CN105084852A - Preparation method of phosphogypsum-base composite thermal-insulation mortar - Google Patents
Preparation method of phosphogypsum-base composite thermal-insulation mortar Download PDFInfo
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- CN105084852A CN105084852A CN201510584771.4A CN201510584771A CN105084852A CN 105084852 A CN105084852 A CN 105084852A CN 201510584771 A CN201510584771 A CN 201510584771A CN 105084852 A CN105084852 A CN 105084852A
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Abstract
The invention discloses a preparation method of phosphogypsum-base composite thermal-insulation mortar, belonging to the field of mortar manufacturing. The preparation method comprises the following steps: carrying out water washing and lime neutralization on phosphogypsum, calcining to obtain micro/nano phosphogypsum, pulverizing the micro/nano phosphogypsum and lime rock slag to obtain mixed powder, adding a Portland cement composite setting accelerator, an alkaline activator and methyl cellulose into the mixed powder to obtain a phosphogypsum-base cementing material, pulverizing, adding expanded perlite, polystyrene foam particles, furnace slag and polysiloxane, hardening, drying and pulverizing. The CaO added into the phosphogypsum can reduce the adverse effects of phosphorus and fluorine in the phosphogypsum on the phosphogypsum-base mortar. The added expanded perlite obviously enhances the thermal-insulation property of the mortar.
Description
Technical field
The invention discloses a kind of preparation method of phosphogypsum base composite thermal insulation mortar, belong to mortar and manufacture field.
Background technology
Phosphogypsum is the solid slag that produces of the chemical fertilizer such as phosphoric acid plant, detergent factory, daily use chemicals system wet-method phosphoric acid mainly, produces 1t phosphoric acid about output 4.5 ~ 5t phosphogypsum.The main component of phosphogypsum is (CaSO
42H
2o), its massfraction can reach more than 90%, is a kind of important renewable gypsum resource.In recent years along with the fast development of efficient compound fertilizer industry, the annual emissions of China's phosphogypsum is more than 5,000 ten thousand tons, although the utilization ways of phosphogypsum is more, actual utilizing status is unsatisfactory.The resource utilization rate of China's phosphogypsum is very low, is only 4.3% ~ 4.5%.Phosphogypsum is due to containing the more objectionable impurities such as phosphorus and fluorine, if discharge can cause environmental pollution arbitrarily.Build a dam and store up, not only take up an area many, investment greatly, slag costly, and high to the Geological Condition Requirement in stockyard, long-term accumulation also can cause the pollution of surface water and underground water.Therefore phosphogypsum be treated as the difficult problem of environmental protection developing association with phosphorous chemical industry.
Over nearly 10 years, energy-conserving and environment-protective become the main line of building trade development trend, and dry-mix, due to the advantage of its high quality, high-level efficiency, environmental protection, obtains fast development.Inorganic powder thermal insulation mortar is with mineral-type light heat insulation material for light skeletal, the insulating dry powder mortar that remix is made up of gelling material and other stopping composition (flyash, slag, silicon ash etc.), additive (water reducer, whipping agent etc.).Research shows that this inorganic powder thermal insulation mortar based on dry-mix is a kind of novel heat-preserving energy-saving mortar material, has energy-saving and environmental protection, heat insulating, ageing-resistant excellent properties, and cheap, has the market requirement widely.Analyze requirement and the development present situation of heat-insulating dried-powder mortar, act on the theory of environmental protection utilization of waste material, utilize solid waste phosphogypsum to prepare phosphogypsum base heat-insulating dried-powder mortar.Phosphogypsum is not gelling material, but becomes gelling material after treatment, studies the feasibility being prepared into thermal insulation mortar after it is processed into gelling material again and is significant.
