CN102241847A - Method for manufacturing power plant desulfurization gypsum environment-friendly paper - Google Patents
Method for manufacturing power plant desulfurization gypsum environment-friendly paper Download PDFInfo
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- CN102241847A CN102241847A CN 201110107207 CN201110107207A CN102241847A CN 102241847 A CN102241847 A CN 102241847A CN 201110107207 CN201110107207 CN 201110107207 CN 201110107207 A CN201110107207 A CN 201110107207A CN 102241847 A CN102241847 A CN 102241847A
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Abstract
The invention discloses a method for manufacturing power plant desulfurization gypsum environment-friendly paper, which is characterized by comprising the following steps of: decoloring power plant desulfurization gypsum; adding high-density polyethylene, decolored desulfurization gypsum, polyethylene glycol, stearic acid, and an antioxidant 1010 into a banbury, and banburying until the temperature reaches 170-190DEG C; introducing the mixed material into an extruder, feeding an extruded melt into a calender through a T-shaped die head, and calendering into sheets at the temperature of between 140 and 160DEG C; cooling the calendered sheets in cold water to below 5DEG C, and drying the surfaces of the sheets by using a blower; and feeding the surface dried sheets into a multi-roll drawing mill, preheating the sheets to the temperature of between 110 and 130DEG C, and drawing by using 2 to 5 groups of drawing rolls to obtain the required environment-friendly paper. The desulfurization gypsum environment-friendly paper has the density of 0.9-1.5g/cm<3>.
Description
Technical field
The present invention relates to a kind of manufacture method of power plant desulfurization gypsum environmental protection paper.
Background technology
Gypsum can be divided into the plaster of paris and crown filler by its source, and the plaster of paris is at Chinese aboundresources, and storage capacity occupies first place in the world.The crown filler is mainly derived from industrial by-products, in the means of flue gas desulfurization of power plant process, absorbs sulfurous gas with calcium hydroxide, makes dihydrate gypsum through oxidation again; Also by-product gypsum in the production process of phosphoric acid.The comprehensive utilization of industry by-product gypsum not only helps environment protection, also makes industrial by-products obtain effective utilization, is a good job of benefiting the nation and the people.So, be all wide material sources of the plaster of paris or crown filler, aboundresources, price is cheap, be easy to get.
Gypsum is as a kind of white pigment, its whiteness height, and to the good stability of soda acid, real density is little, and higher relatively specific refractory power is arranged, and hardness is low.Make slurry with gypsum and be used for coating, coating whiteness height; Ink receptivity is good; Acid still alkaline technology all adapts to; When coat-thickness was identical, the slurry consumption was few; When coating wt is identical, thick coating; Little to the coating apparatus wearing and tearing.
Environmental protection paper, once it is to be raw material with thermal plasticity high polymer (as polyethylene, polypropylene, polystyrene) to be called as chemical industry film paper, polymer paper, plastic paper etc., add certain inorganic particles, make different classes of product by different production units and complete processing.Therefore, environmental protection paper is the product that paper industry combines with plastics industry.
Chinese invention patent CN1229719 discloses a kind of method of making environmental protection paper, comprising: (1) will comprise that the composition of natural inorganic breeze, polyethylene and auxiliary agent makes granulate material through the mixing polymerization of extrusion; (2) granulate material is dropped into paper film maker, shape film forming pipe; (3) in the film pipe, fill the compression air, carry out the film pipe simultaneously and stretch, make environmental protection paper with two-way tissue intensity.This invention also relates to a kind of composition of making environmental protection paper, and it comprises the natural inorganic breeze of 56 to 80 weight %, the polyethylene of 43 to 18 weight % and the auxiliary agent of 1 to 2 weight %.
Chinese invention patent CN1785882 discloses a kind of high solid content gypsum sizing material and preparation method thereof.Said high solid content gypsum sizing material, its solid content are 30-80%, and grain graininess accounts for more than 30% of total number of particles for the particle less than 2 μ m, and slurry viscosity is less than 1000 centipoises.This patent also discloses the preparation method of two kinds of dispersion agents that are used to disperse high solid content gypsum sizing material simultaneously.The high solid content gypsum sizing material of this invention is mainly used in adding of paper and fills out and be coated with.
Chinese invention patent CN1134956 relates to the preparation method of BOPP perlatolic synthesized printing paper capable of quick drying, particularly the paper coating method.To with the compound grain of the high crystalline acrylic resin more than 97% and lime carbonate, the compound grain of titanium dioxide, the polypropylene resin composite of combination such as static inhibitor reaches by polypropylene, the resin combination that antisticking agent forms, forming thickness through mechanical workouts such as extruders is coating material below 100 μ, utilizes paper coating to obtain synthetic paper then.
