CN103558108B - A kind of method measuring metal Ferrum content in converter slag - Google Patents
A kind of method measuring metal Ferrum content in converter slag Download PDFInfo
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- CN103558108B CN103558108B CN201310316266.2A CN201310316266A CN103558108B CN 103558108 B CN103558108 B CN 103558108B CN 201310316266 A CN201310316266 A CN 201310316266A CN 103558108 B CN103558108 B CN 103558108B
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Abstract
The invention discloses a kind of method measuring metal Ferrum content in converter slag, first slag is carried out drying and pulverizing by the method, then carries out magnetic separation, finally reduces to the metal hydrogen of magnetic separation again.By weighing the last amount generating water, calculating the amount of Oxygen in Metals iron after magnetic separation, then deducting the amount measuring metallic iron in vessel slag of iron oxide with total metal content after magnetic separation.The present invention increases chamber type electric resistance furnace or muffle furnace carries out moisture evaporation, makes result more accurate; Adopt soda-lime to carry out drying to hydrogen, eliminate the water vapor in hydrogen, accurate to ensure the amount of the water vapor that last condenser pipe is collected; The mode adopting physics and chemistry to combine, isolates metallic iron and chemical combination iron accurately.
Description
Technical field
The present invention relates to a kind of method measuring metal Ferrum content in converter slag, belong to metal analysis detection technique field.
Background technology
Containing abundant heat energy in slag, and contain the steel scrap of about 10%, and a large amount of useful chemical elements, make full use of the useful component in slag, the recovery benefit of slag can be improved.Slag is mainly used for foundation backfill, urban road laying, cement raw material, water purification agent and slag fertilizer etc. by China.
The object of slag processing makes slag efflorescence as early as possible, and scrap metal material is separated with slag, reduces the free calcium oxide (f-CaO) in slag, to reclaim the metal charge in slag as much as possible, improves the comprehensive utilization ratio of tailings.In slag, the height of metal Ferrum content can reflect steelmaking process level of control.Steel-making slag powder is referred and synthesized in cement, has clear and definite regulation to iron content, requires that in slag, iron content is less than 2%, simultaneously in steel-making slag powder manufacturing process, if metal Ferrum content is too high, larger to rod mill damage, therefore measure metal in the dreg iron content, be conducive to the processing of steel-making slag powder and meet the requirement of cement.
Summary of the invention
Technical matters to be solved by this invention is, for the defect existed in existing low-carbon high-chromium steel smelting technique, propose a kind of method measuring metal Ferrum content in converter slag, by the reasonable combination of physics and chemistry method, make metal Ferrum content in its Accurate Determining converter slag.
The technical scheme that the present invention solves above technical matters is: provide a kind of method measuring metal Ferrum content in converter slag, comprise the following steps:
(1) get quantitative slag M to be placed in chamber type electric resistance furnace or muffle furnace and to heat, heating-up temperature 115 DEG C-125 DEG C, heat time 4-6 hour, stirs once every half an hour in heating process, by heating, the moisture evaporated in slag, contribute to the accuracy tested;
(2) comminutor slag after heating being put into closed grinds, slag after grinding passes through the sieve of 80 μm, not by slag specimen proceed grinding, until all pass through sieve, by slag granularity is ground to less than 80 μm, be conducive to follow-up magnetic separation, make magnetic separation result more accurate;
(3) adopt permanent magnet, magnet periphery magnetic flux density at 0.140T ± more than 0.005T, to pulverize after slag adsorb, by magnet adsorption to slag specimen carry out weighing M1;
(4) adopt hydrogen reducing device, to magnet adsorption to slag specimen reduce, and the weight M2 of water after taking reduction;
(5) logical chemical formula H
2+ Fe
2o
3=Fe+H
2o, calculate by chemical molecular gauge, the quality of water is M2, and the molecular weight of di-iron trioxide is 160, and the molecular weight of water is 18, and therefore M3=(80/27) M2 calculates, and calculates the amount M3 of rear oxidation iron;
(6) the content M4=(M1-M3 of metal in the dreg iron)/M;
Further restriction technical scheme of the present invention: the method for metal Ferrum content in aforesaid mensuration converter slag, the hydrogen reducing device in step (4) is made up of the soda-lime bottle connected successively through pipeline, reduction sagger and water vapor condensation pipe;
Hydrogen is first by after soda-lime bottle, and water adsorption is clean; Then enter the reduction sagger that slag specimen is housed, the temperature in control reduction sagger is more than 350 DEG C; Finally the water vapor of generation is collected by condenser pipe, take weight M2.
Further, the method for metal Ferrum content in aforesaid mensuration converter slag, in step (3) magnet adsorption to slag specimen be metallic iron and Fe
3o
4.
