CN109554535A - A method of iron is recycled using red mud and copper ashes tailings comprehensive - Google Patents
A method of iron is recycled using red mud and copper ashes tailings comprehensive Download PDFInfo
- Publication number
- CN109554535A CN109554535A CN201910026904.4A CN201910026904A CN109554535A CN 109554535 A CN109554535 A CN 109554535A CN 201910026904 A CN201910026904 A CN 201910026904A CN 109554535 A CN109554535 A CN 109554535A
- Authority
- CN
- China
- Prior art keywords
- red mud
- iron
- copper ashes
- magnetic separation
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of method using red mud and copper ashes tailings comprehensive recycling iron, belongs to technical field of beneficiation.This method is added pressure ball after reducing agent and additive, then roasts at 1100~1300 DEG C using red mud and copper ashes tailing as raw material, after roasted ore room temperature is cooling, by ore grinding, magnetic separation, obtains powdery reduced iron.Wherein, the mass ratio of red mud and copper ashes tailing is 2:3, copper ashes in copper ashes tailing, grey mine, dedusting ash mass ratio be 1:1:2, reducing agent used is coal, dosage is the 5~20% of material quality, additive is bentonite and starch, and bentonite consumption is the 3~8% of material quality, and starch dosage is the 0.5~2% of material quality.This method can recycle iron from waste, realize the effective use of waste.
Description
Technical field
The present invention relates to technical field of beneficiation, particularly relate to a kind of side using red mud and copper ashes tailings comprehensive recycling iron
Method.
Background technique
Red mud is to produce the fines strong basicity solid waste generated in alumina process by raw material of bauxite, because containing
There are a large amount of iron oxide and takes on a red color, therefore referred to as red mud, the quantum of output of red mud, due to the grade of ore, production method, technical level
It is different.Most of every production 1t aluminium oxide of factory while output 0.8~1.5t red mud, red mud mainly takes different modes at present
Stockpiling, the red mud for accumulating stockpiling is more than 3.5 hundred million tons, not only occupies a large amount of soils, also serious pollution is caused to environment, to heap
The management for depositing red mud is also required to spend a large amount of manpower and material resources, contains many useful metal elements in red mud, this also results in money
The waste in source.So that red mud is obtained effectively comprehensive utilization and has become global problem.
Meanwhile the secondary resource amount of China's copper ashes tailing is huge, national copper ashes tailings discharging is about according to statistics, between 2007
It is 2,400,000,000, and year quantum of output is in increased trend year by year.A large amount of copper ashes tailing accumulation, not only causes the waste of resource,
Important pollution is produced to environment.
Dedusting ash is the trade waste unavoidably to be generated in iron and steel enterprise's production, contains a large amount of iron in dedusting ash
And carbon will cause the serious waste of resource if not being used.Many researchs existing for the recycling of dedusting ash at present, greatly
Part is to recycle iron content dedusting ash as raw materials for sintering, but it is born and influences not ignoring, including dedusting ash product
Kind, quantity are more, and complicated component difference is big, it is difficult to accomplish quantitative ingredient, cause sinter materialization performance indicator to decline, and dedusting
Grey sintering character is poor, and the enrichment of element such as K, Na endanger sintered ironmaking production in dedusting ash, and pallet is caused to paste castor item, blower leaf
The problems such as piece hangs mud, and dust collector efficiency reduces, and smoke contamination aggravates, and plant maintenance amount increases.
At present in all research, though being studied the recycling of above-mentioned waste, the reality of comprehensive utilization is had no
How example, comprehensively utilize, and effectively recycling useful metal therein is the problem that ore dressing worker needs to solve.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of methods using red mud and copper ashes tailings comprehensive recycling iron.
It is as follows that the method comprising the steps of:
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing,
Pressure ball obtains pellet；
(2) it roasts: pellet obtained in step (1) being roasted into 90-180min at 1100~1200 DEG C, roasting is completed
Afterwards, room temperature is cooling, obtains roasted ore；
(3) mill ore magnetic selection: carrying out two stage grinding, two stages of magnetic separation for roasted ore obtained in step (2), obtains powdery reduction
Iron.
