CN103373829A - Superfine blast furnace slag powder activator, and preparation method and use thereof - Google Patents
Superfine blast furnace slag powder activator, and preparation method and use thereof Download PDFInfo
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- CN103373829A CN103373829A CN2012101172576A CN201210117257A CN103373829A CN 103373829 A CN103373829 A CN 103373829A CN 2012101172576 A CN2012101172576 A CN 2012101172576A CN 201210117257 A CN201210117257 A CN 201210117257A CN 103373829 A CN103373829 A CN 103373829A
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- furnace slag
- exciting agent
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Abstract
The invention discloses a superfine blast furnace slag powder activator. The superfine blast furnace slag powder activator contains the following chemical constituents by weight percent: 30-46% of Ca, 40-56% of SO3, 0.01-0.1% of Na2O, 0.01-0.1% of CaCl2 and 2-6% of H2O, and the balance of impurities. The invention further discloses a preparation method and a use of the superfine blast furnace slag powder activator. The activator provided by the invention is mixed in blast furnace slag to be ground, so as to be used for preparing concrete, cement doped material and building material products. When the activator provided by the invention is mixed in blast furnace slag so as to be used for preparing concrete, cement doped material and building material products, the activator can impel the blast furnace slag powder to perform hydration reaction, and can totally stimulate the potential activity of the blast furnace slag, thus, the 7-day compressive strength of the blast furnace slag is improved by 8-15% and the 28-day compressive strength of the same is improved by 5-10%.
Description
Technical field
The present invention relates to activity excitant, particularly a kind of blast-furnace cinder micro-powder exciting agent.
Background technology
Iron And Steel Industry produces SO
2Source of pollution be mainly sintering circuit.The SO that the sintering process process produces
2Quantity discharged accounts for iron and steel enterprise's annual emissions 40%～60%, control sintering production process SO
2Discharging, be the SO of iron and steel enterprise
2The emphasis of control.The equal auxiliary construction flue gas desulfurization (FGD) unit of the sinter machine of domestic and international advanced iron and steel enterprise generally adopts dry method lime or wet method lime desulfurization technology.But along with coming into operation of sintered flue gas desulfurization device, the utilization of sintering flue gas desulfurization by product---desulfurization slag has become again the human new problem of puzzlement, the by product desulfurization slag that sinter fume wet method lime desulfurization technology produces also not preferably maturation utilize technology.
Blast-furnace slag is the byproduct that discharges from blast furnace when smelting the pig iron; rapid cooling liquid state melting granulated blast-furnace slag and the product that obtains; its mineral composition major part is glass state material; preferably lateral reactivity is arranged; behind grinding, be commonly used for concrete and cement admixture, but the activity of slag powders need to excite and could better embody.Existing exciting agent is exactly with containing Ca
2+, K
+, Na
+Disintegrate on the vitreum network of positively charged ion to GBFS, impel GBFS to carry out hydration reaction, but the exciting agent launching efficiency is low, can not all excite the lateral reactivity of blast-furnace slag.
Summary of the invention
The purpose of this invention is to provide a kind of blast-furnace cinder micro-powder exciting agent, it is low to solve existing exciting agent launching efficiency, can not all excite the technical problem of blast-furnace slag lateral reactivity, the recycling problem after solving simultaneously desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces and reclaiming.
The technical solution used in the present invention is:
A kind of blast-furnace cinder micro-powder exciting agent, the weight percent of its chemical composition is: CaO 30-46%, SO
340-56%, Na
2O 0.01-0.1%, CaCl
20.01-0.1%, H
2O 2-6%, all the other can be impurity.
A kind of preparation method of blast-furnace cinder micro-powder exciting agent may further comprise the steps, and reclaims the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces, and the weight percent of desulfurization slag chemical composition is: CaO 30-46%, SO
340-56%, Na
2O 0.01-0.1%, CaCl
20.01-0.1%, H
2O 7-15%, all the other can be impurity;
Desulfurization slag is carried out granulation, and particle diameter is 1-3mm; For guaranteeing to connect certain tactile area and good ventilation property particle diameter should not be less than 1mm, particle diameter then is not easy to oven dry greater than 3mm, and energy consumption is high during oven dry;
Desulfurization slag after the granulation is dried under 100 ℃～240 ℃ temperature, and when bake out temperature was 100 ℃～240 ℃, drying effect was best, at this moment CaSO
42H
2O becomes CaSO
41/2H
2O; Bake out temperature is less than 100 ℃, and then moisture can not get evaporation, and bake out temperature is greater than 240 ℃ of CaSO
42H
2O can become CaSO
4, not only increased energy consumption, and reduced simultaneously the intensity of exciting agent.
