CN103937959A - Low cost and low energy consumption novel method for processing laterite-nickel ore - Google Patents
Low cost and low energy consumption novel method for processing laterite-nickel ore Download PDFInfo
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- CN103937959A CN103937959A CN201410111454.6A CN201410111454A CN103937959A CN 103937959 A CN103937959 A CN 103937959A CN 201410111454 A CN201410111454 A CN 201410111454A CN 103937959 A CN103937959 A CN 103937959A
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Abstract
The invention relates to a low cost and low energy consumption novel method for processing laterite-nickel ore. The method comprises the following steps: introducing bottom blowing flue gas into a rotary klin, calcinating the vulcanized nickel ore or laterite-nickel ore in the rotary klin by utilizing the residual heat of the introduced flue gas, adding the calcinated vulcanized nickel ore or laterite-nickel ore into a bottom blowing furnace; in the bottom blowing furnace, carrying out a matte smelting process on the vulcanized nickel ore to produce low nickel matte, carrying out a reduction smelting process on the laterite-nickel ore to produce nickel iron, or adding a vulcanizing agent into the laterite-nickel ore to carry out a reduction smelting process to produce low nickel matte. The method achieves the successful and high efficient operation of a bottom blowing technology, and fully utilizes the residual heat of flue gas. Moreover, the occupied space of the equipment for the method is small, the bed capacity is high, and the economical and environmental profits are prominent.
Description
Technical field
Nonferrous metallurgy of the present invention field, relates in particular to a kind of low cost less energy-consumption and processes the novel method of red soil nickel ore.
Background technology
At present, the smelting process for production that generally adopts the bodies of heater such as blast furnace, electric furnace, blast furnace to smelt the nickel minerals of crossing through rotary kiln calcination process to produce ferronickel or low nickel matte in nickel smelting industry, does not temporarily also use bottom convertor to carry out the production technique of the smelting of nickel minerals both at home and abroad.In Blast Furnace Method smelting process, using coke burning heat release as thermal source, this method is because consuming a large amount of high grade cokes, seriously polluted and behave and denounce; Blast furnace process is to be mainly borrowed in existing ironmaking small furnace to change the line of production, and this technique is still using coke burning heat release as smelting heat energy, but the restriction 400m of country
3the use of following small furnace, therefore large capacity blast furnace investment is larger; It is large that electrosmelting also exists power consumption, and when the electricity charge are higher, production cost is high, and furnace charge water content is required to strict (not higher than 3%), when desulfurization degree low (16%-20%) is processed the high material of sulphur content, and deficiency that must the pre-desulfurization of roasting before melting.
Summary of the invention
For the problem of current existence, the present invention relies on National 863 science and technology supporting project " many metals of oxygen bottom-blowing trapping technique " project, bottom blowing technology is applied on nickel smelting and nickel-base material, propose a kind of low cost less energy-consumption and process the novel method of red soil nickel ore, the metals such as the nickel in the raw material such as slag, ash, cobalt, chromium are carried out to effectively comprehensive extraction, main goal of the invention be following some:
(1) realize and use bottom convertor to carry out the successful implementation of nickel smelting production ferronickel or low nickel matte technique, and there is good economic benefits;
(2) this technique main equipment is bottom convertor, and equipment is reliable, and long service life is simple to operate;
(3) utilize bottom convertor to smelt and produce ferronickel or low nickel matte, bottom convertor flue gas is introduced rotary kiln to entering stove material through row drying and roasting, reduces energy consumption, has improved smelting thermo-efficiency, has avoided the deficiency of other techniques;
(4) simplify ferronickel or the low nickel matte technological process of production, save the operation that part is numerous and diverse, comprehensively reclaim various metals resources, increase economic efficiency.
Described method comprises the steps:
(1) bottom blowing flue gas is introduced to rotary kiln, utilize the fume afterheat of introducing to carry out roasting to the nickel sulfide ore in described time brickkiln or red soil nickel ore;
(2) nickel sulfide ore or red soil nickel ore through roasting are added to bottom convertor;
(3), in bottom convertor, produce low nickel matte, red soil nickel ore is carried out retailoring production ferronickel or red soil nickel ore added to vulcanizing agent and carry out retailoring production low nickel matte by nickel sulfide ore being carried out to matte smelting.
