CN CN201210569018.4A patent/CN103011643B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0394557A1 (en) * | 1989-04-26 | 1990-10-31 | VAW Aluminium AG | Process for the production of low-chloride gypsum products from calcium containing wastes, from flue gas purification plants |
| CN1085879A (en) * | 1992-10-16 | 1994-04-27 | 湖北襄樊水泥厂 | Producing cement from phosphor production is with strengthening gypsum sphere |
| JP4419846B2 (en) * | 2005-01-11 | 2010-02-24 | 三菱マテリアル株式会社 | Gypsum recycling system |
| CN101265068A (en) * | 2008-04-28 | 2008-09-17 | 长沙归一建材科技有限公司 | Gelatinization material gypsum-cement and producing method thereof |
| CN101830678A (en) * | 2009-03-13 | 2010-09-15 | 上海晋马建材有限公司 | Desulfurized gypsum.phosphorous gypsum without roasting, extruding gypsum block and production method thereof |
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