CN103882223B - A kind of method improving red soil nickel ore bursting temperature of pellet ores - Google Patents
A kind of method improving red soil nickel ore bursting temperature of pellet ores Download PDFInfo
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- CN103882223B CN103882223B CN201410129299.0A CN201410129299A CN103882223B CN 103882223 B CN103882223 B CN 103882223B CN 201410129299 A CN201410129299 A CN 201410129299A CN 103882223 B CN103882223 B CN 103882223B
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Abstract
The present invention discloses a kind of method improving red soil nickel ore bursting temperature of pellet ores, belongs to the manufacturing technology field of pellet.In red soil nickel ore, add nickel flash smelting slag, first fine grinding pre-treatment carried out to red soil nickel ore, nickel flash smelting slag, and then batch mixing, pelletizing, roasting, produce red soil nickel ore pellet, the burst temperature of red soil nickel ore pellet is more than 150 DEG C.When manufacturing red soil nickel ore pellet by present method, its burst temperature can bring up to more than 150 DEG C, is conducive to the roasting processing that red soil nickel ore pellet is follow-up; And containing nickel in nickel flash smelting slag, with addition of melting nickel slag in such red soil nickel ore, the nickel content of its finished ball nodulizing can not significantly reduce.
Description
Technical field
The present invention relates to a kind of method improving red soil nickel ore bursting temperature of pellet ores, belong to the manufacturing technology field of pellet.
Background technology
In recent years, along with the minimizing gradually of nickel sulfide ore resource and higher-grade red soil nickel ore resource, a large amount of nickel grade about 1% ~ 2% the exploitation of red soil nickel ore day by day by people are paid close attention to.The domestic way generally adopted is from buying grade abroad after the red soil nickel ore of about 1%-2% at present, is processed into agglomerate or pellet for blast-furnace smelting to produce ferronickel.But find in the process of producing red soil nickel ore pellet, after red soil nickel ore is levigate, compared with conventional powdered iron ore, during pelletizing, especially easily balling-up, need not can prepare green-ball with addition of binding agents such as swelling soils substantially.But find in roasting process, red soil nickel ore pelletizing especially easily bursts, the burst temperature of conventional ball body of powder of iron ore nodulizing is generally more than 250 DEG C, and in the temperature of red soil nickel ore pelletizing more than 100 DEG C during preheating and baking, pelletizing just serious cracking, therefore, during roasting red soil nickel ore pelletizing, first will preheating at a lower temperature dewater, otherwise pelletizing seriously bursts, and will have a strong impact on the intensity of pellet.The way of current employing be exactly in levigate red soil nickel ore with addition of a certain proportion of coarse fraction powdered iron ore to improve its preheating temperature, but DeGrain.And substantially not nickeliferous in conventional powdered iron ore, therefore after conventional powdered iron ore, the nickel content of red soil nickel ore pellet significantly reduces again, reduces it smelts nickel-containing molten iron value as nickel-bearing raw material.
Therefore can develop new red soil nickel ore pellet manufacture method, to improve its burst temperature, to the production of red soil nickel ore pellet, there is realistic meaning.
Summary of the invention
In order to overcome above-mentioned deficiency, the present invention aims to provide a kind of method improving red soil nickel ore bursting temperature of pellet ores, when manufacturing red soil nickel ore pellet by present method, its burst temperature can bring up to more than 150 DEG C, is conducive to the roasting processing that red soil nickel ore pellet is follow-up.
A kind of method improving red soil nickel ore bursting temperature of pellet ores provided by the invention, comprise batching, red soil nickel ore and the fine grinding of nickel flash smelting slag, batch mixing, pelletizing, roasting, adds the nickel flash smelting slag after fine grinding in red soil nickel ore, and then pelletizing, roasting, produce red soil nickel ore pellet.
Said method comprising the steps of:
(1) prepare burden:
Red soil nickel ore, nickel flash smelting slag are prepared burden in following ratio, and concrete proportioning is:
Red soil nickel ore 75 ~ 90 parts;
Nickel flash smelting slag 10 ~ 25 parts;
(2) the levigate fine grinding of red soil nickel ore:
Red soil nickel ore is levigate, and its granularity is less than the ratio of 0.074mm between 65 ~ 85%.
