CN104891836A - Washing modified ore powder containing semi-dry modified desulfurized ash - Google Patents
Washing modified ore powder containing semi-dry modified desulfurized ash Download PDFInfo
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- CN104891836A CN104891836A CN201510245189.5A CN201510245189A CN104891836A CN 104891836 A CN104891836 A CN 104891836A CN 201510245189 A CN201510245189 A CN 201510245189A CN 104891836 A CN104891836 A CN 104891836A
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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
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Abstract
A washing modified ore powder containing semi-dry modified desulfurized ash comprises the raw materials of, by weight, no less than 96% of slag powder with particle size less than 0.074mm, and no more than 4% of semi-dry modified desulfurized ash with particle size less than 0.074mm. The invention not only comprehensively utilizes blast furnace slag micropowder and semi-dry desulfurized ash, but also can effectively solve the problem of pollution caused by semi-dry desulfurized ash dump, and improves the performance of water-modified ore powder. The ore powder gains initial setting time of less than 300 min, final setting time of less than 600 min, 7-day compressive strength of not less than 22MPa and 28-day compressive strength of not less than 41MPa, and meets the standard quality requirements.
Description
Technical field
The present invention relates to a kind of construction material, belong to a kind of washing mineral powder modified containing semidrying modification desulphurize fly ash particularly.
Background technology
Along with increasing of semi-dry desulphurization project, the generation cumulative year after year of semi-dry desulphurization ash, according to statistics, a 360m
2sinter machine adopts full flue gas desulfurization, then produce 4 ~ 50,000 tons every year, and desulphurize fly ash major ingredient is calcium sulfite, calcium sulfate, calcium carbonate and calcium hydroxide.At present, desulphurize fly ash many as additive for the preparation of cement, brick or inorganic materials.Because desulphurize fly ash sulfite calcium contents is higher, during its practical application, be subject to various restriction.And a kind of industrial residue produced when slag is steel-making simultaneously, its quantity is generally 10 ~ 20% of crude steel output, and generation is huge.The generation of national slag in 2011 is about 0.7 hundred million tons, and the comprehensive utilization ratio of slag only has 20% according to incompletely statistics.The shortcomings such as traditional process for treating steel slag ubiquity floor space is large, processing environment is seriously polluted, devices consume is large; Simultaneously general modified method, usually because active oxidation calcium contents in slag is high, unstable, cannot be promoted the use of normally.Storing up in a large number of slag, brings a large amount of dust pollutions to the on-site environment of iron and steel enterprise, also occupies valuable land resources in a large number, " the dual waste " of this resource of being known as in environmentalism simultaneously.
Blast-furnace cinder micro-powder is concrete admixture and the cement mixture of high-quality, is one of first-selected mixing material of the preparation high durability concrete structure that the world today generally acknowledges.It is compared with normal concrete, and it is low, corrosion-resistant that the concrete being mixed with slag micropowder has hydration heat, strong with reinforcing bar cohesive force, and impervious strong, later strength is high.Slag micropowder as a kind of New Building Materials of super quality and competitive price deeply by the welcome of construction industry.Semi-dry desulphurization ash major ingredient is calcium sulfate, calcium sulfite, and its exterior appearance is similar to slag micropowder, has reduced investment, the simple feature of technical process for the production of breeze.At present, semi-dry desulphurization ash is direct and breeze combination treatment usually, but breeze early strength can be caused like this to decline obviously, cannot directly apply, this has become each regarding businesses problem demanding prompt solution.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, one is provided to adopt blast-furnace cinder micro-powder, and effectively can solve semi-dry desulphurization ash and store up the pollution problem brought, semi-dry desulphurization ash is fully utilized, shorten time of coagulation, and improve the washing mineral powder modified containing semidrying modification desulphurize fly ash of washing mineral powder modified performance.
Realize the measure of above-mentioned purpose:
A kind of washing mineral powder modified containing semidrying modification desulphurize fly ash, its raw material composition and weight percent content are: granularity < 0.074mm slag powders is not less than 96%, and granularity < 0.074mm semidrying modification desulphurize fly ash is no more than 4%.
It is characterized in that: described semidrying modification desulphurize fly ash is obtained by following preparation method:
1) mixed according to 1:3 ~ 8 weight ratio with water by semi-dry desulphurization ash, and stir, churning time is not less than 10min;
2) strainer is adopted to carry out solid-liquid separation;
3) adopt deionized water to wash isolated for institute solids, control chlorion weight percent content < 0.1% in the solids after washing; Zine ion weight percent content < 0.1%;
4) carry out drying, remaining moisture content weight percent content after drying controls at < 1%;
5) stand-by.
Why the present invention will carry out modification to semi-dry desulphurization ash, is due to by physico-chemical analysis, finds in desulphurize fly ash containing zinc chloride.Zinc chloride is a kind of good retardant, and retarding effect is better than general gypsum, and its retardation mechanism is Zn
2+with OH in slurry
-plasma generates insoluble in water product, covers cement particle surface, on the other hand Zn
2+be adsorbed on the embryos of aquation phase, reduce crystalline growth velocity, hinder paste structure development.Therefore for controlling the time of coagulation of slag cement in normal range, need remove the zinc chloride in desulphurize fly ash.Zinc chloride is soluble in water, adopts water-washing method to remove the advantage with economical and efficient.
The present invention compared with prior art, blast-furnace cinder micro-powder and semi-dry desulphurization ash can not only be made to be fully utilized, and effectively can solve semi-dry desulphurization ash and store up the pollution problem brought, the performance of washing mineral powder modified can also be improved, the breeze presetting period can also be made to be less than 300min, and final setting time is less than 600min, and within 7 days, ultimate compression strength is not less than 22MPa, within 28 days, ultimate compression strength is not less than 41MPa, meets standard prescriptions.
