CN112808451B - Method for preparing heavy medium powder for high-performance coal dressing with different specifications in gradient manner by refractory sulfuric acid cinder - Google Patents
Method for preparing heavy medium powder for high-performance coal dressing with different specifications in gradient manner by refractory sulfuric acid cinder Download PDFInfo
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- CN112808451B CN112808451B CN202110175718.4A CN202110175718A CN112808451B CN 112808451 B CN112808451 B CN 112808451B CN 202110175718 A CN202110175718 A CN 202110175718A CN 112808451 B CN112808451 B CN 112808451B
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- 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
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- 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
- B03C1/002—High gradient magnetic separation
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- 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
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
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Abstract
A method for preparing dense medium powder for high-performance coal dressing with different specifications by refractory sulfuric acid cinder step relates to the field of comprehensive utilization and environmental protection of solid waste, and the refractory sulfuric acid cinder step which is difficult to be used for steel smelting is prepared into dense medium powder for high-performance coal dressing with different specifications, so that the comprehensive utilization of the solid waste is realized, the influence of the solid waste on the environment is reduced, waste is turned into wealth, and the treatment method comprises the following steps: (1) preparing roasting raw materials from refractory sulfuric acid cinder; (2) magnetizing and roasting in a suspended state in time; (3) preparing dense medium powder for coal dressing with different specifications in a roasting ore step manner; (4) the high-performance coal preparation is prepared by using heavy medium powder. The invention can obtain 5 kinds of high-performance dense medium powder for coal dressing with different qualities, and satisfies the condition that the true density is more than 4.5 g cm ‑3 The magnetic content is more than 95 percent, the composition content of-45 mu m is more than 80 percent, and the external moisture content is less than 8 percent and the sulfur content is less than 3 percent.
Description
Technical Field
A method for preparing high-performance dense medium powder for coal dressing with different specifications by using refractory sulfuric acid cinder in a gradient manner relates to the field of comprehensive utilization and environmental protection of solid wastes, and the refractory sulfuric acid cinder is prepared into the high-performance dense medium powder for coal dressing by using the gradient manner, so that the comprehensive utilization of iron resources is realized, the influence of the solid wastes on the environment is reduced, and the waste precious is changed.
Background
The sulfuric acid cinder is waste residue from the roasting of pyrite to produce sulfuric acid, and contains great amount of ferric oxide resource, and the ferric oxide is converted from ferric sulfide through roasting. Therefore, only a few of the rare-earth-doped iron ore powder has coarse granularity and simple co-associated relation, can produce the magnetite powder meeting the requirements of iron and steel smelting enterprises through a simple magnetic separation process, is recycled by the acid making enterprises through a magnetizing roasting-magnetic separation process, and is mostly used for cement and building material raw materials, so that the waste of iron resources is caused. Therefore, a low-cost and environment-friendly method is urgently needed to realize the comprehensive utilization of refractory sulfuric acid cinder.
The national standard requirement of the dense medium powder for coal dressing needs to meet the requirement that the true density is more than 4.5 g cm -3 The magnetic content is more than 95%, the external moisture content is less than 8%, the sulfur content is less than 3%, and the requirements of certain granularity are met; while the iron concentrate product produced by refractory sulfuric acid cinder can not meet the national standard of iron concentrate of iron and steel smelting enterprises, but can meet the requirement of dense medium powder for coal dressing.
The magnetic agglomeration, non-selective adsorption and other effects generated in the coal preparation process of the heavy medium powder are very easy to cause the phenomena of unstable medium density, aggravated heavy consumption and the like in the coal preparation process, so that the heavy medium powder for conventional coal preparation is necessary to be modified, the heavy medium powder with high dispersion performance is obtained, the stability of the medium density in the coal preparation process is improved, and the consumption of the heavy medium powder is reduced.
The existing refractory sulfuric acid cinder utilization method developed by taking iron concentrate for steel smelting with high grade and low impurity content as a target has the characteristics of high cost, complex process and the like, and is not beneficial to the comprehensive utilization of the refractory sulfuric acid cinder with low cost, low energy consumption, safety and environmental protection.