Chinese invention patent CN101676326 provides a kind of composition and preparation method of novel synthetic paper material.By 50～85% (weight percent) polyolefin blends, the oxidation inhibitor elder generation premix of aforementioned material gross weight meter 0.1～1% is formed and added to 10% (weight percent) inorganic mineral powder and 5%～12% (weight percent) auxiliary agent, again through the twin screw extruder extruding pelletization, make the high-rigidity high-ductility base resin, its over-all properties all is better than common PP synthetic paper material, thereby has expanded its range of application.By adding auxiliary agent (static inhibitor, antiseptic-germicide, perfuming agent etc.), evenly spread in the resin matrix simultaneously, can satisfy the difference in functionality demand through melt blending.The paper of this high-performance PS and the moulding of PP alloy novel synthetic paper material can be widely used in packing, high quality printing product, label, bank note, sensitive paper, tracing paper, express envelope, paper fan, umbrella etc., a large amount of forest reserves, water resources be can save, treatment pressure of sewage and energy consumption alleviated.
The present invention adopts by-product gypsum in the means of flue gas desulfurization of power plant process.The comprehensive utilization of industry by-product gypsum not only helps environment protection, also makes industrial by-products obtain effective utilization, is a good job of benefiting the nation and the people.The means of flue gas desulfurization of power plant by-product gypsum often has redness or yellow because of containing iron, and the present invention with the decolouring of power plant desulfurization gypsum, makes ferrous iron be reduced into ferric iron under acidic conditions earlier, and ferric iron is not easy hydrolysis, can wash removal for water.
Summary of the invention
The manufacture method of a kind of power plant desulfurization gypsum of the present invention environmental protection paper, it is characterized in that: earlier the power plant desulfurization gypsum is decoloured, its method is: the slurry that the power plant desulfurization gypsum is dispersed into weight percentage 20～70%, in slurry, add sulfuric acid, slurry is warming up to 80～90 ℃, under constantly stirring, in slurry, add zinc powder, be incubated 30～60 minutes, filter, use deionized water wash, wash to the filtrate iron level less than 20ppm till, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster; Desulfurated plaster, polyoxyethylene glycol, stearic acid, antioxidant 1010 after high density polyethylene(HDPE), the decolouring are joined in the Banbury mixer, reach 170～190 ℃ through banburying to temperature; Then the material after the banburying is sent in the forcing machine, melt extrusion is sent in the rolling press through T pattern head, prolongs into sheet material 140～160 ℃ temperatures; Sheet material is sent into and is cooled in the cold water below 5 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the multiple roll drawing machine, and sheet material is preheated to 110～130 ℃ earlier in drawing machine, stretches through 2～5 groups of draw rolls, obtains the environmental protection paper that needs.
Described vitriolic add-on is: slurry per ton adds sulfuric acid (giving money as a gift into 100%) 10～30kg.
The add-on of described zinc powder is: desulfurated plaster per ton (giving money as a gift into 100%) adds zinc powder 2～8kg.
Described prescription high density polyethylene(HDPE) by weight is that 20～35 parts, desulfurated plaster are that 65～80 parts, polyoxyethylene glycol are that 0.5～1.5 part, stearic acid are that 1.0～3.0 parts, antioxidant 1010 are 0.1～0.5 part.
The heat fusing flow index MFI of described high density polyethylene(HDPE) is less than 1.0.
The molecular-weight average of described polyoxyethylene glycol is a kind of in 200,300,400,600,800.
The draw ratio of described sheet material in the multiple roll drawing machine is 1.5～3.5.
The density of described environmental protection paper is 0.9～1.5g/cm
3
Embodiment
Embodiment 1
85kg power plant desulfurization gypsum is added 345kg water make slurry, in slurry, add 95% sulfuric acid 12kg, slurry is warming up to 80 ℃, under constantly stirring, in slurry, add zinc powder 680g, be incubated 30 minutes, filter, use deionized water wash, wash that iron level 10ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 80kg.
With heat fusing flow index MFI is that desulfurated plaster 80kg, molecular-weight average after 0.2 high density polyethylene(HDPE) 20kg, the decolouring is that 200 polyoxyethylene glycol 1.0kg, stearic acid 1.5kg, antioxidant 1010 0.2kg join in the Banbury mixer, when banburying to temperature reaches 190 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, and melt extrusion is sent in the rolling press through T pattern head, prolongs into sheet material 150 ℃ temperatures, and the thickness of sheet material is 200 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 5 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the multiple roll drawing machine, and sheet material is preheated to 130 ℃ through oily warming mill earlier in drawing machine, stretches through 3 groups of draw rolls, and draw ratio is 2.0, and the environmental protection paper density that obtains is 1.1g/cm
3
Embodiment 2
80kg power plant desulfurization gypsum is added 35kg water make slurry, in slurry, add 95% sulfuric acid 1.2kg, slurry is warming up to 85 ℃, under constantly stirring, in slurry, add zinc powder 640g, be incubated 45 minutes, filter, use deionized water wash, wash that iron level 15ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 75kg.
