CN108913878A - A kind of arsenic removing method of iron ore - Google Patents

A kind of arsenic removing method of iron ore Download PDF

Info

Publication number
CN108913878A
CN108913878A CN201810890071.1A CN201810890071A CN108913878A CN 108913878 A CN108913878 A CN 108913878A CN 201810890071 A CN201810890071 A CN 201810890071A CN 108913878 A CN108913878 A CN 108913878A
Authority
CN
China
Prior art keywords
iron ore
dearsenification
oxidizing roasting
removing method
gas
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
Application number
CN201810890071.1A
Other languages
Chinese (zh)
Inventor
孙启祥
马驰
孙法虎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zaozhuang Snksan Intelligent Machinery Co Ltd
Original Assignee
Zaozhuang Snksan Intelligent Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zaozhuang Snksan Intelligent Machinery Co Ltd filed Critical Zaozhuang Snksan Intelligent Machinery Co Ltd
Priority to CN201810890071.1A priority Critical patent/CN108913878A/en
Publication of CN108913878A publication Critical patent/CN108913878A/en
Pending legal-status Critical Current

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
    • C22B1/11—Removing sulfur, phosphorus or arsenic other than by roasting
    • 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
    • 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)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

The invention discloses a kind of arsenic removing methods of iron ore, include the following steps：1）Prepare ore pulp；2）Biological dearsenification；3）Grinding；4）Oxidizing roasting, specially by step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, the carrier gas and constantly stirred mixture C during oxidizing roasting, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification iron ore after oxidizing roasting；5）Recycling circulation.The present invention effectively increases dearsenification efficiency by the mutual cooperation of biological dearsenification and gasification dearsenification to the dearsenification significant effect of the stone containing symplesite；Meanwhile the gasification dearsenification product of generation reduces by recycling and recycling processing and causes environmental pollution to environment, environmental pollution is small, is advantageously implemented the comprehensive utilization of the mineral resources containing arsenic.

