CN108893600A - A kind of method of troilite production iron acid pellet - Google Patents
A kind of method of troilite production iron acid pellet Download PDFInfo
- Publication number
- CN108893600A CN108893600A CN201810744065.5A CN201810744065A CN108893600A CN 108893600 A CN108893600 A CN 108893600A CN 201810744065 A CN201810744065 A CN 201810744065A CN 108893600 A CN108893600 A CN 108893600A
- Authority
- CN
- China
- Prior art keywords
- troilite
- iron
- acid pellet
- roasting
- method described
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- 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
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of methods of troilite production iron acid pellet.The method includes adding binder into troilite and obtaining mixture, green pellets is made in mixture, green pellets is then carried out preheating and baking using troilite as raw material, high-temperature roasting is carried out after preheated again and generates iron acid pellet.The process that method of the invention successfully simplifies troilite production pelletizing；Existing pyrite-based sulfuric acid production technique is produced into pyrite cinder, then the after baking technique of the pyrite cinder baked for producing iron acid pellet of output is simplified to a roasting technique, enormously simplifies technique, considerably reduce project investment and cost again.
Description
Technical field
The invention belongs to the mine fields Ye Hua, and specifically, the present invention relates to a kind of troilite production iron acid pellets
Method.
Background technique
Troilite is used to always production sulfuric acid for a long time, and high-grade slag can be used for smelting iron.But pyrite
The price of slag is generally below the price of the iron ore concentrate of mining production；Meanwhile part pyrite cinder harmful element is exceeded, affects
The benefit and sale of pyrite cinder.In order to improve the value of pyrite cinder, also has and pyrite cinder is sintered production
Iron acid pellet.The technique of existing troilite production iron acid pellet uses after baking technique, that is, first passes through troilite system
Sour technique produces pyrite cinder, and the pyrite cinder of output is then passed through baked for producing iron acid pellet again again.Increase
The roasting technique added increases biggish cost, causes increased benefit lower.In addition, existing pyrite cinder baked for producing iron
Oxide pelletizing process needs a large amount of thermal energy, so that the process costs of roasting are high.It has been reported that using pyrite cinder
(i.e. iron oxide slag caused by troilite fluidized bed roasting production sulfur process) (iron concentrate containing high sulphur refers to iron with iron concentrate containing high sulphur
The content of sulfur impurity in ore is higher than 0.5% iron ore concentrate, is usually no more than 3%.Iron in iron concentrate containing high sulphur is iron oxide
That is the form presence of ferroso-ferric oxide or di-iron trioxide) mixture manufacturing pelletizing case column；But do not use troilite concentrate
(troilite concentrate does not contain iron ore concentrate or iron oxide；Iron in troilite is existed in the form of iron sulfide, the sulphur iron of high quality
Its sulfur content of mine concentrate can be higher than the case and report for 50%) directly producing iron acid pellet.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of troilite production iron acid pellet, using work provided by the invention
Troilite concentrate effectively directly can be produced iron acid pellet by skill and method.
In order to achieve the above object, the present invention provides a kind of methods of troilite production iron acid pellet, wherein the method
Including adding binder into troilite and obtaining mixture, green pellets is made in mixture, then will be given birth to using troilite as raw material
Pelletizing carries out preheating and baking, carries out high-temperature roasting after preheated again and generates iron acid pellet.
The present invention directly produces iron acid pellet using troilite concentrate, can be by a roasting technique, i.e., by troilite
Concentrate directly produces tapping acid pellet and sulfur dioxide after a high-temperature roasting.
Green pellets of the invention generates iron acid pellet and sulfur dioxide through high-temperature roasting.
Some specific embodiments according to the present invention, wherein the present invention is with produced during troilite and roasting technique
Broken pelletizing or powder mixture as raw material produce iron acid pellet；Alternatively, with the mixed of troilite and iron-containing material
Object is closed as raw material and produces iron acid pellet；The mass ratio of added pelletizing or powder or iron-containing material is no more than raw material
The 70% of gross mass.
Some specific embodiments according to the present invention, wherein the iron-containing material is iron ore concentrate.
