CN103409629A - Laterite gas base reduction method - Google Patents
Laterite gas base reduction method Download PDFInfo
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- CN103409629A CN103409629A CN2013102879199A CN201310287919A CN103409629A CN 103409629 A CN103409629 A CN 103409629A CN 2013102879199 A CN2013102879199 A CN 2013102879199A CN 201310287919 A CN201310287919 A CN 201310287919A CN 103409629 A CN103409629 A CN 103409629A
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Abstract
The invention discloses a laterite gas base reduction method which comprises the following steps: pelletizing laterite-nickel ore, binding agent, reduction coal and regulator to obtain laterite-nickel ore pellets; adding the laterite-nickel ore pellets into a reduction device; and introducing coke furnace raw gas into the reduction device as a reducer, and carrying out reduction reaction at 900-1300 DEG C to obtain ferronickel alloy and smelting waste gas. The method can be effectively utilized to prepare the ferronickel alloy.
Description
Technical field
The present invention relates to field of metallurgy.Particularly, the present invention relates to a kind of laterite gas base method of reducing.
Background technology
Red soil nickel ore is one of rare ore deposit product, owing to being subjected to the restriction of Ore smelting tech and the higher restriction of production cost, is never developed well for a long time, makes a large amount of mineral deposits (body) be able to more intact preservation.In recent years along with the development of smelting technology and the reduction of production cost, the continuous increase of nickel demand in addition, the red soil nickel ore ground development and utilization that now obtained becoming more and more important, become China and even the global industrial production main source with nickel.
Yet the smelting laterite-nickel ores method, still remain to be improved at present.
Summary of the invention
The present invention is intended to solve at least one of technical problem existed in prior art.For this reason, the present invention proposes the effectively method of smelting red clay nickel ore.
According to embodiments of the invention, the method comprises: by red soil nickel ore, binding agent, go back raw coal and adjusting agent is made pelletizing, in order to obtain the red soil nickel ore pelletizing; Described red soil nickel ore pelletizing is joined in reducing apparatus; And introduce the reformation coke-oven gas as reductive agent in described reducing apparatus, and carry out reduction reaction under 900 degrees centigrade～1300 degrees centigrade, in order to obtain Rhometal and smelting exhaust gas.Thus, utilize the smelting laterite-nickel ores method according to the embodiment of the present invention, can effectively utilize coal oven dithio-gas reduction red soil nickel ore, make Rhometal.
According to embodiments of the invention, above-mentioned smelting laterite-nickel ores method can also have following additional technical feature:
According to one embodiment of present invention, based on the total mass of described pelletizing, the content of described adjusting agent is 5 mass parts～20 mass parts, and the content of described red soil nickel ore is 75 mass parts～93 mass parts, and the content of described binding agent is 2 mass parts～5 mass parts.Thus, can effectively prepare the red soil nickel ore pelletizing, and can further improve the efficiency of utilizing coal oven dithio-gas reduction red soil nickel ore, thereby can further effectively make Rhometal.
According to one embodiment of present invention, described adjusting agent is be selected from lime, Wingdale, sodium carbonate and calcium carbonate at least a.Thus, adjusting agent can reduce the red soil nickel ore fusing point, promote silicate minerals nickeliferous in ore, iron to decompose, reach the purpose that promotes reduction reaction.
According to one embodiment of present invention, described binding agent is for being selected from Attapulgite, clay and kaolinic at least a.Thus, binding agent can improve the pelletizing shock resistance.
According to one embodiment of present invention, described reducing apparatus be selected from vertical reduction furnace and fluidized-bed one of at least.Thus, utilize this reducing apparatus can utilize more efficiently reformation coke-oven gas reduction red soil nickel ore, thereby be suitable for producing in enormous quantities.
According to one embodiment of present invention, the temperature of described coal oven dithio-gas is 800 degrees centigrade～850 degrees centigrade.Thus, utilization is according to the smelting laterite-nickel ores method of the embodiment of the present invention, coal oven dithio-gas can reduce red soil nickel ore effectively, make Rhometal, and utilize the heat of coal oven dithio-gas, can save the needed additional heat of reduction system, thereby reduce the production cost that utilizes coal oven dithio-gas reduction red soil nickel ore.
