CN114292041A - Preparation method of cementing material based on phosphorus tailings - Google Patents
Preparation method of cementing material based on phosphorus tailings Download PDFInfo
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- CN114292041A CN114292041A CN202111329905.XA CN202111329905A CN114292041A CN 114292041 A CN114292041 A CN 114292041A CN 202111329905 A CN202111329905 A CN 202111329905A CN 114292041 A CN114292041 A CN 114292041A
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- tailings
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- phosphate
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 239000011574 phosphorus Substances 0.000 title claims abstract description 39
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 39
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 36
- 239000010452 phosphate Substances 0.000 claims abstract description 36
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000001354 calcination Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 24
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 15
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 15
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 10
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 3
- 150000007524 organic acids Chemical group 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 239000011777 magnesium Substances 0.000 abstract description 2
- 229910052749 magnesium Inorganic materials 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 239000002367 phosphate rock Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000004566 building material Substances 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002686 phosphate fertilizer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Abstract
The invention relates to the technical field of solid waste recycling, and discloses a preparation method of a cementing material based on phosphorus tailings, which comprises the following steps of; s1, drying: drying the phosphate tailings at the temperature of 105 ℃ for 2-3 hours; s2, crushing: after the drying of the phosphorus tailings is finished, sieving the dried phosphorus tailings by a 200-mesh sieve or crushing the phosphorus tailings to be less than 0.074mm to obtain fine powder; s3, calcining: and after the crushing is finished, placing the obtained fine powder into a high-temperature calcining kiln for sintering. According to the preparation method of the cementing material based on the phosphorus tailings, the characteristics of the calcium cement and the magnesium cement are integrated according to the chemical components of the phosphorus tailings, the composite magnesium-calcium cement is invented, the beneficial components of wastes are utilized, the cost is low, and the industrial innovation effect is realized. The product has the advantages of low cost, excellent performance, low energy consumption, convenient production and the like, and can be widely applied to the field of engineering construction.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a preparation method of a cementing material based on phosphorus tailings.
Background
The cementing material is a material which can change into a hard solid from a slurry under the physical and chemical actions and has the cementing property, and other granular or blocky materials are bonded into a whole through the cementing property. The most representative inorganic cementing material belongs to cement, the requirement of national infrastructure on the cementing material is increased along with the development of social economy, the cement consumed in China in 2013 accounts for 60% of the total global amount, a large number of stone hills are exploited, local vegetation and ecology are damaged, and certain influence is brought to the environment and greening.
The phosphate rock tailings are mined from raw phosphate rock ores, the grade of the mined phosphate rock ores generally cannot meet the requirement of producing wet-process phosphoric acid, ore dressing is needed, phosphate rock after ore dressing is divided into two parts, one part is phosphate concentrate which is used for producing products such as phosphoric acid and ammonium phosphate, the other part is phosphate rock tailings, and the tailings are generally stacked in a phosphate tailing pond due to low grade. Therefore, the phosphate tailings are used as one of solid wastes and have even small pollution; the method adopts a stockpiling mode for treatment, occupies a large amount of land, and has certain safety and stability problems when the stockpiling is too high. Therefore, the method considers waste utilization and is also beneficial to the healthy development of related industries; the comprehensive utilization of the phosphorus tailings mainly comprises the following channels: as building materials, such as bricks.
The phosphorus tailings are used as building materials, because the phosphorus tailings have too fine particles and too large specific surface area, a large amount of solidified materials are required to be consumed, and the finally produced building materials have lower strength. Meanwhile, the building material has low added value and small sale radius. Finally, the phosphate tailings also contain fluoride and trace radioactive substances, which are harmful to human bodies.
Secondly, the re-extraction of useful resources in the phosphate tailings is actually limited by the process technology, the development of the basic science of inorganic chemistry at present is quite complete, and the process purification technology is difficult to be greatly improved on the basis, and the extraction cost of the phosphate tailings with the highest grade is difficult to be in direct proportion to the final benefit.
The invention aims to promote the comprehensive utilization of resources, strengthen the treatment, promote the efficient, high-quality, high-value and large-scale utilization of solid wastes and assist the ecological civilized construction. The method aims to completely consume the phosphate tailing heap and ensure the initial appearance of the yard. Meanwhile, the damage of ecological environment caused by the production of similar products is reduced.