Wherein it is understood that roasting technique described here, refer to entire including preheating and baking and high-temperature roasting
Roasting process.
The broken pelletizing or powder generated during the roasting technique, mainly generates in roasting process.
Some specific embodiments according to the present invention, wherein obtained sulfur dioxide is for producing sulfuric acid, iron acid pellet
For iron-smelting raw material.
Some specific embodiments according to the present invention, wherein by troilite quality be 100% in terms of, the binder adds
Dosage is 0.5-20%.
Some specific embodiments according to the present invention, wherein the binder is selected from bentonite, kaolin or other bondings
One of agent or a variety of combinations.
Some specific embodiments according to the present invention, wherein the temperature of preheating and baking is 300-700 DEG C, when preheating and baking
Between be 0.1-2h.
Some specific embodiments according to the present invention, wherein the present invention carries out preheating and baking using drying grate or shaft furnace.
Some specific embodiments according to the present invention, wherein the temperature of the high-temperature roasting is 1000-1300 DEG C, roasting
Time is 0.1-5h.
Some specific embodiments according to the present invention, wherein the present invention carries out high-temperature roasting using rotary kiln or shaft furnace.
Some specific embodiments according to the present invention, wherein the present invention will react the heat of release in high-temperature calcination process
Circulation is used for preheating and baking and/or high-temperature roasting.
Some specific embodiments according to the present invention, wherein the method includes the same of binder is added into troilite
When, chloride is added also into troilite to obtain mixture.
The present invention can reduce or recycle metallic element in iron acid pellet by addition chloride.
Some specific embodiments according to the present invention, wherein the chloride be selected from calcium chloride, sodium chloride, potassium chloride and
One of ammonium chloride or a variety of mixing.
Some specific embodiments according to the present invention, wherein by troilite quality be 100% in terms of, the chloride adds
Dosage is 0.5-20%.
Some specific embodiments according to the present invention, wherein the method includes mixture is carried out profit mill, kneading, system
Grain pelletizing and drying, to obtain green pellets.
Some specific embodiments according to the present invention, wherein the troilite is troilite concentrate or smashed sulphur iron
Mine (its granularity is that -200 mesh are more than 60%).
Some specific embodiments according to the present invention, wherein sulfur grade (sulfur content) is more than or equal in the troilite
40%.
Some specific embodiments according to the present invention, wherein sulfur grade is 40%-50% in the troilite.
Some specific embodiments according to the present invention, wherein sulfur grade is greater than 46% in the troilite.
Some specific embodiments according to the present invention, wherein sulfur grade is 46%-50% in the troilite.
Method of the invention directly can produce iron acid pellet, example as raw material using the higher troilite of sulfur content
As sulfur grade is greater than the troilite of 40%, even greater than 50%.And conventional method can only use troilite to roast through peroxidating at present
Slag after burning produces iron acid pellet, and without the case for using troilite directly to produce iron acid pellet；
Method of the invention can use single troilite concentrate to produce iron acid pellet for raw material, not need in raw material
Middle other ferrous materials of addition.
In conclusion the present invention provides a kind of methods of troilite production iron acid pellet.Method of the invention has
Following advantage：
(1) process that method of the invention successfully simplifies troilite production pelletizing；By existing pyrite-based sulfuric acid production technique
Pyrite cinder is produced, then again by the after baking technique of the pyrite cinder baked for producing iron acid pellet of output, letter
It is melted into a roasting technique, technique is enormously simplified, considerably reduces project investment and cost；(note：Preheating and baking is roasting
A part of technique is to prevent pelletizing from rupturing in subsequent roasting technique, while also achieving pelletizing to enhance pellet strength
Heating.Conventional pelletizing process is to reuse rotary kiln high-temperature roasting to after 800 DEG C using drying grate drying and preheating.)
