CN109734411B - Preparation method of water-resistant magnesium-based cementing material - Google Patents
Preparation method of water-resistant magnesium-based cementing material Download PDFInfo
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- CN109734411B CN109734411B CN201910150648.XA CN201910150648A CN109734411B CN 109734411 B CN109734411 B CN 109734411B CN 201910150648 A CN201910150648 A CN 201910150648A CN 109734411 B CN109734411 B CN 109734411B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 23
- 239000011777 magnesium Substances 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000002699 waste material Substances 0.000 claims abstract description 46
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 44
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 34
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 17
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920005591 polysilicon Polymers 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000003607 modifier Substances 0.000 abstract description 6
- 239000004566 building material Substances 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 26
- 238000005452 bending Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- CENHPXAQKISCGD-UHFFFAOYSA-N trioxathietane 4,4-dioxide Chemical compound O=S1(=O)OOO1 CENHPXAQKISCGD-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明涉及一种镁基胶凝材料的制备方法，具体步骤为：按重量将废盐酸溶液加入到硫酸镁溶液中搅拌均匀，然后加入氧化镁和多晶硅废渣搅拌制成浆料，然后浇筑成型制成水泥制品。本发明利用废盐酸、多晶硅废渣作为改性剂制备镁水泥，能够明显改善材料的耐水性。本方法工艺简单，解决了镁水泥耐水性差的缺点，能够降低建材企业的生产成本；同时，实现了废盐酸和多晶硅废渣的资源化利用，降低了对环境的污染和治理成本。
The invention relates to a method for preparing a magnesium-based cementitious material. The specific steps are as follows: adding a waste hydrochloric acid solution into a magnesium sulfate solution by weight and stirring evenly, then adding magnesium oxide and polysilicon waste residue and stirring to form a slurry, and then pouring and molding to make a slurry. into cement products. The invention utilizes waste hydrochloric acid and polysilicon waste residue as modifiers to prepare magnesium cement, which can obviously improve the water resistance of the material. The method is simple in process, solves the disadvantage of poor water resistance of magnesium cement, and can reduce the production cost of building materials enterprises; meanwhile, the resource utilization of waste hydrochloric acid and polysilicon waste residue is realized, and environmental pollution and treatment costs are reduced.
Description
Technical Field
The invention relates to a preparation method of a water-resistant magnesium-based cementing material, in particular to a method for improving the water resistance of a magnesium-based cement building material by using waste hydrochloric acid and polycrystalline silicon waste residues as modifiers.
Background
The magnesium cement product has the advantages of high volume stability, light weight, fire resistance, low alkalinity, good decoration effect, no moisture absorption and halogen reversion, small corrosion effect on reinforcing steel bars and the like, and has more advantages in manufacturing decoration and finishing materials. But the water resistance is poor, thereby limiting the application. Therefore, research and development of a water-resistant magnesium-based cement is imperative. In order to solve the problem of poor water resistance of the magnesium cement, the addition of the admixture becomes a relatively extensive method for the present research.
The polycrystalline silicon waste residue is solid waste generated in the process of producing polycrystalline silicon, at present, domestic polycrystalline baby waste residue is mainly treated in a stacking and simple landfill mode, not only occupies a large amount of land, but also has certain toxicity, if the polycrystalline baby waste residue cannot be reasonably treated and safely utilized in time, environmental pollution and resource waste are caused, and the problem becomes very troublesome for polycrystalline silicon production enterprises. Hydrochloric acid is a common chemical raw material, is widely applied to the acid cleaning production of chemical industry, steel, electroplating and steel structural members, and generates a large amount of hydrochloric acid-containing wastewater every year. The invention uses waste hydrochloric acid and polysilicon waste residue as modifier, solves the problem of poor water resistance of magnesium cement, and makes the best use of industrial waste residue which is difficult to treat.
Disclosure of Invention
The invention provides a preparation method of a water-resistant magnesium-based cementing material, which takes waste hydrochloric acid and polycrystalline silicon waste residue as a composite modifier, is used for production and application of a magnesium cement building material, and improves the water resistance of a product.
