CN1528924A - Calcium-magnesium compound agglomerate surface additive - Google Patents
Calcium-magnesium compound agglomerate surface additive Download PDFInfo
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- CN1528924A CN1528924A CNA2003101048616A CN200310104861A CN1528924A CN 1528924 A CN1528924 A CN 1528924A CN A2003101048616 A CNA2003101048616 A CN A2003101048616A CN 200310104861 A CN200310104861 A CN 200310104861A CN 1528924 A CN1528924 A CN 1528924A
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- chloride
- calcium
- calcium chloride
- additive
- magnesium
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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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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 calcium chloride and magnesium chloride, and water, the proportion is: calcium chloride 0.5-3.0%, magnetism chloride 0.5-3.0%, the residue is water; the proportion of powder is: calcium chloride: magnetism chloride=1:0.5-1.5, 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 1/4. 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 calcium 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 the blast furnace ironmaking agglomerate exists 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 1/4, 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 calcium chloride, magnesium chloride and water mixed preparing, and its weight proportion is: calcium chloride is 0.5-3.0%, and magnesium chloride is 0.5-3.0%, and all the other are water; Powder-type is to be mixed by calcium chloride and magnesium chloride, and its weight proportion is a calcium chloride: magnesium chloride=1.0: 0.5-1.5.
Above-mentioned solution combined surface additive preferred weight proportioning is a calcium chloride 2.0%, magnesium chloride 2.0%, and all the other are water.Powder-type compound surface additive preferred weight proportioning is: calcium chloride: magnesium chloride=1.0: 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 1/4, 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 is descended to some extent.
Embodiment
It is the raw material uniform mixing greater than 95% calcium chloride and magnesium chloride all that example 1. is chosen purity, and be mixed with the solution-type composite additive with water, its weight proportion is: calcium chloride is 1.5%, magnesium chloride is 1.5%, all the other are water, be that the above-mentioned compound surface additive solution for preparing is sprayed at agglomerate surface during application, measure the low temperature Pulverization ratio.Below to not adding additive, add the calcium chloride additive, the agglomerate that adds 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 22.2.
Example 2. raw materials choose with compound method with example 1, the weight proportion of composite additive is: calcium chloride is 0.5%, magnesium chloride is 0.5%, all the other are water.Using also according to example 1 method, test for low temperature Pulverization ratio result is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 22.6.
Example 3. raw materials choose with compound method with example 1, the weight proportion of composite additive is: calcium chloride is 2.5%, magnesium chloride is 2.5%, all the other are water.Using also according to example 1 method, test for low temperature Pulverization ratio result is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 21.8.
Example 4. is chosen purity all greater than 95% calcium chloride, magnesium chloride is the raw material uniform mixing, make the powder-type composite additive, its weight proportion is: calcium chloride: magnesium chloride=1.0: 0.5 is that compound surface additive water is mixed with spray solution at agglomerate surface during application.
Example 5. raw materials and compound method are with example 4, and its weight proportion is: calcium chloride: magnesium chloride=1.0: 1.0.Be that compound surface additive water is mixed with spray solution at agglomerate surface during application.
Example 6. raw materials and compound method are with example 4, and its weight proportion is: calcium chloride: magnesium chloride=1.0: 1.5.Be that compound surface additive water is mixed with spray solution at agglomerate surface during application.
Claims (3)
1. calcium magnesium composite sinter surface additive, calcium chloride is one of its component, it is characterized in that additive can be solution-type or powder-type, solution-type is to be formed by calcium chloride, magnesium chloride and water mixed preparing, its weight proportion is: calcium chloride is 0.5-3.0%, magnesium chloride is 0.5-3.0%, and all the other are water; Powdery type additive is to be mixed by calcium chloride and magnesium chloride, and its weight proportion is a calcium chloride: magnesium chloride=1.0: 0.5-1.5.
2. according to the described calcium magnesium of claim 1 composite sinter surface additive, it is characterized in that the preferred weight proportion of solution-type compound surface additive is: calcium chloride is 2.0%, and magnesium chloride is 2.0%, and all the other are water.
3. according to the described calcium magnesium of claim 1 composite sinter surface additive, it is characterized in that the preferred weight proportion of powder-type compound surface additive is a calcium chloride: magnesium chloride=1.0: 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101048616A CN1528924A (en) | 2003-10-20 | 2003-10-20 | Calcium-magnesium compound agglomerate surface additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101048616A CN1528924A (en) | 2003-10-20 | 2003-10-20 | Calcium-magnesium compound agglomerate surface additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1528924A true CN1528924A (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101048616A Pending CN1528924A (en) | 2003-10-20 | 2003-10-20 | Calcium-magnesium compound agglomerate surface additive |
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| Country | Link |
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| CN (1) | CN1528924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560085A (en) * | 2012-01-18 | 2012-07-11 | 中南大学 | Additive for reinforcing zinc removal of dust containing zinc and iron by metallized pellet sintering roasting |
| CN102899481A (en) * | 2011-07-29 | 2013-01-30 | 王振江 | Calcium-magnesium sintering additive and production process flows thereof |
-
2003
- 2003-10-20 CN CNA2003101048616A patent/CN1528924A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899481A (en) * | 2011-07-29 | 2013-01-30 | 王振江 | Calcium-magnesium sintering additive and production process flows thereof |
| CN102560085A (en) * | 2012-01-18 | 2012-07-11 | 中南大学 | Additive for reinforcing zinc removal of dust containing zinc and iron by metallized pellet sintering roasting |
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