CN104593601A - Process for recycling iron in semi-iron sand wastes - Google Patents
Process for recycling iron in semi-iron sand wastes Download PDFInfo
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- CN104593601A CN104593601A CN201410837930.2A CN201410837930A CN104593601A CN 104593601 A CN104593601 A CN 104593601A CN 201410837930 A CN201410837930 A CN 201410837930A CN 104593601 A CN104593601 A CN 104593601A
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- iron
- corundum
- iron powder
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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 relates to a process for recovering iron and particularly relates to a process for recycling iron in semi-iron sand wastes. The process comprises the following steps: step a, pulverizing the semi-iron sand wastes into particles, and putting the particles into a magnetic separator for magnetic separation to select iron powder; step b, putting iron powder selected in the step a into the magnetic separator for magnetic separation; step c, carrying out high temperature processing on high-purity corundum obtained in the step b; step d, putting high-purity corundum obtained in the step c and subjected to high temperature processing into a magnetic separator for magnetic separation; and step e, adding high-purity iron powder obtained in step b into a high-temperature furnace for melting, adding alloying elements according to the needs and refining into an alloy. The recycling of the semi-iron sand wastes is achieved, the atmosphere environmental pollution caused by the semi-iron sand wastes is decreased, the area occupation of the semi-iron sand wastes is reduced and meanwhile, the additional economic benefits are obtained and the recycling of the wastes is achieved.
Description
Technical field
The present invention relates to a kind of iron recovery process, particularly relate to the recycling technique of iron in a kind of half iron sand waste material.
Background technology
Brown Alundum, it is the brown diamantine obtained through melting reduction in electric furnace with alumina, carbon materials, iron filings three kinds of raw materials, its Application Areas is very wide, with the grinding tool that it is made, be suitable for the metal that grinding anti-tensile is higher, as various general steel, malleable iron, hard bronze etc., also high grade refractory can be manufactured.Due in the process used, often need to carry out processing repeatedly, thus create a lot of waste material, this waste material is called as tankage, and because wherein iron content is higher, be otherwise known as half iron sand waste material.
According to industry statistic, the annual Brown Alundum of China about 1,600,000 tons, wherein one-level calculates by 3 percent, within 1 year, just has 4.5 ten thousand tons, if add that secondary Brown Alundum, sub-white corundum, white fused alumina, black corundum, single alundum, silicon carbide etc. are exactly a very surprising numeral.The husky waste material of this half iron, by long-term stacking, causes very large waste to manufacturing enterprise, because this waste material is the mixed powder of a millimeter to zero, allly also causes very large pressure to corporate environment.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, and the recycling technique of iron in a kind of half iron sand waste material is provided.
The technical solution adopted in the present invention: the recycling technique of iron in a kind of half iron sand waste material, is characterized in that: comprise the following steps:
Step a, half iron sand waste powder is broken into particulate state, then puts in magnetic separator and carry out magnetic separation, select iron powder wherein, now in iron powder containing corundum;
Step b, the iron powder magneticly elected by step a are put in magnetic separator, carry out magnetic separation, are separated by iron powder with corundum, obtain high-purity iron powder and high purity corundum;
Step c, the high purity corundum obtained in step b is put into temperature is carry out pyroprocessing under the environment of 450 DEG C ~ 560 DEG C;
Steps d, the high purity corundum through subzero treatment in step c put in magnetic separator and carries out magnetic separation, the Armco magnetic iron in sub-department's high purity corundum;
Step e, join in High Temperature Furnaces Heating Apparatus melt obtaining high-purity iron powder in step b, add alloying element as required, refine into alloy.
The iron-holder of the high-purity iron powder obtained in described step b is 85% ~ 92%, and in high purity corundum, corundum content is not less than 95.2%.
In described step c, the time of pyroprocessing is 0.4 ~ 2h.
Beneficial effect of the present invention: the inventive method achieves the recycling of double iron sand waste material, reduce half iron sand waste material to the pollution of atmospheric environment, decrease the floor space of half iron sand waste material, obtain extra economic benefit simultaneously, achieve the re-using of waste material.