The mass ratio of red mud and copper ashes tailing is 2:3, copper ashes, grey mine, the matter of dedusting ash in copper ashes tailing in step (1)
Amount is than being 1:1:2；Iron grade is 40-50% in red mud, and moisture content is 15-20% in red mud, and sulphur and phosphorus content are respectively less than in red mud
0.1%；Grey mine is electroslag.
Reducing agent is coal in step (1), and reducing agent dosage is the 5-20% of material quality；Wherein, carbon content is fixed in coal
75-85%, content of ashes 12%, volatilization are divided into 3-6%, outer water less than 10%, Lower heat value 5500, sulfur content less than 0.5%.
Additive is bentonite and starch in step (1), and bentonite consumption is the 3-8% of material quality, and starch dosage is
The 0.5-2% of material quality.
The moisture of gained pellet is 10-15% in step (1), and it is not broken that pellet strength meets 1 meter of freely falling body.
Iron grade 35-45% in copper ashes, sulphur and phosphorus content are respectively less than 0.1%, and copper content is less than 0.3%；During grey mine is
Iron grade 25-35%, sulfur content is less than 0.1%, and phosphorus content is less than 0.35%.
Dedusting ash includes pipeline ash and gravitational dust, and Iron grade is greater than 36% in dedusting ash, and less than 0.1%, sulphur contains phosphorus content
Amount is less than 0.4%.
Primary grinding ore pulp mass concentration is 68% in step (3), and ore milling product granularity is that -0.045mm accounts for 15-25%,
Carry out a magnetic separation after primary grinding, a magnetic separation magnetic field strength is 3000GS, obtain the rough concentrate of a magnetic separation, rough concentrate into
Row secondary grinding, secondary grinding ore pulp mass concentration are 65%, and secondary grinding product granularity is that -0.045mm accounts for 35-45%, two
Secondary magnetic separation is carried out after secondary ore grinding, secondary magnetic separation magnetic field strength is 1600GS.
Powder reduction iron Iron grade is obtained in step (3) greater than 90%, iron recovery is higher than 88%.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, by reduction roasting, ore grinding, magnetic separation, red mud, copper tailing are comprehensively utilized, effectively recycled
Metallic iron therein, and obtained powder reduction iron Iron grade is high, and the rate of recovery is high；Process is simple, it is easy to accomplish, ring
Border is friendly.
Detailed description of the invention
Fig. 1 is the method and process flow chart of the invention that iron is recycled using red mud and copper tailings comprehensive.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of method using red mud and copper ashes tailings comprehensive recycling iron.
As shown in Figure 1, that the method comprising the steps of is as follows:
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing,
Pressure ball obtains pellet；
(2) it roasts: pellet obtained in step (1) being roasted into 90-180min at 1100-1200 DEG C, roasting is completed
Afterwards, room temperature is cooling, obtains roasted ore；
(3) mill ore magnetic selection: roasted ore obtained in step (2) is subjected to two stage grinding, two stages of magnetic separation, obtains powder reduction
Iron.
It is explained combined with specific embodiments below.
Embodiment 1
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing,
Pressure ball obtains pellet；Wherein, red mud dosage 400g, copper ashes dosage 150g, grey is mining amount 150g, dedusting ash use gravity
Ash, dedusting ash dosage 300g, reducing agent are coal, dosage 50g, and additive is bentonite and starch, wherein bentonite consumption is
40g, starch dosage are 6g, and when pressure ball adds water 30g；Red mud, copper ashes and gravity ash component are as follows:
1 red mud of table, copper ashes and gravitational dust main chemical compositions
(2) it roasts: pellet obtained in step (1) being roasted into 90min at 1200 DEG C, after the completion of roasting, room temperature is cold
But, roasted ore is obtained；
(3) mill ore magnetic selection: roasted ore obtained in step (2) is subjected to two stage grinding, two stages of magnetic separation, obtains powder reduction
Iron.Wherein, primary grinding ore pulp mass concentration is 68%, and ore milling product granularity is that -0.045mm accounts for 20%, and primary grinding is laggard
Magnetic separation of row, a magnetic separation magnetic field strength are 3000GS, obtain the rough concentrate of a magnetic separation, and rough concentrate carries out secondary grinding,
Secondary grinding ore pulp mass concentration is 65%, and secondary grinding product granularity is that -0.045mm accounts for 40%, carries out two after secondary grinding
Secondary magnetic separation, secondary magnetic separation magnetic field strength are 1600GS.Obtained powder reduction iron Iron grade is 90.58%, iron recovery
88.25%.