Wherein, in described bottom convertor, use Sweet natural gas, coal dust or coke powder for fuel carries out melting, the carbon in the CO (carbon monoxide converter) gas generating in fusion process or coal dust, coke is as reductive agent.Described vulcanizing agent is sulphur, pyrite or gypsum.
When nickel sulfide ore is carried out to matte smelting production low nickel matte, nickel sulfide ore per ton adds 70-90KG coal dust, allocates quartzite into according to iron level in nickel sulfide ore, controls Fe/SiO
2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
When red soil nickel ore is carried out to retailoring production ferronickel, red soil nickel ore per ton adds 115-130KG coke powder, controls MgO/SiO2=0.55-0.75; Smelting temperature 1300-1700 DEG C, oxygen is dense 75%, and oxygen material ratio is controlled at the dry ore deposit of 120-130Nm3/t.
When red soil nickel ore interpolation vulcanizing agent is carried out to retailoring production low nickel matte, 250-350KG pyrite is added in the dry ore deposit of red soil nickel ore per ton, 90-100kg coke powder, and Fe, MgO, SiO2 comprehensive parameters are controlled at MgO/SiO2=0.6, Fe/SiO2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
Described roasting process adopts rotary kiln baking, and roasting utilizes the utilization of bottom convertor fume afterheat, inlet flue gas temperature 1100-1300 DEG C, and outlet cigarette temperature 600-800 DEG C, maturing temperature 600-800 DEG C, material is at revolution kiln residence time 1.5-2.5h.
The method tool with bottom convertor smelting ferronickel or low nickel matte that the present invention proposes has the following advantages:
(1) success that this technique has realized bottom convertor technology efficiently moves, and fume afterheat makes full use of, and floor space is little, and bed ability is high, and economic benefit and environmental benefit are remarkable;
(2) material (including, but not limited to high temperature resistant magnesium refractory brick processed, refractory mortar etc.) of this technique main equipment bottom convertor employing high-temperature corrosion resistance is liner, and equipment is reliable, long service life, easy maintenance;
(3) this technique use Sweet natural gas is fuel, and high compared with blast furnace and high furnace thermal efficiency, environment protecting is good, lower than electric furnace energy consumption;
(4) the successful development of this technique, for the successful industrial implementation of the new process of production of ferronickel or low nickel matte in nickel smelting provides technical support.
Brief description of the drawings
Fig. 1: the schema by bottom convertor smelting ferronickel or low nickel matte method of the present invention.
Fig. 2: the equipment connection mode one of processing red soil nickel ore for a kind of low cost less energy-consumption of the present invention.
Fig. 3: the equipment connection mode two of processing red soil nickel ore for a kind of low cost less energy-consumption of the present invention.
Wherein: 1-smelting furnace, 2-smelting furnace smoke outlet, 3-kiln hood, 4-flue gas, 5-rotary kiln.
Embodiment
As shown in Figure 1, the method with bottom convertor smelting ferronickel or low nickel matte of the present invention mainly comprises the steps:
(1) bottom blowing flue gas is introduced to rotary kiln, utilize the fume afterheat of introducing to carry out roasting to the nickel sulfide ore in described time brickkiln or red soil nickel ore;
(2) nickel sulfide ore or red soil nickel ore through roasting are added to bottom convertor;
(3), in bottom convertor, produce low nickel matte, red soil nickel ore is carried out retailoring production ferronickel or red soil nickel ore added to vulcanizing agent and carry out retailoring production low nickel matte by nickel sulfide ore being carried out to matte smelting.
Wherein, in described bottom convertor, use Sweet natural gas, coal dust or coke powder for fuel carries out melting, the carbon in the CO (carbon monoxide converter) gas generating in fusion process or coal dust, coke is as reductive agent.Described vulcanizing agent is sulphur, pyrite or gypsum.
When nickel sulfide ore is carried out to matte smelting production low nickel matte, nickel sulfide ore per ton adds 70-90KG coal dust, allocates quartzite into according to iron level in nickel sulfide ore, controls Fe/SiO2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
When red soil nickel ore is carried out to retailoring production ferronickel, red soil nickel ore per ton adds 115-130KG coke powder, controls MgO/SiO2=0.55-0.75; Smelting temperature 1300-1700 DEG C, oxygen is dense 75%, and oxygen material ratio is controlled at the dry ore deposit of 120-130Nm3/t.