Embodiment
A recycling technique for iron in half iron sand waste material, is characterized in that: comprise the following steps:
Step a, half iron sand waste powder is broken into particulate state, then puts in magnetic separator and carry out magnetic separation, select iron powder wherein, now in iron powder containing corundum;
Step b, the iron powder magneticly elected by step a are put in magnetic separator, carry out magnetic separation, are separated by iron powder with corundum, by the time high-purity iron powder and high purity corundum, and the iron-holder of high-purity iron powder is 85% ~ 92%, and in high purity corundum, corundum content is not less than 95.2%;
Step c, the high purity corundum obtained in step b is put into temperature is carry out pyroprocessing under the environment of 450 DEG C ~ 560 DEG C, and the treatment time is 0.4 ~ 2h;
Steps d, the high purity corundum through subzero treatment in step c put in magnetic separator and carries out magnetic separation, the Armco magnetic iron in sub-department's high purity corundum;
Step e, join in High Temperature Furnaces Heating Apparatus melt obtaining high-purity iron powder in step b, add alloying element as required, refine into alloy, as wish refining synthetic cast iron alloy, can refine routinely cast iron alloy need add carbon and silicon, then conveniently cast iron alloy refining step refining synthetic cast iron alloy.
Claims (3)
1. the recycling technique of iron in half iron sand waste material, is characterized in that: comprise the following steps:
Step a, half iron sand waste powder is broken into particulate state, then puts in magnetic separator and carry out magnetic separation, select iron powder wherein, now in iron powder containing corundum;
Step b, the iron powder magneticly elected by step a are put in magnetic separator, carry out magnetic separation, are separated by iron powder with corundum, by the time high-purity iron powder and high purity corundum;
Step c, the high purity corundum obtained in step b is put into temperature is carry out pyroprocessing under the environment of 450 DEG C ~ 560 DEG C;
Steps d, the high purity corundum through subzero treatment in step c put in magnetic separator and carries out magnetic separation, the Armco magnetic iron in sub-department's high purity corundum;
Step e, join in High Temperature Furnaces Heating Apparatus melt obtaining high-purity iron powder in step b, add alloying element as required, refine into alloy.
2. the recycling technique of iron in half iron sand waste material according to claim 1, is characterized in that: the iron-holder of the high-purity iron powder obtained in described step b is 85% ~ 92%, and in high purity corundum, corundum content is not less than 95.2%.
3. the recycling technique of iron in half iron sand waste material according to claim 1, is characterized in that: in described step c, the time of pyroprocessing is 0.4 ~ 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837930.2A CN104593601A (en) | 2014-12-26 | 2014-12-26 | Process for recycling iron in semi-iron sand wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837930.2A CN104593601A (en) | 2014-12-26 | 2014-12-26 | Process for recycling iron in semi-iron sand wastes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104593601A true CN104593601A (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410837930.2A Pending CN104593601A (en) | 2014-12-26 | 2014-12-26 | Process for recycling iron in semi-iron sand wastes |
Country Status (1)
| Country | Link |
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| CN (1) | CN104593601A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3295924A (en) * | 1961-10-24 | 1967-01-03 | Montedison Spa | Process for recovering iron, titanium and aluminum from the red slurries obtained in processing bauxite by the bayer process |
| DD127945A1 (en) * | 1976-10-25 | 1977-10-19 | Siegfried Richter | PROCESS FOR PROCESSING COOL SCRAP |
| US5961055A (en) * | 1997-11-05 | 1999-10-05 | Iron Dynamics, Inc. | Method for upgrading iron ore utilizing multiple magnetic separators |
-
2014
- 2014-12-26 CN CN201410837930.2A patent/CN104593601A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3295924A (en) * | 1961-10-24 | 1967-01-03 | Montedison Spa | Process for recovering iron, titanium and aluminum from the red slurries obtained in processing bauxite by the bayer process |
| DD127945A1 (en) * | 1976-10-25 | 1977-10-19 | Siegfried Richter | PROCESS FOR PROCESSING COOL SCRAP |
| US5961055A (en) * | 1997-11-05 | 1999-10-05 | Iron Dynamics, Inc. | Method for upgrading iron ore utilizing multiple magnetic separators |
Non-Patent Citations (2)
| Title |
|---|
| 熊大和: "SLon磁选机在淮北煤系高岭土除铁中的应用", 《非金属矿》 * |
| 谢跃进等: "棕刚玉磨料磁选设备选型浅谈", 《金刚石与磨料磨具工程》 * |
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Application publication date: 20150506 |
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