According to one embodiment of present invention, described coal oven dithio-gas is the coal oven dithio-gas produced by coking.Thus, turn waste into wealth, utilize coal oven dithio-gas both can effectively reduce red soil nickel ore, further can make Rhometal, can avoid again directly discharging coal oven dithio-gas and can pollute physical environment.
According to one embodiment of present invention, the form with the mixture of coal oven dithio-gas and shielding gas, be incorporated into described coal oven dithio-gas in described reducing apparatus, and wherein, described shielding gas is be selected from nitrogen and argon gas at least a.Thus, shielding gas can reduce the oxidation of coal gas effectively, and can effectively avoid O in reducing apparatus
2/ CO ratio is too high blasts, thereby guarantees production safety.
According to one embodiment of present invention, in described coal oven dithio-gas is incorporated into to described reducing apparatus before, utilize described smelting exhaust gas to carry out preheating to described pelletizing, and to the processing of reforming of described coal oven dithio-gas, in order to obtain the reformation coke-oven gas.Thus, can utilize fully the entrained heat of smelting exhaust gas on the one hand, reduce the required heat exhaustion of reduction reaction, thereby be conducive to reduce production costs, can purify coal oven dithio-gas by reformation on the one hand in addition, remove impurity, thereby be conducive to improve reduction reaction efficiency.
According to one embodiment of present invention, utilizing before described smelting exhaust gas carries out preheating to described pelletizing, described smelting exhaust gas is carried out to dust removal process.Thus, can effectively remove the impurity in smelting exhaust gas, reduce the loss of smelting exhaust gas to equipment, thus the work-ing life of extension device.
According to one embodiment of present invention, the diameter of described pelletizing is 10 millimeters～20 millimeters.Thus, can effectively improve material bed ventilation property in reducing apparatus, improve the kinetics of reduction condition.
According to one embodiment of present invention, the described raw coal of going back is be selected from coking coal, hard coal, bituminous coal at least a.Thus, can effectively accelerate red soil nickel ore reduction reaction speed in pelletizing, improve reduction reaction efficiency.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
The accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding the description of embodiment, becoming in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic flow sheet of smelting laterite-nickel ores method according to an embodiment of the invention; And
Fig. 2 has shown the structural representation of implementing according to an embodiment of the invention smelting laterite-nickel ores method equipment;
Fig. 3 has shown the structural representation of enforcement smelting laterite-nickel ores method equipment according to a different embodiment;
Fig. 4 has shown according to the present invention the structural representation of the enforcement smelting laterite-nickel ores method equipment of another embodiment;
Fig. 5 has shown according to the present invention the structural representation of the enforcement smelting laterite-nickel ores method equipment of another embodiment.
Embodiment
Below describe embodiments of the invention in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Below by the embodiment be described with reference to the drawings, be exemplary, only be used to explaining the present invention, and can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, term " is connected " and should does broad understanding, for example, can be to be fixedly connected with, and can be also to removably connect, or connects integratedly; Can be mechanical connection, can be also to be electrically connected to; Can be directly to be connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
The present invention proposes a kind of smelting laterite-nickel ores method, with reference to figure 1, according to embodiments of the invention, the smelting laterite-nickel ores method can comprise the following steps:
S100: ball processed
According to embodiments of the invention, in this step, by red soil nickel ore, binding agent, go back raw coal and adjusting agent is made pelletizing.