The invention discloses a method for preparing high-performance dense medium powder for coal dressing with different specifications in a gradient manner by refractory sulfuric acid cinder, which aims at producing the high-performance dense medium powder for coal dressing, and develops a low-cost, low-energy-consumption, safe and environment-friendly method for preparing the refractory sulfuric acid cinder in a gradient manner and the high-performance dense medium powder, so that the low-cost, low-energy-consumption, safe and environment-friendly dense medium powder for coal dressing with high dispersion performance is realized.
Disclosure of Invention
Aiming at the practical problems that the existing technology for producing iron ore concentrate by refractory sulfuric acid cinder aims at obtaining the iron ore concentrate for iron and steel smelting with high grade and low impurity content, and the refractory sulfuric acid cinder utilization method and the iron ore concentrate produced by refractory sulfuric acid cinder are difficult to meet the raw material requirements of iron and steel smelting enterprises, and the requirements that the high-dispersion-performance dense medium powder is urgently needed in the coal dressing process to improve the stability of medium density in the coal dressing process and reduce the consumption of the dense medium powder are developed. The invention aims to provide a method for preparing high-performance dense medium powder for coal dressing with different specifications in a gradient manner by using refractory sulfuric acid cinder, which takes the preparation of modified dense medium powder for coal dressing with different specifications in a gradient manner as a new target, and invents a novel process for preparing the refractory sulfuric acid cinder in a gradient manner and modifying the dense medium powder, which is low in cost, low in energy consumption, safe and environment-friendly, and not only solves the problem of iron resource loss in the refractory sulfuric acid cinder, but also brings certain economic benefit to enterprises and changes waste into valuable; and various high-dispersion heavy medium powders are obtained, so that the stability of the medium density in the coal preparation process is improved, and the consumption of the heavy medium powders is reduced.
In order to achieve the above task, the present invention adopts the following technical solutions.
The invention relates to a method for preparing heavy medium powder for coal dressing with different specifications and high performance in steps by refractory sulfuric acid cinder, which comprises the steps of (1) preparing roasting raw materials by refractory sulfuric acid cinder; (2) timely magnetizing and roasting in a suspended state; (3) Preparing dense medium powder for coal dressing with different specifications in a roasting ore step manner; (4) The preparation method comprises four steps of preparing high-performance dense medium powder for coal dressing.
The roasting raw material prepared from the refractory sulfate cinder is characterized in that the refractory sulfate cinder is ground into powder by adopting dry grinding until the content of-100 meshes accounts for 100%, wherein the refractory sulfate cinder is from waste residues generated in the process of roasting pyrite to prepare sulfuric acid.
The (2) suspended state timely magnetizing roasting is characterized in that a suspended state decomposing furnace with a preheating system and a multi-stage cyclone negative pressure cooling system is adopted for timely magnetizing roasting, and weak magnetic alpha, beta and sigma type ferric oxide in roasting raw materials is reduced into one or a mixture of ferroferric oxide or gamma type ferric oxide; wherein the temperature of magnetization and calcination in a suspended state is 550-900 ℃, the calcination time is 1-60 seconds, the concentration of carbon monoxide in the reducing atmosphere is 1-15%, and the oxygen content is less than 5%.