Aiming at the defects in the prior art, the invention adopts deep development, consumes the phosphate tailings in a mode of preparing the cementing material, improves the added value of the product and improves the serviceable radius of the product; meanwhile, the method has wider application range and application scene; in addition, the method has the advantages of low cost, excellent performance, low energy consumption, convenient production and the like in similar products, and promotes the comprehensive utilization of solid wastes.
Disclosure of Invention
Technical problem to be solved
The invention provides a preparation method of a cementing material based on phosphorus tailings, which has the advantages of reducing environmental and safety risks, realizing industrial innovation and the like, and solves the problems in the background art.
(II) technical scheme
The invention provides the following technical scheme: a preparation method of a gelled material based on phosphorus tailings comprises the following steps;
s1, drying: drying the phosphate tailings at the temperature of 105 ℃ for 2-3 hours;
s2, crushing: after the drying of the phosphorus tailings is finished, sieving the dried phosphorus tailings by a 200-mesh sieve or crushing the phosphorus tailings to be less than 0.074mm to obtain fine powder;
s3, calcining: after the crushing is finished, placing the obtained fine powder in a high-temperature calcining kiln for calcining to obtain offwhite powder;
s4, mixing: and then fully stirring the calcined phosphorus tailing powder and other auxiliary materials according to a proportion to uniformly mix the mixture to obtain mixed powder, namely preparing the cementing material based on the phosphorus tailing.
Preferably, in S4, the cement is composed of phosphate tailings, magnesium chloride, magnesium sulfate, magnesium oxide, and retarder.
Preferably, in S3, the calcination temperature of the phosphate tailings is 700 +/-50 ℃, the calcination time is not less than 5 hours, and the chemical composition of the phosphate tailings is checked by XRD after the calcination is finished, so that the composition ratios of magnesium oxide, calcium oxide and silicon dioxide are determined;
the content of magnesium oxide in the fired product is not less than 15%, the content of calcium oxide is not less than 20%, and the content of silicon dioxide is not less than 18%;
the dry mass ratio of the fired phosphate tailings in the whole is 28-60%.
Preferably, the magnesium chloride is magnesium chloride powder, the purity is not lower than 80%, and the dry mass of the magnesium chloride powder in the whole is 5-17%;
the magnesium sulfate is powder, the purity of the magnesium sulfate is not lower than 90%, and the dry mass ratio of the magnesium sulfate in the whole is 8-22%.
Preferably, the magnesium oxide is dead-burned magnesium oxide powder, the purity is not lower than 80%, and the dry mass ratio in the whole formula is 12-33%;
the retarder is organic acid, soluble salt or alkaline phosphate thereof, protein and the like, and the dry mass of the retarder in the whole is 0.1-1%.
(III) advantageous effects
The invention has the following beneficial effects:
1. according to the preparation method of the cementing material based on the phosphorus tailings, the characteristics of the calcium cement and the magnesium cement are integrated according to the chemical components of the phosphorus tailings, the composite magnesium-calcium cement is invented, the beneficial components of wastes are utilized, the cost is low, and the industrial innovation effect is realized. The product has the advantages of low cost, excellent performance, low energy consumption, convenient production and the like, and can be widely applied to the field of engineering construction.
2. The preparation method of the gelled material based on the phosphate tailings solves the problems of land pressure and stockpiling cost of tailing stockpiling of phosphate fertilizer enterprises, reduces environment and safety risks, increases economic benefits, consumes the phosphate tailing heap, and reduces the damage of ecological environment caused by similar product production with an initial appearance of a stockyard.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for preparing a gelled material based on phosphate tailings comprises the following steps;
s1, drying: drying the phosphate tailings at the temperature of 105 ℃ for 2-3 hours;
s2, crushing: after the drying of the phosphorus tailings is finished, sieving the dried phosphorus tailings by a 200-mesh sieve or crushing the phosphorus tailings to be less than 0.074mm to obtain fine powder;
s3, calcining: after the crushing is finished, placing the obtained fine powder in a high-temperature calcining kiln for calcining to obtain offwhite powder;
s4, mixing: and then fully stirring the calcined phosphorus tailing powder and other auxiliary materials according to a proportion to uniformly mix the mixture to obtain mixed powder, namely preparing the cementing material based on the phosphorus tailing.
Further, in the step S4, the cementing material is composed of phosphate tailings, magnesium chloride, magnesium sulfate, magnesium oxide and a retarder which are sintered into powder.