The implication of the term used in the present invention " red soil nickel ore " refers to the mineral substance used in relating to the industrial production of nickel any.According to embodiments of the invention, the kind of red soil nickel ore is not particularly limited, and for example, can be limonite, earthy cobalt, nontronite, serpentine, noumeite, can be also other any mineral substance that contains nickel.Traditional Proress Technolgies of Laterite-nickel Ore has two kinds of wet method smelting process and pyrometallurgical smelting process.The present inventor finds, the composition of red soil nickel ore is very complicated, usually contain numerous impurity elements, calcium for example, magnesium, aluminium, chromium, silicon, sulphur etc., thereby, when utilizing wet method smelting process to process red soil nickel ore, often use number of chemical reagent, and carry out the multi-step chemical reaction, and these impurity elements also can participate in relevant chemical reaction, cause interference, thereby the processing to red soil nickel ore causes disadvantageous effect, if employing pyrometallurgical smelting process, general first want dry ore to remove free-waters all in ore and in conjunction with water, and then through roasting and melting processing etc., these processes all need to consume a large amount of fuel (as coal, oil or electric energy), energy consumption is larger, production cost is higher, therefore, in fact at present there is no the method that can effectively process red soil nickel ore.The present inventor is surprised to find, and by method of the present invention, can effectively to red soil nickel ore, process, and makes Rhometal.
According to embodiments of the invention, red soil nickel ore major impurity content is as shown in table 1 below:
Table 1 red soil nickel ore major impurity content
| Form | SiO 2 | Al 2O 3 | CaO | MgO | Cr 2O 3 | Ni | Fe |
| Massfraction (%) | 42.1 | 1.2 | 0.8 | 23.2 | 0.6 | 2.0 | 14.0 |
The contriver finds, compares with directly red soil nickel ore reduce to process, and carries out reduction reaction after red soil nickel ore is made to pelletizing again, can improve the interior ventilation property of stove, improves the kinetics of reduction condition, thereby is conducive to improve reduction reaction efficiency.
According to embodiments of the invention, pelletizing ingredient and composition means thereof are not particularly limited, and for example, according to some embodiments of the present invention, pelletizing contains red soil nickel ore, binding agent, goes back raw coal and adjusting agent.The contriver finds, in pelletizing, add binding agent can improve the pelletizing shock resistance, add adjusting agent can reduce the red soil nickel ore fusing point, promote silicate minerals nickeliferous in ore, iron to decompose, reach the purpose that promotes reduction reaction, add and go back raw coal and can effectively accelerate red soil nickel ore reduction reaction speed in pelletizing, improve reduction reaction efficiency.
According to some embodiments of the present invention, based on the total mass of pelletizing, the content of adjusting agent is 5 mass parts～20 mass parts, and the content of red soil nickel ore is 75 mass parts～93 mass parts, and the content of binding agent is 2 mass parts～5 mass parts.Thus, can effectively prepare the red soil nickel ore pelletizing, and can further improve the efficiency of utilizing coal oven dithio-gas reduction red soil nickel ore, thereby can further effectively make Rhometal.
According to embodiments of the invention, the kind of adjusting agent is not particularly limited.For example according to a particular embodiment of the invention, adjusting agent is be selected from lime, Wingdale, sodium carbonate and calcium carbonate at least a.Thus, adjusting agent can reduce the red soil nickel ore fusing point, promote silicate minerals nickeliferous in ore, iron to decompose, and reaches the purpose that promotes reduction reaction, thereby is conducive to reduce the required heat exhaustion of reduction reaction, is conducive to reduce production costs.
According to embodiments of the invention, the kind of binding agent is not particularly limited.For example according to a particular embodiment of the invention, binding agent is for being selected from Attapulgite, clay and kaolinic at least a.Thus, binding agent strengthens the soundness of pelletizing, can further improve the pelletizing shock resistance.
According to embodiments of the invention, the kind of going back raw coal is not particularly limited.For example according to a particular embodiment of the invention, going back raw coal is be selected from coking coal, hard coal, bituminous coal at least a.Thus, can effectively accelerate red soil nickel ore reduction reaction speed in pelletizing, improve reduction reaction efficiency.
According to embodiments of the invention, the size dimension of pelletizing is not particularly limited.For example according to a particular embodiment of the invention, the diameter of pelletizing is 10 millimeters～20 millimeters.Thus, can effectively improve material bed ventilation property in reducing apparatus, improve the kinetics of reduction condition, improve anti-reduction reaction efficiency.
