CN106467368A - A kind of slag cement - Google Patents
A kind of slag cement Download PDFInfo
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- CN106467368A CN106467368A CN201510520224.XA CN201510520224A CN106467368A CN 106467368 A CN106467368 A CN 106467368A CN 201510520224 A CN201510520224 A CN 201510520224A CN 106467368 A CN106467368 A CN 106467368A
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- China
- Prior art keywords
- slag
- cement
- tailings
- steel slag
- steel
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a kind of slag cement, by mass by pre- for 75～98 parts of slag cements abrasive material, 0～20 part of clinker and 2～5 parts of dihydrate gypsum separate compiling to specific surface area 250～600m2/ kg, remixes and slag cement product is uniformly obtained.Instant invention overcomes slag cement early stage activity is low, later stage unstable deficiency, whole production process energy-conserving and environment-protective.
Description
Technical field
The invention belongs to metallurgical slag Treatment and recovery utilizes technical field, more particularly, to a kind of production method of slag cement.
Background technology
Slag is the by-product of steel-making, and in slag, calcium oxide mainly generates dicalcium silicate (C2S), tricalcium silicate (C3S), rhodonite
(C3) and the mineral such as olivine (CRS) MS.Dicalcium silicate (the C similar to Portland clinker is contained in slag2) and silicic acid three S
Calcium (C3S), both contents are more than 50%.Difference is that the generation temperature of slag is more than 1560 DEG C, and silicate cement
The generation temperature of mud grog is at 1460 DEG C about.The generation temperature of slag is high, and its compact crystallization, crystal grain are larger, and hydration rate delays
Slowly.Someone's slag is called burning Portland clinker.
China started from 1974 to produce slag cement and be applied in architectural engineering.In the national standard of China to slag cement it is
It is defined as below：Dross slag cement (abbreviation slag cement) is with slag, granulated bf slag as key component, adds appropriate silicon
Cream in acid salt cement grog and stone, levigate makes hydraulic cementing materials.But contain the unstable earnest such as free calcium oxide in slag
Matter, in cement concrete, traditional steel-making slag powder or its initial stage hydraulically active of slag cement are low, while later strength increases again
There is the unstable performance such as expansion.This popularization having had a strong impact on slag cement and application, therefore, technically analyze, and need
Slag is modified, makes it to meet the requirement of manufacture of cement.
Content of the invention
The invention aims to solving that slag cement early stage activity during existing slag cement produces is low, later stage unstable deficiency,
A kind of slag cement production method being provided, thus reducing the pollution of slag, improving the added value of its comprehensive utilization.
For reaching above-mentioned purpose, the technical scheme that the present invention takes is as follows：
A kind of production method of slag cement, specially：By mass by pre- for 75～98 parts of slag cements abrasive material, 0～20 part of water
Mud grog and 2～5 parts of dihydrate gypsum separate compiling are to specific surface area 250～600m2/ kg, remixes and slag cement is uniformly obtained
Product.
In such scheme, the pre- abrasive material of slag cement is injected to high pressure water quenching gained after the reaction of tap cinder ditch, slag for steel slag tailings
The straying quatity of tailings discharges the 10～30% of amount of slag for blast furnace, and is simultaneously introduced the CaO matter of 0.9～3.1 times of steel slag tailings quality
Material and 0.2～0.45 times of SiO of steel slag tailings quality2Material is as modification agent.
In such scheme, described steel slag tailings are that converter slag sieves gained granularity after hot application PROCESS FOR TREATMENT, then through magnetic separation
For 0～10mm, its Fe ＜ 1%, f-CaO ＜ 1%.
In such scheme, described modification agent granularity is less than 150 mesh, mixs homogeneously with steel slag tailings before spraying into.
In such scheme, described clinker, its chemical composition is by percentage to the quality：SiO2: 23.93%, Al2O3: 4.05%,
Fe2O3: 3.40%, SO3: 0.72%, CaO: 61.55%, MgO: 2.19%.