Further, in the step S3, the calcination temperature of the phosphate tailings is 700 +/-50 ℃, the calcination time is not less than 5 hours, and the chemical composition of the phosphate tailings is checked by XRD after the calcination is finished, so that the composition ratios of magnesium oxide, calcium oxide and silicon dioxide are determined; the content of magnesium oxide in the fired product is not less than 15%, the content of calcium oxide is not less than 20%, and the content of silicon dioxide is not less than 18%; the dry mass ratio of the fired phosphate tailings in the whole is 28-60%; the magnesium chloride is magnesium chloride powder, the purity is not lower than 80%, and the dry mass of the magnesium chloride powder in the whole is 5-17%; the magnesium sulfate is powder, the purity is not lower than 90%, and the dry mass ratio in the whole is 8-22%; the magnesium oxide is dead-burned magnesium oxide powder, the purity is not lower than 80%, and the dry mass ratio in the whole formula is 12-33%; the retarder is organic acid, soluble salt or alkaline phosphate thereof, protein and the like, and the dry mass of the retarder in the whole is 0.1-1%.
After the proportioning is finished, adding water into the cementing material according to the water-cement ratio of 0.1-0.25, stirring to form a phosphorus tailing cementing material semifluid with plasticity, and after the proportioning is finished, using commercially available No. 425 ordinary portland cement as a control group, wherein the water-cement ratio is 0.5, and the sand-cement ratio is 1: 3, cement mortar is prepared, and the sand meets the relevant regulations in the GB/T14684-2011 construction sand standard.
After the phosphorus tailing slurry and the cement mortar are configured, the phosphorus tailing slurry and the cement mortar are respectively poured into a forming die with the thickness of 70.7 x 70.7mm and are vibrated to be dense, and 6 test blocks are prepared for each group and are respectively used for testing the strength of 7d and 28 d.
Demoulding after 24h of maintenance, indoor maintenance is carried out at normal temperature to the corresponding age, then a cement compression and bending integrated testing machine is used for testing the compression strength of two groups of test blocks 7d and 28d at the ballast rate of 200N/s, each age is tested for three times, the final data is the average value of the three results, and the test results are tabulated:
according to the invention, the strength properties of the phosphate tailing cementing material are compared with those of a cement control group, so that the cementing material of the phosphate tailing can be obtained, compared with a common silicate cement material, the 7d strength and the 28d strength of the cementing material are obviously improved, the phosphate tailing cementing material can be used as a high-strength cementing material to be applied to the construction industry and the manufacturing industry instead of cement, and meanwhile, in the step of testing the mixing ratio of raw materials of the construction engineering, a proper water-cement ratio is determined, so that the product strength can be greatly improved and the water resistance can be improved by using the material. Along with the increase of the strength, the curing effect on the pollutants in the raw materials is also realized.
The invention consumes the solid waste-phosphorus tailings, effectively reduces the cost of the cementing material and simultaneously improves the competitiveness of the product; the method solves the environmental problem caused by the stacking of the phosphate tailings and the safety problem caused by the stacking of the phosphate tailings, solves the sustainable development crisis of phosphate fertilizer enterprises, and simultaneously changes waste into valuable, thereby improving the efficiency of the enterprises and simultaneously solving the stacking cost of the enterprises.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The preparation method of the gelled material based on the phosphorus tailings is characterized by comprising the following steps;
s1, drying: drying the phosphate tailings at the temperature of 105 ℃ for 2-3 hours;
s2, crushing: after the drying of the phosphorus tailings is finished, sieving the dried phosphorus tailings by a 200-mesh sieve or crushing the phosphorus tailings to be less than 0.074mm to obtain fine powder;
s3, calcining: after the crushing is finished, placing the obtained fine powder in a high-temperature calcining kiln for calcining to obtain offwhite powder;
s4, mixing: and then fully stirring the calcined phosphorus tailing powder and other auxiliary materials according to a proportion to uniformly mix the mixture to obtain mixed powder, namely preparing the cementing material based on the phosphorus tailing.
2. The method for preparing the gelled material based on the phosphate tailings as claimed in claim 1, wherein the method comprises the following steps: in the S4, the cementing material is composed of phosphorus tailings of sintered powder, magnesium chloride, magnesium sulfate, magnesium oxide and retarder.