(2) method of the invention uses baked for producing iron acid pellet of troilite, can make full use of troilite oxygen
Change a large amount of thermal energy caused by roasting and production cost, pole is greatly lowered so that energy consumption needed for roasting technique be greatly lowered
The economic benefit of pyrite-based sulfuric acid production technique is improved greatly；(note：Troilite is in entire roasting technique because sulphur oxidation is released largely
Heat, and entire roasting process material does not absorb heat, so, the heat that the sulphur oxidation in troilite generates, by heat energy utilization,
It can be used for entire roasting process, and waste heat more than needed can be used for generating electricity or other aspects.)
(3) method of the invention uses baked for producing iron oxide pelletizing process technology of troilite, can add as needed
Chlorination agent not only can effectively remove the harmful element in iron acid pellet simultaneously, can also recycle gold, silver, copper, lead zinc etc.
Valuable element increases substantially the environmentally friendly social benefit of project.Few with project investment, technique production cost is low, environmentally protective
The advantages that；
(4) the technology of the present invention is highly susceptible to implementing, only need to will be in existing pyrite-based sulfuric acid production technique, it is common to use sulphur iron
Mine fluidized-bed roasting process is changed into troilite pelletizing high-temperature roasting technique, and troilite can be realized and directly produce iron acid pellet.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart.
Specific embodiment
Below by way of the beneficial effect of the specific embodiment implementation process that the present invention will be described in detail and generation, it is intended to which help is read
Reader more fully understands essence and feature of the invention, does not limit the scope of the present invention.
Embodiment 1
The technology that a kind of troilite concentrate directly produces iron acid pellet is present embodiments provided, as shown in Figure 1, should
Method includes the following steps：
By the bentonite of certain troilite concentrate (sulfur-bearing 48.5%) addition 2.5%, by profit mill, kneading, pelletizing, do
Green pellets is made in troilite concentrate by the techniques such as dry；The green pellets produced carries out preheating and baking, preheating and baking using drying grate
700 DEG C of temperature, the preheating and baking time 70 minutes；After pelletizing preheating after preheating and baking, high-temperature roasting is carried out using rotary kiln,
1250 DEG C of maturing temperature, calcining time 0.5 hour.Green pellets produces tapping acid pellet and titanium dioxide through high temperature oxidation roasting
Sulphur；Iron acid pellet is as product for smelting iron, and sulfur dioxide flue gas is for producing sulfuric acid.Through detecting, pellet strength reaches
2.775 thousand Ns, sulfur-bearing 0.07%.
Embodiment 2
The technology that a kind of troilite concentrate directly produces iron acid pellet is present embodiments provided, as shown in Figure 1.It should
Method includes the following steps：
Certain troilite concentrate (sulfur-bearing 48%) is added into 2% bentonite and 4% calcium chloride, by moistening mill, kneading, system
The techniques such as grain pelletizing, drying, are made green pellets for troilite concentrate；The green pellets produced carries out preheating and baking using shaft furnace,
The temperature of preheating and baking is 550 DEG C, calcining time 45 minutes；After pelletizing preheating after preheating and baking, carried out using rotary kiln high
Temperature roasting, 1300 DEG C of maturing temperature, calcining time 0.8 hour.Green pellets produces tapping acid pellet, two through high temperature oxidation roasting
Sulfur oxide and chloride mixed flue gas；Iron acid pellet as product for smelting iron, wash by sulfur dioxide and chloride mixed flue gas
After washing, sulfur dioxide is for producing sulfuric acid, and chloride is for recycling valuable metal.Through detecting, pellet strength reaches 2.370 thousand
Ox, sulfur-bearing 0.05%, golden volatility 94.8%, silver-colored volatility 67.5%, copper volatility 90.2% in iron concentrate.
Embodiment 3
Troilite concentrate sulfur-bearing 50% is added to 2.5% bentonite, 5% calcium chloride, and mixes 15% broken ball
By techniques such as profit mill, kneading, pelletizing, dryings green-ball is made in troilite concentrate by group and powder and 15% iron ore concentrate
Group；The green pellets produced carries out preheating and baking using drying grate, and the temperature of preheating and baking is 390 DEG C, calcining time 90 minutes；
After preheating and baking pelletizing preheating after, using rotary kiln carry out high-temperature roasting, 1200 DEG C of maturing temperature, calcining time 1.0 hours.