The (3) preparation of dense medium powder for coal dressing by roasting ore steps is characterized in that the magnetic field strength is controlled to be 300 Oe-1500 Oe, the strong magnetic minerals in the roasted ore are subjected to step recovery from low to high, and partial step recovery products are prepared into dense medium powder for coal dressing with different specifications according to a certain proportion. The method comprises the following steps:
(1) the first step recovery, the magnetic field intensity of 300 Oe-500 Oe is adopted to carry out 1 coarse and 1 fine magnetic separation treatment on the ferromagnetic ore, the magnetic concentrate is 1# heavy medium powder ore pulp, and the magnetic tailings and middlings are combined and then used as the second step utilization raw material;
(2) the second step recovery, firstly carrying out grinding treatment on the second step utilization raw materials, then carrying out 1 coarse and 1 fine magnetic separation treatment on the ground ore products by adopting the magnetic field intensity of 300 Oe-500 Oe, wherein the magnetic separation concentrate is 2# heavy medium powder ore pulp, and the magnetic separation tailings and middlings are combined to be used as third step utilization raw materials, wherein the grinding fineness is controlled to be 40% -90% in content of 400 meshes;
(3) the third-step recovery, namely carrying out 1-coarse and 1-fine magnetic separation treatment on the third-step utilization raw materials by adopting the magnetic field intensity of 500 Oe-800 Oe, wherein the magnetic separation concentrate is 3# heavy medium powder ore pulp, and the magnetic separation tailings and middlings are combined to be used as fourth-step utilization raw materials;
(4) and (3) recycling in a fourth step, carrying out 1-time roughing treatment on the fourth step utilization raw material by adopting the magnetic field intensity of 800 Oe-1500 Oe, carrying out 1-time concentration treatment on rough concentrate by adopting the magnetic field intensity of 600 Oe-1200 Oe, wherein the magnetic concentrate is 4# heavy medium powder ore pulp, and combining the magnetic tailings and middlings to be used as raw materials for cement or building materials.
The preparation of the heavy medium powder for high-performance coal preparation (3) is characterized in that ore pulp of the 1# heavy medium powder, the 2# heavy medium powder, the 3# heavy medium powder and one or more of starch, dextrin, sodium humate, tannin and other dispersing agents are respectively controlled to act for 1-5 minutes in a stirring barrel, and the 1# heavy medium powder, the 2# heavy medium powder, the 3# heavy medium powder and the 4# modified heavy medium powder are obtained after concentration, filtration and suspended state drying, wherein other control variables in the stirring process are as follows: the temperature of the ore pulp is 20-50 ℃, the pH of the ore pulp is 7-12, and the total consumption of the dispersing agent is 0.001-10 kg/ton of heavy medium powder. 4 kinds of modified dense medium powder with different qualities, which is characterized in that the dense medium powder for 4 kinds of high-performance coal dressing satisfies the true density of more than 4.5 g cm -3 The magnetic content is more than 95 percent, the composition content of-45 mu m is more than 80 percent, and the external moisture content is less than 8 percent, and the sulfur content is less than 3 percent; meanwhile, the true density is from large to small:2# > 1# > 3# > 4#, the sulfur content of the catalyst is from large to small, 2# > 3# > 1# > 4#, and the composition content of-45 mu m is from large to small: 2# > 3# > 4# > 1#.
Detailed Description
Preparation of dense medium powder example 1 for different-specification high-performance coal dressing by refractory sulfuric acid cinder step
(1) The roasting ore raw materials with the content of 100 percent of 100 meshes and 60 percent of 200 meshes are prepared from the refractory sulfuric acid cinder in Henan by adopting a dry vertical mill.
(2) Tangentially feeding the roasting raw material into a suspension decomposition furnace with a preheating system and a multi-stage cyclone negative pressure cooling system for timely magnetizing roasting, controlling the timely magnetizing roasting temperature of the suspension to be 730-780 ℃, the roasting time to be 5 seconds, the concentration of carbon monoxide in the reducing atmosphere to be 5-10%, the oxygen content to be less than 1%, cooling the roasted ore to be below 100 ℃ by the multi-stage cyclone negative pressure, and cooling to room temperature in a closed storage tank.
(3) The first step recovery is carried out, the cooled roasting ore is prepared into ore pulp with the concentration of 30 percent, the ore pulp is subjected to rough concentration under the magnetic field intensity of 400Oe, the rough concentrate is subjected to concentration under the magnetic field intensity of 350 Oe, the magnetic concentrate is 1# heavy medium powder ore pulp, and the magnetic tailings and middlings are combined to be used as second step utilization raw materials.
(3) And (3) recycling in a second step, firstly carrying out ore grinding treatment on the second-step utilization raw materials, carrying out roughing under the magnetic field intensity of 500Oe, concentrating rough concentrate under the magnetic field intensity of 300 Oe, wherein the magnetic concentrate is 2# heavy medium powder ore pulp, and combining the magnetic tailings and middlings to serve as a third-step utilization raw material, wherein the fineness of the controlled ore grinding is 60% of the content of-400 meshes.