The operation principle of the present invention is：By converter slag after hot application PROCESS FOR TREATMENT, then through magnetic separation screening, granularity be 0～
10mm, its Fe ＜ 1%, f-CaO ＜ 1%.CaO material and the steel of 0.9～3.1 times of steel slag tailings quality is added after being dried
0.2～0.45 times of SiO of slag tailings quality2Material is as modification agent.High pressure after steel slag tailings, modification agent mixing is injected to height
In the liquid molten blast furnace slag of stove slag notch, react with blast-furnace cinder at high temperature, clear up slag and wash the free oxygen in dirt mud
Change calcium, form calcium silicates or dicalcium silicate with acid blast-furnace cinder, obtain final product the pre- abrasive product of slag cement.Again that slag cement is pre-
Abrasive material, clinker and Gypsum Fibrosum separate compiling are to specific surface area 250～600m2/ kg, remixes and slag cement product is uniformly obtained.
Beneficial effects of the present invention
The technical scheme being provided using the present invention, compared with existing public technology, has following remarkable result：
1st, the present invention makes steel slag tailings and blast-furnace cinder carry out high temperature mineral technology reaction using sensible heat, has cleared up in steel slag tailings
The unstable materials such as free calcium oxide, and by adding modification agent, so that the effective ingredient in steel slag tailings is fully reacted and obtain silicon
Sour calcium or dicalcium silicate, form the pre- abrasive product of slag cement.
2nd, the present invention makes full use of blast furnace sensible heat, has saved the energy, reduce the energy consumption cost of slag cement it is achieved that reduce discharging and
Green production.
3rd, the present invention can play the recycle value of metallurgical waste, save the natural resourcess such as limestone, reduce cement
Production cost, obtains extremely considerable economic benefit.
4th, the slag cement that the present invention produces not only has and portland slag cement identical physical and mechanical property, and after having
The series of characteristics such as phase intensity is high, the heat of hydration is low, wearability is good, impermeability is good, corrosion-resistant.This cement can be used as general
Cement is used for general industry and civil buildings, and it is special engineered to be more suitable for water conservancy, road, harbour etc..
Specific embodiment
Below by way of the embodiment of the present invention, the present invention is described in further detail, but it is not considered that the inventive method be only limitted to following
Embodiment.
Embodiment 1
Steel slag tailings are dried efflorescence to 150 mesh, take 100 weight portion steel slag tailings powder, addition 90 weight portion granularities are 200 mesh
Light dolomite as mineralizer and 21 weight portion granularities be the quartz sand of 100 mesh as modifying agent, remix uniformly be obtained steel
Slag crude product；The 15% ratio high pressure that slag crude product is discharged amount of slag with straying quatity for blast furnace is injected to tap cinder mouth
In liquid molten blast furnace slag, after reaction completely, obtain final product the pre- abrasive product of slag cement through slag flushing process.
Detect that this cement products stability is qualified.The pre- abrasive product of slag cement taking 1263 weight portions after grinding, with 480 parts
The normal sand mixing of weight portion, the additive of simultaneously additional known weight portion, make the test block of net slurry.Record 3 days comprcssive strength
22.5MPa, 28 days intensity 46.5MPa.Stability is qualified.Show that the slag cement product that steel slag modification reaction generates meets to build
Build the requirement with cement material.
Embodiment 2
Slag is dried efflorescence to 150 mesh, takes 100 weight portion steel slag tailings powder, addition 150 weight portion granularities are 250 purposes
Limestone as mineralizer and 28 weight portion granularities be the quartz sand of 120 mesh as modifying agent, remix uniformly be obtained steel slag tailings
Crude product；The 25% ratio high pressure that steel slag tailings crude product is discharged amount of slag with straying quatity for blast furnace is injected to tap cinder mouth
Liquid molten blast furnace slag in, obtain final product clinker product through slag flushing process after reaction completely.
Detect that this clinker product stability is qualified.The pre- abrasive product of slag cement taking 1200 weight portions after grinding, with
The cement mixing of 480 parts of weight portions, the additive of simultaneously additional known weight portion, make the test block of net slurry.Record 3 days pressure resistances
Degree 25.3MPa, 28 days intensity 47.8MPa.Stability is qualified.Show that the clinker product that steel slag modification reaction generates meets
The requirement of cement material for building.
Embodiment 3
Steel slag tailings are dried efflorescence to 150 mesh, take 100 weight portion steel slag tailings powder, add 300 weight portion granularities to be 200
Purpose light dolomite as mineralizer and 45 weight portion granularities be the quartz sand of 150 mesh as modifying agent, remix and be uniformly obtained
Steel slag tailings crude product；The 30% ratio high pressure that steel slag tailings crude product is discharged amount of slag with straying quatity for blast furnace is injected to height
In the liquid molten blast furnace slag of stove slag notch, after reaction completely, obtain final product the pre- abrasive product of slag cement through slag flushing process.
