CN103667689B - A kind of red soil nickel ore pressure ball oxide pelletizing process - Google Patents
A kind of red soil nickel ore pressure ball oxide pelletizing process Download PDFInfo
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- CN103667689B CN103667689B CN201310652952.7A CN201310652952A CN103667689B CN 103667689 B CN103667689 B CN 103667689B CN 201310652952 A CN201310652952 A CN 201310652952A CN 103667689 B CN103667689 B CN 103667689B
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- nickel ore
- ball
- red soil
- pressure ball
- soil nickel
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 57
- 239000002689 soil Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005453 pelletization Methods 0.000 title claims abstract description 15
- 239000008188 pellet Substances 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 13
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- 150000001875 compounds Chemical class 0.000 claims abstract description 12
- 229910001710 laterite Inorganic materials 0.000 claims abstract description 7
- 239000011504 laterite Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910000480 nickel oxide Inorganic materials 0.000 description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical class [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052905 tridymite Inorganic materials 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a kind of low-grade laterite nickel ore pressure ball and produce oxide pelletizing process, comprising: be broken after red soil nickel ore is dried, be broken for the red soil nickel ore powder that particle diameter is less than 3mm; In red soil nickel ore powder, add water and additive, be mixed into compound.Compound pressure ball is become green-ball; Green-ball is carried out oxidizing roasting, then cooling obtains acid pellet; Adopt the technical program, low-grade red soil nickel ore can be utilized to adopt ball press technique to produce the acid pellet meeting shaft furnace production index, not only reduce the oven dry completely and preroasting process that adopt pelletizing technology to produce, reduce thermal energy consumption, and this acid pellet nickel content is high, considerably increases added value.
Description
Technical field
The present invention relates to metallurgical technology field, particularly relate to a kind of red soil nickel ore pressure ball oxide pelletizing process.
Background technology
Lateritic Soil nickel resources enriches, and all there are 4,100 ten thousand tons of nickel amounts of metal in the whole world, and reconnoitre cost low, mining cost is extremely low, can be used to produce ferronickel as general steel raw material or as stainless nickel source.At present, rotary kiln drying prereduction-electric furnace reduction melting, sintering-blast furnace sulfiding smelting and sintering-blast furnace retailoring are the pyrometallurgical smelting methods of common red soil nickel ore, and wherein rotary kiln drying prereduction-electric furnace reduction smelting process is a kind of method that Laterite-nickel Ore smelter generally adopts.
Patent CN201210203499.7 discloses a kind of manufacture method of red soil nickel ore pellet, the method is first by red soil nickel ore roasting at least more than 40min more than 650 DEG C, then fine grinding is less than 200 objects is at least 60%, then obtains finished product through mixing pelletizing, oven dry, roasting.The method is first carried out pre-treatment to red soil nickel ore and is carried out acid pellet again, adds calcining process and fine grinding operation and expense.
Patent CN20110035147.0 discloses a kind of method of producing pellets from laterite-nickel ore, this summary of the invention is the unslaked lime with addition of the wilkinite of massfraction 1 ~ 4% and 1 ~ 8% in raw ore, mixing pelletizing, and screening obtains qualified green-ball, at baking and concretion, after cooling, nickel pellet can be obtained.The production method of this nickel oxide pellet adds the wilkinite of 1 ~ 4%, adds slag system ingredient, and reduce the nickel grade of nickel oxide pellet, added value of product decreases.
Patent CN201110177972.4 discloses a kind of preparation process of low-grade laterite nickel ore oxidized pellet, and this summary of the invention is that red soil nickel ore is coordinated the production technique of producing nickeliferous acid pellet as nickel-containing mineral composition according to a certain percentage with iron ore concentrate and chromite.This preparation technology adopts and joins ore deposit mode, and add the iron ore concentrate of 30-35% and the chromite of 15%, the nickel grade of the laterite nickel ore oxidized pellet of production is low.
Summary of the invention
The basis that the object of the invention is not reduce the grade of nickel minerals own solves in prior art the problem needing preroasting raw material, provides a kind of ball press technique of the acid pellet for direct-reduction production, particularly a kind of red soil nickel ore pressure ball oxide pelletizing process.
The object of the invention is to be achieved through the following technical solutions:
A kind of red soil nickel ore pressure ball oxide pelletizing process, comprising:
Step 1, red soil nickel ore is dried after broken, be broken for the red soil nickel ore powder that particle diameter is less than 3mm;
Step 2, in red soil nickel ore powder, add water and additive, be mixed into compound.
Step 3, compound pressure ball is become green-ball;
Step 4, green-ball is carried out oxidizing roasting, then cooling obtains acid pellet.
Each component content of described red soil nickel ore is: TFe is 13-40Wt%, Ni is 0.8-2Wt%.
Described step 3 adopts the mode of pair roller pressure ball to carry out pressure ball.
In described step 3, pressure ball is spherical is the biconvex ball of diameter 10-20mm, and the line angle at convex surface top to edge is greater than 110 degree.
The dry oxidizing roasting mode of described step 4 green-ball is grate kiln, belt type roasting machine or shaft furnace one wherein.
Additive in described step 2 is calcium additive and sodium matter additive.
Also comprise, by calcium additive, the dual alkalinity of compound is adjusted to 0.5-1.2.
Described sodium matter additive amount is the 2wt%-5wt% of described compound.