S200: reduction reaction
After red soil nickel ore is made to pelletizing, can be by resultingly containing adjusting agent, binding agent, the pelletizing of going back raw coal and red soil nickel ore joins in reducing apparatus, thereby can with reductive agent generation reduction reaction.Concrete, according to embodiments of the invention, in this step, at first, resulting red soil nickel ore pelletizing is joined in reducing apparatus, next, introduce coal oven dithio-gas as reductive agent in the reducing apparatus that loads the red soil nickel ore pelletizing, and carry out reduction reaction under 900 degrees centigrade～1300 degrees centigrade, thereby can obtain Rhometal and smelting exhaust gas.
According to embodiments of the invention, reducing apparatus is not particularly limited, and can adopt any known device, for example, according to a particular embodiment of the invention, reducing apparatus be selected from vertical reduction furnace and fluidized-bed one of at least.Thus, utilize this reducing apparatus can utilize more efficiently coal oven dithio-gas reduction red soil nickel ore, thereby be suitable for producing in enormous quantities.According to one embodiment of present invention, described reducing apparatus is composed in series by more than one described reduction reaction chamber, by the high-temperature material of first step reactor output directly with the hot form second stage reactor of packing into, by that analogy.Thus, can further improve the reduction reaction efficiency of red soil nickel ore in reducing apparatus.
According to embodiments of the invention, the processing parameter of reduction reaction is not particularly limited, and those skilled in the art can be as required, or determines by experiment in advance.For example according to a particular embodiment of the invention, under 900 degrees centigrade～1300 degrees celsius, carry out reduction reaction.Thus, utilization is according to the smelting laterite-nickel ores method of the embodiment of the present invention, coal oven dithio-gas can reduce red soil nickel ore effectively, make Rhometal, and utilize the heat of coal oven dithio-gas, can save the needed additional heat of reduction system, thereby reduce the production cost that utilizes coal oven dithio-gas reduction red soil nickel ore.
According to embodiments of the invention, source and the ingredient thereof of coal oven dithio-gas are not particularly limited.For example according to some embodiments of the present invention, coal oven dithio-gas is the coal oven dithio-gas produced by coking.The contriver finds, the main component of coal oven dithio-gas is generally hydrogen (55 volume %～60 volume %) and methane (23 volume %～27 volume %), also contain in addition a small amount of carbon monoxide (5 volume %～8 volume %), the above unsaturated hydrocarbons of C2 (2 volume %～4 volume %), carbonic acid gas (1.5 volume %～3 volume %), oxygen (0.3 volume %～0.8 volume %), nitrogen (3 volume %～7 volume %) etc., if directly use, matter of utmost importance is easy blast, security is very low, and coal oven dithio-gas also contains more tar and the impurity of naphthalene, if purify bad, will blocking pipe and pipe fitting, give and adjust the firer to bring difficulty.In addition, the temperature of coal oven dithio-gas is higher, is generally 800 degrees centigrade～850 degrees centigrade, and this heat is if rationally use will greatly reduce the required heat exhaustion of reduction reaction.Above-mentioned pelletizing is carried out to the needed temperature of reduction reaction is 900 degrees centigrade～1300 degrees centigrade but owing to carrying out coal oven dithio-gas; therefore the contriver utilizes heat exchanger to effectively utilize the hydrogen partial in the coal oven dithio-gas be not fully utilized after the generation reduction reaction; not only for the temperature that improves coal oven dithio-gas, provide heat; improved simultaneously the utilization ratio of coal oven dithio-gas; thereby be conducive to reduce production costs; simultaneously, also help the saving energy, preserve the ecological environment.For for example the problems referred to above, the contriver finds in research, if coal oven dithio-gas adds some shielding gas, can effectively prevent easily the explode generation of problem of coal oven dithio-gas, and for example shielding gas can reduce the oxidation of coal gas effectively, prevents O in reducing apparatus
2/ CO ratio is too high and blast, thereby guarantees production safety.According to embodiments of the invention, the kind of shielding gas is not particularly limited, and for example shielding gas can be for being selected from least a of nitrogen and argon gas.In the present invention, in coal oven dithio-gas is incorporated into to reducing apparatus before, the stove raw gas that the prefocuses processing of reforming.Thus, can utilize fully the entrained heat of coal oven dithio-gas on the one hand, reduce the required heat exhaustion of reduction reaction, thereby be conducive to reduce production costs, can purify coal oven dithio-gas by reformation on the one hand in addition, remove impurity, thereby be conducive to improve reduction reaction efficiency.
