CN103558108A - Method for determining metal iron content in converter steel slag - Google Patents
Method for determining metal iron content in converter steel slag Download PDFInfo
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- CN103558108A CN103558108A CN201310316266.2A CN201310316266A CN103558108A CN 103558108 A CN103558108 A CN 103558108A CN 201310316266 A CN201310316266 A CN 201310316266A CN 103558108 A CN103558108 A CN 103558108A
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Abstract
The present invention discloses a method for determining metal iron content in converter steel slag. The method comprises: drying and crushing steel slag, carrying out magnetic separation, carrying out reduction on the magnetic separated metal with hydrogen, weighing the finally generated water, calculating the amount of iron oxide in the magnetic separated metal, and subtracting the amount of the iron oxide by using the total amount of the magnetic separated metal to obtain the amount of metal iron in the converter slag. According to the present invention, the box type resistance furnace or muffle furnace is added to carry out water evaporation, such that the result is accurate; soda lime is adopted to dry hydrogen so as to eliminate water vapor in hydrogen, such that it is ensured that the amount of the water vapor finally collected by the condensation pipe is accurate; and the physical and chemical combination manner is adopted to accurately separate the metal iron and the iron compound.
Description
Technical field
The present invention relates to a kind of method of measuring metal Ferrum content in converter slag, belong to metal analysis detection technique field.
Background technology
In slag, contain abundant heat energy, and the steel scrap that contains 10% left and right, and a large amount of useful chemical elements, make full use of the useful component in slag, can improve the recovery benefit of slag.China is mainly used for foundation backfill, urban road laying, cement raw material, water purification agent and slag fertilizer etc. by slag.
The object of slag processing is to make slag efflorescence as early as possible, makes scrap metal material separated with slag, reduces the free calcium oxide (f-CaO) in slag, to reclaim as much as possible the metal charge in slag, 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, and iron content is had to clear and definite regulation, requires iron content in slag to be 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 existing in existing low-carbon (LC) high chrome smelting technique, proposed a kind of method of measuring metal Ferrum content in converter slag, by the reasonable combination of physics and chemistry method, made metal Ferrum content in its Accurate Determining converter slag.
The technical scheme that the present invention solves above technical matters is: a kind of method of measuring metal Ferrum content in converter slag is provided, comprises the following steps:
(1) getting quantitative slag M is placed in chamber type electric resistance furnace or muffle furnace and heats, 115 ℃-125 ℃ of heating-up temperatures, heat time 4-6 hour, stirs once every half an hour in heating process, by heating, evaporating the moisture in slag, contribute to the accuracy of test;
(2) comminutor of the slag after heating being put into closed grinds, slag after grinding is by the sieve of 80 μ m, the slag specimen of failing to pass through is proceeded to grind, until all pass through sieve, by slag granularity being ground to below 80 μ m, be conducive to follow-up magnetic separation, make magnetic separation result more accurate;
(3) adopt permanent magnet, magnet periphery magnetic flux density, more than 0.140T ± 0.005T, is adsorbed the slag after pulverizing, by magnet adsorption to slag specimen weigh M1;
(4) adopt hydrogen reducing device, to magnet adsorption to slag specimen reduce, and take the weight M2 of water after reduction;
(5) logical chemical formula H
2+ Fe
2o
3=Fe+H
2o, presses chemical molecular amount and calculates, and the quality of water is M2, and the molecular weight of di-iron trioxide is 160, and the molecular weight of water is 18, so M3=(80/27) M2 calculating, 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 comprised of the soda-lime bottle connecting 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 ℃; Finally the water vapor of generation is collected by condenser pipe, taken 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 and carry out moisture evaporation, make result more accurate; (2) adopt soda-lime to be dried hydrogen, eliminate the water vapor in hydrogen, accurate to guarantee the amount of the water vapor that last condenser pipe is collected; (3) mode that adopts 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 of measuring converter slag metal Ferrum content, take 1000g slag, adopt chamber type electric resistance furnace to heat, then in the comminutor of closed, mill, make the granularity of slag be less than 80 μ m, adopt permanent-magnet block to adsorb the Armco magnetic iron in slag, finally by hydrogen reducing device, the Armco magnetic iron after to magnetic separation reduces again, and concrete steps are as follows:
(1) slag is placed in chamber type electric resistance furnace or muffle furnace and is heated, 120 ℃ of temperature, 4 hours heat times, stir once every half an hour in heating process;
(2) comminutor of the slag after heating being put into closed grinds, and each grinding got 150g, grinds 60s, and the slag after grinding is by the sieve of 80 μ m, and the slag specimen of failing to pass through is proceeded to grind;
(3) adopt permanent magnet, magnet periphery magnetic flux density, at 0.140T ± 0.005T, is adsorbed, and will be adsorbed onto slag specimen and weigh M1=108.2 g;
(4) adopt hydrogen reducing device, the slag specimen being adsorbed onto is reduced, 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, then enters reduction sagger, and the temperature in reduction apparatus is more than 350 ℃, and the water vapor of generation is collected by condenser pipe, takes weight M2=1.1g;
(5) by calculating, calculate amount M3=(80/27) M2=3.3g of rear oxidation iron;
(6) the amount M4=M1-M3=104.9g of metal in the dreg iron; Can draw the content of metallic iron in slag.