When red soil nickel ore interpolation vulcanizing agent is carried out to retailoring production low nickel matte, 250-350kg pyrite is added in the dry ore deposit of red soil nickel ore per ton, 90-100kg coke powder, and Fe, MgO, SiO2 comprehensive parameters are controlled at MgO/SiO2=0.6, Fe/SiO2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
Described roasting process adopts rotary kiln baking, and roasting utilizes the utilization of bottom convertor fume afterheat, inlet flue gas temperature 1100-1300 DEG C, and outlet cigarette temperature 600-800 DEG C, maturing temperature 600-800 DEG C, material is at revolution kiln residence time 1.5-2.5h.
Described method is produced the ferronickel or the low nickel matte that obtain and is discharged by bottom convertor oblique below ferronickel or low nickel matte discharge outlet, and just reaches the production technique of the waste (nickeliferous≤0.1%) of nickeliferous waste standard without processing or simple process (including, but not limited to electric dilution and slag flotation etc.) from cinder notch discharge.In bottom convertor, carry out oxygen-enriched bottom-blowing high temperature bath smelting, complete the retailoring process of ferronickel in bottom blowing region, its reaction mechanism is that nickel oxide and the ferriferous oxide in nickel oxide ore generated high-temperature fusant ferronickel by carbon monoxide or carbon reduction, good in settling region slag phase and ferronickel phase-splitting, slag blanket is nickeliferous low.Production low nickel matte process is mainly makes sulfonium reaction, and nickel sulfide ore oxygen-enriched bottom-blowing matte smelting and red soil nickel ore add vulcanizing agent and make sulfonium retailoring generation low nickel matte, and controlling slag type is optimum regime, MgO/SiO
2=0.6-0.7, nickeliferous low in slag, low nickel matte and slag blanket phase-splitting are good, and reaching bottom blowing slag is disposable or process simple process enriching nickel without processing.
As shown in Figures 2 and 3, the mode of connection of the main equipment in present method is as follows: after bottom convertor exhanst gas outlet, connect rotary kiln end, flue gas directly enters material in rotary kiln drying rotary kiln by bottom convertor smoke outlet; Material enters smelting furnace through rotary kiln end by smelting furnace smoke outlet; Wherein between bottom convertor and rotary kiln, can select two kinds of mode of connection, a kind of for being arranged vertically, another kind of for being arranged in parallel.
The main equipment bottom convertor of present method, bed ability is high, and thermo-efficiency is high, and in stove, field of flow stirs strong, adopting the refractory materials (including, but not limited to high temperature resistant magnesium refractory brick processed, refractory mortar etc.) of high-temperature corrosion resistance is liner, for keeping furnace high-temperature, the thickening of refractory brick thickness, additional one layer of heat preservation layer, all the other do not carry out special transformation, equipment is reliable, long service life, easy maintenance.
The present invention, by using bottom convertor device, uses Direct Reductive Melting or matte smelting novel process, finally makes commodity ferronickel or the raw material low nickel matte for bottom operation.After implementing, compared with original nickel smelting process for production system, there is obvious advantage: flow process is simplified greatly, processing costs obviously reduces, increase economic benefit, also solved nickel and smelted the high problem of smelting cost, for the successful industrial implementation of the new process of production of ferronickel or low nickel matte in nickel smelting provides technical support.Meanwhile, present method also has that occupation area of equipment is less, and flow process is short, reduced investment, the advantage such as economic benefit and environmental benefit are remarkable.
The spirit and scope of the present invention limit; do not departing under the prerequisite of design concept of the present invention; various modification and improvement that in this area, common engineering technical personnel make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents of request protection of the present invention, has all been documented in claims.
Claims (8)
1. a novel method for red soil nickel ore is processed in low cost less energy-consumption, it is characterized in that comprising following steps:
(1) bottom blowing flue gas is introduced to rotary kiln, utilize the fume afterheat of introducing to carry out roasting to the nickel sulfide ore in described time brickkiln or red soil nickel ore;
(2) nickel sulfide ore or red soil nickel ore through roasting are added to bottom convertor;
(3), in bottom convertor, produce low nickel matte, red soil nickel ore is carried out retailoring production ferronickel or red soil nickel ore added to vulcanizing agent and carry out retailoring production low nickel matte by nickel sulfide ore being carried out to matte smelting.
2. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, wherein in described bottom convertor, use Sweet natural gas, coal dust or coke powder for fuel carries out melting, the carbon in the CO (carbon monoxide converter) gas generating in fusion process or coal dust, coke is as reductive agent.
3. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, and wherein said vulcanizing agent is sulphur, pyrite or gypsum.
4. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, and while wherein nickel sulfide ore being carried out to matte smelting production low nickel matte, nickel sulfide ore per ton adds 70-90KG coal dust, allocates quartzite into according to iron level in ore deposit, controls Fe/SiO
2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
5. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, and while wherein red soil nickel ore being carried out to retailoring production ferronickel, red soil nickel ore per ton adds 115-130KG coke powder, controls MgO/SiO2=0.55-0.75; Smelting temperature 1300-1700 DEG C, oxygen is dense 75%, and oxygen material ratio is controlled at the dry ore deposit of 120-130Nm3/t.
6. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, while wherein red soil nickel ore interpolation vulcanizing agent being carried out to retailoring production low nickel matte, 250-350KG pyrite is added in the dry ore deposit of red soil nickel ore per ton, 90-100kg coke powder, Fe, MgO, SiO2 comprehensive parameters are controlled at MgO/SiO2=0.6, Fe/SiO2=1.7-1.8; Smelting temperature is 1180 DEG C-1250 DEG C, and oxygen is dense 75%, and oxygen material ratio is controlled at 140-150Nm3/t and enters stove mineral aggregate.
7. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as claimed in claim 1, wherein said roasting process adopts rotary kiln baking, roasting utilizes the utilization of bottom convertor fume afterheat, inlet flue gas temperature 1100-1300 DEG C, outlet cigarette temperature 600-800 DEG C, maturing temperature 600-800 DEG C, material is at revolution kiln residence time 1.5-2.5h.
8. the novel method of red soil nickel ore is processed in a kind of low cost less energy-consumption as described in claim as arbitrary in claim 1-7, wherein the kiln hood of rotary kiln is connected on after bottom convertor exhanst gas outlet, and flue gas directly enters material in rotary kiln drying rotary kiln by the smoke outlet of bottom convertor; Material enters smelting furnace through the kiln hood of described rotary kiln by described smelting furnace smoke outlet; Wherein between bottom convertor and rotary kiln for being arranged vertically or being arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410111454.6A CN103937959A (en) | 2014-03-25 | 2014-03-25 | Low cost and low energy consumption novel method for processing laterite-nickel ore |
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| CN201410111454.6A CN103937959A (en) | 2014-03-25 | 2014-03-25 | Low cost and low energy consumption novel method for processing laterite-nickel ore |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463214A (en) * | 2015-07-27 | 2016-04-06 | 潘料庭 | Method for producing high-nickel iron by adopting low-grade laterite-nickel ores |
| CN107312938A (en) * | 2017-08-30 | 2017-11-03 | 徐州贝克福尔节能环保技术有限公司 | A kind of side-blown furnace smelting nickel-iron equipment of lateritic nickel ore and technique |
| CN113293296A (en) * | 2021-05-31 | 2021-08-24 | 中伟新材料股份有限公司 | Method for producing low grade nickel matte by melting, reducing and vulcanizing nickel oxide ore |
| CN114350977A (en) * | 2021-12-13 | 2022-04-15 | 中南大学 | Method for extracting nickel and cobalt from laterite-nickel ore through circulating vulcanization |
| CN114854997A (en) * | 2022-03-31 | 2022-08-05 | 中南大学 | Injection type sulfur supplement and strengthening vulcanization method for laterite-nickel ore vulcanization smelting |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105463214A (en) * | 2015-07-27 | 2016-04-06 | 潘料庭 | Method for producing high-nickel iron by adopting low-grade laterite-nickel ores |
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| CN107312938A (en) * | 2017-08-30 | 2017-11-03 | 徐州贝克福尔节能环保技术有限公司 | A kind of side-blown furnace smelting nickel-iron equipment of lateritic nickel ore and technique |
| CN113293296A (en) * | 2021-05-31 | 2021-08-24 | 中伟新材料股份有限公司 | Method for producing low grade nickel matte by melting, reducing and vulcanizing nickel oxide ore |
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| CN114350977A (en) * | 2021-12-13 | 2022-04-15 | 中南大学 | Method for extracting nickel and cobalt from laterite-nickel ore through circulating vulcanization |
| CN114854997A (en) * | 2022-03-31 | 2022-08-05 | 中南大学 | Injection type sulfur supplement and strengthening vulcanization method for laterite-nickel ore vulcanization smelting |
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