CN104611497A - Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln - Google Patents
Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln Download PDFInfo
- Publication number
- CN104611497A CN104611497A CN201510025049.7A CN201510025049A CN104611497A CN 104611497 A CN104611497 A CN 104611497A CN 201510025049 A CN201510025049 A CN 201510025049A CN 104611497 A CN104611497 A CN 104611497A
- Authority
- CN
- China
- Prior art keywords
- nickel ore
- red soil
- nickel
- soil nickel
- ferronickel
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for directly reducing nickel-bearing pig iron from laterite-nickel ore in a thermal-storage nickel-iron tunnel kiln. The method is applicable to nickel-iron reduction, adopts a crusher, a dryer, a fine crusher, a screening machine, a double-shaft mixer and the thermal-storage nickel-iron tunnel kiln, and is characterized by comprising steps as follows: after the water content of the laterite-nickel ore is reduced, laterite-nickel ore particles are crushed, laterite-nickel ore particles with diameter smaller than 3 mm are separated, the laterite-nickel ore particles are uniformly mixed with a carbonaceous reducing agent and a reducing fusing agent; hollow bricks are prepared from the laterite-nickel ore particles, are sequentially transferred to the thermal-storage nickel-iron tunnel kiln and are subjected to calcining, discharging and water quenching to obtain the nickel-bearing pig iron. The method has simple process and low energy consumption, and is applicable to large-scale production.
Description
Technical field
The present invention relates to a kind of reduction nickel-contained pig iron method, be particularly useful for one and utilize red soil nickel ore in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel.
Background technology
Existing red soil nickel ore fire reduction method is divided into electrosmelting, blast-furnace smelting and Metal In Shaft Furnace, wherein traditional electrosmelting relies on rotary kiln and gas blower, its power consumption is large, and it is fastidious to the quality of red soil nickel ore, the temperature that tradition blast-furnace smelting needs is high, usually at 1600 ° of more than C, the fuel consumed is high, Classical Shaft Furnace method production efficiency is low, and it is seriously polluted, usually reduction effect is affected by reduction zone temperature, recovery time is long, need CO gas successively to the red soil nickel ore infiltration be reduced, cause the recovery time long, production efficiency is low, reduce not thorough, uneven, the result easily reoxidized, for ensureing the ventilation property of shaft furnace, the pelletizing after sintering is adopted to enter stove, the flue dust that easy generation is a large amount of, and add the time of calcining.
Summary of the invention
The object of the invention is the weak point overcome in prior art, propose a kind of technique simple, be applicable to maximize and produce, the red soil nickel ore of less energy consumption is in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel
For realizing above-mentioned technical purpose, red soil nickel ore of the present invention, in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, adopts crusher, dryer, thin broken machine, sieve apparatus, biaxial rneader and accumulation of heat ferronickel tunnel furnace, it is characterized in that comprising the steps:
A. utilize rotary drum dryer to reduce red soil nickel ore water content, the water content controlling red soil nickel ore is interval at 13-17%;
B. use thin broken machine that water content is carried out fragmentation at the red soil nickel ore particle in 13-17% interval, by sieve apparatus, diameter after fragmentation is less than the red soil nickel ore particle separation of 3mm out, the continuation that diameter is greater than 3mm uses thin broken crusher machine;
C. the red soil nickel ore particle isolated diameter being less than 3mm drops into biaxial rneader mix with carbonaceous reducing agent, the flux that reduces;
D. utilize double-click vacuum extruder that the red soil nickel ore particle being mixed with carbonaceous reducing agent and reduction flux is made hollow brick;
E. the hollow brick made is sent into the calcining of accumulation of heat ferronickel tunnel furnace successively by conveying crawler belt, calcining temperature controls at 1300-1400 DEG C, and the time of reduction calcining is 1-2 hour;
F. the nickel-contained pig iron after reduction calcining is discharged together with slag in accumulation of heat ferronickel tunnel furnace, and through shrend cooling, broken, autogenous grinding, just can obtain nickel-contained pig iron;
Described carbonaceous reducing agent be ash content lower than 12% coal dust or coke powder, the weight of carbonaceous reducing agent is the 15-25% of red soil nickel ore weight, described reduction flux is that diameter is less than the granular calcium carbonate of 3mm, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan), the ratio of calcium carbonate, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan) is 7:1:2, accounts for the 8-15% of red soil nickel ore weight.