Compared with the existing technology, tool of the present invention has the following advantages:
(1) increase chamber type electric resistance furnace or muffle furnace carry out moisture evaporation, make result more accurate; (2) adopt soda-lime to carry out drying to hydrogen, eliminate the water vapor in hydrogen, accurate to ensure the amount of the water vapor that last condenser pipe is collected; (3) mode adopting physics and chemistry to combine, isolates metallic iron and chemical combination iron accurately.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
embodiment 1
The present embodiment provides a kind of method measuring converter slag metal Ferrum content, take 1000g slag, chamber type electric resistance furnace is adopted to heat, then mill in the comminutor of closed, the granularity of slag is made to be less than 80 μm, adopt permanent-magnet block to adsorb the Armco magnetic iron in slag again, reduce to the Armco magnetic iron after magnetic separation finally by hydrogen reducing device, concrete steps are as follows:
(1) slag is placed in chamber type electric resistance furnace or muffle furnace heats, temperature 120 DEG C, 4 hours heat times, stir once every half an hour in heating process;
(2) ground by the comminutor that the slag after heating puts into closed, 150g is got in each grinding, grinding 60s, the slag after grinding by the sieve of 80 μm, not by slag specimen proceed grinding;
(3) adopt permanent magnet, magnet periphery magnetic flux density, at 0.140T ± 0.005T, is adsorbed, and will be adsorbed onto slag specimen and carry out weighing M1=108.2g;
(4) adopt hydrogen reducing device, reduce to the slag specimen be adsorbed onto, and take the weight M2 of the rear water of reduction, main device schematic diagram is as Fig. 1; Hydrogen is by after soda-lime, and water adsorption is clean, and then enter reduction sagger, the temperature in reduction apparatus is more than 350 DEG C, and the water vapor of generation is collected by condenser pipe, takes weight M2=1.1g;
(5) by calculating, amount M3=(80/27) M2=3.3g of rear oxidation iron is calculated;
(6) the amount M4=M1-M3=104.9g of metal in the dreg iron; The content of metallic iron in slag can be drawn.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (3)
1. measure a method for metal Ferrum content in converter slag, it is characterized in that comprising the following steps:
(1) get quantitative slag M to be placed in chamber type electric resistance furnace or muffle furnace and to heat, heating-up temperature 115 DEG C-125 DEG C, heat time 4-6 hour, stir once every half an hour in heating process;
(2) comminutor that the slag after heating puts into closed is ground, the slag after grinding by the sieve of 80 μm, not by slag specimen proceed grinding, until all pass through sieve;
(3) adopt permanent magnet, magnet periphery magnetic flux density is 0.140T ± 0.005T, to pulverize after slag adsorb, by magnet adsorption to slag specimen carry out weighing M1;
(4) adopt hydrogen reducing device, to magnet adsorption to slag specimen reduce, and the weight M2 of water after taking reduction;
(5) quality of water is M2, and the quality of di-iron trioxide is M3, according to chemical formula H
2+ Fe
2o
3=Fe+H
2o, the molecular weight of di-iron trioxide is 160, and the molecular weight of water is 18, then M3=(80/27) M2;
(6) the content M4=(M1-M3 of metallic iron in slag)/M.
2. the method measuring metal Ferrum content in converter slag as claimed in claim 1, is characterized in that: the hydrogen reducing device in step (4) is made up of the soda-lime bottle connected successively through pipeline, reduction sagger and water vapor condensation pipe;
Hydrogen is first by soda-lime bottle, and water adsorption is clean; Then enter the reduction sagger that slag specimen is housed, the temperature in control reduction sagger is more than 350 DEG C; Finally the water vapor of generation is collected by condenser pipe, take weight M2.
3. the as claimed in claim 1 method measuring metal Ferrum content in converter slag, is characterized in that: in step (3) magnet adsorption to slag specimen be metallic iron and Fe
2o
3.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769654A (en) * | 2016-12-13 | 2017-05-31 | 凉山瑞京环保资源开发有限公司 | A kind of method of metal Ferrum content in measure slag specimen |
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| CN104502558B (en) * | 2014-12-18 | 2016-08-24 | 本钢板材股份有限公司 | Utilize electroslag remelting to the method detecting slag iron-holder |
| CN107367436A (en) * | 2017-06-14 | 2017-11-21 | 宝钢集团新疆八钢铁有限公司 | A kind of method for determining slag iron-holder |
| CN107607427A (en) * | 2017-10-11 | 2018-01-19 | 远东电缆有限公司 | Stainless steel band Magnetic sensing methods |
| CN111896417A (en) * | 2020-06-19 | 2020-11-06 | 马鞍山钢铁股份有限公司 | Method for detecting content of metallic iron in briquetting grain steel |
| CN112378946B (en) * | 2020-09-29 | 2022-03-18 | 唐山曹妃甸区通鑫再生资源回收利用有限公司 | Efficient detection method for particle steel |
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| US6409793B1 (en) * | 1999-04-22 | 2002-06-25 | “Holderbank” Financiere Glarus AG | Method for processing steel slags containing chromium |
| CN102688804A (en) * | 2012-05-17 | 2012-09-26 | 昆明冶金研究院 | Method for recycling metal iron from steel slag of converter |
| CN102854080A (en) * | 2012-09-19 | 2013-01-02 | 武钢集团昆明钢铁股份有限公司 | Method for measuring iron content in steel slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261101A (en) * | 2009-04-07 | 2010-11-18 | Mitsutaka Hino | Method for producing metallic iron |
| JP5560947B2 (en) * | 2010-06-22 | 2014-07-30 | Ｊｆｅスチール株式会社 | Method for recovering iron and phosphorus from steelmaking slag, blast furnace slag fine powder or blast furnace slag cement, and phosphoric acid resource raw material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6409793B1 (en) * | 1999-04-22 | 2002-06-25 | “Holderbank” Financiere Glarus AG | Method for processing steel slags containing chromium |
| CN102688804A (en) * | 2012-05-17 | 2012-09-26 | 昆明冶金研究院 | Method for recycling metal iron from steel slag of converter |
| CN102854080A (en) * | 2012-09-19 | 2013-01-02 | 武钢集团昆明钢铁股份有限公司 | Method for measuring iron content in steel slag |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769654A (en) * | 2016-12-13 | 2017-05-31 | 凉山瑞京环保资源开发有限公司 | A kind of method of metal Ferrum content in measure slag specimen |
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