Desulfurization slag insulation 1h～6h namely obtains blast-furnace cinder micro-powder exciting agent of the present invention after will drying, and the weight percent of its chemical composition is: CaO 30-45%, SO
340-55%, Na
2O 0.01-0.1%, CaCl
20.01-0.1%, H
2O 2-8%, all the other can be impurity.
A kind of purposes of blast-furnace cinder micro-powder exciting agent, exciting agent of the present invention is incorporated into grinding in the blast-furnace slag, make concrete, cement admixture and building material made, volume is that the 3-7% of blast-furnace slag quality is good, volume can cause later strength to be shunk greater than 7%, and volume is less than 3% effect that reaches the lateral reactivity that all excites blast-furnace slag.
The present invention has following positively effect compared to existing technology:
Exciting agent of the present invention is incorporated into blast-furnace slag; when making concrete, cement admixture and building material made; can impel GBFS to carry out hydration reaction; all excite the lateral reactivity of blast-furnace slag; 7 days ultimate compression strength of blast-furnace slag improve 8～15%, 28 days ultimate compression strength and improve 5～10%.
Embodiment
Embodiment 1 reclaims the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces, above-mentioned desulfurization slag is carried out granulation, particle diameter is controlled to be 1-3mm, under 200 ℃ of temperature, dry after the granulation, insulation 3.5h after the oven dry, obtain ground granulated blast furnace slag exciting agent of the present invention, the weight percent that detects its chemical ingredients is: CaO 37.5%, SO
352.1%, Na
2O 0.03%, CaCl
20.02%, H
2O 3.42%, and all the other can be 6.93%.Exciting agent of the present invention is mixed grinding in the blast-furnace slag by 4% volume, make ground granulated blast furnace slag.7 days ultimate compression strength of ground granulated blast furnace slag improve 15%, 28 day ultimate compression strength and improve 10%.
Embodiment 2 reclaims the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces, above-mentioned desulfurization slag is carried out granulation, particle diameter is controlled to be 1-3mm, under 100 ℃ of temperature, dry after the granulation, insulation 6h after the oven dry, obtain ground granulated blast furnace slag exciting agent of the present invention, the weight percent that detects its chemical ingredients is: CaO 39.8%, SO
349.3%, Na
2O 0.02%, CaCl
20.02%, H
2O 3.28%, impurity 7.58%.Exciting agent of the present invention is mixed grinding in the blast-furnace slag by 7% volume, make ground granulated blast furnace slag.7 days ultimate compression strength of blast-furnace slag improves 13%, 28 day ultimate compression strength and improves 9%.
Embodiment 3 reclaims the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces, above-mentioned desulfurization slag is carried out granulation, particle diameter is controlled to be 1-3mm, under 300 ℃ of temperature, dry after the granulation, insulation 1h after the oven dry, obtain ground granulated blast furnace slag exciting agent of the present invention, the weight percent that detects its chemical ingredients is: CaO 42.9%, SO
347.8%, Na
2O 0.03%, CaCl
20.03%, H
2O 3.35%, impurity 5.89%.Exciting agent of the present invention is mixed grinding in the blast-furnace slag by 6% volume, and 7 days ultimate compression strength of blast-furnace slag improves 15%, 28 day ultimate compression strength and improves 9%.
Embodiment 4 reclaims the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces, above-mentioned desulfurization slag is carried out granulation, particle diameter is controlled to be 1-3mm, do not dry after the granulation and be incubated, obtain ground granulated blast furnace slag exciting agent of the present invention, the weight percent that detects its chemical ingredients is: CaO 32.9%, and SO3 47.8%, Na
2O 0.03%, CaCl
20.03%, H
2O 13.35%, and impurity 5.89% is mixed grinding in the blast-furnace slag with exciting agent of the present invention by 6% volume, and 7 days ultimate compression strength of blast-furnace slag improves 10%, 28 day ultimate compression strength and improves 7%.