With heat fusing flow index MFI is that desulfurated plaster 75kg, molecular-weight average after 0.5 high density polyethylene(HDPE) 25kg, the decolouring is that 400 polyoxyethylene glycol 1.5kg, stearic acid 1.0kg, antioxidant 1010 0.1kg join in the Banbury mixer, when banburying to temperature reaches 180 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, and melt extrusion is sent in the rolling press through T pattern head, prolongs into sheet material 160 ℃ temperatures, and the thickness of sheet material is 150 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 4 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the multiple roll drawing machine, and sheet material is preheated to 110 ℃ through oily warming mill earlier in drawing machine, stretches through 5 groups of draw rolls, and draw ratio is 3.5, and the environmental protection paper density that obtains is 0.9g/cm
3
Embodiment 3
70kg power plant desulfurization gypsum is added 105kg water make slurry, in slurry, add 95% sulfuric acid 2.6kg, slurry is warming up to 88 ℃, under constantly stirring, in slurry, add zinc powder 420g, be incubated 50 minutes, filter, use deionized water wash, wash that iron level 12ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 65kg.
With heat fusing flow index MFI is that desulfurated plaster 65kg, molecular-weight average after 0.05 high density polyethylene(HDPE) 35kg, the decolouring is that 600 polyoxyethylene glycol 0.5kg, stearic acid 5.0kg, antioxidant 1010 0.5kg join in the Banbury mixer, when banburying to temperature reaches 180 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, squeezes melt and is sent in the rolling press through T pattern head, prolongs into sheet material 170 ℃ temperatures, and the thickness of sheet material is 130 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 0 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the multiple roll drawing machine, and sheet material is preheated to 120 ℃ through oily warming mill earlier in drawing machine, stretches through 2 groups of draw rolls, and draw ratio is 1.5, and the environmental protection paper density that obtains is 1.4g/cm
3
Embodiment 4
75kg power plant desulfurization gypsum is added 175kg water make slurry, in slurry, add 95% sulfuric acid 7.5kg, slurry is warming up to 90 ℃, under constantly stirring, in slurry, add zinc powder 600g, be incubated 60 minutes, filter, use deionized water wash, wash that iron level 20ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 70kg.
With heat fusing flow index MFI is that desulfurated plaster 70kg, molecular-weight average after 0.5 high density polyethylene(HDPE) 30kg, the decolouring is that 200 polyoxyethylene glycol 0.8kg, stearic acid 2.5kg, antioxidant 1010 0.4kg join in the Banbury mixer, when banburying to temperature reaches 175 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, and melt is sent in the rolling press through T pattern head, prolongs into sheet material 170 ℃ temperatures, and the thickness of sheet material is 180 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 2 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the drawing machine, and sheet material is preheated to 125 ℃ through oily warming mill earlier in drawing machine, stretches through 4 groups of draw rolls, and draw ratio is 3.0, and the environmental protection paper density that obtains is 1.0g/cm
3
Embodiment 5
73kg power plant desulfurization gypsum is added 50kg water make slurry, in slurry, add 95% sulfuric acid 1.2kg, slurry is warming up to 87 ℃, under constantly stirring, in slurry, add zinc powder 150g, be incubated 35 minutes, filter, use deionized water wash, wash that iron level 10ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 68kg.
With heat fusing flow index MFI is that desulfurated plaster 68kg, molecular-weight average after 0.1 high density polyethylene(HDPE) 32kg, the decolouring is that 300 polyoxyethylene glycol 0.7kg, stearic acid 2.0kg, antioxidant 1010 0.1kg join in the Banbury mixer, when banburying to temperature reaches 185 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, and melt is sent in the rolling press through T pattern head, prolongs into sheet material 155 ℃ temperatures, and the thickness of sheet material is 170 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 3 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the drawing machine, and sheet material is preheated to 118 ℃ through oily warming mill earlier in drawing machine, stretches through 3 groups of draw rolls, and draw ratio is 2.5, and the environmental protection paper density that obtains is 1.2g/cm
3
Embodiment 6
77kg power plant desulfurization gypsum is added 308kg water make slurry, in slurry, add 95% sulfuric acid 3.8kg, slurry is warming up to 82 ℃, under constantly stirring, in slurry, add zinc powder 540g, be incubated 40 minutes, filter, use deionized water wash, wash that iron level 16ppm stops to wash to the filtrate, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster 72kg.