In the reduction reaction process, can produce a large amount of smelting exhaust gas, the general treatment process of prior art is direct discharge, and in the present invention, but turn waste into wealth, take full advantage of the entrained heat of smelting exhaust gas pelletizing is carried out to preheating, thereby can reduce the required heat exhaustion of reduction reaction, be conducive to reduce production costs, and utilizing before smelting exhaust gas carries out preheating to pelletizing, first smelting exhaust gas is carried out to dust removal process, thereby can effectively remove the impurity in smelting exhaust gas, reduce the loss of smelting exhaust gas to equipment, extend the work-ing life of equipment.
Above part is described in detail the smelting laterite-nickel ores method, in order to understand better the method, below the equipment that can implement the method is described again.
According to a further aspect in the invention, the present invention proposes a kind of smelting laterite-nickel ores equipment.With reference to figure 2, according to embodiments of the invention, smelting laterite-nickel ores equipment 1000 comprises: ball-making device 100, reducing apparatus 200 and coal oven dithio-gas generating unit 300.According to embodiments of the invention, ball-making device 100 for by red soil nickel ore, binding agent, go back raw coal and adjusting agent is made pelletizing; Reducing apparatus 200 is connected with ball-making device 100, and is limited with the reduction reaction chamber in original device 200, in order to receive the pelletizing from described ball-making device 100; Coal oven dithio-gas generating unit 300 is connected with reducing apparatus 200, for to described reduction reaction chamber, introducing coal oven dithio-gas.Thus, utilize and can effectively implement the smelting laterite-nickel ores method according to the smelting laterite-nickel ores equipment 1000 of the embodiment of the present invention, thereby can effectively utilize coke oven coal shortage gas reduction red soil nickel ore, make Rhometal.
According to embodiments of the invention, the kind of adjusting agent is not particularly limited.For example according to a particular embodiment of the invention, adjusting agent is be selected from lime, Wingdale, sodium carbonate and calcium carbonate at least a.Thus, adjusting agent can reduce the red soil nickel ore fusing point, promote silicate minerals nickeliferous in ore, iron to decompose, and reaches the purpose that promotes reduction reaction, thereby is conducive to reduce the required heat exhaustion of reduction reaction, is conducive to reduce production costs.
According to embodiments of the invention, the kind of binding agent is not particularly limited.For example according to a particular embodiment of the invention, binding agent is for being selected from Attapulgite, clay and kaolinic at least a.Thus, binding agent strengthens the steadiness of pelletizing, can further improve the pelletizing shock resistance.
According to embodiments of the invention, the kind of going back raw coal is not particularly limited.For example according to a particular embodiment of the invention, going back raw coal is be selected from coking coal, hard coal, bituminous coal at least a.Thus, can effectively accelerate red soil nickel ore reduction reaction speed in pelletizing, improve reduction reaction efficiency.
According to embodiments of the invention, the size dimension of pelletizing is not particularly limited.For example according to a particular embodiment of the invention, the diameter of pelletizing is 10 millimeters～20 millimeters.Thus, can effectively improve material bed ventilation property in reducing apparatus, improve the kinetics of reduction condition, improve anti-reduction reaction efficiency.
According to embodiments of the invention, reducing apparatus 200 for be selected from vertical reduction furnace and fluidized-bed one of at least.Thus, utilize this reducing apparatus can utilize more efficiently coal oven dithio-gas reduction red soil nickel ore, thereby be suitable for producing in enormous quantities.
