CN102268543A - Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive - Google Patents
Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive Download PDFInfo
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- CN102268543A CN102268543A CN 201110253730 CN201110253730A CN102268543A CN 102268543 A CN102268543 A CN 102268543A CN 201110253730 CN201110253730 CN 201110253730 CN 201110253730 A CN201110253730 A CN 201110253730A CN 102268543 A CN102268543 A CN 102268543A
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Abstract
The invention belongs to the field of iron alloy production, relating to an adhesive which is based on raw material parameters of a high-carbon ferrochrome production process, wherein a compound-type inorganic adhesive is adopted. The adhesive comprises the following components in percentage by mass: 10-30 percent of magnesium oxide, 10-30 percent of magnesium chloride and 50-70 percent of water; when the shaping adhesive is used, three components of the shaping adhesive is required to respectively, directly and uniformly mix with chromium ore powder and can not be prepared alone into an adhesive for using; and a magnesia adhesive is added into the chromium ore powder and conveyed to a strong pressure ball machine for shaping after being uniformly stirred. According to the invention, magnesium-aluminum ratio parameters can be modified by using the formula of the adhesive provided by the invention so that the produced chrome ore powder cold-pressed pellets have normal-temperature strength, and the requirement of an ore furnace on maintaining a ventilation property of furnace burden at high temperature can simultaneously be met; moreover, the chromium iron alloy pellets produced by utilizing the adhesive disclosed by the invention have the advantages of low cost and good effect.
Description
Technical field
The invention belongs to the iron alloy production field, relate to a kind of used caking agent of chromium powder ore deposit coal-pressing ball based on high carbon ferro-chrome production technique raw material parameter, used is the composite inorganic binding agent.
Background technology
Iron And Steel Industry is the basic industry of national economy, and iron alloy production is the important component part of Iron And Steel Industry.Enter 21 century, China has become the center of world steel industry, is that first produces the country that steel surpasses 400,000,000 tons per year in the world.The fast development of Iron and Steel Production has improved constantly the status of China in ferroalloy industry field, the world.Output is calculated per year, and the eighties accounts for the 4th in the world and the 3rd mid-term.Enter the nineties, behind the Soviet Union's dissolution, tired the increasing of China's iron alloy output leaps to the first, and becomes world's iron alloy first producing country and export State.
Ferrochrome is a staple product in the iron alloy product.1.4% (the equal level in the nineteen ninety world) that accounts for crude steel output by stainless steel output calculated, and China's crude steel output 2007 was 4.9 hundred million tons, and chromium content calculates by 13%, and chromium content then needs 9,910,000 tons of ferrochromes by 50% in the ferrochrome.Smelt so a large amount of ferrochrome, need a large amount of chromites.For the country of chromite resources poorness, in order to satisfy the needs of domestic Iron And Steel Industry development, China most of iron alloy enterprise uses the import chrome ore always, and this ratio progressively improves, and reaches more than 90% at present.
From high carbon ferro-chrome alloy production processing requirement, the ferrochrome lump ore is the best stove furnace charge of going into.But along with the scarcity of chromium ore resource, the output of lump ore is fewer and feweri, and grade reduces the price lifting.And corresponding with it, the chromium powder ore deposit of adopting beneficiation method to obtain is more and more, and ferrochrome manufacturing enterprise progressively brings into use the chromium powder ore deposit to produce products such as high carbon ferro-chrome, has the chromium powder ore deposit usage ratio of a lot of enterprises almost to account for half.But the chromium powder ore deposit can cause ore deposit hot stove ventilation property variation directly into stove, easy thorn fire, dust is big, series of process technical problems such as work under bad environment.Therefore, chromium powder ore deposit agglomeration process technology is one of the important outlet that solves the disparities between supply and demand of China's chrome ore.
Summary of the invention
In order to solve the use problem in chromium powder ore deposit in the high carbon ferro-chrome production, the invention provides a kind of magnesia binding agent based on the high carbon ferro-chrome production technique.
In ferrochrome was produced, the magnalium in the feed stock for blast furnace was than the technic index that is a key.Al in the slag
2O
3Content is influential to slag viscosity, if Al in the slag
2O
3Too high levels, slag viscosity increases, and is unfavorable for deslagging.But Al
2O
3Can increase the resistivity of slag, it is slotting deeply to help electrode, so require to have certain content again; The hot stove furnace lining major part in the ore deposit of smelting chromium irons is magnesia furnace lining, and the low aluminium height of magnesium of going in the furnace charge of stove can cause furnace charge to corrode furnace lining, shortens the life-span of the hot stove in ore deposit, and therefore, the magnalium that requires furnace charge in the actual production is than (MgO and Al
2O
3Mass ratio) should be greater than 1.In view of the magnalium in most of chromium powder ore deposit than less than 1, so first-selected magnesia binding agent is as chromium powder ore deposit coal-pressing ball binding agent.