Described water-quenched slag is 55-60 DEG C; Described hollow brick has 13 through holes, is of a size of 240*200*100mm, improves burning and reduction contact area, is heated evenly, improves the reduction reaction of iron nickel metal; Can use as calcic lime is as siccative during the described water content at control red soil nickel ore, siccative and red soil nickel ore are uniformly mixed, thus reduce the water content of red soil nickel ore; The nickel content of described red soil nickel ore is 0 ~ 1.7%, and iron level is 18 ~ 19%.
Beneficial effect: present method technological process of production shortens, operate fairly simple, eliminate the retort that reduction red soil nickel ore is used, red soil nickel ore is pressed into hollow brick and is convenient to transport and storage, also improve thermal conduction and the ventilation property of red soil nickel ore, change the CO gas produced in conventional tunnel kiln retort, slowly permeate the method for red soil nickel ore, shorten the time of reduction calcining, improve working efficiency.
The reduction nickel-contained pig iron of last output is high through melting carbon content, and reoxidizing property is not strong, and use the cooling of water essence method, do not need the protection using large-scale cooling cowl, reductive agent cost used is low, effective, and energy-saving effect is remarkable, ferro-nickel recovery rate is high.
Embodiment
Below in conjunction with an embodiment, the present invention will be further described:
Red soil nickel ore of the present invention, in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, adopts crusher, dryer, thin broken machine, sieve apparatus, biaxial rneader and accumulation of heat ferronickel tunnel furnace, comprises the steps:
A. red soil nickel ore is selected, the nickel content of described red soil nickel ore is 0 ~ 1.7%, and iron level is 18 ~ 19%, utilizes rotary drum dryer or calcic lime to be uniformly mixed as siccative and red soil nickel ore, reduce red soil nickel ore water content, the water content controlling red soil nickel ore is interval 13 ~ 17%;
B. use thin broken machine that water content is carried out fragmentation at the red soil nickel ore particle in 13-17% interval, by sieve apparatus diameter after fragmentation is less than 3mm/ fineness be 150-200 object red soil nickel ore particle separation out, the continuation that diameter is greater than 3mm uses thin broken crusher machine;
C. the red soil nickel ore particle diameter that sub-argument goes out being less than 3mm drops into biaxial rneader mix with carbonaceous reducing agent, the flux that reduces;
D. double-click vacuum extruder and the red soil nickel ore particle being mixed with carbonaceous reducing agent and reduction flux is made hollow brick, described hollow brick has 13 through holes, is of a size of 240*200*100mm; Improve burning and reduction contact area, be heated evenly, improve the reduction reaction of iron nickel metal;
E. the hollow brick made is proceeded to the calcining of accumulation of heat ferronickel tunnel furnace successively by conveying crawler belt, calcining temperature controls at 1300-1400 DEG C, and the time of reduction calcining is 1-2 hour;
F. the nickel-contained pig iron after reduction calcining is discharged together with slag in accumulation of heat ferronickel tunnel furnace, and be DEG C shrend cooling of 55-60 through excess temperature, broken, autogenous grinding, just can obtain nickel-contained pig iron;
Described carbonaceous reducing agent be ash content lower than 12% coal dust or coke powder, the weight of carbonaceous reducing agent is the 15-25% of red soil nickel ore weight, described reduction flux is that diameter is less than the granular calcium carbonate of 3mm, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan), the ratio of calcium carbonate, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan) is 7:1:2, accounts for the 8-15% of red soil nickel ore weight.