Claims (7)
1. blast-furnace cinder micro-powder exciting agent, the weight percent of its chemical composition is: CaO 30-46%, SO
340-56%, Na
2O 0.01-0.1%, CaCl
20.01-0.1%, H
2O 2-6%, all the other can be impurity.
2. the preparation method of blast-furnace cinder micro-powder exciting agent as claimed in claim 1 may further comprise the steps: reclaim the desulfurization slag that steel enterprise sintering flue gas wet method lime desulfurization produces; Desulfurization slag is carried out granulation; Desulfurization slag after the granulation is dried; Desulfurization slag is incubated after will drying.
3. the preparation method of blast-furnace cinder micro-powder exciting agent as claimed in claim 2 is characterized in that when described desulfurization slag was carried out granulation, particle diameter was controlled to be 1-3mm.
4. the preparation method of blast-furnace cinder micro-powder exciting agent as claimed in claim 2 is characterized in that it is 100 ℃-240 ℃ that described desulfurization slag is carried out bake out temperature.
5. the preparation method of blast-furnace cinder micro-powder exciting agent as claimed in claim 2 is characterized in that the soaking time of described desulfurization slag is 1h～6h.
6. the purposes of blast-furnace cinder micro-powder exciting agent as claimed in claim 1 is incorporated into grinding in the blast-furnace slag with described exciting agent, makes concrete, cement admixture and building material made.
7. the purposes of blast-furnace cinder micro-powder exciting agent as claimed in claim 1, the volume that described exciting agent is incorporated into blast-furnace slag is the 3-7% of blast-furnace slag quality.
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|---|---|---|---|
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|---|---|---|---|
| CN2012101172576A CN103373829A (en) | 2012-04-20 | 2012-04-20 | Superfine blast furnace slag powder activator, and preparation method and use thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386937A (en) * | 2014-10-22 | 2015-03-04 | 中北大学 | Composite activator for coal ash baking-free bricks and preparation method and use method thereof |
| CN104926173A (en) * | 2015-06-17 | 2015-09-23 | 遵义市聚源建材有限公司 | Composite superfine slag powder and preparation method thereof |
| CN108793794A (en) * | 2018-06-22 | 2018-11-13 | 深圳市颐泰中和科技有限公司 | The method of red mud solidified cementitious compositions and preparation method thereof and in-situ solidifying red mud |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519285A (en) * | 2009-03-04 | 2009-09-02 | 上海梅山钢铁股份有限公司 | Composite powder excitant of steel slag powder, granulated blast furnace slag powder and steel scruff, preparation and application of the composite powder excitant |
-
2012
- 2012-04-20 CN CN2012101172576A patent/CN103373829A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519285A (en) * | 2009-03-04 | 2009-09-02 | 上海梅山钢铁股份有限公司 | Composite powder excitant of steel slag powder, granulated blast furnace slag powder and steel scruff, preparation and application of the composite powder excitant |
Non-Patent Citations (2)
| Title |
|---|
| M.B.BOHHAPEHKO等: "水泥工业用磷石膏的造粒", 《贵州化工》, no. 1, 31 December 1992 (1992-12-31), pages 58 - 61 * |
| 上海市建设委员会: "粒化高炉矿渣微粉在水泥混凝土中应用技术规程", 《粒化高炉矿渣微粉在水泥混凝土中应用技术规程》, 1 December 1999 (1999-12-01), pages 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386937A (en) * | 2014-10-22 | 2015-03-04 | 中北大学 | Composite activator for coal ash baking-free bricks and preparation method and use method thereof |
| CN104926173A (en) * | 2015-06-17 | 2015-09-23 | 遵义市聚源建材有限公司 | Composite superfine slag powder and preparation method thereof |
| CN108793794A (en) * | 2018-06-22 | 2018-11-13 | 深圳市颐泰中和科技有限公司 | The method of red mud solidified cementitious compositions and preparation method thereof and in-situ solidifying red mud |
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Application publication date: 20131030 |