With heat fusing flow index MFI is that desulfurated plaster 72kg, molecular-weight average after 0.9 high density polyethylene(HDPE) 28kg, the decolouring is that 400 polyoxyethylene glycol 0.9kg, stearic acid 2.6kg, antioxidant 1010 0.5kg join in the Banbury mixer, when banburying to temperature reaches 182 ℃, stop banburying; Material after the banburying is sent in the forcing machine, and extrusion temperature is controlled at 200 ℃, and melt is sent in the rolling press through T pattern head, prolongs into sheet material 148 ℃ temperatures, and the thickness of sheet material is 190 μ m, and width is 800mm; Sheet material is sent in-5 ℃ of cold water and is cooled to 2 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the drawing machine, and sheet material is preheated to 122 ℃ through oily warming mill earlier in drawing machine, stretches through 4 groups of draw rolls, and draw ratio is 2.9, and the environmental protection paper density that obtains is 1.2g/cm
3
Claims (8)
1. the manufacture method of a power plant desulfurization gypsum environmental protection paper, it is characterized in that: earlier the power plant desulfurization gypsum is decoloured, its method is: the slurry that the power plant desulfurization gypsum is dispersed into weight percentage 20～70%, in slurry, add sulfuric acid, slurry is warming up to 80～90 ℃, under constantly stirring, in slurry, add zinc powder, be incubated 30～60 minutes, filter, use deionized water wash, wash to the filtrate iron level less than 20ppm till, take out filtration cakes torrefaction, pulverizing, obtain white powdered desulfurated plaster; Desulfurated plaster, polyoxyethylene glycol, stearic acid, antioxidant 1010 after high density polyethylene(HDPE), the decolouring are joined in the Banbury mixer, reach 170～190 ℃ through banburying to temperature; Then the material after the banburying is sent in the forcing machine, melt extrusion is sent in the rolling press through T pattern head, prolongs into sheet material 140～160 ℃ temperatures; Sheet material is sent into and is cooled in the cold water below 5 ℃, and sheet material dries up its surface through blower then; The sheet material that the surface dries up is sent in the multiple roll drawing machine, and sheet material is preheated to 110～130 ℃ earlier in drawing machine, stretches through 2～5 groups of draw rolls, obtains the environmental protection paper that needs.
2. the described method of claim 1, wherein the vitriolic add-on is: slurry per ton adds sulfuric acid (giving money as a gift into 100%) 10～30kg.
3. the described method of claim 1, wherein the add-on of zinc powder is: desulfurated plaster per ton (giving money as a gift into 100%) adds zinc powder 2～8kg.
4. the described method of claim 1, wherein high density polyethylene(HDPE) is that 20～35 parts, desulfurated plaster are that 65～80 parts, polyoxyethylene glycol are that 0.5～1.5 part, stearic acid are that 1.0～3.0 parts, antioxidant 1010 are 0.1～0.5 part by weight.
5. the described method of claim 1, wherein the heat fusing flow index MFI of high density polyethylene(HDPE) is less than 1.0.
6. the described method of claim 1, wherein the molecular-weight average of polyoxyethylene glycol is a kind of in 200,300,400,600,800.
7. the described method of claim 1, wherein the draw ratio of sheet material in the multiple roll drawing machine is 1.5～3.5.
8. the described method of claim 1, the density of wherein resulting environmental protection paper is 0.9～1.5g/cm
3
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| CN2011101072075A CN102241847B (en) | 2011-04-27 | 2011-04-27 | Method for manufacturing power plant desulfurization gypsum environment-friendly paper |
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| CN2011101072075A CN102241847B (en) | 2011-04-27 | 2011-04-27 | Method for manufacturing power plant desulfurization gypsum environment-friendly paper |
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| CN102241847B CN102241847B (en) | 2012-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523742A (en) * | 2014-09-28 | 2016-04-27 | 杨刚 | Phosphogypsum composite material and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284177B1 (en) * | 1996-10-15 | 2001-09-04 | William D. Ewing | Recyclable printable media |
| CN101831835A (en) * | 2010-05-01 | 2010-09-15 | 陈美章 | Stone papermaking method |
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2011
- 2011-04-27 CN CN2011101072075A patent/CN102241847B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6284177B1 (en) * | 1996-10-15 | 2001-09-04 | William D. Ewing | Recyclable printable media |
| CN101831835A (en) * | 2010-05-01 | 2010-09-15 | 陈美章 | Stone papermaking method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523742A (en) * | 2014-09-28 | 2016-04-27 | 杨刚 | Phosphogypsum composite material and manufacturing method thereof |
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| CN102241847B (en) | 2012-11-07 |
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