(3) nickel flash smelting slag fine grinding:
Nickel flash smelting sizing is thin, and its granularity is less than the ratio of 0.074mm between 45 ~ 75%, and controls the content of its molecular water and capillary water: molecular water is less than 2%, and capillary water is greater than 25%; .
(4) batch mixing, pelletizing:
Compound pelletizing in balling disc after above-mentioned preprocessing process, the particle diameter of its pellet is 12mm ~ 20mm;
(5) roasting:
Red soil nickel ore pelletizing is carried out roasting baking on equipment, obtains finished product red soil nickel ore pellet.
The component of described nickel flash smelting slag is: NiO:0.4-1%, TFe:34%-40%, SiO
2: 30-35%, CaO:2-5%, MgO:4-8%, burn out rate 0.3-0.6%.
During roasting, sinter process parameter suitably adjusts according to need of production.
The method of raising red soil nickel ore bursting temperature of pellet ores provided by the invention, red soil nickel ore powder after nickel flash smelting sizing carefully being processed and after fine grinding mixes, can make levigate after nickel flash smelting slag be distributed in the red soil nickel ore powder after fine grinding, which enhance the burst temperature of red soil nickel ore pelletizing, be conducive to follow-up roasting.
Beneficial effect of the present invention: the nickel flash smelting slag after (1) fine grinding, its wetting ability is far below conventional powdered iron ore, more lower than the red soil nickel ore powder after fine grinding, when therefore red soil nickel ore powder prepares pelletizing with addition of the nickel flash smelting slag after fine grinding, the burst temperature of red soil nickel ore pelletizing significantly can be improved.(2) contain nickel in nickel flash smelting slag, with addition of melting nickel slag in such red soil nickel ore, although the nickel content of nickel flash smelting slag is lower than red soil nickel ore, the nickel content of its finished ball nodulizing can not significantly reduce.
The present invention is specially adapted to the enterprise utilizing producing pellets from laterite-nickel ore.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
First introduce benchmark example, benchmark example is that full red soil nickel ore powder roasting manufactures pellet.
benchmark embodiment
The concrete steps that the present embodiment prepares red soil nickel ore pellet are as follows:
(1) get the raw materials ready:
Red soil nickel ore 100 parts;
In red soil nickel ore raw material, chemical composition comprises TFe=35.1%, Ni=1.42%, SiO
2=13.7%, MgO=8.6%, burn out rate is 11.4%.This red soil nickel ore powder is Indonesia's red soil nickel ore.
(2) the levigate process of red soil nickel ore:
By levigate for 100 parts of red soil nickel ores, the ratio that its granularity is less than 0.074mm is 68%.
(3) pelletizing:
By the pelletizing in balling disc of the red soil nickel ore after fine grinding, obtain water ratio be 18.6%(by weight percentage) pelletizing, median size is 12mm ~ 20mm, and measuring the burst temperature of green pellets is 85 DEG C.
(4) roasting:
Red soil nickel ore pelletizing is carried out roasting on roasting apparatus, obtains finished product red soil nickel ore pellet.
Introduce embodiments of the invention below, the red soil nickel ore powder after nickel flash smelting sizing mainly carefully processes by embodiment and after fine grinding mixes.
embodiment 1
Nickel flash smelting slag after the red soil nickel ore powder of 87 parts and 13 parts of fine grinding process is mixed pelletizing by the present embodiment.
The present embodiment manufacture method comprises the following steps:
(1) prepare burden:
Red soil nickel ore, nickel flash smelting slag are prepared burden in following ratio, and concrete proportioning is:
Red soil nickel ore 87 parts; Nickel flash smelting slag 13 parts;
Red soil nickel ore material chemical component is identical with benchmark example.
The chemical composition of nickel flash smelting slag is as follows:
NiO:0.54%, TFe:38.8%, SiO
2: 33.2%, CaO:3.7%, MgO:6.9%, scaling loss 0.4%; This nickel flash smelting slag is Gansu nickel flash smelting slag.
(2) the levigate process of red soil nickel ore:
By levigate for 87 parts of red soil nickel ores, the ratio that its granularity is less than 0.074mm is 68%.
(3) nickel flash smelting sizing carefully processes:
13 parts of nickel flash smelting sizing are thin, and the ratio that its granularity is less than 0.074mm is 48%, and its molecular water is 1.53%, and its capillary water is greater than 28.89%.