A preparation method of a water-resistant magnesium-based cementing material comprises the following specific steps: preparing magnesium sulfate solution, adding the waste hydrochloric acid solution into the magnesium sulfate solution according to the weight, uniformly stirring, adding the polycrystalline silicon waste residue, uniformly stirring, fully reacting, adding magnesium oxide to prepare slurry, and pouring and forming to prepare the magnesium cement product.
In the method, the ratio of the waste hydrochloric acid to the waste polycrystalline silicon slag to the magnesium sulfate to the magnesium oxide is 1 (1.3-3.9): 53.8: 74.6.
In the method, the concentration of the waste acid is 10-30%.
In the method, the polycrystalline silicon waste residue is waste residue generated in the production process of polycrystalline silicon, and the main chemical composition of the polycrystalline silicon waste residue is SiO215 to 30% of Al2O31-5%, CaO 15-35%, and Cl 3-15%.
The invention has the beneficial effects that: the invention utilizes waste hydrochloric acid and polysilicon waste residue as modifiers to prepare the water-resistant magnesium-based cementing material. In the system of the invention, the modifier can improve the hydration product composition and the hydration product crystal morphology of the magnesium-based binding material, the flake hydration product with smaller size (shown in figure 1) is converted into the thick rod or needle rod hydration product with larger size (shown in figure 2), the porosity of the hardened body is reduced, the compactness is improved, and the water resistance of the material is improved by the synergistic effect of the composition and the morphology of the hydration product. The method has simple process, solves the defect of poor water resistance of the magnesium cement, and reduces the production cost of magnesium cement building material enterprises; meanwhile, the resource utilization of the waste hydrochloric acid and the waste polysilicon residue is realized, and the environmental pollution and the treatment cost are reduced.
Drawings
FIG. 1 is an electron microscope picture (20000 times magnification) of a hydration product of ordinary magnesium oxysulfate cement;
FIG. 2 is an electron micrograph (magnification 20000 times) of a hydrated product of a magnesium-based cement based on the present invention.
Detailed Description
The present invention will be described in detail with reference to examples. The test methods of the examples and comparative examples according to the invention are carried out according to the standard GB/T1761-1999 method for testing the strength of cementitious sands. The main chemical composition of the waste residue of the polysilicon is SiO216.6% of Al2O33.8%, CaO 28.9%, and Cl 14.3%.
Comparative example 1
Weighing 720 parts of magnesium sulfate solution (28 Baume degrees), mixing with 1000 parts of magnesium oxide, stirring to form uniform slurry, injecting into a triple die, demoulding after 24h, and curing for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
Comparative example No. two
720 parts of magnesium sulfate solution (28 Baume degree) and 4 parts of hydrochloric acid (concentration is 20%) are weighed and mixed uniformly, then the mixture and 1000 parts of magnesium oxide are mixed and stirred to form uniform slurry, the slurry is injected into a triple die, the die is removed after 24 hours, and the slurry is cured for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
Comparative example No. three
Weighing 720 parts of magnesium sulfate solution (28 Baume degrees), mixing and stirring the 720 parts of magnesium sulfate solution and 1040 parts of dry materials (1000 parts of magnesium oxide and 40 parts of anhydrous calcium chloride) to form uniform slurry, injecting the slurry into a triple die, demoulding after 24 hours, and curing for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
Comparative example No. four
Weighing 720 parts of magnesium sulfate solution (28 Baume degrees), mixing and stirring the magnesium sulfate solution and 1040 parts of dry materials (1000 parts of magnesium oxide and 40 parts of polycrystalline silicon waste residues) to form uniform slurry, injecting the slurry into a triple die, demoulding after 24 hours, and curing for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
Example one
Weighing 19.7 parts of waste hydrochloric acid (with the concentration of 13.8%) and adding the waste hydrochloric acid into 720 parts of magnesium sulfate solution (with the concentration of 28 Baume degree) to be uniformly stirred, adding 27 parts of polycrystalline silicon waste residue to be uniformly stirred, adding 1000 parts of magnesium oxide after full reaction, mixing and stirring to form uniform slurry, injecting the slurry into a triple die, demoulding after 24 hours, and curing for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
Example two
Weighing 26.8 parts of waste hydrochloric acid (with the concentration of 21.4%) and adding the waste hydrochloric acid into 720 parts of magnesium sulfate solution (with the Baume degree of 28) to be uniformly stirred, adding 34.8 parts of polycrystalline silicon waste residue to be uniformly stirred, adding 1000 parts of magnesium oxide after full reaction, mixing and stirring the mixture to form uniform slurry, injecting the slurry into a triple die, demoulding after 24 hours, and curing for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
EXAMPLE III
Weighing 32.9 parts of waste hydrochloric acid (with the concentration of 28.6 percent), adding the waste hydrochloric acid into 720 parts of magnesium sulfate solution (with the concentration of 28 Baume degrees), uniformly stirring, adding 45 parts of polycrystalline silicon waste residues, uniformly stirring, adding 1000 parts of magnesium oxide after full reaction, mixing and stirring to form uniform slurry, injecting the slurry into a triple die, demolding after 24 hours, and maintaining for 7 days under natural conditions. Drying the test blocks, and testing the bending strength and the compressive strength; and the other group of test blocks are soaked in water for 7 days, and then flexural strength and compressive strength are tested.