Green pellets is through high temperature oxidation roasting production tapping acid pellet, sulfur dioxide and chloride mixed flue gas；Iron acid pellet conduct
Product is for smelting iron, and after sulfur dioxide and the washing of chloride mixed flue gas, for producing sulfuric acid, chloride is used for back sulfur dioxide
Receive valuable metal.Through detecting, pellet strength reaches 2.620 thousand Ns, sulfur-bearing 0.06%, golden volatility 95% in iron concentrate.
Claims (10)
1. a kind of method of troilite production iron acid pellet, wherein the method includes using troilite as raw material；It is preferred that with sulphur
The mixture of broken pelletizing or powder caused by during iron ore and roasting technique produces iron acid pellet as raw material；Or
Person produces iron acid pellet using the mixture of troilite and iron-containing material (preferably iron ore concentrate) as raw material；It is added broken
The mass ratio of broken pelletizing or powder or iron-containing material is no more than the 70% of total mass of raw material, and binder is added into troilite
Mixture is obtained, green pellets is made in mixture, green pellets is then subjected to preheating and baking, directly carries out high temperature again after preheated
Roasting (preferably the temperature of high-temperature roasting is 1000-1300 DEG C, calcining time 0.1-5h) generates iron acid pellet.
2. according to the method described in claim 1, being in terms of 100% by troilite quality, the additive amount of the binder is wherein
0.5-20%.
3. according to the method described in claim 1, wherein, the binder is selected from bentonite, and/or kaolin.
4. according to the method described in claim 1, wherein, 300-700 DEG C of the temperature of preroast, calcining time 0.1-2h.
5. according to the method described in claim 1, wherein, carrying out preroast using drying grate or shaft furnace.
6. according to the method described in claim 1, wherein, carrying out high-temperature roasting using rotary kiln or shaft furnace.
7. according to the method described in claim 1, wherein, the recycle heat that release is reacted in high-temperature calcination process is used for prebake
Burning and/or high-temperature roasting.
8. method described in any one according to claim 1~7, wherein the method includes adding bonding into troilite
While agent, chloride is added also into troilite and (is preferably selected from one of calcium chloride, sodium chloride, potassium chloride and ammonium chloride
Or a variety of mixing) it (is preferably in terms of 100% by troilite quality, the additive amount of the chloride is 0.5-20%) to obtain
Mixture.
9. method described in any one according to claim 1~7, wherein the method includes mixture is carried out profit mill, is mixed
It pinches, pelletizing and drying, to obtain green pellets.
10. method described in any one according to claim 1~7, wherein the troilite is troilite concentrate (preferably institute
It states sulfur grade in troilite concentrate and is greater than or equal to 40%；It is preferred that sulfur grade is 40%-50% in troilite).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744065.5A CN108893600A (en) | 2018-07-09 | 2018-07-09 | A kind of method of troilite production iron acid pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744065.5A CN108893600A (en) | 2018-07-09 | 2018-07-09 | A kind of method of troilite production iron acid pellet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108893600A true CN108893600A (en) | 2018-11-27 |
Family
ID=64348689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810744065.5A Pending CN108893600A (en) | 2018-07-09 | 2018-07-09 | A kind of method of troilite production iron acid pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108893600A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195157A (en) * | 2019-07-05 | 2019-09-03 | 福州大学 | Low Grade Copper Ore briquetting-the biological dump leaching process crushed based on high-pressure roller mill |
| CN114836616A (en) * | 2022-04-01 | 2022-08-02 | 山西太钢不锈钢股份有限公司 | Iron ore powder pellet and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768661A (en) * | 2008-12-29 | 2010-07-07 | 厦门紫金矿冶技术有限公司 | Method for comprehensive utilization of iron and sulfur in tailing containing iron and sulfur |