Embodiment 2
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing,
Pressure ball obtains pellet；Wherein, red mud dosage 400g, copper ashes dosage 150g, grey is mining amount 150g, dedusting ash use gravity
Ash, dedusting ash dosage 300g, reducing agent are coal, and dosage 200g, additive is bentonite and starch, wherein bentonite consumption
For 80g, starch dosage is 5g, and when pressure ball adds water 150g；Red mud, copper ashes and gravity ash component are as follows:
2 red mud of table, copper ashes and gravitational dust main chemical compositions
(2) it roasts: pellet obtained in step (1) being roasted into 180min at 1100 DEG C, after the completion of roasting, room temperature is cold
But, roasted ore is obtained；
(3) mill ore magnetic selection: roasted ore obtained in step (2) is subjected to two stage grinding, two stages of magnetic separation, obtains powder reduction
Iron.Wherein, primary grinding ore pulp mass concentration is 68%, and ore milling product granularity is that -0.045mm accounts for 25%, and primary grinding is laggard
Magnetic separation of row, a magnetic separation magnetic field strength are 3000GS, obtain the rough concentrate of a magnetic separation, and rough concentrate carries out secondary grinding,
Secondary grinding ore pulp mass concentration is 65%, and secondary grinding product granularity is that -0.045mm accounts for 45%, carries out two after secondary grinding
Secondary magnetic separation, secondary magnetic separation magnetic field strength are 1600GS.Obtained powder reduction iron Iron grade is 90.86%, iron recovery
91.45%.
Embodiment 3
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing,
Pressure ball obtains pellet；Wherein, red mud dosage 400g, copper ashes dosage 150g, grey is mining amount 150g, dedusting ash use pipeline
Ash, dedusting ash dosage 300g, reducing agent are coal, and dosage 100g, additive is bentonite and starch, wherein bentonite consumption
For 50g, starch dosage is 10g, and when pressure ball adds water 120g；Red mud, copper ashes and pipeline ash component are as follows:
3 red mud of table, copper ashes and pipeline ash main chemical compositions
(2) it roasts: pellet obtained in step (1) being roasted into 120min at 1150 DEG C, after the completion of roasting, room temperature is cold
But, roasted ore is obtained；
(3) mill ore magnetic selection: roasted ore obtained in step (2) is subjected to two stage grinding, two stages of magnetic separation, obtains powder reduction
Iron.Wherein, primary grinding ore pulp mass concentration is 68%, and ore milling product granularity is that account for 20%) primary grinding laggard by -0.045mm
Magnetic separation of row, a magnetic separation magnetic field strength are 3000GS, obtain the rough concentrate of a magnetic separation, and rough concentrate carries out secondary grinding,
Secondary grinding ore pulp mass concentration is 65%, and secondary grinding product granularity is that -0.045mm accounts for 40%, carries out two after secondary grinding
Secondary magnetic separation, secondary magnetic separation magnetic field strength are 1600GS.Obtained powder reduction iron Iron grade is 90.35%, iron recovery
90.21%.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of method using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: comprise the following steps that
(1) mixing pressure ball: using red mud and copper ashes tailing as raw material, being added reducing agent, additive and water, after mixing, pressure ball,
Obtain pellet；
(2) it roasts: pellet obtained in step (1) is roasted into 50-90min at 1100~1300 DEG C, after the completion of roasting, room
Temperature is cooling, obtains roasted ore；
(3) mill ore magnetic selection: roasted ore obtained in step (2) is subjected to two stage grinding, two stages of magnetic separation, obtains powdery reduced iron.
2. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly the mass ratio of red mud and copper ashes tailing is 2:3 in (1), copper ashes in copper ashes tailing, grey mine, dedusting ash mass ratio be 1:1:
2；Iron grade is 40-50% in red mud, and moisture content is 15-20% in red mud, and sulphur and phosphorus content are respectively less than 0.1% in red mud；Grey
Mine is electroslag.
3. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly reducing agent is coal in (1), and reducing agent dosage is the 5-20% of material quality；Wherein, carbon content 75-85%, ash are fixed in coal
Point content 12%, volatilization are divided into 3-6%, outer water less than 5500 kilocalories of 10%, Lower heat value, sulfur content less than 0.5%.
4. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly additive is bentonite and starch in (1), and bentonite consumption is the 3-8% of material quality, and starch dosage is material quality
0.5-2%.
5. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly the moisture of gained pellet is 10-15% in (1), and it is not broken that pellet strength meets 1 meter of freely falling body.
6. the method according to claim 2 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the copper
Iron grade 35-45% in slag, sulphur and phosphorus content are respectively less than 0.1%, and copper content is less than 0.3%；Grey mine is middle Iron grade 25-
35%, sulfur content is less than 0.1%, and phosphorus content is less than 0.35%.
7. the method according to claim 2 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: described to remove
Dust includes pipeline ash and gravitational dust, and Iron grade is greater than 36% in dedusting ash, and less than 0.1%, sulfur content is less than phosphorus content
0.4%.
8. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly primary grinding ore pulp mass concentration is 68% in (3), and ore milling product granularity is that -0.045mm accounts for 15-25%, after primary grinding
A magnetic separation is carried out, a magnetic separation magnetic field strength is 3000GS, obtains the rough concentrate of a magnetic separation, and rough concentrate carries out secondary grinding
Mine, secondary grinding ore pulp mass concentration are 65%, and secondary grinding product granularity is that -0.045mm accounts for 35-45%, after secondary grinding
Secondary magnetic separation is carried out, secondary magnetic separation magnetic field strength is 1600GS.
9. the method according to claim 1 using red mud and copper ashes tailings comprehensive recycling iron, it is characterised in that: the step
Suddenly the Iron grade that powdery reduced iron is obtained in (3) is greater than 90%, and iron recovery is higher than 88%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026904.4A CN109554535A (en) | 2019-01-11 | 2019-01-11 | A method of iron is recycled using red mud and copper ashes tailings comprehensive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026904.4A CN109554535A (en) | 2019-01-11 | 2019-01-11 | A method of iron is recycled using red mud and copper ashes tailings comprehensive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109554535A true CN109554535A (en) | 2019-04-02 |
Family
ID=65872737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910026904.4A Pending CN109554535A (en) | 2019-01-11 | 2019-01-11 | A method of iron is recycled using red mud and copper ashes tailings comprehensive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109554535A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480859A (en) * | 2022-01-04 | 2022-05-13 | 中南大学 | Method for cooperatively utilizing all components of red mud and iron ore sintering dedusting ash |
| CN114669393A (en) * | 2022-04-02 | 2022-06-28 | 楚源高新科技集团股份有限公司 | Comprehensive recycling process for chemical byproduct iron mud |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051428A (en) * | 2011-01-20 | 2011-05-11 | 西安建筑科技大学 | Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag |
| CN105018722A (en) * | 2015-08-12 | 2015-11-04 | 唐竹胜 | Method for separating and reducing iron powder from refractory mineral, complex ore and iron-containing waste materials |
| CN105177295A (en) * | 2015-08-04 | 2015-12-23 | 江苏省冶金设计院有限公司 | Comprehensive treatment method for red mud and copper slag |
| CN106676263A (en) * | 2016-12-13 | 2017-05-17 | 江苏省冶金设计院有限公司 | Method and system for comprehensive utilization of copper tailings and converter coarse dust ash |
| CN106755981A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | A kind of method that utilization iron ore mine produces metallized pellet |
| CN107287367A (en) * | 2016-03-31 | 2017-10-24 | 鞍钢股份有限公司 | A kind of method that utilization iron red mud reclaims iron |
-
2019