The molding adhesive that a kind of chromium powder ore deposit coal-pressing ball is used, the composition quality per-cent that it is characterized in that magnesia binding agent is MgO 10-30%, MgCl
210-30%, H
2O 50-70%.
Three kinds of compositions during use in the molding adhesive will directly mix with chromite ore fine respectively, and mix, and just can play the agglutinating effect, can not be mixed with binding agent separately and re-use.
The intensity of qualified chromium powder ore deposit coal-pressing ball needs two requirements, i.e. normal temperature strength and hot strength at least.Normal temperature strength need satisfy it and harden in the short period of time, and can satisfy requirements on transport, guarantees pelletizing not broken or a small amount of fragmentation in the process of the hot stove in ore deposit in the stock ground; Hot strength is meant that coal-pressing ball can be kept perfectly at a certain temperature, help the ventilation property of furnace charge after entering the hot stove in ore deposit.Magnesium cement can be fixed at normal temperatures, can work aspect normal temperature strength.Magnesium chloride itself is exactly the binding agent of furnace lining ramming mass, therefore can play the effect of high-temperature agglomerant.
According to the used magnesia binding agent of above-mentioned chromium powder ore deposit coal-pressing ball, binding agent will produce into magnesium cement through after the aquation, and molecular formula is 5MgOMgCl
28H
2O or 3MgOMgCl
28H
2O, final formed air-setting gelatinous material has certain normal temperature strength.Coal-pressing ball is gone into stove after behind the high temperature action, MgCl
2Hydrated product decompose, generate MgO, under the effect of curing reaction and MgO recrystallize, have hot strength, can keep the ventilation property of furnace charge.
The hydration reaction mode is as follows:
MgO+H
2O→Mg(OH)
2
5Mg(OH)
2+MgCl
2+13H
2O→5Mg(OH)
2·MgCl
2·8H
2O
3Mg(OH)
2+MgCl
2+11H
2O→3Mg(OH)
2·MgCl
2·8H
2O
5MgO+Mg
2++2Cl
-+13H
2O→5Mg(OH)
2·MgCl
2·8H
2O
3MgO+Mg
2++2Cl
-+11H
2O→3Mg(OH)
2·MgCl
2·8H
2O
3Mg
2++2Cl
-+5OH
-+4H
2O→5Mg(OH)
2·MgCl
2·8H
2O
2Mg
2++Cl
-+3OH
-+4H
2O→3Mg(OH)
2·MgCl
2·8H
2O
Its notable attribute is, the prerequisite of selection of binder foundation is based in the smelting technology the requirement of magnalium than parameter, magnalium is lower than often in the chromium powder ore deposit, be unfavorable for the production of high carbon ferro-chrome, and the binder formula among the present invention, just can be to this parameter correction, and the chromium powder ore deposit coal-pressing ball of producing thus both had normal temperature strength, also can satisfy the hot stove in ore deposit at high temperature keeps ventilation property to furnace charge requirement simultaneously.
Description of drawings
Fig. 1 is adjustable atmosphere high temperature resistance to compression experimental machine structure iron, wherein 1 increased pressure beam; 2 transmitters; 3 tightness systems; 4 depression bars; 5 electrical heating elements; 6 samples; 7 load sample platforms; 8 power set.
Fig. 2 is the relation of chromium powder ore deposit coal-pressing ball ultimate compression strength and temperature, the length of black cylinder among the figure, and the variation range of the ultimate compression strength that the expression sample is tested under this temperature, sample is made by laboratory self-control sample-pressing device.
Fig. 3 is the coal-pressing ball process flow sheet.
Embodiment
Embodiment 1
Elder generation is with the industrial bittern MgCl of 85% chromite ore fine and 3%MgO and 3%
2Add 9% water after being mixed together evenly again,, be transported to belt and store up in the device and dry naturally, obtain finished ball through ball press compacting balling-up.
Elder generation is with the industrial bittern MgCl of 90% chromite ore fine and 2%MgO and 2.5%
2Add 5.5% water after being mixed together evenly again,, be transported to belt and store up in the device and dry naturally, obtain finished ball through ball press compacting balling-up.
Elder generation is with the industrial bittern MgCl of 85% chromite ore fine and 2.5%MgO and 2.5%
2Add 10% water after being mixed together evenly again,, be transported to belt and store up in the device and dry naturally, obtain finished ball through ball press compacting balling-up.
In experimentation, adopt the sample preparation of self-control sample-pressing device, high temperature resistance to compression experimental machine (Fig. 1) detects ultimate compression strength with the variation of temperature situation, and the resistance to compression effect is seen accompanying drawing 2.
In industrial production, can adopt technical process shown in Figure 3 to carry out suitability for industrialized production.