TABLE 1 test results
Note: in the first to fourth comparative examples, the dry test block was exposed to water and the test block was cracked into a net shape (individual test block was broken into several sections), and the water-exposed strength data could not be measured.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819149A (en) * | 2014-02-28 | 2014-05-28 | 河南理工大学 | Non-burnt brick prepared from mono/polycrystalline silicon cutting wastes as main raw material |
| CN104591666A (en) * | 2015-01-14 | 2015-05-06 | 东南大学 | Resourceful treatment method for waste polycrystalline-silicon residues |
| KR101580537B1 (en) * | 2015-08-12 | 2015-12-29 | 한밭대학교 산학협력단 | Non cement lightweight panel using polysilicon sludge |
| CN105967738A (en) * | 2016-05-11 | 2016-09-28 | 东南大学 | Lightweight porous green building material produced by utilizing polycrystalline silicon waste residue, and preparation method of lightweight porous green building material |
| CN107473614A (en) * | 2017-09-27 | 2017-12-15 | 江苏蓝圈新材料股份有限公司 | A kind of anti-folding magnesium oxysulfide inorganic coagulation material of water-fast height |
| CN108218271A (en) * | 2018-01-30 | 2018-06-29 | 徐州中联混凝土有限公司 | A kind of preparation method of the siliceous cement raw material of high hydration activity |
| CN108275898A (en) * | 2018-03-13 | 2018-07-13 | 青海大学 | A kind of magnesia oxychloride cement and preparation method thereof of SILICA FUME filling |
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- 2019-02-28 CN CN201910150648.XA patent/CN109734411B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819149A (en) * | 2014-02-28 | 2014-05-28 | 河南理工大学 | Non-burnt brick prepared from mono/polycrystalline silicon cutting wastes as main raw material |
| CN104591666A (en) * | 2015-01-14 | 2015-05-06 | 东南大学 | Resourceful treatment method for waste polycrystalline-silicon residues |
| KR101580537B1 (en) * | 2015-08-12 | 2015-12-29 | 한밭대학교 산학협력단 | Non cement lightweight panel using polysilicon sludge |
| CN105967738A (en) * | 2016-05-11 | 2016-09-28 | 东南大学 | Lightweight porous green building material produced by utilizing polycrystalline silicon waste residue, and preparation method of lightweight porous green building material |
| CN107473614A (en) * | 2017-09-27 | 2017-12-15 | 江苏蓝圈新材料股份有限公司 | A kind of anti-folding magnesium oxysulfide inorganic coagulation material of water-fast height |
| CN108218271A (en) * | 2018-01-30 | 2018-06-29 | 徐州中联混凝土有限公司 | A kind of preparation method of the siliceous cement raw material of high hydration activity |
| CN108275898A (en) * | 2018-03-13 | 2018-07-13 | 青海大学 | A kind of magnesia oxychloride cement and preparation method thereof of SILICA FUME filling |
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