CN103011643A - Comprehensive utilization method of phosphogypsum and coal gangue - Google Patents
Comprehensive utilization method of phosphogypsum and coal gangue Download PDFInfo
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- CN103011643A CN103011643A CN2012105690184A CN201210569018A CN103011643A CN 103011643 A CN103011643 A CN 103011643A CN 2012105690184 A CN2012105690184 A CN 2012105690184A CN 201210569018 A CN201210569018 A CN 201210569018A CN 103011643 A CN103011643 A CN 103011643A
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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 all is a very large difficult problem in the world, has three kinds of modes can consume in a large number phosphogypsum such as retardant, making gypsum brick and gypsum block as cement; Be the mode of a utilization maximum as cement setting retarder, 10,000 tons of cement of every production can consume 300 tons of phosphogypsums, and the defective that can not use in a large number at present is that 1. phosphogypsum water content are more than 20%; 2. the phosphate anion that contains free state needs the dryer hyperthermia drying could supply with in a large number the cement mill; Phosphogypsum is made gypsum brick and gypsum block, gypsum brick need in air, could use after the seasoning and such production cycle long more than 7 days, and gypsum block need to be with using after the steam heating.Utilize coal to provide heat to dry or produce steam, uneconomically also be unfavorable for energy-saving and emission-reduction; And the output of China's coal gangue is also very huge, and from coal mining, the annual 100000000 t coals of producing of China are about discharging spoil 14,000,000 t; From coal preparation, every washing 100,000,000 t coking coals discharging spoil amount 2,000 ten thousand t whenever wash 100,000,000 t steam coals, discharging 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, discharging 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 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 purpose 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) waste gas of the comparatively high temps after utilizing the bastard coal rock ballast that contains heat behind the boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize drying machine, large cloth bag, induced draft fan improves 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, gives the enhancement function of phosphogypsum ball to cement, belonged to enhancement type phosphogypsum ball cement setting retarder;
2) because employing bastard coal masonry fuel is dried 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, send into boiling furnace combustion through metering conveyor, the fluidizing furnace temperature of trouble-free burning is controlled at the 900-1000 degree, the hot gas that fluidizing furnace produces is crossed rotary dryer by induced draft fan through the vacuum flow that large sack cleaner produces, meet and heat-shift with the phosphogypsum ball of moisture content, thus the oven dry phosphogypsum ball; And the waste heat of bastard coal rock ballast and waste gas is used;
3) the one-tenthization batching is with phosphogypsum 80-90%, cement early strength agent chemical fibre factory waste residue (about contains sodium sulfate 95%) or 99% sodium sulfate 3-5% and modified binder (lime or cement of low index) 8-15%, enters to enter into change Kuchengization after stirrer mixes and cleared up trace amounts of phosphorus acid ion residual in the phosphogypsum in 1-10 hour; 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.
Description of drawings
Accompanying drawing 1 is the structural representation of phosphogypsum ball oven dry and comprehensive waste-heat utilizing device.
Among the 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
The method of a kind of phosphogypsum, coal gangue comprehensive utilization comprises following processing step:
One) waste gas of the comparatively high temps after utilizing the bastard coal rock ballast that contains heat behind the boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize drying machine, large cloth bag, induced draft fan improves the envrionment temperature in phosphogypsum building block workshop;
Two) preparation of Cheng Huaqian phosphogypsum mixture;
Described processing step one) utilizes the bastard coal rock ballast that contains heat behind the 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 the lift,
3) coal gangue particle is sent into the colliery powder storehouse by lift,
4) coal gangue particle is transported to measuring belt conveyer from the colliery powder storehouse and measures,
5) coal gangue particle that measured is transported in the fluidizing furnace by measuring belt conveyer and burns, and produces bastard coal rock ballast and hot gas after the burning, and hot gas is crossed rotary dryer by induced draft fan through the vacuum flow that large sack cleaner produces,
6) the bastard coal rock ballast is transported on the high temperature resistant chain mat machine,
