CN104942301A - Technology for producing nickel raw material for stainless steel by nickelous hydroxide - Google Patents
Technology for producing nickel raw material for stainless steel by nickelous hydroxide Download PDFInfo
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- CN104942301A CN104942301A CN201510345428.4A CN201510345428A CN104942301A CN 104942301 A CN104942301 A CN 104942301A CN 201510345428 A CN201510345428 A CN 201510345428A CN 104942301 A CN104942301 A CN 104942301A
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Abstract
The invention belongs to the metallurgical field, and particularly relates to a technology for producing a nickel raw material for stainless steel by nickelous hydroxide. The technical problems that in an existing technology for producing the nickel raw material for the stainless steel, the technology is complex, the energy consumption is high, and the cost is high are solved. In order to solve the problems, according to the technical scheme, the technology for producing the nickel raw material for the stainless steel by the nickelous hydroxide is provided. The technology comprises the following steps that dried nickelous hydroxide is evenly distributed on a steel belt of a steel belt furnace; N<2> is pumped in, heating and temperature increasing are carried out, and when the temperature increasing is carried out, the N<2> is continuously pumped in at the same time; when the temperature is increased to reach up to 200 DEG C, a mixed gas of H<2> and the N<2> is pumped into the steel belt furnace; when the temperature is increased to reach up to 500 DEG C, the constant temperature and restoring are maintained; after the constant temperature and the restoring are completed, nickel powder is obtained; after fusion is carried out on the nickel powder by an intermediate frequency furnace, the nickel power is directly used for stainless steel smelting. According to the technology for producing the nickel raw material for the stainless steel by the nickelous hydroxide, the operating procedure is simple, the energy consumption is low, the supplying ways for the nickel raw material for producing the stainless steel is widened, and the production cost of the stainless steel is lowered.
Description
Technical field
The invention belongs to field of metallurgy, be specifically related to the technique that nickel hydroxide produces stainless steel nickel raw material.
Background technology
Nickel is the important alloying element producing austenitic stainless steel, the consumption of nickel in stainless steel industry accounts for 80% of total quantity consumed, along with the increase of China's stainless steel output, also increase year by year the demand of nickel, current smelting stainless steel nickel bearing raw material used mainly contains sheet nickel and dilval.
The ferronickel of domestic production accounts for about 65% of nickel supply, China ferronickel produce mainly with import Indonesia or Filipine lateritic nickel ore for raw material, adopt electric furnace or blast furnace technology to produce.No matter be blast furnace or eaf process, can there is the problem that energy consumption is higher, especially along with Indonesia prohibits the enforcement of ore deposit order, the raw material structure of smelting ferronickel is more complicated, and cause production cost high, economic benefit is low.
Current stainless steel industry production capacity surplus, dog-eat-dog, profit margin is low, and raw material and the raw material Treatment technique for processing of seeking low cost are the inevitable choices that enterprise enhances the competitiveness.
In sum, a kind of new technology of producing stainless steel nickel raw material of exploitation is needed badly.
Summary of the invention
Technical problem to be solved by this invention is that the technique of existing production stainless steel nickel raw material is more numerous and diverse, and the high and low one-tenth of energy consumption is high.
The scheme that the present invention solves the problems of the technologies described above is to provide the technique that a kind of nickel hydroxide produces stainless steel nickel raw material, comprises the following steps:
1) be distributed into through dried nickel hydroxide uniformly on the steel band of steel belt furnace;
2) N is passed into
2air in emptying steel belt furnace, then starts heat temperature raising, continues to pass into N while intensification
2;
3), when being warming up to 200 DEG C, start to pass into H in steel belt furnace
2with N
2mist, and continue heat up;
4), when being warming up to 500 DEG C, the interior constant temperature that maintains of steel belt furnace having passed into mist reduces, and the constant temperature recovery time is 90 ~ 120min;
5) constant temperature reduction obtains nickel powder after terminating; Nickel powder, after intermediate frequency furnace fusing, is directly used in stainless steel smelting.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 1) in described nickel hydroxide, the mass percentage of Ni is 30 ~ 50%.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 1) the content < 10%wt of nickel hydroxide surface water after described drying.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 3) and 4) described in mist in, H
2volumn concentration be 15 ~ 30%.
Nickel hydroxide provided by the invention produces the technique of stainless steel nickel raw material, and operating process is simple, and energy consumption is low, has expanded the supply channel producing stainless steel nickel raw material, has reduced stainless production cost.