| CN101906535A (en) * | 2010-08-05 | 2010-12-08 | 昆明理工大学 | Recycling method of low-grade lead zinc in pyrite |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN107557569A (en) * | 2017-10-18 | 2018-01-09 | 江西理工大学 | Complexity is containing golden troilite chloridising roasting separation Method for extracting gold |
| CN108004362A (en) * | 2017-12-14 | 2018-05-08 | 江苏省冶金设计院有限公司 | Troilite prepares sulfuric acid and the method and system of direct reduced iron |
-
2018
- 2018-07-09 CN CN201810744065.5A patent/CN108893600A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768661A (en) * | 2008-12-29 | 2010-07-07 | 厦门紫金矿冶技术有限公司 | Method for comprehensive utilization of iron and sulfur in tailing containing iron and sulfur |
| CN101906535A (en) * | 2010-08-05 | 2010-12-08 | 昆明理工大学 | Recycling method of low-grade lead zinc in pyrite |
| CN102242254A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | High sulfide pyrite pellet reinforced roasting consolidation technology |
| CN107557569A (en) * | 2017-10-18 | 2018-01-09 | 江西理工大学 | Complexity is containing golden troilite chloridising roasting separation Method for extracting gold |
| CN108004362A (en) * | 2017-12-14 | 2018-05-08 | 江苏省冶金设计院有限公司 | Troilite prepares sulfuric acid and the method and system of direct reduced iron |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195157A (en) * | 2019-07-05 | 2019-09-03 | 福州大学 | Low Grade Copper Ore briquetting-the biological dump leaching process crushed based on high-pressure roller mill |
| CN114836616A (en) * | 2022-04-01 | 2022-08-02 | 山西太钢不锈钢股份有限公司 | Iron ore powder pellet and preparation method thereof |
| CN114836616B (en) * | 2022-04-01 | 2023-12-29 | 山西太钢不锈钢股份有限公司 | Iron ore powder pellet and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105018721B (en) | It is a kind of that iron, vanadium, the method for titanium are separated from vanadium titano-magnetite | |
| CN101817553B (en) | Method for treating arsenic-containing smoke dust | |
| CN105018734B (en) | Iron, vanadium, the method for manganese separated in synchronization in a kind of tailings in vanadium extraction | |
| CN103898329B (en) | A kind of extraction vanadium method of manganese vanadium slag sintering | |
| CN102605191A (en) | Method for directly producing row copper by copper concentrate | |
| CN110484720A (en) | A kind of technique that drying grate roasting-gas-based shaft kiln prereduction-electric furnace restores comprehensive utilization of V-Ti magnetite deeply | |
| CN102181627B (en) | Method for treating primary low-grade high-phosphorus manganese ore by acid blending curing | |
| CN105734308A (en) | Vanadium leaching method for high-chrome vanadium residues | |
| CN105063347B (en) | Method for producing pellets with discarded calcium magnesium bricks | |
| CN104630475A (en) | Method for producing ferrochrome | |
| CN107287451A (en) | A kind of chromaking oxidizing roasting acid-leaching vanadium-extracted method of vanadium slag | |
| CN108893600A (en) | A kind of method of troilite production iron acid pellet | |
| CN104561526A (en) | High-all-vanadium sodium modification roasting method | |
| CN104531983A (en) | Method used for preparing pellet ore from fluorine-containing mixed iron concentrate | |
| CN103332750B (en) | Manganese oxide ore selective reduction method | |
| CN101913652A (en) | Method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore | |
| CN103266230B (en) | Vanadium-containing stone coal shaft furnace oxygen-rich roasting system and method thereof | |
| CN107287452A (en) | A kind of titanizing oxidizing roasting acid-leaching vanadium-extracted method of vanadium slag | |
| CN107082428B (en) | A method of cementite is prepared using more metal sulfate slags | |
| CN205635723U (en) | System for handle metallurgical sediment | |
| CN205990444U (en) | Vanadium slag is carried out with the system of integrated treatment | |
| CN103993165A (en) | Method for producing ferrovanadium by using ammonium metavanadate granulation to substitute flaky vanadium pentoxide | |
| CN106916940B (en) | A kind of oxidation material cold pressing group direct melting method | |
| CN106544515B (en) | A kind of method of Leaching of Vanadium from Vanadium slag | |
| CN206607299U (en) | The system of extracting vanadium from stone coal |
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: 20181127 |