Embodiment
Below the present invention is described in detail:
Table 1 is raw material value (wt%) and the capabilities list of various embodiments of the present invention and comparative example;
Table 2 is the preparation main technologic parameters situation list of semidrying modification desulphurize fly ash in various embodiments of the present invention.
Semidrying modification desulphurize fly ash in various embodiments of the present invention is produced in accordance with the following steps:
1) mixed according to 1:3 ~ 8 weight ratio with water by semi-dry desulphurization ash, and stir, churning time is not less than 10min;
2) strainer is adopted to carry out solid-liquid separation;
3) adopt deionized water to wash isolated for institute solids, control chlorion weight percent content < 0.1% in the solids after washing; Zine ion weight percent content < 0.1%;
4) carry out drying, remaining moisture content weight percent content after drying controls at < 1%;
5) stand-by.
Raw material of the present invention, namely slag powders carries out mixing rear use with semidrying modification desulphurize fly ash.
In table 1 for the washing mineral powder modified through the present invention being contained semidrying modification desulphurize fly ash according to desulphurize fly ash and cement each 50% carry out mixing and stir evenly after; test according to method in GB/T 18046-2008 " GBFS in cement and concrete " again; contrast with unmodified breeze, it the results are shown in Table 1. simultaneously
The raw material value (wt%) of table 1 various embodiments of the present invention and comparative example and capabilities list
In table 1: modification desulphurize fly ash granularity is < 0.074mm, the granularity of slag powders is < 0.074mm;
The performance of comparative example 1 ~ 3 respectively gets 50% and mixed performance test results with cement too.
The preparation main technologic parameters situation list of semidrying modification desulphurize fly ash in table 2 various embodiments of the present invention
As can be seen from Table 1, desulphurize fly ash is mixed in breeze through modified, and time of coagulation and the mechanical strength index of breeze all improve, and the presetting period as the modification desulphurize fly ash more not modification desulphurize fly ash breeze mixing 1% shortens 34%, and final setting time shortens 8.3%; 7 days ultimate compression strength is 22.64MPa, and more former 1 improves 5.4%; Within 28 days, ultimate compression strength improves 0.3%.Mix the modification desulphurize fly ash breeze more not modification desulphurize fly ash breeze of 2%, the presetting period shortens 47%, and final setting time shortens 24%; 7 days ultimate compression strength improves 5.4%, 28 days ultimate compression strength and improves 0.05%; Mix the modification desulphurize fly ash breeze more not modification desulphurize fly ash breeze of 4%, the presetting period shortens 52%, and final setting time shortens 37%; 7 days ultimate compression strength improves 6%, 28 days ultimate compression strength and improves 1.7%, all first final setting times mixing modification desulphurize fly ash breeze, and resistance to compression folding intensity all meets GB GB18046-2008 requirement, and realizing desulphurize fly ash turns waste into wealth.
This embodiment is only the best and exemplifies, the restricted enforcement not to technical solution of the present invention.
Claims (2)
1. the washing mineral powder modified containing semidrying modification desulphurize fly ash, its raw material composition and weight percent content are: granularity < 0.074mm slag powders is not less than 96%, and granularity < 0.074mm semidrying modification desulphurize fly ash is no more than 4%.
2. a kind of washing mineral powder modified containing semidrying modification desulphurize fly ash as claimed in claim 1, is characterized in that: described semidrying modification desulphurize fly ash is obtained by following preparation method:
1) mixed according to 1:3 ~ 8 weight ratio with water by semi-dry desulphurization ash, and stir, churning time is not less than 10min;
2) strainer is adopted to carry out solid-liquid separation;
3) adopt deionized water to wash isolated for institute solids, control chlorion weight percent content < 0.1% in the solids after washing; Zine ion weight percent content < 0.1%;
4) carry out drying, remaining moisture content weight percent content after drying controls at < 1%;
5) stand-by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510245189.5A CN104891836A (en) | 2015-05-14 | 2015-05-14 | Washing modified ore powder containing semi-dry modified desulfurized ash |
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|---|---|---|---|
| CN201510245189.5A CN104891836A (en) | 2015-05-14 | 2015-05-14 | Washing modified ore powder containing semi-dry modified desulfurized ash |
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| CN104891836A true CN104891836A (en) | 2015-09-09 |
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| CN201510245189.5A Pending CN104891836A (en) | 2015-05-14 | 2015-05-14 | Washing modified ore powder containing semi-dry modified desulfurized ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007516A (en) * | 2016-05-23 | 2016-10-12 | 武汉钢铁股份有限公司 | Sintering flue gas dry process desulfurized fly ash treatment method |
| CN106064172A (en) * | 2016-05-31 | 2016-11-02 | 武汉钢铁股份有限公司 | CaSO in a kind of Desulphurization3stabilization method |
-
2015
- 2015-05-14 CN CN201510245189.5A patent/CN104891836A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007516A (en) * | 2016-05-23 | 2016-10-12 | 武汉钢铁股份有限公司 | Sintering flue gas dry process desulfurized fly ash treatment method |
| CN106007516B (en) * | 2016-05-23 | 2018-03-27 | 武汉钢铁有限公司 | One kind sintering flue gas dry desulfurizing ash processing method |
| CN106064172A (en) * | 2016-05-31 | 2016-11-02 | 武汉钢铁股份有限公司 | CaSO in a kind of Desulphurization3stabilization method |
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Application publication date: 20150909 |
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