Summary of the invention
The technical problem that the present invention mainly solves: there is F in current phosphogypsum base mortar, the impurity such as P, the solidifying sclerosis of cement can be caused, and insulated capacity is low, soundproof effect is poor, the drawback that production cost is high, provide a kind of preparation method of phosphogypsum base composite thermal insulation mortar, phosphogypsum is first washed by the present invention, micro-nano phosphogypsum is calcined to obtain after limestone vegetation, micro-nano phosphogypsum and limestone deposit ground-slag broken mixed powder, silicate cement compound setting accelerator is added in mixed powder, alkali-activator and methylcellulose gum obtain phosphogypsum based cementitious material, after pulverizing, add pearlstone, polystyrene foam particles and slag, polysiloxane, sclerosis, dry, after pulverizing and get final product, the present invention adds CaO in phosphogypsum can reduce titanium pigment in phosphogypsum, fluorine is to the detrimentally affect of phosphogypsum base mortar, adding pearlstone makes the heat-insulating property of phosphogypsum base thermal insulation mortar significantly improve.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A preparation method for phosphogypsum base composite thermal insulation mortar, is characterized in that concrete preparation process is:
(1) get 2 ~ 5kg phosphogypsum and put into porcelain jar, add 15 ~ 20L deionized water, stir furnishing slurry, put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, add 500 ~ 1000g unslaked lime again, after stirring, ageing 24 ~ 30h carries out pre-treatment;
(2) pretreated phosphogypsum is put into retort furnace to calcine, it is highly 2 ~ 5cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 4 ~ 5 DEG C/min, is warming up to 170 ~ 200 DEG C of insulation 2 ~ 3h, obtains micro-nano phosphogypsum after being cooled to room temperature;
(3) by after above-mentioned obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 80 ~ 90 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder;
(4) taking 1 ~ 2kg ordinary Portland cement, 400 ~ 800g compound setting accelerator, 100 ~ 200g alkali-activator and 50 ~ 80g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 30 ~ 40L distilled water, be placed on machine,massing and stir 2 ~ 5min with the rotating speed of 500 ~ 600r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material;
(5) after above-mentioned obtained phosphogypsum based cementitious material micronizer mill being pulverized, sieve and obtain 20 ~ 30 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 4 ~ 10% again, put into strong mixer and stirred with the rotating speed of 800 ~ 1000r/min;
(6) in the above-mentioned mixture stirred, add the distilled water of its volume 2 ~ 3 times, mould is poured into rapidly after stirring 5 ~ 10min with the rotating speed of 500 ~ 600r/min, final set sclerosis under normal temperature, put into baking oven, dry at 105 ~ 110 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
Described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
Described alkali-activator is calcium phosphate.
Embody rule method of the present invention is: first get the powdery thermal insulation mortar that 5 ~ 6kg the present invention obtains, add 3 ~ 4L water wherein, carry out mix and blend, stir 3 ~ 5min and make slip uniformly body of paste, and again stir after leaving standstill 3 ~ 5min and can use, should plaster from left to right, from top to bottom on base course wall when the thermal insulation mortar prepared is plastered for the 1st time, depth of plastering 8 ~ 10mm, plaster for 2nd time and should plaster after the 1st time initial set of plastering, thickness 4 ~ 6mm, the final thermal insulation layer high insulating effect formed.
The invention has the beneficial effects as follows:
(1) the present invention adds CaO and can reduce titanium pigment in phosphogypsum, fluorine to the detrimentally affect of phosphogypsum base mortar in phosphogypsum;
(2) the present invention adds pearlstone the heat-insulating property of phosphogypsum base thermal insulation mortar is significantly improved in phosphogypsum.
