CN105314910A - Preparation method of phosphorus slag compound modifier - Google Patents
Preparation method of phosphorus slag compound modifier Download PDFInfo
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- CN105314910A CN105314910A CN201510857918.2A CN201510857918A CN105314910A CN 105314910 A CN105314910 A CN 105314910A CN 201510857918 A CN201510857918 A CN 201510857918A CN 105314910 A CN105314910 A CN 105314910A
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- China
- Prior art keywords
- phosphorus slag
- slag
- phosphorus
- black liquor
- modifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a preparation method of a phosphorus slag compound modifier, belonging to the field of comprehensive utilization of solid wastes. The invention provides a phosphorus slag compound modifier which takes straw pulp alkaline papermaking black liquid and fly ash as main components, is used for phosphorus slag modification and is low in cost. Carbide slag and black liquid in the modifier can form a strongly alkaline excitation environment to the phosphorus slag, thereby being favorable for inhibiting delayed coagulation caused by P2O5. Activated SiO2 in the fly ash provides a nucleating point for hydration of cement clinker and also improves the effective water cement ratio, thereby further increasing the hydration speed of the clinker and promoting the increase of the early strength. The phenomenon of low-temperature delayed coagulation of the modified phosphorus slag micro-powder is effectively inhibited, and the doping proportion of the phosphorus slag in concrete as well as the early strength, impermeability and freezing resistance of the corresponding concrete product can be obviously improved.
Description
Technical field
The invention belongs to field of solid waste comprehensive utilization, be specifically related to a kind of preparation method of phosphorus slag composite modifier.
Background technology
Phosphorus slag is the industrial by-products of discharging after producing yellow phosphorus with Rock Phosphate (72Min BPL), belongs to II class solid waste in " general industrial solid waste ".Often produce one ton of yellow phosphorus meeting by-product phosphorus slag 8 ~ 10 tons, the annual about by-product phosphorus slag 500 ~ 6,000,000 tons of current China sulphur dioxide of phosphor chemical industry.A large amount of phosphorus slags while causing land seizure problem due to phosphorus slag in containing certain soluble ingredient, can soil be infiltrated in banking process, also can cause environmental pollution.Phosphorus slag is mainly used as building materials raw material for the production of the building materials such as cement, concrete, and adding of it can reduce its hydration heat, improves concrete splitting resistance, improve pore ratio etc., final intensity and the impermeability improving gelling material.But owing to often containing some acid P in phosphorus slag composition
2o
5, mix after in the gelling material such as cement, concrete and can cause slow setting problem at low ambient temperatures, and cause the problems such as the low and intensity reduction of incorporation thus, largely, have impact on the comprehensive utilization of phosphorus slag.
For avoiding the generation of the problems referred to above, people take multiple method and solve the problem of the low and slow setting of phosphorus slag incorporation in gelling material or find new approach to expand phosphorus slag usage quantity.Vitriol properties-correcting agent by mixing 2 ~ 8% in phosphorous slag micropowder in patent " a kind of modified phosphorous slag micro mist and application-201210571526.6 thereof ", makes the incorporation of phosphorus slag in cement reach 30%, and strength of cement keeps substantially simultaneously.Solved the slow setting problem of phosphorus slag in patent " phosphorous slag activation modifier-02114132.0 " by one or more in the oxide compound of apolegamy calcium, magnesium, barium, oxyhydroxide, muriate, nitrate, improve the usage quantity in concrete.By phosphorus slag and manganese slag, aluminium slag, slag being mixed with and obtaining High-activity composite micro powder in patent " a kind of High-activity composite micro powder and production method and purposes-201210155442.4 ", the consumption in concrete can more than 40%.Aforesaid method to some extent solves the slow setting problem of phosphorus slag, but the problem that in above-mentioned formula, part raw materials cost is higher causes these methods not have large-scale promotion at present, after entering winter, the demand of phosphorus slag powder greatly reduces, and the slow setting problem still needing the various low-cost resource of searching and approach effectively to solve phosphorus slag powder is described.
With careless plasmoid for although black liquor that raw material alkali paper-making produces has stronger alkalescence and more xylogen and the organism such as hemicellulose, wood sugar, but owing to causing being difficult to recycle and harmless treatment containing than the more anionic impurity of pulp black liquor, a large amount of black liquor also serious harm health of people while causing environmental pollution.Utilize the beneficiating ingredient in straw pulp class alkali paper-making black liquor to prepare environmental pollution that phosphorus slag composite modifier not only can reduce alkali paper-making, also provides the new way of a low-cost modified phosphorus slag while realizing recycle alkali paper-making black liquor.
Summary of the invention
The problem that, quality product higher for prior art Raw cost fluctuation is comparatively large, phosphorus slag causes gelling material slow setting under cold condition, the invention provides a kind of is that the phosphorus slag composite modifier of main component is for phosphorus slag modification by straw pulp class alkali paper-making black liquor, flyash, can well solve the problem, thus improve the incorporation of phosphorus slag in gelling material at low ambient temperatures, save cement consumption, reduce Cost of Concrete.