Description

A kind of arsenic removing method of iron ore
Technical field
The present invention relates to ore processing technical field, the arsenic removing method of specifically a kind of iron ore.
Background technique
Iron ore is produced in steel and is looked forward to as containing iron simple substance or iron compound and the mineral aggregate of economic utilization is capable of It is highly important raw material in industry.There are many impurity in iron ore, according to it to smelting process and its to the shadow of product quality Ringing can be divided into beneficial with harmful two class again, and common and most important objectionable impurities has sulphur, phosphorus, arsenic, potassium, sodium, fluorine etc..Its In, arsenic can largely enter the pig iron when smelting as the harmful element in iron ore, generate to steel performance a series of bad It influences, such as steel heat machined surface can be caused to be cracked, reduce the impact flexibility of steel, increase the brittleness of steel, and then reduce the matter of steel Amount, influences the welding performance of steel.
Currently, existing arsenic removing method is mostly the dearsenicating technology that gasifies, although can remove in iron ore to a certain extent Arsenic, but arsenic-removing rate is low, and the gasification dearsenification product of generation is mostly extremely toxic substance, be easy to cause environmental pollution, brings serious Environmental problem.Therefore, the arsenic removing method for designing a kind of iron ore that environmental pollution is small, for reducing arsenic in smelting system Harm, realize the mineral resources containing arsenic comprehensive utilization be of great significance to.
Summary of the invention
The purpose of the present invention is to provide a kind of arsenic removing methods of iron ore, to solve mentioned above in the background art ask Topic.
To achieve the above object, the present invention provides the following technical solutions：
A kind of arsenic removing method of iron ore, which is characterized in that it includes the following steps：
1）Prepare ore pulp：It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials The 88-98% of total weight of material is accounted for for the part of 20-40 mesh, and suitable deionized water is then added and carries out mechanical stirring mixing It is even, then ultrasonic disperse processing 20-40min is carried out, obtain the ore pulp A that concentration is 6-18%；It is handled by ultrasonic disperse, is effectively mentioned The high dispersion effect of material；
2）Biological dearsenification：By step 1）Obtained in the strain mixed liquor of 0.1-0.2 times of weight is added in ore pulp A, then use concentration It is 3 for 98% sulphur acid for adjusting pH value, stands 8-16 days at 18-36 DEG C, be filtered to remove liquid, it is dry, obtain mixture B；
3）Grinding：By step 2）Obtained in the coke of 0.3-0.7 times of weight is added in mixture B, ground and mixed is uniform, obtains mixed Close material C；
4）Oxidizing roasting：By step 3）Obtained in mixture C carry out oxidizing roasting under weak oxide atmosphere, and roasted in oxidation The carrier gas constantly stirred mixture C during burning, and be passed through flowing is used to drive the gas D of generation, and gained is solid after oxidizing roasting Body is dearsenification iron ore；
5）Recycling circulation：By step 4）The gas D of middle generation gathers dust under the conditions of 450-750 DEG C of temperature, and what is obtained is heavy Object return step 1 drops）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that remaining gas Arsenic oxide arsenoxide in body is condensed into solid and gather dust.
As a further solution of the present invention：Step 1）In, the supersonic frequency of the ultrasonic disperse is 20-40kHz.
As further scheme of the invention：Step 1）In, the churned mechanically stirring rate is 500-900r/ min。
As further scheme of the invention：Step 2）In, the strain mixed liquor is cultivated in sanitary sewage Reach the acidithiobacillus ferrooxidans, Siberia Sulfobacillus and ferrous oxide hook end spirillum of logarithmic growth phase according to body Product is than being 3:1:2 ratio mixes.
As further scheme of the invention：Step 4）In, the temperature of the oxidizing roasting is 750-950 DEG C；It is described The calcining time of oxidizing roasting is 20-5Omin.
As further scheme of the invention：Step 4）In, the CO in the weak oxide atmosphere2/ CO volume ratio is 2: 1。
As further scheme of the invention：Step 5）In, the carrier gas is that vapor and air are according to volume ratio 5:1 ratio mixes；The flow velocity of the carrier gas is 0.3-0.7m/s.
Application of the arsenic removing method of the iron ore in preparation dearsenification iron ore product.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention effectively proposes the dearsenification significant effect of the stone containing symplesite by the mutual cooperation of biological dearsenification and gasification dearsenification High dearsenification efficiency；Meanwhile the gasification dearsenification product of generation reduces by recycling and recycling processing and causes environment to environment Pollution, environmental pollution is small, is advantageously implemented the comprehensive utilization of the mineral resources containing arsenic.
Specific embodiment
Technical solution of the present invention is described in more detail With reference to embodiment.
Embodiment 1
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 20min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 12 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 850 DEG C；The calcining time of the oxidizing roasting is 35min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 2
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 40min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 12 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 850 DEG C；The calcining time of the oxidizing roasting is 35min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 3
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 30min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 12 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 850 DEG C；The calcining time of the oxidizing roasting is 35min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 4
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 30min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 8 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 850 DEG C；The calcining time of the oxidizing roasting is 35min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 5
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 30min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 16 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 850 DEG C；The calcining time of the oxidizing roasting is 35min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 6
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 30min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 12 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 750 DEG C；The calcining time of the oxidizing roasting is 20min；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
Embodiment 7
A kind of arsenic removing method of iron ore, it includes the following steps：
1）It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials is the portion of 30 mesh Divide and account for the 93% of total weight of material, it is mixed with the stirring rate progress mechanical stirring of 700r/min that suitable deionized water is then added It closes uniformly, then ultrasonic disperse is carried out with the supersonic frequency of 30kHz and handles 30min, obtain the ore pulp A that concentration is 12%；Pass through ultrasound Decentralized processing effectively increases the dispersion effect of material；
2）By step 1）Obtained in be added the strain mixed liquor of 0.15 times of weight in ore pulp A, then with concentration for 98% sulfuric acid tune Saving pH value is 3, stands 12 days at 27 DEG C, is filtered to remove liquid, dry, obtains mixture B；
Wherein, the strain mixed liquor is the ferrous oxide acidophilus sulphur bar for reaching logarithmic growth phase cultivated in sanitary sewage Bacterium, Siberia Sulfobacillus and ferrous oxide hook end spirillum are 3 according to volume ratio:1:2 ratio mixes.
3）By step 2）Obtained in the coke of 0.5 times of weight is added in mixture B, ground and mixed is uniform, obtains mixture C；
4）By step 3）Obtained in mixture C oxidizing roasting is carried out under weak oxide atmosphere, and during oxidizing roasting The carrier gas constantly stirred mixture C, and be passed through flowing is used to drive the gas D of generation, and obtained solid is dearsenification after oxidizing roasting Iron ore；
Wherein, the temperature of the oxidizing roasting is 950 DEG C；The calcining time of the oxidizing roasting is 5Omin；The weak oxide gas CO in atmosphere2/ CO volume ratio is 2:1.
5）By step 4）The gas D of middle generation gathers dust under the conditions of 600 DEG C of temperature, and obtained sediment returns to step Rapid 1）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that the oxidation in residual gas Arsenic is condensed into solid and gather dust；Wherein, it according to volume ratio is 5 that the carrier gas, which is vapor and air,:1 Ratio mixes；The flow velocity of the carrier gas is 0.5m/s.
The present invention has the dearsenification significant effect of the stone containing symplesite by the mutual cooperation of biological dearsenification and gasification dearsenification Effect improves dearsenification efficiency；Meanwhile the gasification dearsenification product of generation is reduced and is caused to environment by recycling and recycling processing Environmental pollution, environmental pollution is small, is advantageously implemented the comprehensive utilization of the mineral resources containing arsenic.
Better embodiment of the invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party Formula within the knowledge of one of ordinary skill in the art can also be without departing from the purpose of the present invention Various changes can be made.

