CN1528923A - Boron-magnesium compound agglomerate surface additive - Google Patents
Boron-magnesium compound agglomerate surface additive Download PDFInfo
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- CN1528923A CN1528923A CNA2003101048601A CN200310104860A CN1528923A CN 1528923 A CN1528923 A CN 1528923A CN A2003101048601 A CNA2003101048601 A CN A2003101048601A CN 200310104860 A CN200310104860 A CN 200310104860A CN 1528923 A CN1528923 A CN 1528923A
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- additive
- boric acid
- magnesium chloride
- chloride
- boron
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention refers to a kind of boron, calcium and magnesium compound sintering ore surface additives for high furnace puddling, it can be liquid or powder, the liquid one is made up of Boracic acid, magnesium chloride, and water, the proportion is: boracic acid 0.05-0.3%, magnetism chloride 0.5-3.0%, the residue is water; the proportion of powder is: boracic acid: magnetism chloride=0.04-0.3:1, the additives are sprayed onto the surface of sintering ore when in using, it can reduce the blooming rate in the furnace effectively, it can replace the single calcium additives. It can reduce the content of chloride above 1/2. It reduces the production cost.
Description
Technical field
The present invention relates to a kind of additive that is used for blast furnace ironmaking, be specifically related to a kind of boron, magnesium agglomerate surface composite additive that is used for blast furnace ironmaking.
Background technology
Help improving the quality of blast furnace ironmaking with agglomerate ironmaking, but blast furnace ironmaking agglomerate low temperature Pulverization ratio height influences blast furnace permeability.For addressing this problem, usually adopt the method for adding calcium chloride at agglomerate surface, add the low temperature Pulverization ratio that calcium chloride can reduce agglomerate significantly, but the use of calcium chloride, increased the content of chlorine in the blast furnace gas, quickened gas recovery, refrigerating unit Corrosion of Metallic Materials, simultaneously environment has been had a negative impact.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace ironmaking agglomerate surface composite additive, be used to reduce blast furnace ironmaking agglomerate low temperature Pulverization ratio, make the content of chlorine compared with the prior art can reduce more than 1/2, minimizing makes production cost descend to some extent to the corrosion of equipment with to the influence of environment simultaneously.
Compound surface additive of the present invention can be solution-type or powder-type, and solution-type is to be formed by boric acid, magnesium chloride and water mixed preparing, and its weight proportion is: boric acid is 0.05-0.3%, and magnesium chloride is 0.8-3.0%, and all the other are water; Powder-type is to be mixed by boric acid and magnesium chloride, and its weight proportion is boric acid: magnesium chloride=0.04-0.3: 1.0.
Above-mentioned solution-type compound surface additive preferred weight proportioning is: boric acid is 0.15%, and magnesium chloride is 2.0%, and all the other are water; Powder-type compound surface additive preferred weight proportioning is: boric acid: magnesium chloride=0.15: 1.0.
Advantage of the present invention and obvious effects are: utilize composite additive can improve the character of agglomerate surface, make agglomerate at low temperatures (＜500 ℃) surface in blast furnace sinter ore deposit is kept inertia and intensity, thereby reduce the low temperature Pulverization ratio of agglomerate.The compound surface additive does not exert an influence to agglomerate under high temperature (＞1000 ℃), and is identical when keeping agglomerate high temperature reduction rate and not using additive; Additive does not contain smelts harmful element to iron, do not contain quality, State of Blast Furnace ore deposit and refractory materials to the iron element that has a negative impact, and that chlorine element consumption reduces is about more than 1/2, therefore correspondingly also reduced the heavy corrosion that blast furnace and installation for blast furnace gas is cooled back receiving apparatus, also alleviated pollution simultaneously environment.In addition, composite additive is compared with the calcium chloride additive with simple, and production cost descends to some extent.
Embodiment
It is raw material greater than 95% magnesium chloride and purity greater than 98% boric acid that example 1. is chosen purity, and uniform mixing is mixed with the solution-type composite additive with water, and its weight proportion is: boric acid 0.15%, and magnesium chloride 1.0%, all the other are water.The above-mentioned compound surface additive solution for preparing is sprayed at agglomerate surface, measures the low temperature Pulverization ratio.Below to not adding additive, the agglomerate that adds calcium chloride additive and adding composite additive of the present invention, carry out the test of iron ore low temperature Pulverization ratio respectively according to standard GB/T13242-91, consequently: not doping＞35.0, adding calcium chloride is 22.5, and adding composite additive of the present invention is 21.9.
Raw material that example 2. is chosen and compound method are with example 1, and the weight proportion of composite additive is: boric acid 0.05%, and magnesium chloride 0.8%, all the other are water.Use and test by example 1 method, the test for low temperature Pulverization ratio result of institute is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 22.8.
Raw material that example 3. is chosen and compound method are with example 1, and the weight proportion of composite additive is: boric acid 0.3%, magnesium chloride are 2.0%, and all the other are water.Use and test by example 1 method, the test for low temperature Pulverization ratio result of institute is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 19.4.
It is raw material greater than 95% magnesium chloride and purity greater than 98% boric acid all that example 4. is chosen purity, uniform mixing is made the pulvis composite additive, its weight proportion is: boric acid: magnesium chloride=0.04: 1.0 is mixed with spray solution at agglomerate surface with the composite additive water during application.
Raw material that example 5. is chosen and compound method are with example 4, and its weight proportion is: boric acid: magnesium chloride=0.1: 1.0, water is mixed with spray solution at agglomerate surface during application.
Raw material that example 6. is chosen and compound method are with example 4, and its weight proportion is: boric acid: magnesium chloride=0.3: 1.0 is mixed with spray solution at agglomerate surface with the composite additive water during application.
Claims (3)
1. boron magnesium composite sinter surface additive, it is characterized in that: additive can be solution-type or powder-type, and solution-type is to be formed by boric acid, magnesium chloride and water mixed preparing, and its weight proportion is: boric acid is 0.05～0.3%, magnesium chloride is 0.8-3.0%, and all the other are water; The powder-type additive is to be mixed by boric acid, magnesium chloride, and its weight proportion is boric acid: magnesium chloride=0.04-0.3: 1.0.
2. according to the described a kind of boron magnesium composite sinter surface additive of claim 1, it is characterized in that the preferred weight proportion of solution-type compound surface additive is: boric acid is 0.15%, and magnesium chloride is 2.0%, and all the other are water.
3. according to the described a kind of boron magnesium composite sinter surface additive of claim 1, it is characterized in that the preferred weight proportion of powder-type compound surface additive is a boric acid: magnesium chloride=0.15: 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101048601A CN1528923A (en) | 2003-10-20 | 2003-10-20 | Boron-magnesium compound agglomerate surface additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101048601A CN1528923A (en) | 2003-10-20 | 2003-10-20 | Boron-magnesium compound agglomerate surface additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1528923A true CN1528923A (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101048601A Pending CN1528923A (en) | 2003-10-20 | 2003-10-20 | Boron-magnesium compound agglomerate surface additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1528923A (en) |
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2003
- 2003-10-20 CN CNA2003101048601A patent/CN1528923A/en active Pending
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