(4) And (3) recycling in a third step, roughing the second step utilization raw material under the magnetic field intensity of 750Oe, concentrating rough concentrate under the magnetic field intensity of 550 Oe, wherein the magnetic concentrate is 3# heavy medium powder ore pulp, and combining the magnetic tailings and middlings to serve as a fourth step utilization raw material.
(5) Fourth step recovery, the fourth step raw materials are roughed under the magnetic field intensity of 1500Oe, the rough concentrate is carefully chosen under the magnetic field intensity of 600 Oe, the magnetic concentrate is 4# heavy medium powder ore pulp, and the magnetic tailings and middlings are combined and can also be used as raw materials for cement or building materials with high iron content.
(6) Respectively controlling the slurry of the 1# heavy medium powder, the 2# heavy medium powder, the 3# heavy medium powder and the 4# heavy medium powder to act with starch in a stirring barrel for 2 minutes, and concentrating, filtering and suspending for drying to obtain the 1# heavy medium powder, the 2# heavy medium powder, the 3# heavy medium powder and the 4# heavy medium powder for high-performance coal dressing, wherein other control variables in the stirring process are as follows: the temperature of the ore pulp is 25 ℃, the pH of the ore pulp is 11, and the total consumption of starch is 0.5 kg/ton of dense medium powder for coal dressing.
(7) The true density of the heavy medium powder for 1# high-performance coal dressing is more than 4.5 g cm -3 The magnetic content is more than 99 percent, the composition content of-45 mu m is more than 80 percent, the external moisture content is less than 4 percent, and the sulfur content is less than 1.6 percent; the true density of the heavy medium powder for 2# high-performance coal dressing is more than 4.8 g cm -3 The magnetic content is more than 99 percent, the composition content of-45 mu m is more than 95 percent, the external moisture content is less than 6 percent, and the sulfur content is less than 0.6 percent; the true density of the heavy medium powder for 3# high-performance coal dressing is more than 4. g.cm -3 The magnetic content is more than 99 percent, the composition content of minus 45 mu m is more than 88 percent, the external moisture content is less than 5 percent, and the sulfur content is less than 0.8 percent; the true density of the heavy medium powder for 4# high-performance coal dressing is more than 4.65 g cm -3 The magnetic content is more than 99 percent, the composition content of minus 45 mu m is more than 90 percent, the external moisture content is less than 5 percent, and the sulfur content is less than 1 percent.
Preparation of dense medium powder for different-specification high-performance coal dressing from refractory sulfuric acid cinder step by step example 2
(1) The refractory sulfuric acid cinder of Shaanxi is prepared into roasting ore raw materials with 100 percent of 100 meshes and 55 percent of 200 meshes by adopting a dry vertical mill.
(2) Tangentially feeding the roasting raw material into a suspension decomposition furnace with a preheating system and a multi-stage cyclone negative pressure cooling system for timely magnetizing roasting, controlling the timely magnetizing roasting temperature of the suspension to be 800-850 ℃, the roasting time to be 10 seconds, reducing carbon monoxide concentration to be 8-13%, and oxygen content to be less than 0.5%, cooling the roasted ore to below 100 ℃ by the multi-stage cyclone negative pressure, and cooling to room temperature in a closed storage tank.
(3) And (3) carrying out first-step recovery, preparing cooled roasted ore into ore pulp with the concentration of 35%, carrying out rough concentration under the magnetic field intensity of 500Oe, concentrating rough concentrate under the magnetic field intensity of 300 Oe, wherein the magnetic concentrate is heavy medium powder ore pulp for 1# coal dressing, and combining magnetic tailings and middlings to be used as a second-step utilization raw material.
(3) And (3) recycling in a second step, firstly carrying out ore grinding treatment on the second-step utilization raw materials, carrying out roughing under the magnetic field intensity of 500Oe, concentrating rough concentrate under the magnetic field intensity of 350 Oe, wherein the magnetic concentrate is heavy medium powder ore pulp for 2# coal dressing, and combining magnetic tailings and middlings to obtain a third-step utilization raw material, wherein the fineness of the ore grinding is controlled to be-400 meshes, and the content of the ore grinding is 65%.