3. The method for preparing the gelled material based on the phosphate tailings as claimed in claim 2, wherein the method comprises the following steps: in the S3, the calcination temperature of the phosphorus tailings is 700 +/-50 ℃, the calcination time is not less than 5 hours, and the chemical composition of the phosphorus tailings is detected by XRD after the calcination is finished, so that the composition ratios of magnesium oxide, calcium oxide and silicon dioxide are determined;
the content of magnesium oxide in the fired product is not less than 15%, the content of calcium oxide is not less than 20%, and the content of silicon dioxide is not less than 18%;
the dry mass ratio of the fired phosphate tailings in the whole is 28-60%.
4. The method for preparing the gelled material based on the phosphate tailings, as claimed in claim 3, wherein the method comprises the following steps: the magnesium chloride is magnesium chloride powder, the purity is not lower than 80%, and the dry mass of the magnesium chloride powder in the whole is 5-17%;
the magnesium sulfate is powder, the purity of the magnesium sulfate is not lower than 90%, and the dry mass ratio of the magnesium sulfate in the whole is 8-22%.
5. The method for preparing the gelled material based on the phosphate tailings, as claimed in claim 3, wherein the method comprises the following steps: the magnesium oxide is dead-burned magnesium oxide powder, the purity is not lower than 80%, and the dry mass ratio in the whole formula is 12-33%;
the retarder is organic acid, soluble salt or alkaline phosphate thereof, protein and the like, and the dry mass of the retarder in the whole is 0.1-1%.
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| CN202111329905.XA CN114292041A (en) | 2021-11-11 | 2021-11-11 | Preparation method of cementing material based on phosphorus tailings |
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| CN202111329905.XA CN114292041A (en) | 2021-11-11 | 2021-11-11 | Preparation method of cementing material based on phosphorus tailings |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403347A (en) * | 2022-07-21 | 2022-11-29 | 湖北省长江资源循环利用及装备创新中心有限公司 | Preparation method of roadbed early-strength cementing material |
| CN115921515A (en) * | 2022-11-09 | 2023-04-07 | 武汉轻工大学 | Curing treatment method for heavy metal contaminated soil |
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| CN103569984A (en) * | 2013-11-26 | 2014-02-12 | 武汉工程大学 | Method for comprehensively utilizing reverse-flotation phosphorite tailings |
| CN109081666A (en) * | 2018-07-17 | 2018-12-25 | 枞阳县天筑新型建筑材料有限公司 | A method of freeze proof wear-resistant baking-free brick is prepared with bloodstone tailing-slag-phosphorus CHARACTERISTICS OF TAILINGS SAND |
| CN110526628A (en) * | 2018-05-23 | 2019-12-03 | 湖北工业大学 | A kind of preparation method of large dosage wet-milling phosphorus solid waste extra retarded set cementitious material |
| CN110606722A (en) * | 2019-09-30 | 2019-12-24 | 武汉工程大学 | Building wallboard and preparation method thereof |
| CN112551922A (en) * | 2020-12-25 | 2021-03-26 | 武汉理工大学 | Comprehensive resource utilization method of phosphorus tailings waste residues and carbide slag |
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2021
- 2021-11-11 CN CN202111329905.XA patent/CN114292041A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103569984A (en) * | 2013-11-26 | 2014-02-12 | 武汉工程大学 | Method for comprehensively utilizing reverse-flotation phosphorite tailings |
| CN110526628A (en) * | 2018-05-23 | 2019-12-03 | 湖北工业大学 | A kind of preparation method of large dosage wet-milling phosphorus solid waste extra retarded set cementitious material |
| CN109081666A (en) * | 2018-07-17 | 2018-12-25 | 枞阳县天筑新型建筑材料有限公司 | A method of freeze proof wear-resistant baking-free brick is prepared with bloodstone tailing-slag-phosphorus CHARACTERISTICS OF TAILINGS SAND |
| CN110606722A (en) * | 2019-09-30 | 2019-12-24 | 武汉工程大学 | Building wallboard and preparation method thereof |
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| CN115403347A (en) * | 2022-07-21 | 2022-11-29 | 湖北省长江资源循环利用及装备创新中心有限公司 | Preparation method of roadbed early-strength cementing material |
| CN115921515A (en) * | 2022-11-09 | 2023-04-07 | 武汉轻工大学 | Curing treatment method for heavy metal contaminated soil |
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Application publication date: 20220408 |