The present invention relates to a kind of preparation method of phosphorus slag composite modifier, concrete technical scheme is as follows: containing flyash, carbide slag and straw pulp class alkali paper-making black liquor in properties-correcting agent.A certain amount of flyash and carbide slag are mixed, wherein in flyash, in silicon and carbide slag, the amount ratio of calcium substance is 1.1 ~ 1.4, add straw pulp class alkali paper-making black liquor more fully to stir, and by regulating black liquor add-on to make the pH value of liquid in system be 11 ~ 12, namely obtain phosphorus slag composite modifier.
embodiment:
In practice, the using method of above-mentioned phosphorus slag composite modifier is as follows:
1) get and need the phosphorus slag of modification to measure its P
2o
5content, adding silicone content is P
2o
5the phosphorus slag composite modifier of amount of substance 2.2 ~ 2.8 times, mixes.
2) mixture oven dry step 1) obtained is less than 1% to moisture content.
3) ground in ball mill by the mixture after oven dry, discharging after being greater than 350 orders to granularity, obtains modified phosphorous slag micropowder.
The phosphorous slag micropowder obtained after using the process of above-mentioned phosphorus slag composite modifier, because wherein carbide slag and black liquor excite environment to phosphorus slag formation strong basicity, is conducive to suppressing P
2o
5the delayed coagulation brought.Active SiO in flyash
2for the aquation of cement clinker provides nucleation site, improve effective water cement ratio simultaneously, further increase the hydration rate of grog, facilitate the raising of early strength.And organism a large amount of in black liquor makes the concrete adding modified phosphorous slag be more prone to be formed pore that is even, fine and closely woven, that close in hydration process, concrete impervious anti-freezing property effectively can be improved.The compound phosphorus slag properties-correcting agent that the present invention mentions with Industrial Solid Waste and black liquid for raw material, with low cost, not only effectively can suppress the retardation phenomenon of phosphorus slag in low temperature environment after using, improve the mixed ratio of phosphorus slag in concrete, the early strength of corresponding concrete product and impervious anti-freezing property can also be made to significantly improve simultaneously.
embodiment 1:containing flyash, carbide slag and straw pulp class alkali paper-making black liquor in properties-correcting agent.A certain amount of flyash and carbide slag are mixed, wherein in flyash, in silicon and carbide slag, the amount ratio of calcium substance is 1.1, add straw pulp class alkali paper-making black liquor more fully to stir, and by regulating black liquor add-on to make the pH value of liquid in system be 11, namely obtain phosphorus slag composite modifier.
embodiment 2:containing flyash, carbide slag and straw pulp class alkali paper-making black liquor in properties-correcting agent.A certain amount of flyash and carbide slag are mixed, wherein in flyash, in silicon and carbide slag, the amount ratio of calcium substance is 1.4, add straw pulp class alkali paper-making black liquor more fully to stir, and by regulating black liquor add-on to make the pH value of liquid in system be 12, namely obtain phosphorus slag composite modifier.
Claims (2)
1. the preparation method of a phosphorus slag composite modifier, it is characterized in that concrete scheme is as follows: a certain amount of flyash and carbide slag are mixed, wherein in flyash, in silicon and carbide slag, the amount ratio of calcium substance is 1.1 ~ 1.4, add alkali paper-making black liquor more fully to stir, and by regulating black liquor add-on to make the pH value of liquid in system be 11 ~ 12, namely obtain phosphorus slag composite modifier.
2. according to claim 1, a kind of preparation method of phosphorus slag composite modifier, is characterized in that: described alkali paper-making black liquor is straw pulp class alkali paper-making black liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510857918.2A CN105314910A (en) | 2015-11-30 | 2015-11-30 | Preparation method of phosphorus slag compound modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510857918.2A CN105314910A (en) | 2015-11-30 | 2015-11-30 | Preparation method of phosphorus slag compound modifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105314910A true CN105314910A (en) | 2016-02-10 |
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ID=55243327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510857918.2A Pending CN105314910A (en) | 2015-11-30 | 2015-11-30 | Preparation method of phosphorus slag compound modifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981356A (en) * | 2019-12-24 | 2020-04-10 | 青岛康力商砼工程有限公司 | Concrete taking industrial waste residues as admixture and preparation method thereof |
| CN113754339A (en) * | 2021-04-21 | 2021-12-07 | 西昌市蓝鼎环保科技有限公司 | Composite modifier for gypsum |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466978A (en) * | 2013-08-29 | 2013-12-25 | 武汉理工大学 | Preparation method of phosphogypsum cementing material |
-
2015
- 2015-11-30 CN CN201510857918.2A patent/CN105314910A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466978A (en) * | 2013-08-29 | 2013-12-25 | 武汉理工大学 | Preparation method of phosphogypsum cementing material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981356A (en) * | 2019-12-24 | 2020-04-10 | 青岛康力商砼工程有限公司 | Concrete taking industrial waste residues as admixture and preparation method thereof |
| CN113754339A (en) * | 2021-04-21 | 2021-12-07 | 西昌市蓝鼎环保科技有限公司 | Composite modifier for gypsum |
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Application publication date: 20160210 |