CN1312299C - Boron-calcium-magnesium compound agglomerate surface additive - Google Patents
Boron-calcium-magnesium compound agglomerate surface additive Download PDFInfo
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- CN1312299C CN1312299C CNB2003101048599A CN200310104859A CN1312299C CN 1312299 C CN1312299 C CN 1312299C CN B2003101048599 A CNB2003101048599 A CN B2003101048599A CN 200310104859 A CN200310104859 A CN 200310104859A CN 1312299 C CN1312299 C CN 1312299C
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- China
- Prior art keywords
- additive
- calcium chloride
- agglomerate
- calcium
- boric acid
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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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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a boron-calcium-magnesium compound agglomerate surface additive for smelting iron in a blast furnace, which can be solution or powder. The solution is prepared from 0.04 to 0.3 wt% of boric acid, 0.5 to 2.0 wt% of calcium chloride, 0.5 to 2.0 wt% of magnesium chloride and water as the rest and the raw materials are uniformly mixed in a general conventional method; the powder is prepared from 0.1 to 0.3 wt% of boric acid, 1 wt% of calcium chloride and 0.5 to 1 wt% of magnesium chloride. In application, the solution of the compound surface additive is sprayed to the surface of an agglomerate so that the low temperature pulverization ratio of the agglomerate in the blast furnace can be effectively reduced and the compound surface additive can replace a single calcium chloride additive generally used at present. Compared with the prior art, the present invention can reduce more than 2/3 of chlorinity in the additive so that the present invention has the advantages of little serious corrosion on the blast furnace and a gas recovery device, little environment pollution and low 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, 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 2/3, 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, calcium chloride, magnesium chloride and water mixed preparing, its weight proportion is: boric acid accounts for 0.04-0.3%, calcium chloride accounts for 0.5-2.0%, and magnesium chloride accounts for 0.5-2.0%, and all the other are water; Powder-type is to be mixed by boric acid, calcium chloride and magnesium chloride, and its weight proportion is: boric acid: calcium chloride: magnesium chloride=0.1-0.3: 1: 0.5-1.
Above-mentioned solution-type compound surface additive preferred weight proportioning is: boric acid is 0.15%, and calcium chloride 1.5%, magnesium chloride are 0.8%, and all the other are water, and powder-type surface additive preferred weight ratio is: boric acid: calcium chloride: magnesium chloride=0.1: 1: 0.5.
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 2/3, 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
Example 1. is chosen purity all greater than 98% boric acid, purity is raw material greater than 95% calcium chloride and magnesium chloride, uniform mixing, and being mixed with the solution-type composite additive with water, its weight proportion is: boric acid 0.1%, chlorination are calcium 1.5%, magnesium chloride 1.0%, all the other are water, during application be with the above-mentioned composite additive spray solution for preparing at agglomerate surface, measure 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 is 21.1.
Example 2. raw materials choose with compound method with example 1, the weight proportion of composite additive is: boric acid 0.04%, calcium chloride are 1.0%, magnesium chloride is 0.5%, all the other are water.Use and test agglomerate low temperature Pulverization ratio according to example 1 method, the result is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 22.4.
Example 3. raw materials choose with compound method with example 1, the weight proportion of composite additive is: boric acid 0.3%, calcium chloride are 2.0%, magnesium chloride is 1.5%, all the other are water.Use composite additive according to example 1 method, and test agglomerate low temperature Pulverization ratio, the result is: not doping＞35.0, and adding calcium chloride is 22.5, adding composite additive of the present invention is 18.9.
Example 4. is chosen purity all greater than 98% boric acid, purity is raw material greater than 95% calcium chloride and magnesium chloride, uniform mixing is made the pulvis composite additive, and its weight proportion is: boric acid: calcium chloride: magnesium chloride=0.1: 1: 0.5, 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: boric acid: calcium chloride: magnesium chloride=0.1: 1: 1.
Example 6. raw materials and compound method are with example 4, and its weight proportion is: boric acid: calcium chloride: magnesium chloride=0.2: 1: 1.
Example 7. raw materials and compound method are with example 4, and its weight proportion is: boric acid: calcium chloride: magnesium chloride=0.3: 1: 0.5.
Example 8. raw materials and compound method are with example 4, and its weight proportion is: boric acid: calcium chloride: magnesium chloride=0.3: 1: 1.
Claims (1)
1, a kind of boron-calcium-magnesium composite sinter surface additive is characterized in that additive is solution-type or powder-type, and solution-type is formed by boric acid, calcium chloride, magnesium chloride and water mixed preparing, its weight proportion is: boric acid is 0.15%, calcium chloride is 1.5%, and magnesium chloride is 0.8%, and all the other are water; The powder-type additive is to be mixed by boric acid, calcium chloride and magnesium chloride, and its weight proportion is a boric acid: calcium chloride: magnesium chloride=0.2: 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101048599A CN1312299C (en) | 2003-10-20 | 2003-10-20 | Boron-calcium-magnesium compound agglomerate surface additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101048599A CN1312299C (en) | 2003-10-20 | 2003-10-20 | Boron-calcium-magnesium compound agglomerate surface additive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1528922A CN1528922A (en) | 2004-09-15 |
| CN1312299C true CN1312299C (en) | 2007-04-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101048599A Expired - Fee Related CN1312299C (en) | 2003-10-20 | 2003-10-20 | Boron-calcium-magnesium compound agglomerate surface additive |
Country Status (1)
| Country | Link |
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| CN (1) | CN1312299C (en) |
Families Citing this family (1)
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226603A (en) * | 1999-01-29 | 1999-08-25 | 武汉钢铁(集团)公司 | Method for reducing reductive powdering rate of artificial rich minerals at low temperature |
| CN1366085A (en) * | 2001-10-31 | 2002-08-28 | 孙挺 | Composite surficial additive for sinterred ore of blast furnace |
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2003
- 2003-10-20 CN CNB2003101048599A patent/CN1312299C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226603A (en) * | 1999-01-29 | 1999-08-25 | 武汉钢铁(集团)公司 | Method for reducing reductive powdering rate of artificial rich minerals at low temperature |
| CN1366085A (en) * | 2001-10-31 | 2002-08-28 | 孙挺 | Composite surficial additive for sinterred ore of blast furnace |
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| Publication number | Publication date |
|---|---|
| CN1528922A (en) | 2004-09-15 |
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Granted publication date: 20070425 Termination date: 20161020 |
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| CF01 | Termination of patent right due to non-payment of annual fee |