(4) And (3) recycling in a third step, roughing the second-step utilization raw material under the magnetic field intensity of 800Oe, concentrating rough concentrate under the magnetic field intensity of 500Oe, wherein the magnetic concentrate is heavy medium powder ore pulp for 3# coal dressing, and the magnetic tailings and middlings are combined to be used as a fourth-step utilization raw material.
(5) Fourth step recovery, the fourth step utilization raw materials roughen under 1400Oe magnetic field intensity, rough concentrate concentrates under 600 Oe magnetic field intensity, the magnetic concentrate is the 4# dense medium powder ore pulp for coal dressing, the magnetic tailings and middlings are combined to be used as high iron content cement or raw materials for building materials.
(6) The heavy medium powder ore pulp for 1# and 2# and 3# and the sodium humate are respectively controlled to act for 3 minutes in a stirring barrel, and the heavy medium powder for 1# and 2# and 3# and 4# high-performance coal is obtained after concentration, filtration and suspension drying, wherein other control variables in the stirring process are as follows: the temperature of the ore pulp is 30 ℃, the pH of the ore pulp is 12, and the total dosage of sodium humate is 1 kg/ton of dense medium powder for coal dressing.
(7) The true density of the heavy medium powder for 1# high-performance coal dressing is more than 4.5 g cm -3 The magnetic content is more than 99 percent, the composition content of-45 mu m is more than 81 percent, the external moisture content is less than 3 percent, and the sulfur content is less than 1.5 percent; the true density of the heavy medium powder for 2# high-performance coal dressing is more than 4. g.cm -3 The magnetic content is more than 99 percent, the composition content of-45 mu m is more than 97 percent, the external moisture content is less than 6 percent, and the sulfur content is less than 0.5 percent; the true density of the heavy medium powder for 3# high-performance coal dressing is more than 4. g.cm -3 The magnetic content is more than 99 percent, the composition content of-45 mu m is more than 92 percent, the external moisture content is less than 5 percent, and the sulfur content is less than 1 percent; the true density of the heavy medium powder for 4# high-performance coal dressing is larger than4.65 g·cm -3 The magnetic content is more than 99 percent, the composition content of minus 45 mu m is more than 82 percent, the external moisture content is less than 5 percent, and the sulfur content is less than 1 percent.
Claims (3)
1. The method for preparing the heavy medium powder for the high-performance coal dressing with different specifications in the step mode by using the sulfuric acid cinder is characterized by comprising the following steps of: (1) Timely magnetizing and roasting the sulfuric acid cinder based on a suspension state for modification; (2) preparing high-performance coal-dressing heavy medium powder; the modification of the sulfuric acid cinder based on the suspension state timely magnetized roasting is characterized in that firstly, dry grinding is adopted to grind the sulfuric acid cinder until the content of-100 meshes accounts for 100%; secondly, carrying out timely magnetizing roasting by adopting a suspension state decomposing furnace with a preheating system and a multi-stage cyclone negative pressure cooling system, and reducing weak-magnetic alpha, beta and sigma type ferric oxide in roasting materials into one or a mixture of ferroferric oxide or gamma type ferric oxide; wherein the temperature of the suspended state is 550-900 ℃, the roasting time is 1-60 seconds, the concentration of carbon monoxide in the reducing atmosphere is 1-15%, and the oxygen content is less than 5%; wherein the sulfuric acid cinder is from waste residue generated in the process of roasting pyrite to prepare sulfuric acid.