Claims (5)
1. red soil nickel ore is in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, adopts crusher, dryer, thin broken machine, sieve apparatus, biaxial rneader and accumulation of heat ferronickel continuous tunnel furnace, it is characterized in that comprising the steps:
A. utilize rotary drum dryer to reduce red soil nickel ore water content, the water content controlling red soil nickel ore is interval at 13-17%;
B. use thin broken machine that water content is carried out fragmentation at the red soil nickel ore particle in 13-17% interval, by sieve apparatus, diameter after fragmentation is less than the red soil nickel ore particle separation of 3mm out, the continuation that diameter is greater than 3mm uses thin broken crusher machine;
C. the red soil nickel ore particle isolated diameter being less than 3mm drops into biaxial rneader mix with carbonaceous reducing agent, the flux that reduces;
D. utilize double-click vacuum extruder that the red soil nickel ore particle being mixed with carbonaceous reducing agent and reduction flux is made hollow brick;
E. the hollow brick made is sent into the calcining of accumulation of heat ferronickel tunnel furnace successively by conveying crawler belt, calcining temperature controls at 1300-1400 DEG C, and the time of reduction calcining is 1-2 hour;
F. the nickel-contained pig iron after reduction calcining is discharged together with slag in accumulation of heat ferronickel continuous tunnel furnace, and through shrend cooling, broken, autogenous grinding, just can obtain nickel-contained pig iron;
Described carbonaceous reducing agent be ash content lower than 12% coal dust or coke powder, the weight of carbonaceous reducing agent is the 15-25% of red soil nickel ore weight, described reduction flux is that diameter is less than the granular calcium carbonate of 3mm, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan), the ratio of calcium carbonate, Sodium sulfate anhydrous.min(99) and Calcium Fluoride (Fluorspan) is 7:1:2, accounts for the 8-15% of red soil nickel ore weight.
2. according to red soil nickel ore described in claim 1 in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, it is characterized in that: described water-quenched slag is 55-60 DEG C.
3. according to red soil nickel ore described in claim 1 in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, it is characterized in that: described hollow brick has 13 through holes, is of a size of 240*200*100mm, improve burning and reduction contact area, be heated evenly, improve the reduction reaction of iron nickel metal.
4. according to red soil nickel ore described in claim 1 in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, it is characterized in that: can use as calcic lime is as siccative during the described water content at control red soil nickel ore, siccative and red soil nickel ore are uniformly mixed, thus reduce the water content of red soil nickel ore.
5. according to red soil nickel ore described in claim 1 in the tunnel kiln direct reduced nickel-contained pig iron method of accumulation of heat ferronickel, it is characterized in that: the nickel content of described red soil nickel ore is 0 ~ 1.7%, and iron level is 18 ~ 19%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025049.7A CN104611497A (en) | 2015-01-19 | 2015-01-19 | Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025049.7A CN104611497A (en) | 2015-01-19 | 2015-01-19 | Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104611497A true CN104611497A (en) | 2015-05-13 |
Family
ID=53146144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510025049.7A Pending CN104611497A (en) | 2015-01-19 | 2015-01-19 | Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104611497A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148729A (en) * | 2016-08-31 | 2016-11-23 | 广西盛隆冶金有限公司 | Selective reduction processes the method for lateritic nickel ore |
| CN112934907A (en) * | 2021-01-14 | 2021-06-11 | 华南理工大学 | Method for efficiently removing iron from shield mud |
| CN112939572A (en) * | 2019-12-11 | 2021-06-11 | 桂阳县皓钰新材料有限公司 | Process for treating iron slag of steel plant by tunnel kiln |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318787A (en) * | 2007-06-04 | 2008-12-10 | 王文举 | Process and method for converting waste slag wholly of aluminum industry into ecological building material |
| CN101538628A (en) * | 2009-05-06 | 2009-09-23 | 毛黎生 | Method for directly reducing laterite-nickel into nickel-bearing ball iron in tunnel kilns |