Claims (10)

1. a kind of arsenic removing method of iron ore, which is characterized in that it includes the following steps：
1）Prepare ore pulp：It symplesite stone will be contained will put into ball mill and carry out grinding, grinding granularity into obtained ore materials The 88-98% of total weight of material is accounted for for the part of 20-40 mesh, and suitable deionized water is then added and carries out mechanical stirring mixing It is even, then ultrasonic disperse processing 20-40min is carried out, obtain the ore pulp A that concentration is 6-18%；
2）Biological dearsenification：By step 1）Obtained in the strain mixed liquor of 0.1-0.2 times of weight is added in ore pulp A, then use concentration It is 3 for 98% sulphur acid for adjusting pH value, stands 8-16 days at 18-36 DEG C, be filtered to remove liquid, it is dry, obtain mixture B；
3）Grinding：By step 2）Obtained in the coke of 0.3-0.7 times of weight is added in mixture B, ground and mixed is uniform, obtains mixed Close material C；
4）Oxidizing roasting：By step 3）Obtained in mixture C carry out oxidizing roasting under weak oxide atmosphere, and roasted in oxidation The carrier gas constantly stirred mixture C during burning, and be passed through flowing is used to drive the gas D of generation, and gained is solid after oxidizing roasting Body is dearsenification iron ore；
5）Recycling circulation：By step 4）The gas D of middle generation gathers dust under the conditions of 450-750 DEG C of temperature, and what is obtained is heavy Object return step 1 drops）It is middle to be used as stone containing symplesite, residual gas is finally subjected to waste heat recovery processing, so that remaining gas Arsenic oxide arsenoxide in body is condensed into solid and gather dust.
2. the arsenic removing method of iron ore according to claim 1, which is characterized in that step 1）In, the ultrasonic disperse Supersonic frequency is 20-40kHz.
3. the arsenic removing method of iron ore according to claim 2, which is characterized in that step 1）In, it is described churned mechanically Stirring rate is 500-900r/min.
4. the arsenic removing method of iron ore according to claim 1, which is characterized in that step 2）In, the strain mixed liquor For the acidithiobacillus ferrooxidans for reaching logarithmic growth phase, Siberia Sulfobacillus and oxidation cultivated in sanitary sewage Ferrous hook end spirillum is 3 according to volume ratio:1:2 ratio mixes.
5. the arsenic removing method of iron ore according to claim 1, which is characterized in that step 4）In, the oxidizing roasting Temperature is 750-950 DEG C.
6. the arsenic removing method of iron ore according to claim 5, which is characterized in that step 4）In, the oxidizing roasting Calcining time is 20-5Omin.
7. the arsenic removing method of iron ore according to claim 6, which is characterized in that step 4）In, the weak oxide atmosphere In CO2/ CO volume ratio is 2:1.
8. the arsenic removing method of iron ore according to claim 1, which is characterized in that step 5）In, the carrier gas is water steaming Gas and air are 5 according to volume ratio:1 ratio mixes.
9. the arsenic removing method of iron ore according to claim 8, which is characterized in that step 5）In, the flow velocity of the carrier gas For 0.3-0.7m/s.
10. a kind of arsenic removing method of the iron ore as described in claim 1-9 is any answering in preparation dearsenification iron ore product With.
CN201810890071.1A 2018-08-07 2018-08-07 A kind of arsenic removing method of iron ore Pending CN108913878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810890071.1A CN108913878A (en) 2018-08-07 2018-08-07 A kind of arsenic removing method of iron ore