(4) mixed pelletizing:
Compound pelletizing in balling disc after above-mentioned preprocessing process, obtain water ratio be 16.4%(by weight percentage) pelletizing, median size is 12mm ~ 20mm, and measuring the burst temperature of green pellets is 165 DEG C.
(5) roasting:
Red soil nickel ore pelletizing is carried out roasting baking on equipment, obtains finished product red soil nickel ore pellet.
During roasting, sinter process parameter suitably adjusts according to need of production.
embodiment 2
Nickel flash smelting slag after the red soil nickel ore powder of 80 parts and 20 parts of fine grinding process is mixed pelletizing by the present embodiment.
The present embodiment manufacture method comprises the following steps:
(1) prepare burden:
Red soil nickel ore, nickel flash smelting slag are prepared burden in following ratio, and concrete proportioning is:
Red soil nickel ore 80 parts; Nickel flash smelting slag 20 parts;
Red soil nickel ore material chemical component is identical with benchmark example.Nickel flash smelting slag is identical with embodiment 1.
(2) the levigate process of red soil nickel ore:
By levigate for 80 parts of red soil nickel ores, the ratio that its granularity is less than 0.074mm is 68%.
(3) nickel flash smelting sizing carefully processes:
20 parts of nickel flash smelting sizing are thin, and the ratio that its granularity is less than 0.074mm is 48%, and its molecular water is 1.53%, and its capillary water is greater than 28.89%.。
(4) mixed pelletizing:
Compound pelletizing in balling disc after above-mentioned preprocessing process, obtain water ratio be 14.8%(by weight percentage) pelletizing, median size is 12mm ~ 20mm, and measuring the burst temperature of green pellets is 205 DEG C.
(5) roasting:
Red soil nickel ore pelletizing is carried out roasting baking on equipment, obtains finished product red soil nickel ore pellet.
During roasting, sinter process parameter suitably adjusts according to need of production.
embodiment 3
Nickel flash smelting slag after the red soil nickel ore powder of 87 parts and 13 parts of fine grinding process is mixed pelletizing by the present embodiment, but further increases the ratio that melting nickel slag particle degree is less than 0.074mm.
The present embodiment manufacture method comprises the following steps:
(1) prepare burden:
Red soil nickel ore, nickel flash smelting slag are prepared burden in following ratio, and concrete proportioning is:
Red soil nickel ore 87 parts; Nickel flash smelting slag 13 parts;
Red soil nickel ore material chemical component is identical with benchmark example.Nickel flash smelting slag is identical with embodiment 1.
(2) the levigate process of red soil nickel ore:
By levigate for 87 parts of red soil nickel ores, the ratio that its granularity is less than 0.074mm is 68%.
(3) nickel flash smelting sizing carefully processes:
13 parts of nickel flash smelting sizing are thin, and the ratio that its granularity is less than 0.074mm is 65%, and its molecular water is 1.82%, and its capillary water is greater than 26.67%.。
(4) mixed pelletizing:
Compound pelletizing in balling disc after above-mentioned preprocessing process, obtain water ratio be 16.7%(by weight percentage) pelletizing, median size is 12mm ~ 20mm, and measuring the burst temperature of green pellets is 185 DEG C.
(5) roasting:
Red soil nickel ore pelletizing is carried out roasting baking on equipment, obtains finished product red soil nickel ore pellet.
During roasting, sinter process parameter suitably adjusts according to need of production.
Described in above-described embodiment 1 part is 100kg.
Contrast embodiments of the invention 1 can be found out with benchmark example, and after the nickel flash smelting slag after adapted 13 parts of fine grindings, the burst temperature of green pellets is by 85 DEG C high to 165 DEG C, and the quality of green pellets is improved; Contrast embodiments of the invention 2 and embodiment 1, nickel flash smelting slag number after further raising fine grinding, nickel flash smelting slag after namely adapted 20 parts of fine grindings, the burst temperature of green pellets brings up to 205 DEG C again further, and the quality of green pellets is further enhanced; Contrast embodiments of the invention 3 and embodiment 1, nickel flash smelting slag adapted is still 13 parts, but after its again further fine grinding, after the ratio that its granularity is less than 0.074mm brings up to 65% by 48%, the burst temperature of green pellets also brings up to 185 DEG C by 165 DEG C, and the quality of green pellets is further enhanced.