Embodiment
First get 2 ~ 5kg phosphogypsum and put into porcelain jar, add 15 ~ 20L deionized water, stir furnishing slurry, put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, add 500 ~ 1000g unslaked lime again, after stirring, ageing 24 ~ 30h carries out pre-treatment; Pretreated phosphogypsum is put into retort furnace calcine, it is highly 2 ~ 5cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 4 ~ 5 DEG C/min, is warming up to 170 ~ 200 DEG C of insulation 2 ~ 3h, obtains micro-nano phosphogypsum after being cooled to room temperature; After obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 80 ~ 90 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder; Taking 1 ~ 2kg ordinary Portland cement, 400 ~ 800g compound setting accelerator, 100 ~ 200g alkali-activator and 50 ~ 80g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 30 ~ 40L distilled water, be placed on machine,massing and stir 2 ~ 5min with the rotating speed of 500 ~ 600r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material; After obtained phosphogypsum based cementitious material is pulverized with micronizer mill, sieve and obtain 20 ~ 30 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 4 ~ 10% again, put into strong mixer and stirred with the rotating speed of 800 ~ 1000r/min; The distilled water of its volume 2 ~ 3 times is added in the mixture stirred, mould is poured into rapidly after stirring 5 ~ 10min with the rotating speed of 500 ~ 600r/min, final set sclerosis under normal temperature, put into baking oven, dry at 105 ~ 110 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
Described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
Described alkali-activator is calcium phosphate.
First get the powdery thermal insulation mortar that 5 ~ 6kg the present invention obtains, add 3 ~ 4L water wherein, carry out mix and blend, stir 3 ~ 5min and make slip uniformly body of paste, and again stir after leaving standstill 3 ~ 5min and can use, should plaster from left to right, from top to bottom on base course wall when the thermal insulation mortar prepared is plastered for the 1st time, depth of plastering 8 ~ 10mm, plaster for 2nd time and should plaster after the 1st time initial set of plastering, thickness 4 ~ 6mm, the final thermal insulation layer high insulating effect formed.
Example 1
First get 2kg phosphogypsum and put into porcelain jar, add 15L deionized water, stir furnishing slurry, and put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, then add 500g unslaked lime, after stirring, ageing 24h carries out pre-treatment; Pretreated phosphogypsum is put into retort furnace calcine, it is highly 2cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 4 DEG C/min, is warming up to 170 DEG C of insulation 2h, obtains micro-nano phosphogypsum after being cooled to room temperature; After obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 80 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder; Taking 1kg ordinary Portland cement, 400g compound setting accelerator, 100g alkali-activator and 50g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 30L distilled water, be placed on machine,massing and stir 2min with the rotating speed of 500r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material; After obtained phosphogypsum based cementitious material is pulverized with micronizer mill, sieve and obtain 20 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 4% again, put into strong mixer and stirred with the rotating speed of 800r/min; The distilled water of its volume 2 times is added in the mixture stirred, mould is poured into rapidly after stirring 5min with the rotating speed of 500r/min, final set sclerosis under normal temperature, put into baking oven, dry at 105 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
Described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
Described alkali-activator is calcium phosphate.
First get the powdery thermal insulation mortar that 5kg the present invention obtains, add 3L water wherein, carry out mix and blend, stir 3min and make slip uniformly body of paste, and again stir after leaving standstill 3min and can use, should plaster from left to right, from top to bottom on base course wall when the thermal insulation mortar prepared is plastered for the 1st time, depth of plastering 8mm, plaster for 2nd time and should plaster after the 1st time initial set of plastering, thickness 4mm, the final thermal insulation layer high insulating effect formed.
Example 2
First get 3.5kg phosphogypsum and put into porcelain jar, add 17L deionized water, stir furnishing slurry, and put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, then add 750g unslaked lime, after stirring, ageing 27h carries out pre-treatment; Pretreated phosphogypsum is put into retort furnace calcine, it is highly 4cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 4 DEG C/min, is warming up to 185 DEG C of insulation 2.5h, obtains micro-nano phosphogypsum after being cooled to room temperature; After obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 85 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder; Taking 1.5kg ordinary Portland cement, 600g compound setting accelerator, 150g alkali-activator and 65g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 35L distilled water, be placed on machine,massing and stir 4min with the rotating speed of 550r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material; After obtained phosphogypsum based cementitious material is pulverized with micronizer mill, sieve and obtain 25 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 7% again, put into strong mixer and stirred with the rotating speed of 900r/min; The distilled water of its volume 2.5 times is added in the mixture stirred, mould is poured into rapidly after stirring 7min with the rotating speed of 550r/min, final set sclerosis under normal temperature, put into baking oven, dry at 108 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
Described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
Described alkali-activator is calcium phosphate.