2. The method for preparing the heavy medium powder for the high-performance coal dressing with different specifications in the step manner by using the sulfuric acid cinder, which is disclosed by claim 1, wherein the preparation of the heavy medium powder for the high-performance coal dressing adopts the magnetic field intensity of 300 Oe-500 Oe to carry out 1 coarse and 1 fine magnetic separation treatment on roasted ores, the magnetic concentrate is heavy medium powder ore pulp for the 1# coal dressing, and the magnetic tailings and middlings are combined to be used as second step utilization raw materials; secondly, grinding the second-step utilization raw materials, and then carrying out 1 coarse 1 fine magnetic separation treatment on the ground products by adopting the magnetic field intensity of 300 Oe-500 Oe, wherein the magnetic separation concentrate is heavy medium powder ore pulp for 2# coal dressing, and the magnetic separation tailings and middlings are combined to be used as third-step utilization raw materials, wherein the grinding fineness is controlled to be 40% -90% in content of 400 meshes; thirdly, carrying out 1 coarse and 1 fine magnetic separation treatment on the third-step utilization raw material by adopting the magnetic field intensity of 500 Oe-800 Oe, wherein the magnetic separation concentrate is heavy medium powder ore pulp for 3# coal dressing, and the magnetic separation tailings and middlings are combined to be used as a fourth-step utilization raw material; then, carrying out 1 roughing treatment on the fourth-step utilization raw material by adopting the magnetic field intensity of 800 Oe-1500 Oe, carrying out 1 concentration treatment on rough concentrate by adopting the magnetic field intensity of 600 Oe-1200 Oe, wherein the magnetic concentrate is heavy medium powder ore pulp for 4# coal dressing, and the magnetic tailings and middlings are combined to be used as raw materials for cement or building materials; finally, respectively controlling the slurry of the heavy medium powder for 1# coal dressing, 2# coal dressing, 3# coal dressing and one or more of the dispersing agents such as starch, dextrin, sodium humate, tannin and the like to act for 1-5 minutes in a stirring barrel, and concentrating, filtering and suspended state drying to obtain the heavy medium powder for 1# coal dressing, 2# coal dressing, 3# coal dressing and 4# coal dressing, wherein other control variables in the stirring process are as follows: the temperature of the ore pulp is 20-50 ℃, the pH of the ore pulp is 7-12, and the total consumption of the dispersing agent is 0.001-10 kg/ton of dense medium powder for coal dressing.
3. The method for preparing the dense medium powder for the high-performance coal dressing with different specifications in the step manner by using the sulfuric acid cinder according to claim 2, wherein the 1# to 4# are 4 dense medium powders for the high-performance coal dressing with different qualities, and the dense medium powder for the high-performance coal dressing has the true density of more than 4.5 g cm -3 The magnetic content is more than 95 percent, the composition content of-45 mu m is more than 80 percent, and the external moisture content is less than 8 percent, and the sulfur content is less than 3 percent; meanwhile, the true density is from large to small: 2# > 1# > 3# > 4#, the sulfur content of the catalyst is from large to small, 2# > 3# > 1# > 4#, and the composition content of-45 mu m is from large to small: 2# > 3# > 4# > 1#.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999022870A1 (en) * | 1997-11-05 | 1999-05-14 | Iron Dynamics, Inc. | Method for upgrading iron ore utilizing multiple magnetic separators |
| CN110508392A (en) * | 2019-09-06 | 2019-11-29 | 中钢集团马鞍山矿山研究院有限公司 | A kind of floating sorting of the magnetic-of Long raise and method of comprehensive utilization |
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| CN106000638B (en) * | 2016-05-20 | 2017-09-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore integrates mine tailing iron-extracting process |
| CN109304256B (en) * | 2018-09-11 | 2020-11-10 | 湖北大江环保科技股份有限公司 | Comprehensive utilization method of copper smelting tailings |
| CN211678207U (en) * | 2019-11-21 | 2020-10-16 | 北京中科领向环保研究院有限公司 | Steel slag recycling system |
| CN111604164B (en) * | 2020-05-29 | 2022-09-09 | 东北大学 | Method for decyanating cyanidation tailings and comprehensively recovering iron ore concentrate |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999022870A1 (en) * | 1997-11-05 | 1999-05-14 | Iron Dynamics, Inc. | Method for upgrading iron ore utilizing multiple magnetic separators |
| CN110508392A (en) * | 2019-09-06 | 2019-11-29 | 中钢集团马鞍山矿山研究院有限公司 | A kind of floating sorting of the magnetic-of Long raise and method of comprehensive utilization |
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