According to embodiments of the invention, coal oven dithio-gas generating unit 300 is coking furnaces.Thus, utilize this coal oven dithio-gas can further effectively reduce red soil nickel ore, make Rhometal, thereby be conducive to reduce production costs, simultaneously, also help environment protection.
With reference to figure 5, according to one embodiment of present invention, smelting laterite-nickel ores equipment 1000 further comprises: drying installation 700, described drying installation 700 is connected with reducing apparatus 200 with ball-making device 100 respectively, for described pelletizing is carried out to drying treatment.Thus, can before material is carried out to reduction reaction, carry out in advance drying treatment, effectively remove the moisture in material, and realize the unification to the raw meal particle size size in drying installation, thereby be conducive to the carrying out of follow-up reduction reaction, improve reduction reaction efficiency.According to the specific embodiment of the invention profit, described drying installation is at least a of rotary kiln and cyclone dryer.Thus, can effectively to the material that carries out reduction reaction, carry out drying treatment, thereby improve the efficiency of follow-up reduction reaction.
With reference to figure 3, according to embodiments of the invention, smelting laterite-nickel ores equipment 1000 further comprises: coal oven dithio-gas reformer 500, and this coal gas reformer 500 is connected with described coal oven dithio-gas generating unit 300, so that to the coal oven dithio-gas processing of reforming, obtain the reformation coke-oven gas; And heat exchanger 400, this heat exchanger 400 is arranged between described reducing apparatus 200 and described coal oven dithio-gas generating unit 300, in order to before 200, the reformation coke-oven gas is carried out to thermal pretreatment in the reformation coke-oven gas is incorporated into to described reducing apparatus, thereby will be heated to the temperature of reaction in the reduction reaction device by the coal oven dithio-gas that the coal oven dithio-gas generating unit is discharged, meet the requirement of reduction reaction thermodynamics.Thus, can utilize fully the entrained heat of coal oven dithio-gas on the one hand, reduce the required heat exhaustion of reduction reaction, thereby be conducive to reduce production costs, can purify coal oven dithio-gas by reformation on the one hand in addition, remove impurity, thereby be conducive to improve reduction reaction efficiency.
According to one embodiment of present invention, described heat exchanger is to utilize the flue gas after described reduction reaction and high pressure oxygen are burnt heat is provided.Thus; can effectively utilize the hydrogen partial occurred in the coal oven dithio-gas be not fully utilized after reduction reaction; not only for the temperature that improves coal oven dithio-gas, provide heat; improved simultaneously the utilization ratio of coal oven dithio-gas; thereby be conducive to reduce production costs; simultaneously, also help the saving energy, preserve the ecological environment.
With reference to figure 4, according to embodiments of the invention, smelting laterite-nickel ores equipment further comprises cleaning apparatus 600, this cleaning apparatus 600 is connected with reducing apparatus 200, reducing apparatus 200 produces in the reduction reaction process smelting exhaust gas is introduced in cleaning apparatus 600, through dust removal process, then get back in heat exchanger 400, because the coal oven dithio-gas of being discharged by coking furnace is generally 800 degrees centigrade～850 degrees centigrade, in order to reach in reducing apparatus, carry out reduction reaction with above-mentioned pelletizing, reach the thermodynamical reaction requirement, therefore need to be through Overheating Treatment, the contriver is in order to save the energy, save cost, reach taking full advantage of the coal oven dithio-gas for reduction reaction, therefore use the smelting exhaust gas that contains hydrogen of removing dust from discharging and pass through cleaning apparatus 600 reducing apparatus 200 to heat and reach 900 degrees centigrade～1300 degrees centigrade the coal oven dithio-gas through reforming, thereby reach the thermodynamics requirement of reduction reaction, with pelletizing, carry out reduction reaction, so circulation.Thus, can take full advantage of the entrained heat of smelting exhaust gas carries out preheating to pelletizing on the one hand, thereby can reduce the required heat exhaustion of reduction reaction, be conducive to reduce production costs, can effectively remove the impurity in smelting exhaust gas on the other hand, both can improve smelting exhaust gas and pelletizing carried out to the efficiency of preheating, can reduce again the loss of waste gas impurity to equipment, thereby extend the work-ing life of equipment.