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810890071.1A CN108913878A (en) 2018-08-07 2018-08-07 A kind of arsenic removing method of iron ore

Publications (1)

Publication Number Publication Date
CN108913878A true CN108913878A (en) 2018-11-30

Family

ID=64393677

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810890071.1A Pending CN108913878A (en) 2018-08-07 2018-08-07 A kind of arsenic removing method of iron ore

Country Status (1)

Country Link
CN (1) CN108913878A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113293299A (en) * 2021-05-07 2021-08-24 云南省生态环境科学研究院 Resource utilization method for arsenic-containing hazardous waste
CN115011804A (en) * 2021-12-23 2022-09-06 昆明理工大学 Method for removing arsenic by co-roasting high-arsenic antimony-lead anode mud air and water vapor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251099A (en) * 2011-07-14 2011-11-23 北京科技大学 Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus
CN103820587A (en) * 2013-12-11 2014-05-28 昆明理工大学 Method for removing arsenic from arsenic-containing iron-rich slag by volatilization

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102251099A (en) * 2011-07-14 2011-11-23 北京科技大学 Method for removing arsenic, sulfur and phosphorus by using thiobacillusacidophilus
CN103820587A (en) * 2013-12-11 2014-05-28 昆明理工大学 Method for removing arsenic from arsenic-containing iron-rich slag by volatilization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113293299A (en) * 2021-05-07 2021-08-24 云南省生态环境科学研究院 Resource utilization method for arsenic-containing hazardous waste
CN115011804A (en) * 2021-12-23 2022-09-06 昆明理工大学 Method for removing arsenic by co-roasting high-arsenic antimony-lead anode mud air and water vapor

Similar Documents

Publication Publication Date Title
CN107555428A (en) A kind of micro crystal graphite secondary pickling method of purification and its high-purity micro crystal graphite
CN112453009B (en) Method for green harmless resource utilization of aluminum ash
CN113248095B (en) Ferric salt sludge treatment process and treatment system
CN108913878A (en) A kind of arsenic removing method of iron ore
CN109112324A (en) It is a kind of to leach the method for efficiently strengthening V leaching rate in bone coal in activation
CN108554379B (en) Adsorbent based on waste steel slag and preparation method and application thereof
CN105329908A (en) Kaolin bleaching method
CN210528729U (en) Stainless steel acid-mixed waste liquid sludge harmless treatment system
CN108557901A (en) A kind of production technology of steel mill's spent acid production bodied ferric sulfate
CN108246090A (en) A kind of process using slag slurries wet method decarburization
CN114405962A (en) Method for efficiently removing ammonia nitrogen in electrolytic manganese slag
CN107385461A (en) A kind of chitosan magnetic fixes degradation bacteria antibacterial composite powder cleaning agent and cleaning
CN110950480A (en) Praseodymium oxide production waste liquid recovery treatment method
CN109037028A (en) A kind of silicon material washing method
CN107539982A (en) A kind of high-purity micro crystal graphite production system and its production technology
CN110042230B (en) Method for chemically strengthening metal leaching in secondary zinc oxide powder by mechanochemical coupling ultrasonic
CN104907570B (en) A kind of preparation method of powder used in metallurgy reduced iron powder
CN111632940A (en) Post-treatment rinsing method for electrolytic manganese dioxide
CN113401928B (en) Method for removing calcium from fly ash and/or coal gangue by acid washing with ultrasonic waves
CN113293068B (en) Cleaning fluid suitable for plate heat exchanger and preparation method thereof
CN108163880A (en) A kind of method that land plaster is prepared using zinc abstraction waste acid
CN115806348A (en) Preparation method of efficient phosphorus removal constructed wetland modified filler
CN109321747B (en) Method for leaching manganese concentrate from low-grade calciummanganese ore and regenerating leaching medium
CN107935332B (en) Continuous biological dealkalization process for red mud
CN107758877B (en) Industrial sewage treating agent and preparation method thereof

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

Application publication date: 20181130

RJ01 Rejection of invention patent application after publication