7) the 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) the bastard coal rock ballast is transported in the lift through the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
9) the bastard coal rock ballast is transported in the slag storehouse by lift,
10) the bastard coal rock ballast in the 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 about 95% sodium sulfate) or sodium sulfate and modified binder (lime or cement of low index) be transported on the measuring belt respectively measure,
2) phosphogypsum that measured accounts for per-cent 10-15% that the per-cent 80-87% of weight, per-cent 5% that chemical fibre factory's waste residue accounts for (containing about 95% sodium sulfate) weight or per-cent 3% that sodium sulfate accounts for weight and modified binder (lime or cement of low index) accounts for weight and sends into together stirrer by measuring belt and stir
3) mixture after will stirring is sent into into change Kuchengization,
4) mixture after will one-tenth adopts the shovel loader transhipment,
5) mixture of Cheng Huahou is sent into stirrer by shovel loader and is stirred,
6) preparation phosphogypsum ball, brick, building block,
(1) the preparation phosphogypsum ball comprises,
1. the mixture after will stirring is transported to and makes phosphogypsum ball on the pan-pelletizer,
2. the phosphogypsum ball that particle diameter is qualified is fallen on the rotary conveyor by own wt,
3. phosphogypsum ball is transported in the dryer by conveyor and dries, dry to the moisture of phosphogypsum ball to be lower than 2%,
4. the phosphogypsum ball after will drying is transported in the lift, and the waste heat that produces in the dryer flows into the second UTILIZATION OF VESIDUAL HEAT IN storehouse by induced draft fan through the negative pressure that large sack cleaner produces by pipeline,
5. the phosphogypsum ball after the oven dry is transported in the phosphogypsum storehouse by lift,
6. the phosphogypsum ball in the phosphogypsum storehouse dispatches from the factory;
(2) the preparation ardealite brick comprises,
1. the mixture after will one-tenth is transported to makes ardealite brick on the forming machine,
2. ardealite brick is transported on the fork truck,
3. ardealite brick is transported in the first UTILIZATION OF VESIDUAL HEAT IN storehouse by fork truck and heats,
4. the ardealite brick after will heating is transported on the fork truck,
5. the ardealite brick after the heating is carried by fork truck and is transported on the ardealite brick trestle work,
6. the ardealite brick on the ardealite brick trestle work dispatches from the factory;
(3) building block of preparation phosphogypsum comprises,
1. the mixture after will stirring is transported to and makes the phosphogypsum building block on the forming machine,
2. the phosphogypsum building block is transported on the fork truck,
3. the phosphogypsum building block is transported in the second UTILIZATION OF VESIDUAL HEAT IN storehouse by fork truck and heats,
4. the phosphogypsum building block after will heating is transported on the fork truck,
5. the phosphogypsum building block after the heating is carried by fork truck and is transported on the phosphogypsum building block trestle work,
6. the phosphogypsum building block on the 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 the phosphoric acid production operation) discharging, SO
3Content 36-45%.
Cement early strength agent of the present invention discharges a kind of waste residue of contains sodium sulfate when being anhydrous sodium sulphate or chemical fibre factory's production staple fibre, sodium sulfate is the toughener that cement or concrete are generally acknowledged, can improve the intensity about 10% of cement, in the situation that keep that cement raw intensity is constant to improve the ratio that cement production enterprise utilizes producing cement from fag end.
Modified binder of the present invention is that PC32.5 class g cement or calcium content are at the lime powder more than 70%.They meet water meeting setting and harden after mixing with phosphogypsum, in the inner cohesive action of phosphogypsum ball.
Phosphogypsum 80%, chemical fibre factory's waste residue (about contains sodium sulfate 95%) 5% and properties-correcting agent lime powder 15% enter the stirrer mixing and enter into change Kuchengization by belt conveyer after the metering.
Phosphogypsum 85%, chemical fibre factory's waste residue (about contains sodium sulfate 95%) 5% and properties-correcting agent PC32.5 class g cement 10% enter the stirrer mixing and enter into change Kuchengization by belt conveyer after the metering.
Phosphogypsum 82%, sodium sulfate 3% and properties-correcting agent lime powder 15% enter the stirrer mixing and enter into change Kuchengization by belt conveyer after the metering.
Phosphogypsum 87%, sodium sulfate 3% and properties-correcting agent PC32.5 class g cement 10% enter the stirrer mixing and enter into change Kuchengization by belt conveyer after the metering.