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 requirement of the present invention.
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 and be placed in chamber type electric resistance furnace or muffle furnace and heat, 115 ℃-125 ℃ of heating-up temperatures, heat time 4-6 hour, stirs once every half an hour in heating process;
(2) comminutor of the slag after heating being put into closed grinds, and the slag after grinding is by the sieve of 80 μ m, and the slag specimen of failing to pass through is proceeded to grind, until all pass through sieve;
(3) adopt permanent magnet, magnet periphery magnetic flux density, more than 0.140T ± 0.005T, is adsorbed the slag after pulverizing, by magnet adsorption to slag specimen weigh M1;
(4) adopt hydrogen reducing device, to magnet adsorption to slag specimen reduce, and take the weight M2 of water after reduction;
(5) logical chemical formula H
2+ Fe
2o
3=Fe+H
2o, presses chemical molecular amount and calculates, and the quality of water is M2, and the molecular weight of di-iron trioxide is 160, and the molecular weight of water is 18, so M3=(80/27) M2 calculating, calculates the amount M3 of rear oxidation iron;
(6) the content M4=(M1-M3 of metal in the dreg iron)/M.
2. the method for metal Ferrum content in mensuration converter slag as claimed in claim 1, is characterized in that: the hydrogen reducing device in step (4) is comprised of the soda-lime bottle connecting 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 ℃; Finally the water vapor of generation is collected by condenser pipe, taken weight M2.
3. the method for metal Ferrum content in mensuration converter slag as claimed in claim 1, is characterized in that: in step (3) magnet adsorption to slag specimen be metallic iron and Fe
3o
4.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502558A (en) * | 2014-12-18 | 2015-04-08 | 本钢板材股份有限公司 | Method for detecting iron content of steel slag by utilizing electroslag remelting |
| 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 |
| CN112378946A (en) * | 2020-09-29 | 2021-02-19 | 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 |
Families Citing this family (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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| US6409793B1 (en) * | 1999-04-22 | 2002-06-25 | “Holderbank” Financiere Glarus AG | Method for processing steel slags containing chromium |
| JP2010261101A (en) * | 2009-04-07 | 2010-11-18 | Mitsutaka Hino | Method for producing metallic iron |
| JP2012007189A (en) * | 2010-06-22 | 2012-01-12 | Jfe Steel Corp | Method for recovering iron and phosphorus from steelmaking slag, blast furnace slag fine powder or blast furnace slag cement, and phosphate resource raw material |
| 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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2013
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Patent Citations (5)
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| US6409793B1 (en) * | 1999-04-22 | 2002-06-25 | “Holderbank” Financiere Glarus AG | Method for processing steel slags containing chromium |
| JP2010261101A (en) * | 2009-04-07 | 2010-11-18 | Mitsutaka Hino | Method for producing metallic iron |
| JP2012007189A (en) * | 2010-06-22 | 2012-01-12 | Jfe Steel Corp | Method for recovering iron and phosphorus from steelmaking slag, blast furnace slag fine powder or blast furnace slag cement, and phosphate resource raw material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502558A (en) * | 2014-12-18 | 2015-04-08 | 本钢板材股份有限公司 | Method for detecting iron content of steel slag by utilizing electroslag remelting |
| 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 |
| CN112378946A (en) * | 2020-09-29 | 2021-02-19 | 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 |
| 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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| CN103558108B (en) | 2016-03-30 |
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