Claims (2)
1. molding adhesive that chromium powder ore deposit coal-pressing ball is used, the composition quality per-cent that it is characterized in that molding adhesive is MgO 10-30%, MgCl
210-30%, H
2O 50-70%.
2. the using method of the molding adhesive that a kind of according to claim 1 chromium powder ore deposit coal-pressing ball is used, three kinds of compositions when it is characterized in that using in the molding adhesive, to directly mix with chromite ore fine respectively, and mix, can not be mixed with binding agent separately and re-use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110253730 CN102268543A (en) | 2011-08-30 | 2011-08-30 | Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110253730 CN102268543A (en) | 2011-08-30 | 2011-08-30 | Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102268543A true CN102268543A (en) | 2011-12-07 |
Family
ID=45050996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110253730 Pending CN102268543A (en) | 2011-08-30 | 2011-08-30 | Shaping adhesive for chromium powder ore cold-pressed pellets and using method of shaping adhesive |
Country Status (1)
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|---|---|
| CN (1) | CN102268543A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747217A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Grading technology for cold-pressed pelletizing and shaft furnace magnetization roasting of powdery refractory iron oxide ore |
| CN102747221A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for making cold-pressed balls through using powdery material containing iron |
| CN103436694A (en) * | 2013-09-04 | 2013-12-11 | 宁夏天元锰业有限公司 | Method for preparing chrome ore pellets |
| CN103725873A (en) * | 2013-12-06 | 2014-04-16 | 北京神雾环境能源科技集团股份有限公司 | High-magnesium concretion agent for cold concretion ball pressing process and use method of high-magnesium concretion agent |
| CN105331808A (en) * | 2015-11-26 | 2016-02-17 | 辽宁科技大学 | Method for iron ore powder agglomeration |
| CN114592123A (en) * | 2021-12-27 | 2022-06-07 | 福建通海镍业科技有限公司 | Chromium ore powder ball and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270410A (en) * | 2007-03-20 | 2008-09-24 | 尚国洪 | Cold bonded pellet and method of producing the same |
| CN102115818A (en) * | 2009-12-31 | 2011-07-06 | 鞍钢实业集团有限公司综合利用分公司 | Binder for metallurgical cold-pressed pellets and using method thereof |
-
2011
- 2011-08-30 CN CN 201110253730 patent/CN102268543A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270410A (en) * | 2007-03-20 | 2008-09-24 | 尚国洪 | Cold bonded pellet and method of producing the same |
| CN102115818A (en) * | 2009-12-31 | 2011-07-06 | 鞍钢实业集团有限公司综合利用分公司 | Binder for metallurgical cold-pressed pellets and using method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《钢铁研究》 20110630 刘培骁等 铬粉矿冷压球团的研究 12-15 1-2 第39卷, 第3期 * |
| 《铁合金》 20110430 贾艳桦等 冷压球团技术在高碳铬铁生产中的应用 4-7,11 1-2 , 第2期 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747217A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Grading technology for cold-pressed pelletizing and shaft furnace magnetization roasting of powdery refractory iron oxide ore |
| CN102747221A (en) * | 2012-06-14 | 2012-10-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for making cold-pressed balls through using powdery material containing iron |
| CN102747217B (en) * | 2012-06-14 | 2016-06-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Powdery difficulty selects iron oxide ore cold-pressing balls agglomeration, shaft furnace magnetizing roasting sorting process |
| CN102747221B (en) * | 2012-06-14 | 2016-10-05 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Make the method for cold-pressing balls of iron content granular material |
| CN103436694A (en) * | 2013-09-04 | 2013-12-11 | 宁夏天元锰业有限公司 | Method for preparing chrome ore pellets |
| CN103725873A (en) * | 2013-12-06 | 2014-04-16 | 北京神雾环境能源科技集团股份有限公司 | High-magnesium concretion agent for cold concretion ball pressing process and use method of high-magnesium concretion agent |
| CN103725873B (en) * | 2013-12-06 | 2016-08-17 | 北京神雾环境能源科技集团股份有限公司 | One freezes off knot ball press technique high magnesium consolidating agent and using method |
| CN105331808A (en) * | 2015-11-26 | 2016-02-17 | 辽宁科技大学 | Method for iron ore powder agglomeration |
| CN105331808B (en) * | 2015-11-26 | 2017-08-29 | 辽宁科技大学 | A kind of method of iron mineral powder agglomeration |
| CN114592123A (en) * | 2021-12-27 | 2022-06-07 | 福建通海镍业科技有限公司 | Chromium ore powder ball and preparation method thereof |
| CN114592123B (en) * | 2021-12-27 | 2024-05-10 | 福建通海镍业科技有限公司 | Chromium ore powder ball and preparation method thereof |
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Application publication date: 20111207 |