Detailed description of the invention
Nickel hydroxide produces the stainless steel technique of nickel raw material, comprises the following steps:
1) be distributed into through dried nickel hydroxide uniformly on the steel band of steel belt furnace;
2) N is passed into
2air in emptying steel belt furnace, then starts heat temperature raising, continues to pass into N while intensification
2;
3), when being warming up to 200 DEG C, start to pass into H in steel belt furnace
2with N
2mist, and continue heat up;
4), when being warming up to 500 DEG C, the interior constant temperature that maintains of steel belt furnace having passed into mist reduces, and the constant temperature recovery time is 90 ~ 120min;
5) constant temperature reduction obtains nickel powder after terminating; Nickel powder, after intermediate frequency furnace fusing, is directly used in stainless steel smelting.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 1) in described nickel hydroxide, the mass percentage of Ni is 30 ~ 50%.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 1) the content < 10%wt of nickel hydroxide surface water after described drying.
Above-mentioned nickel hydroxide is produced in the technique of stainless steel nickel raw material, step 3) and 4) described in mist in, H
2volumn concentration be 15 ~ 30%.
Wherein, due to H
2oxygen easily and in air is blasted, in order to keep the safety in production so the ceiling restriction of mist is 30%; In mist, the ratio of hydrogen has impact to the reduction degree of nickel hydroxide, recovery time and hydrogen utilization ratio, considers and selects lower limit to be 15%.
H
2reduction nickel hydroxide can carry out under temperature lower again, but during low temperature, reduction efficiency is low, and hydrogen utilization ratio is also low simultaneously.Through explorative experiment, the abundant reduction of nickel hydroxide when temperature is 500 DEG C, can be ensured, but continuation raised temperature can increase energy consumption.Therefore, H
2the ceiling temperature of reduction nickel hydroxide is 500 DEG C.
Determining H in mist
2volume ratio and reduction temperature after, as long as ensure nickel hydroxide can fully be reduced.And the constant temperature recovery time is also relevant with the thickness of feed layer of steel band nickel hydroxide, thickness of feed layer cannot accomplish that absolute uniform unanimously, experimentally result, obtains the constant temperature recovery time to control to be advisable at 90 ~ 120min.
The nickel hydroxide that the present invention adopts is the intermediate products of hydrometallurgy, less direct use in pyrometallurgical smelting.
Embodiment 1
1) nickel hydroxide is dried to surface water content < 10%wt, then dried nickel hydroxide is distributed on the steel band of steel belt furnace uniformly.
2) N is passed into
2air in emptying steel belt furnace, then starts heat temperature raising, continues to pass into N while intensification
2.
3), when being warming up to 200 DEG C, start to pass into H in steel belt furnace
2with N
2mist, and continue heat up; H
2volumn concentration be 20%.
4), when being warming up to 500 DEG C, the interior constant temperature that maintains of steel belt furnace having passed into mist reduces, and the constant temperature recovery time is 100min.
5) constant temperature reduction obtains nickel powder after terminating; Nickel powder, after intermediate frequency furnace fusing, is directly used in stainless steel smelting.
The composition of the present embodiment nickel hydroxide used is as shown in table 1.
The chemical composition (%wt) of table 1 nickel hydroxide
Note: the chemical composition content analysis in table 1 except surface water is all carry out after raw material stoving, and this is general in metallurgy industry, and after removing surface water, the part less than 100% is exactly the crystallization water and hydroxyl.
The nickel powder that the present embodiment obtains, its composition is as shown in table 2.
The chemical composition (%wt) of table 2 nickel powder
| Composition | Ni | Co | Fe | SiO 2 | CaO | MgO | Al 2O 3 | C | S | Impurity |
| Content | 81.05 | 2.42 | 0.29 | 2.10 | 0.21 | 3.64 | 0.04 | 0.87 | 4.802 | 4.578 |
Nickel hydroxide provided by the invention produces the technique of stainless steel nickel raw material, and its technique is simple, and energy consumption is low, cost is low, has expanded the supply channel producing stainless steel nickel raw material, has reduced stainless production cost.