First get the powdery thermal insulation mortar that 5.5kg the present invention obtains, add 3.5L water wherein, carry out mix and blend, stir 4min and make slip uniformly body of paste, and again stir after leaving standstill 4min and can use, should plaster from left to right, from top to bottom on base course wall when the thermal insulation mortar prepared is plastered for the 1st time, depth of plastering 9mm, plaster for 2nd time and should plaster after the 1st time initial set of plastering, thickness 5mm, the final thermal insulation layer high insulating effect formed.
Example 3
First get 5kg phosphogypsum and put into porcelain jar, add 20L deionized water, stir furnishing slurry, and put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, then add 1000g unslaked lime, after stirring, ageing 30h carries out pre-treatment; Pretreated phosphogypsum is put into retort furnace calcine, it is highly 5cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 5 DEG C/min, is warming up to 200 DEG C of insulation 3h, obtains micro-nano phosphogypsum after being cooled to room temperature; After obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 90 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder; Taking 2kg ordinary Portland cement, 800g compound setting accelerator, 200g alkali-activator and 80g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 40L distilled water, be placed on machine,massing and stir 5min with the rotating speed of 600r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material; After obtained phosphogypsum based cementitious material is pulverized with micronizer mill, sieve and obtain 30 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 10% again, put into strong mixer and stirred with the rotating speed of 1000r/min; The distilled water of its volume 3 times is added in the mixture stirred, mould is poured into rapidly after stirring 10min with the rotating speed of 600r/min, final set sclerosis under normal temperature, put into baking oven, dry at 110 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
Described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
Described alkali-activator is calcium phosphate.
First get the powdery thermal insulation mortar that 6kg the present invention obtains, add 4L water wherein, carry out mix and blend, stir 5min and make slip uniformly body of paste, and again stir after leaving standstill 5min and can use, should plaster from left to right, from top to bottom on base course wall when the thermal insulation mortar prepared is plastered for the 1st time, depth of plastering 10mm, plaster for 2nd time and should plaster after the 1st time initial set of plastering, thickness 6mm, the final thermal insulation layer high insulating effect formed.
Claims (3)
1. a preparation method for phosphogypsum base composite thermal insulation mortar, is characterized in that concrete preparation process is:
(1) get 2 ~ 5kg phosphogypsum and put into porcelain jar, add 15 ~ 20L deionized water, stir furnishing slurry, put into water extracter afterwards and remove moisture removal phosphogypsum soluble impurity, add 500 ~ 1000g unslaked lime again, after stirring, ageing 24 ~ 30h carries out pre-treatment;
(2) pretreated phosphogypsum is put into retort furnace to calcine, it is highly 2 ~ 5cm that the bed of material is stacked, and carry out gradient increased temperature, temperature rise rate is 4 ~ 5 DEG C/min, is warming up to 170 ~ 200 DEG C of insulation 2 ~ 3h, obtains micro-nano phosphogypsum after being cooled to room temperature;
(3) by after above-mentioned obtained micro-nano phosphogypsum Vacuumdrier drying, in mass ratio for 70:30 takes after micro-nano phosphogypsum and limestone slag mix, put into dry ball to pulverize, cross 80 ~ 90 mesh sieves afterwards, obtain phosphogypsum and limestone slag mixed powder;
(4) taking 1 ~ 2kg ordinary Portland cement, 400 ~ 800g compound setting accelerator, 100 ~ 200g alkali-activator and 50 ~ 80g methyl cellulose ether joins in above-mentioned obtained phosphogypsum and limestone slag mixed powder, add 30 ~ 40L distilled water, be placed on machine,massing and stir 2 ~ 5min with the rotating speed of 500 ~ 600r/min, pour into rapidly in mould, the demoulding after its final set sclerosis, and vacuum-drying, obtain phosphogypsum based cementitious material;
(5) after above-mentioned obtained phosphogypsum based cementitious material micronizer mill being pulverized, sieve and obtain 20 ~ 30 object particles, using the gelling material of this gel particles as thermal insulation mortar, by volume for 2:3:5 adds pearlstone, polystyrene foam particles and slag as aglite, add the polysiloxane hydrophober of aggregate total mass 4 ~ 10% again, put into strong mixer and stirred with the rotating speed of 800 ~ 1000r/min;
(6) in the above-mentioned mixture stirred, add the distilled water of its volume 2 ~ 3 times, mould is poured into rapidly after stirring 5 ~ 10min with the rotating speed of 500 ~ 600r/min, final set sclerosis under normal temperature, put into baking oven, dry at 105 ~ 110 DEG C, and after pulverizing with micronizer mill, cross 50 ~ 60 order steel sieves, obtain a kind of phosphogypsum base composite thermal insulation mortar.