| CN101638703A (en) * | 2009-08-27 | 2010-02-03 | 毛黎生 | Method for directly reducing nickel containing pig iron by lateritic nickel in tunnel kiln |
| CN201605286U (en) * | 2010-02-05 | 2010-10-13 | 毛耐文 | Nickel oxide ore brick |
| CN102234717A (en) * | 2011-03-29 | 2011-11-09 | 中国恩菲工程技术有限公司 | Method for roasting red mud nickel ore |
| CN102925612A (en) * | 2012-10-31 | 2013-02-13 | 长沙矿冶研究院有限责任公司 | Method for extracting sponge iron from sulfate slag by reducing roasting of tunnel kiln |
| CN103332947A (en) * | 2013-07-12 | 2013-10-02 | 三亚闽槐建材有限公司 | Perforated environment-friendly sintered brick and preparation method thereof |
-
2015
- 2015-01-19 CN CN201510025049.7A patent/CN104611497A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318787A (en) * | 2007-06-04 | 2008-12-10 | 王文举 | Process and method for converting waste slag wholly of aluminum industry into ecological building material |
| CN101538628A (en) * | 2009-05-06 | 2009-09-23 | 毛黎生 | Method for directly reducing laterite-nickel into nickel-bearing ball iron in tunnel kilns |
| CN101638703A (en) * | 2009-08-27 | 2010-02-03 | 毛黎生 | Method for directly reducing nickel containing pig iron by lateritic nickel in tunnel kiln |
| CN201605286U (en) * | 2010-02-05 | 2010-10-13 | 毛耐文 | Nickel oxide ore brick |
| CN102234717A (en) * | 2011-03-29 | 2011-11-09 | 中国恩菲工程技术有限公司 | Method for roasting red mud nickel ore |
| CN102925612A (en) * | 2012-10-31 | 2013-02-13 | 长沙矿冶研究院有限责任公司 | Method for extracting sponge iron from sulfate slag by reducing roasting of tunnel kiln |
| CN103332947A (en) * | 2013-07-12 | 2013-10-02 | 三亚闽槐建材有限公司 | Perforated environment-friendly sintered brick and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148729A (en) * | 2016-08-31 | 2016-11-23 | 广西盛隆冶金有限公司 | Selective reduction processes the method for lateritic nickel ore |
| CN112939572A (en) * | 2019-12-11 | 2021-06-11 | 桂阳县皓钰新材料有限公司 | Process for treating iron slag of steel plant by tunnel kiln |
| CN112934907A (en) * | 2021-01-14 | 2021-06-11 | 华南理工大学 | Method for efficiently removing iron from shield mud |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103708455B (en) | The method preparing carbide | |
| CN103667742B (en) | Treatment method of laterite-nickel ore | |
| CN104404189B (en) | Utilize the method that chromite powder two-step method melting and reducing produces ferrochrome | |
| WO2021115029A1 (en) | Iron-containing metallurgical slag granule graded waste heat recovery and direct reduction system and method | |
| CN101538632B (en) | Preparation process and device of sponge iron | |
| CN106367600A (en) | Method for treating high-zinc iron-containing slime through utilizing rotary kiln | |
| CN103667675A (en) | Treatment method of laterite-nickel ore | |
| CN103667743A (en) | Treatment method of laterite-nickel ore | |
| CN101575654B (en) | Process and device for preparing iron alloy containing nickel and nickel-chromium | |
| CN103451346B (en) | Copper smelting slag reduction method | |
| CN105036132B (en) | The method for preparing calcium carbide | |
| CN103451451A (en) | Ferro-nickel alloy production technology with laterite nickel ore processed through oxygen enrichment hot air shaft furnace | |
| CN102409124A (en) | Continued ironmaking device based on melting reduction | |
| CN102634622A (en) | Method for reducing and separating metallic irons by using refractory ores, complex ores and iron-containing wastes | |
| CN105112663A (en) | Combined production process for high-carbon ferro-chrome and semi-coke | |
| CN104164556A (en) | Chain grate-tandem rotary kiln whole-particle fraction magnetic roasting process for refractory low-grade iron ore | |
| CN103290161B (en) | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste | |
| CN104928428A (en) | Pulverized coal melt separation and recovery method for low-grade iron resources | |
| CN103146913A (en) | Method for treating iron-containing dust of iron and steel plant by using cupola furnace | |
| CN104611497A (en) | Method for directly reducing nickel-bearing pig iron from laterite-nickel ore in thermal-storage nickel-iron tunnel kiln | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN101538628A (en) | Method for directly reducing laterite-nickel into nickel-bearing ball iron in tunnel kilns | |
| CN102409126B (en) | Integrated reduction ironmaking furnace and integrated reduction ironmaking process | |
| CN101638703B (en) | Method for directly reducing nickel containing pig iron by lateritic nickel in tunnel kiln | |
| CN103205584A (en) | Production device and production method of manganese monoxide mineral powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20150513 |