Claims (5)
1. nickel hydroxide produces the stainless steel technique of nickel raw material, comprises the following steps:
1) be distributed into through dried nickel hydroxide uniformly on the steel band of steel belt furnace;
2) N is passed into
2air in emptying steel belt furnace, then starts heat temperature raising, continues to pass into N while intensification
2;
3), when being warming up to 200 DEG C, start to pass into H in steel belt furnace
2with N
2mist, and continue heat up;
4), when being warming up to 500 DEG C, the interior constant temperature that maintains of steel belt furnace having passed into mist reduces, and the constant temperature recovery time is 90 ~ 120min;
5) constant temperature reduction obtains nickel powder after terminating; Nickel powder, after intermediate frequency furnace fusing, is directly used in stainless steel smelting.
2. nickel hydroxide according to claim 1 produces the technique of stainless steel nickel raw material, it is characterized in that: step 1) in described nickel hydroxide, the mass percentage of Ni is 30 ~ 50%.
3. nickel hydroxide according to claim 1 produces the technique of stainless steel nickel raw material, it is characterized in that: step 1) the content < 10%wt of nickel hydroxide surface water after described drying.
4. nickel hydroxide according to claim 1 produces the technique of stainless steel nickel raw material, it is characterized in that: step 3) described in mist in, H
2volumn concentration be 15 ~ 30%.
5. nickel hydroxide according to claim 1 produces the technique of stainless steel nickel raw material, it is characterized in that: step 4) described in mist in, H
2volumn concentration be 15 ~ 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510345428.4A CN104942301B (en) | 2015-06-19 | 2015-06-19 | The technique that nickel hydroxide produces stainless steel nickel raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510345428.4A CN104942301B (en) | 2015-06-19 | 2015-06-19 | The technique that nickel hydroxide produces stainless steel nickel raw material |
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| CN104942301B CN104942301B (en) | 2017-07-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623961A (en) * | 2016-11-28 | 2017-05-10 | 荆门市格林美新材料有限公司 | Preparation method of nickel powder with small FSSS |
| CN106670489A (en) * | 2016-11-28 | 2017-05-17 | 荆门市格林美新材料有限公司 | Preparing method for spherical high-purity nickel powder |
| CN113265509A (en) * | 2021-05-14 | 2021-08-17 | 山西太钢不锈钢股份有限公司 | Production method for smelting nickel-based stainless steel by using nickel hydroxide as raw material in electric furnace |
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| JPS59198703A (en) * | 1983-04-25 | 1984-11-10 | Hitachi Metals Ltd | Manufacture of magnetic metal powder |
| CN1344190A (en) * | 1999-11-19 | 2002-04-10 | 堺化学工业株式会社 | Method for producing fine powder of metallic nickel comprised of fine spherical particles |
| CN101024249A (en) * | 2005-11-04 | 2007-08-29 | 住友金属矿山株式会社 | Fine nickel powder and process for producing the same |
| CN101837463A (en) * | 2009-03-20 | 2010-09-22 | 中国科学院过程工程研究所 | Method preparing superfine metallic nickel powder with high frequency plasma |
| CN102909383A (en) * | 2011-08-03 | 2013-02-06 | 深圳市格林美高新技术股份有限公司 | Method for preparing ultrafine nickel powder or cobalt powder |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59198703A (en) * | 1983-04-25 | 1984-11-10 | Hitachi Metals Ltd | Manufacture of magnetic metal powder |
| CN1344190A (en) * | 1999-11-19 | 2002-04-10 | 堺化学工业株式会社 | Method for producing fine powder of metallic nickel comprised of fine spherical particles |
| CN101024249A (en) * | 2005-11-04 | 2007-08-29 | 住友金属矿山株式会社 | Fine nickel powder and process for producing the same |
| CN101837463A (en) * | 2009-03-20 | 2010-09-22 | 中国科学院过程工程研究所 | Method preparing superfine metallic nickel powder with high frequency plasma |
| CN102909383A (en) * | 2011-08-03 | 2013-02-06 | 深圳市格林美高新技术股份有限公司 | Method for preparing ultrafine nickel powder or cobalt powder |
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| Title |
|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623961A (en) * | 2016-11-28 | 2017-05-10 | 荆门市格林美新材料有限公司 | Preparation method of nickel powder with small FSSS |
| CN106670489A (en) * | 2016-11-28 | 2017-05-17 | 荆门市格林美新材料有限公司 | Preparing method for spherical high-purity nickel powder |
| CN113265509A (en) * | 2021-05-14 | 2021-08-17 | 山西太钢不锈钢股份有限公司 | Production method for smelting nickel-based stainless steel by using nickel hydroxide as raw material in electric furnace |
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|---|---|
| CN104942301B (en) | 2017-07-04 |
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