Below by specific embodiment, the present invention will be described, it should be noted that these embodiment are only for illustration purpose, and can not be construed to by any way limitation of the present invention.In addition, if not otherwise specified, the equipment adopted and material are commercially available in the following example.
Embodiment 1
To consist of NiO1.4%, Fe
2O
365.2%, SiO
216.5%, Al
2O
34.2%, CaO2.2%, MgO3.3%, Cr
2O
32% and H
2The limonite type laterite of O5.5% and fixed carbon content are that 60% brown coal and water are made pelletizing with the ratio of 100:3:5, and in conveyor dryer, carry out drying under 300 degree celsius temperature conditions.By coal oven dithio-gas and dried pelletizing with 700m
3/ t pelletizing supplies in reduction shaft furnace, carries out reduction reaction under reduction heat equilibrium temperature 1000 degrees celsius.
Through check, products obtained therefrom Ni metal transformation efficiency is 85%, Fe degree of metalization 80%.
Embodiment 2:
To consist of NiO1.4%, Fe
2O
365.2%, SiO
216.5%, Al
2O
34.2%, CaO2.2%, MgO3.3%, Cr
2O
32% and H
2Brown coal and the water of the limonite type laterite of O5.5% and binding agent and fixed carbon content 60% are made pelletizing with the ratio of 100:3:1.5:5, and in conveyor dryer, carry out drying under 400 degree celsius temperature conditions.By coal oven dithio-gas and dried pelletizing with 700m
3/ t pelletizing supplies in reduction shaft furnace, carries out reduction reaction under reduction heat equilibrium temperature 1000 degrees celsius.
Through check, products obtained therefrom Ni metal transformation efficiency is 87%, Fe degree of metalization 82%.
Embodiment 3:
To consist of Ni2%, Fe14%, SiO
248.5%, Al
2O
31.5%, CaO0.8%, MgO25%, Cr
2O
31% and H
2The peat type laterite of O5.2% and the brown coal of fixed carbon content 60% and adjusting agent and water are made pelletizing with the ratio of 100:2:5:5, and in conveyor dryer, carry out drying under 400 degree celsius temperature conditions.By coal oven dithio-gas and dried pelletizing with 500m
3/ t pelletizing supplies in reduction shaft furnace, carries out reduction reaction under reduction heat equilibrium temperature 1100 degrees celsius.
Through check, products obtained therefrom Ni metal transformation efficiency is 90%, Fe degree of metalization 80%.
Embodiment 4:
To consist of Ni2%, Fe14%, SiO
248.5%, Al
2O
31.5%, CaO0.8%, MgO25%, Cr
2O
31% and H
2The peat type laterite of O5.2% and the brown coal of fixed carbon content 60% and adjusting agent and water are made pelletizing with the ratio of 100:3:8:5, and in conveyor dryer, carry out drying under 400 degree celsius temperature conditions.By coal oven dithio-gas and dried pelletizing with 500m
3/ t pelletizing supplies in reduction shaft furnace, carries out reduction reaction under reduction heat equilibrium temperature 1100 degrees celsius.
Through check, products obtained therefrom Ni metal transformation efficiency is 93%, Fe degree of metalization 85%.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art is not in the situation that break away from principle of the present invention and aim can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (12)
1. a smelting laterite-nickel ores method, is characterized in that, described method comprises:
By red soil nickel ore, binding agent, go back raw coal and adjusting agent is made pelletizing, in order to obtain the red soil nickel ore pelletizing;
Described red soil nickel ore pelletizing is joined in reducing apparatus; And
In described reducing apparatus, introduce coal oven dithio-gas as reductive agent, and carry out reduction reaction under 900 degrees centigrade～1300 degrees centigrade, in order to obtain Rhometal and smelting exhaust gas.