Claims (1)
1. a phosphogypsum, method for comprehensive utilization of coal gangue is characterized in that the method comprises following processing step,
One) waste gas of the comparatively high temps after utilizing the bastard coal rock ballast that contains heat behind the boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize drying machine, large cloth bag, induced draft fan improves the envrionment temperature in phosphogypsum building block workshop;
Two) preparation of Cheng Huaqian phosphogypsum mixture;
Described processing step one) waste gas of the comparatively high temps after utilizing the bastard coal rock ballast that contains heat behind the boiling furnace combustion to improve the envrionment temperature in phosphogypsum adobe workshop and utilize drying machine, large cloth bag, induced draft fan improves 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 the lift,
3) coal gangue particle is sent into the colliery powder storehouse by lift,
4) coal gangue particle is transported to measuring belt conveyer from the colliery powder storehouse and measures,
5) coal gangue particle that measured is transported in the fluidizing furnace by measuring belt conveyer and burns, and produces bastard coal rock ballast and hot gas after the burning, and hot gas is crossed rotary dryer by induced draft fan through the vacuum flow that large sack cleaner produces,
6) the bastard coal rock ballast is transported on the high temperature resistant chain mat machine,
7) the 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) the bastard coal rock ballast is transported in the lift through the first UTILIZATION OF VESIDUAL HEAT IN storehouse,
9) the bastard coal rock ballast is transported in the slag storehouse by lift,
10) the bastard coal rock ballast in the slag storehouse dispatches from the factory;
Described processing step two) preparation of Cheng Huaqian phosphogypsum mixture specifically comprises,
1) phosphogypsum, chemical fibre factory's waste residue (containing 95% sodium sulfate) or sodium sulfate and modified binder be transported on the measuring belt respectively measure,
2) phosphogypsum that measured accounts for per-cent 10-15% that the per-cent 80-87% of weight, per-cent 5% that chemical fibre factory's waste residue accounts for (containing 95% sodium sulfate) weight or per-cent 3% that sodium sulfate accounts for weight and modified binder accounts for weight and sends into together stirrer by measuring belt and stir
3) mixture after will stirring is sent into into change Kuchengization,
4) mixture after will one-tenth adopts the shovel loader transhipment,
5) mixture of Cheng Huahou is sent into stirrer by shovel loader and is stirred,
6) preparation phosphogypsum ball, brick, building block,
(1) the preparation phosphogypsum ball comprises,
1. the mixture after will stirring is transported to and makes phosphogypsum ball on the pan-pelletizer,
2. the phosphogypsum ball that particle diameter is qualified is fallen on the rotary conveyor by own wt,
3. phosphogypsum ball is transported in the dryer by conveyor and dries, dry to the moisture of phosphogypsum ball to be lower than 2%,
4. the phosphogypsum ball after will drying is transported in the lift, and the waste heat that produces in the dryer flows into the second UTILIZATION OF VESIDUAL HEAT IN storehouse by induced draft fan through the negative pressure that large sack cleaner produces by pipeline,
5. the phosphogypsum ball after the oven dry is transported in the phosphogypsum storehouse by lift,
6. the phosphogypsum ball in the phosphogypsum storehouse dispatches from the factory;
(2) the preparation ardealite brick comprises,
1. the mixture after will one-tenth is transported to makes ardealite brick on the forming machine,
2. ardealite brick is transported on the fork truck,
3. ardealite brick is transported in the first UTILIZATION OF VESIDUAL HEAT IN storehouse by fork truck and heats,
4. the ardealite brick after will heating is transported on the fork truck,
5. the ardealite brick after the heating is carried by fork truck and is transported on the ardealite brick trestle work,
6. the ardealite brick on the ardealite brick trestle work dispatches from the factory;
(3) building block of preparation phosphogypsum comprises,
1. the mixture after will stirring is transported to and makes the phosphogypsum building block on the forming machine,
2. the phosphogypsum building block is transported on the fork truck,
3. the phosphogypsum building block is transported in the second UTILIZATION OF VESIDUAL HEAT IN storehouse by fork truck and heats,
4. the phosphogypsum building block after will heating is transported on the fork truck,
5. the phosphogypsum building block after the heating is carried by fork truck and is transported on the phosphogypsum building block trestle work,
6. the phosphogypsum building block on the phosphogypsum building block trestle work is dispatched from the factory.
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| CN201210569018.4A CN103011643B (en) | 2012-12-25 | 2012-12-25 | Comprehensive utilization method of phosphogypsum and coal gangue |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015256A (en) * | 2014-05-05 | 2014-09-03 | 广德县苑瑞新型建材有限公司 | Production device for environment-friendly bricks |
| CN114669233A (en) * | 2022-04-20 | 2022-06-28 | 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 |
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| JP4419846B2 (en) * | 2005-01-11 | 2010-02-24 | 三菱マテリアル株式会社 | Gypsum recycling system |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104015256A (en) * | 2014-05-05 | 2014-09-03 | 广德县苑瑞新型建材有限公司 | Production device for environment-friendly bricks |
| 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 |
| CN114669233A (en) * | 2022-04-20 | 2022-06-28 | 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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