2. a kind of phosphogypsum base composite thermal insulation mortar according to claim 1, is characterized in that: described compound setting accelerator is that water glass and potassium silicate obtain for 1:1 mixes in mass ratio.
3. a kind of phosphogypsum base composite thermal insulation mortar according to claim 1, is characterized in that: described alkali-activator is calcium phosphate.
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| CN106517978A (en) * | 2016-10-31 | 2017-03-22 | 同济大学 | Light-weight thermal mortar taking ardealite hydraulic compound gel material as principal material |
| CN106738313A (en) * | 2016-11-29 | 2017-05-31 | 中国建筑科学研究院建筑机械化研究分院 | The method that light thermal-insulating component is prepared using aglite |
| CN108298887A (en) * | 2018-05-04 | 2018-07-20 | 合肥天沃能源科技有限公司 | A kind of energy-saving heat preserving mortar and preparation method thereof |
| CN109020449A (en) * | 2018-09-25 | 2018-12-18 | 马鞍山十七冶工程科技有限责任公司 | A kind of jet printing type ardealite base fireproof mortar and its preparation method and application of stalk fibre enhancing |
| CN110158849A (en) * | 2016-02-24 | 2019-08-23 | 张日龙 | A kind of building block |
| CN110499852A (en) * | 2019-08-01 | 2019-11-26 | 肖法刚 | A kind of construction method of efficient quick integral forming energy-saving wall |
| CN113061008A (en) * | 2021-03-18 | 2021-07-02 | 贵州宇昆湿拌砂浆环保建材有限公司 | Phosphogypsum wet-mixed mortar for load-bearing structure and preparation method thereof |
| CN116693321A (en) * | 2023-04-13 | 2023-09-05 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110158849A (en) * | 2016-02-24 | 2019-08-23 | 张日龙 | A kind of building block |
| CN106517978A (en) * | 2016-10-31 | 2017-03-22 | 同济大学 | Light-weight thermal mortar taking ardealite hydraulic compound gel material as principal material |
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| CN109020449A (en) * | 2018-09-25 | 2018-12-18 | 马鞍山十七冶工程科技有限责任公司 | A kind of jet printing type ardealite base fireproof mortar and its preparation method and application of stalk fibre enhancing |
| CN110499852A (en) * | 2019-08-01 | 2019-11-26 | 肖法刚 | A kind of construction method of efficient quick integral forming energy-saving wall |
| CN113061008A (en) * | 2021-03-18 | 2021-07-02 | 贵州宇昆湿拌砂浆环保建材有限公司 | Phosphogypsum wet-mixed mortar for load-bearing structure and preparation method thereof |
| CN116693321A (en) * | 2023-04-13 | 2023-09-05 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
| CN116693321B (en) * | 2023-04-13 | 2024-05-10 | 重庆交通大学 | Preparation method of modified phosphogypsum-based self-leveling mortar |
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Application publication date: 20151125 |