Detect that this slag cement pre- abrasive product stability is qualified.The pre- abrasive product of slag cement taking 1143 weight portions is through grinding
Afterwards, the cement mixing with 480 parts of weight portions, the additive of simultaneously additional known weight portion, make the test block of net slurry.Record 3 days
Comprcssive strength 28.3MPa, 28 days intensity 49.4MPa.Stability is qualified.Show that the slag cement that steel slag modification reaction generates produces
Product meet the requirement of cement material for building.
In embodiment of the present invention 1-3, steel slag tailings are modified to the requirement that slag cement all can meet cement material for building, are
Qualified embodiment, illustrates that technology exploitativeness is preferable.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, those skilled in the art is in the present invention
The usual variations and alternatives carrying out in the range of technical scheme all should comprise within the scope of the present invention.
Claims (5)
1. a kind of slag cement it is characterised in that：By mass by pre- for 75～98 parts of slag cements abrasive material, 0～20 part of cement
Grog and 2～5 parts of dihydrate gypsum separate compiling are to specific surface area 250～600m2/ kg, remixes and slag cement product is uniformly obtained
Product.
2. the method for claim 1 it is characterised in that：The pre- abrasive material of described slag cement is injected to blast furnace for steel slag tailings
Go out high pressure water quenching gained after slag runner reaction, the straying quatity of steel slag tailings discharges the 10～30% of amount of slag for blast furnace, and is simultaneously introduced
The CaO material of 0.9～3.1 times of steel slag tailings quality and 0.2～0.45 times of SiO of steel slag tailings quality2Material is as modification agent.
3. method as claimed in claim 2 it is characterised in that：Described steel slag tailings are converter slag through hot application PROCESS FOR TREATMENT
Afterwards, then sieving gained granularity through magnetic separation is 0～10mm, its Fe ＜ 1%, f-CaO ＜ 1%.
4. method as claimed in claim 2 it is characterised in that：Described modification agent granularity be less than 150 mesh, before spraying into
Steel slag tailings mix homogeneously.
5. the method for claim 1 it is characterised in that：Described clinker, its chemical composition is by percentage to the quality
For：SiO2：23.93%, Al2O3：4.05%, Fe2O3：3.40%, SO3：0.72%, CaO：61.55%, MgO：2.19%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520224.XA CN106467368A (en) | 2015-08-18 | 2015-08-18 | A kind of slag cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520224.XA CN106467368A (en) | 2015-08-18 | 2015-08-18 | A kind of slag cement |
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| Publication Number | Publication Date |
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| CN106467368A true CN106467368A (en) | 2017-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057632A (en) * | 1990-06-22 | 1992-01-08 | 文铁生 | Sulphate cement made of steel slag |
| CN1089928A (en) * | 1993-01-20 | 1994-07-27 | 马鞍山市水泥厂 | Slag cement for road |
| CN101172788A (en) * | 2007-10-17 | 2008-05-07 | 莱芜钢铁集团有限公司 | Method for producing steel-scoria and mine-scoria cement by using steel-scoria ball milled waste mud |
| WO2010143656A1 (en) * | 2009-06-09 | 2010-12-16 | 株式会社竹中工務店 | Hydraulic cement composition |
| CN102765897A (en) * | 2012-07-20 | 2012-11-07 | 泰州振昌工业废渣综合利用有限责任公司 | Composite micro-powder made of mineral slag and steel slag |
-
2015
- 2015-08-18 CN CN201510520224.XA patent/CN106467368A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057632A (en) * | 1990-06-22 | 1992-01-08 | 文铁生 | Sulphate cement made of steel slag |
| CN1089928A (en) * | 1993-01-20 | 1994-07-27 | 马鞍山市水泥厂 | Slag cement for road |
| CN101172788A (en) * | 2007-10-17 | 2008-05-07 | 莱芜钢铁集团有限公司 | Method for producing steel-scoria and mine-scoria cement by using steel-scoria ball milled waste mud |
| WO2010143656A1 (en) * | 2009-06-09 | 2010-12-16 | 株式会社竹中工務店 | Hydraulic cement composition |
| CN102765897A (en) * | 2012-07-20 | 2012-11-07 | 泰州振昌工业废渣综合利用有限责任公司 | Composite micro-powder made of mineral slag and steel slag |
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