2. method according to claim 1, it is characterized in that, based on the total mass of described pelletizing, the content of described adjusting agent is 5 mass parts～20 mass parts, the content of described red soil nickel ore is 75 mass parts～93 mass parts, and the content of described binding agent is 2 mass parts～5 mass parts.
3. method according to claim 1, is characterized in that, described adjusting agent is be selected from lime, Wingdale, sodium carbonate and calcium carbonate at least a.
4. method according to claim 1, is characterized in that, described binding agent is for being selected from Attapulgite, clay and kaolinic at least a.
5. method according to claim 1, is characterized in that, described reducing apparatus be selected from vertical reduction furnace and fluidized-bed one of at least.
6. method according to claim 1, is characterized in that, the temperature of described coal oven dithio-gas is 800 degrees centigrade～850 degrees centigrade.
7. method according to claim 1, is characterized in that, described coal oven dithio-gas is the coal oven dithio-gas produced by coking.
8. method according to claim 1, is characterized in that, the form with the mixture of coal oven dithio-gas and shielding gas, be incorporated into described coal oven dithio-gas in described reducing apparatus, and wherein, described shielding gas is be selected from nitrogen and argon gas at least a.
9. method according to claim 1, it is characterized in that, in described coal oven dithio-gas is incorporated into to described reducing apparatus before, utilize described smelting exhaust gas to carry out preheating to described pelletizing, and to the processing of reforming of described coal oven dithio-gas, in order to obtain the reformation coke-oven gas.
10. method according to claim 9, is characterized in that, utilizing before described smelting exhaust gas carries out preheating to described pelletizing, described smelting exhaust gas carried out to dust removal process.
11. method according to claim 1, is characterized in that, the diameter of described pelletizing is 10 millimeters～20 millimeters.
12. method according to claim 1, is characterized in that, the described raw coal of going back is be selected from coking coal, hard coal and bituminous coal at least a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102879199A CN103409629A (en) | 2013-07-10 | 2013-07-10 | Laterite gas base reduction method |
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|---|---|---|---|
| CN2013102879199A CN103409629A (en) | 2013-07-10 | 2013-07-10 | Laterite gas base reduction method |
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Family
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531933A (en) * | 2014-12-26 | 2015-04-22 | 北京神雾环境能源科技集团股份有限公司 | Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control |
| CN105838874A (en) * | 2016-05-19 | 2016-08-10 | 江苏省冶金设计院有限公司 | Method for preparing laterite-nickel ore pellets for shaft furnace |
| CN107287415A (en) * | 2017-06-20 | 2017-10-24 | 中南大学 | Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application |
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| CN102605132A (en) * | 2012-01-13 | 2012-07-25 | 中冶赛迪工程技术股份有限公司 | Method for producing direct reduction iron by aid of coke oven gas |
| CN102758085A (en) * | 2012-07-17 | 2012-10-31 | 中国钢研科技集团有限公司 | Method for producing nickel-iron alloy by smelting red earth nickel mineral at low temperature |
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| CN102605132A (en) * | 2012-01-13 | 2012-07-25 | 中冶赛迪工程技术股份有限公司 | Method for producing direct reduction iron by aid of coke oven gas |
| CN102758085A (en) * | 2012-07-17 | 2012-10-31 | 中国钢研科技集团有限公司 | Method for producing nickel-iron alloy by smelting red earth nickel mineral at low temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531933A (en) * | 2014-12-26 | 2015-04-22 | 北京神雾环境能源科技集团股份有限公司 | Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control |
| CN104531933B (en) * | 2014-12-26 | 2017-01-18 | 北京神雾环境能源科技集团股份有限公司 | Method for producing high-quality nickel-iron alloy by reducing laterite-nickel ore under control |
| CN105838874A (en) * | 2016-05-19 | 2016-08-10 | 江苏省冶金设计院有限公司 | Method for preparing laterite-nickel ore pellets for shaft furnace |
| CN107287415A (en) * | 2017-06-20 | 2017-10-24 | 中南大学 | Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application |
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Application publication date: 20131127 |