Claims (2)
1. one kind is improved the method for red soil nickel ore bursting temperature of pellet ores, comprise and adopt red soil nickel ore pelletizing, roasting, it is characterized in that: in red soil nickel ore, add nickel flash smelting slag, first fine grinding pre-treatment is carried out to red soil nickel ore, nickel flash smelting slag, and then batch mixing, pelletizing, roasting, produce red soil nickel ore pellet, the burst temperature of red soil nickel ore pellet is more than 150 DEG C;
The component of described nickel flash smelting slag is: NiO:0.4-1%, TFe:34%-40%, SiO
2: 30-35%, CaO:2-5%, MgO:4-8%, burn out rate 0.3-0.6%.
2. the method for raising red soil nickel ore bursting temperature of pellet ores according to claim 1, is characterized in that: comprise the following steps:
(1) prepare burden:
Red soil nickel ore, nickel flash smelting slag are prepared burden in following ratio, and concrete proportioning is:
Red soil nickel ore 75 ~ 90 parts;
Nickel flash smelting slag 10 ~ 25 parts;
(2) the levigate fine grinding of red soil nickel ore:
Red soil nickel ore is levigate, and its granularity is less than the ratio of 0.074mm between 65 ~ 85%;
(3) nickel flash smelting slag fine grinding:
Nickel flash smelting sizing is thin, and its granularity is less than the ratio of 0.074mm between 45 ~ 75%, and its molecular water is less than 2%, and its capillary water is greater than 25%;
(4) batch mixing, pelletizing:
Compound pelletizing in balling disc after above-mentioned preprocessing process, the particle diameter of its pellet is 12mm ~ 20mm;
(5) roasting:
Red soil nickel ore pelletizing is carried out roasting baking on equipment, obtains finished product red soil nickel ore pellet.
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| CN104458795A (en) * | 2014-12-01 | 2015-03-25 | 武钢集团昆明钢铁股份有限公司 | Method for rapidly and accurately measuring cracking temperature of green pellets |
| CN107338355B (en) * | 2017-07-25 | 2019-01-04 | 唐山东海钢铁集团有限公司 | A method of improving smelting iron and steel bursting temperature of pellet ores |
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| JPS63153226A (en) * | 1986-12-15 | 1988-06-25 | Nkk Corp | Manufacture of agglomerate |
| CN101311286A (en) * | 2007-05-24 | 2008-11-26 | 万天骥 | Process for producing nickel iron from low catarinite |
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| CN101413055A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore |
| AU2008237569A1 (en) * | 2008-02-02 | 2009-08-20 | Sino-Platinum Metals Co. Ltd. | A process for concentration of nickel and joint production of iron red from nickel laterite |
| CN101654737A (en) * | 2008-12-19 | 2010-02-24 | 河南德海源诚矿业有限公司 | Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof |
| CN103114198A (en) * | 2013-01-15 | 2013-05-22 | 山西太钢不锈钢股份有限公司 | Method for utilizing nickel flash smelting water-quenched slag |
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2014
- 2014-04-02 CN CN201410129299.0A patent/CN103882223B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63153226A (en) * | 1986-12-15 | 1988-06-25 | Nkk Corp | Manufacture of agglomerate |
| CN101311286A (en) * | 2007-05-24 | 2008-11-26 | 万天骥 | Process for producing nickel iron from low catarinite |
| AU2008237569A1 (en) * | 2008-02-02 | 2009-08-20 | Sino-Platinum Metals Co. Ltd. | A process for concentration of nickel and joint production of iron red from nickel laterite |
| CN101348862A (en) * | 2008-09-02 | 2009-01-21 | 鞍山市佳良能源技术开发有限公司 | Iron ore pellet adhesive |
| CN101413055A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore |
| CN101654737A (en) * | 2008-12-19 | 2010-02-24 | 河南德海源诚矿业有限公司 | Compound iron ore pellet of molybdenum tailings and sulfate slags and preparation method thereof |
| CN103114198A (en) * | 2013-01-15 | 2013-05-22 | 山西太钢不锈钢股份有限公司 | Method for utilizing nickel flash smelting water-quenched slag |
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