- 2019-01-11 CN CN201910026904.4A patent/CN109554535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051428A (en) * | 2011-01-20 | 2011-05-11 | 西安建筑科技大学 | Iron extracting and steelmaking process for comprehensively treating copper ore tailing and nickel molten slag |
| CN105177295A (en) * | 2015-08-04 | 2015-12-23 | 江苏省冶金设计院有限公司 | Comprehensive treatment method for red mud and copper slag |
| CN105018722A (en) * | 2015-08-12 | 2015-11-04 | 唐竹胜 | Method for separating and reducing iron powder from refractory mineral, complex ore and iron-containing waste materials |
| CN107287367A (en) * | 2016-03-31 | 2017-10-24 | 鞍钢股份有限公司 | A kind of method that utilization iron red mud reclaims iron |
| CN106755981A (en) * | 2016-11-25 | 2017-05-31 | 江苏省沙钢钢铁研究院有限公司 | A kind of method that utilization iron ore mine produces metallized pellet |
| CN106676263A (en) * | 2016-12-13 | 2017-05-17 | 江苏省冶金设计院有限公司 | Method and system for comprehensive utilization of copper tailings and converter coarse dust ash |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480859A (en) * | 2022-01-04 | 2022-05-13 | 中南大学 | Method for cooperatively utilizing all components of red mud and iron ore sintering dedusting ash |
| CN114480859B (en) * | 2022-01-04 | 2024-05-07 | 中南大学 | Method for utilizing all components of red mud and iron ore sintering dust in cooperation |
| CN114669393A (en) * | 2022-04-02 | 2022-06-28 | 楚源高新科技集团股份有限公司 | Comprehensive recycling process for chemical byproduct iron mud |
| CN114669393B (en) * | 2022-04-02 | 2024-03-29 | 楚源高新科技集团股份有限公司 | Comprehensive recycling process for chemical by-product iron mud |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101413055B (en) | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore | |
| CN109013051B (en) | Method and device for producing high-nickel alloy by coal-based direct reduction and magnetic separation | |
| CN101798113B (en) | Metallurgical method for extracting vanadium pentexide from low-grade stone coal vanadium ores | |
| CN104911356A (en) | Comprehensive recovery technology of solid waste gas ash and zinc-containing ferrovanadium slag | |
| CN103757200B (en) | Method for separating and enriching ferronickel from laterite-nickel ore | |
| CN101413053B (en) | Additive for strengthening reduction and separation of laterite-nickel ore | |
| CN103255255A (en) | Gas-based shaft furnace direct reduction-electric furnace smelting separation process of vanadium titano-magnetite | |
| CN103468936A (en) | Difficult-separation iron ore tailing pelletizing rotary kiln magnetic roasting treatment technology | |
| CN107619946A (en) | A kind of blast furnace flue gas dedusting ash method of comprehensive utilization | |
| CN108380360B (en) | Production process of steel slag and iron fine powder | |
| CN109536729A (en) | A kind of utilization method for the dedusting ash that smelting iron and steel generates | |
| CN102703714A (en) | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust | |
| CN104532007A (en) | Method for comprehensively utilizing electric field dust-removal ash at head end of sintering machine and blast furnace gas ash | |
| CN109576487A (en) | A method of iron is recycled using red mud and dedusting ash mixing reduction roasting magnetic separation | |
| CN107082429A (en) | A kind of method that utilization Dust of Iron And Steel Works prepares cementite | |
| CN107858520A (en) | A kind of processing system and method for sintering dust | |
| CN109554535A (en) | A method of iron is recycled using red mud and copper ashes tailings comprehensive | |
| CN102839281B (en) | Rotary hearth furnace direct-reduction is utilized to produce the method for blast furnace protecting titaniferous metallized pellet | |
| CN104120207B (en) | One joins the raw ferriferous method in ore deposit with tin tail iron ore concentrate and the poor assorted ore deposit of high harmful element | |
| CN108396138A (en) | A kind of method of vanadium titano-magnetite concentration and separation | |
| CN107604110A (en) | A kind of method that iron is selected from blast furnace dust | |
| CN104263870B (en) | The many gradient extraction technology for extracting of v-ti magnetite concentrate direct-reduction | |
| CN103555930A (en) | Method for reduction roasting of high-magnesium poor-quality nickel laterite | |
| CN111057854B (en) | Treatment method of metal tailings | |
| CN105177212A (en) | Solid-state reduction method for iron-containing materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190402 |