Adopt technical scheme of the present invention, low-grade red soil nickel ore can be utilized to adopt ball press technique to produce the acid pellet meeting shaft furnace production index, not only avoid the oven dry completely and preroasting process that adopt pelletizing technology to produce, acid pellet raw meal particle size requires low, decrease thermoelectricity energy consumption, and this acid pellet nickel content does not reduce, nickel oxide pellet added value is increased greatly.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of red soil nickel ore pressure ball acid pellet of the present invention
Fig. 2 is the side-view of green-ball
Fig. 3 is the vertical view of green-ball
Embodiment
For better the present invention being described, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment 1
(1) red soil nickel ore is got, the total water-content 36.6% of this red soil nickel ore, specific chemical composition: TFe:39.4Wt%; FeO:1.44Wt%; Ni:1.23Wt%; CaO:0.35Wt%; MgO:5.34Wt%; SiO2:10.09Wt%; Al2O3:5.60Wt%; S:0.01Wt%, vestige P percentage composition;
(2) this red soil nickel ore is carried out being dried to moisture 15%, and carry out being crushed to below particle diameter 3mm;
(3) sodium sulfate of 2% and the Wingdale of 8% are put into the red soil nickel ore after fragmentation, mix;
(4) mixed material is suppressed balling-up on pair roller ball press, as shown in Figure 3: the green-ball suppressed is the biconvex ball of diameter 10 ~ 20mm, as shown in Figure 2: the angle α of convex surface top and edge line is greater than 110 degree, green-ball moisture 10 ~ 13%;
(5) green-ball is delivered to shaft furnace conveniently technique carry out dry waste heat roasting, obtained finished product acid pellet, more than mean compressive strength 3500N, meets gas-based shaft kiln acid pellet index.
Embodiment 2
(1) red soil nickel ore of total water-content 36% is adopted, specific chemical composition: TFe:20.13Wt%; FeO:1.8Wt%; Ni:1.66Wt%; CaO:0.28Wt%; MgO:9.21Wt%; SiO2:27.07Wt%; Al2O3:3.85Wt%; S:0.006Wt%, vestige P percentage composition;
(2) being carried out by this red soil nickel ore being dried to moisture content is 17%, and carries out being crushed to below particle diameter 3mm;
(3) sodium sulfate of 4wt% and the Wingdale of 20wt% are put into red soil nickel ore to mix;
(4) compound is suppressed balling-up on pair roller ball press, as shown in Figure 3: the biconvex ball of the green-ball of compacting to be diameter be 10 ~ 20mm, as shown in Figure 2: the angle of convex surface top and edge line is greater than 110 degree, green-ball moisture 12 ~ 14%;
(5) green-ball is delivered to shaft furnace to carry out conveniently technique and carry out drying, roasting, obtained finished product acid pellet, more than mean compressive strength 4000N, meets gas-based shaft kiln acid pellet index.
Embodiment 3
(1) red soil nickel ore of total water-content 34% is adopted, specific chemical composition: TFe:13.98Wt%; FeO:1.08Wt%; Ni:1.25Wt%; CaO:0.28Wt%; MgO:18.11%; SiO2:30.08Wt%; Al2O3:1.28Wt%; The percentage composition of S and P is all vestige, tests;
(2) this red soil nickel ore is carried out being dried to moisture 17%, and carry out broken kernel footpath to below 3mm;
(3) sodium sulfate of 3wt% and the Wingdale of 15wt% are mixed with red soil nickel ore;
(4) compound is suppressed balling-up on pair roller ball press, as shown in Figure 3: the green-ball suppressed is the biconvex ball of diameter 10 ~ 20, as shown in Figure 2: the angle α of convex surface top and edge line is greater than 110 degree, green-ball moisture 12 ~ 15%;
(5) green-ball is delivered to shaft furnace conveniently technique carry out drying, roasting, obtained finished product acid pellet, more than ultimate compression strength 4500N, meets gas-based shaft kiln acid pellet index.
This technology can utilize low-grade red soil nickel ore to adopt ball press technique to produce the acid pellet meeting shaft furnace production index, not only reduce the oven dry completely and preroasting process that adopt pelletizing technology to produce, reduce thermal energy consumption, and this acid pellet nickel content is high, and its added value is increased greatly.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (4)
1. low-grade laterite nickel ore pressure ball produces an oxide pelletizing process, it is characterized in that, comprising:
Step 1, red soil nickel ore is dried after broken, be broken for the red soil nickel ore powder that particle diameter is less than 3mm;
Step 2, in red soil nickel ore powder, add water and additive, be mixed into compound;
Step 3, compound pressure ball is become green-ball;
Step 4, green-ball is carried out oxidizing roasting, then cooling obtains acid pellet;
Described step 3 adopts the mode of pair roller pressure ball to carry out pressure ball;
In described step 3, pressure ball is spherical is the biconvex ball of diameter 10-20mm, and the line angle at convex surface top to edge is greater than 110 degree;
Additive in described step 2 is calcium additive and sodium matter additive;
Described sodium matter additive amount is the 2wt%-5wt% of described compound.
2. a kind of low-grade laterite nickel ore pressure ball according to claim 1 produces oxide pelletizing process, and it is characterized in that, in described red soil nickel ore, the content of TFe is the content of 13-40wt%, Ni is 0.8-2wt%.
3. a kind of low-grade laterite nickel ore pressure ball according to claim 1 produces oxide pelletizing process, and it is characterized in that, the dry oxidizing roasting mode of described step 4 green-ball is grate kiln, belt type roasting machine or shaft furnace one wherein.
4. a kind of low-grade laterite nickel ore pressure ball according to claim 1 produces oxide pelletizing process, it is characterized in that, also comprises, by calcium additive, the dual alkalinity of compound is adjusted to 0.5-1.2.
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| CN201310652952.7A CN103667689B (en) | 2013-12-05 | 2013-12-05 | A kind of red soil nickel ore pressure ball oxide pelletizing process |
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| CN104152676B (en) * | 2014-07-25 | 2016-04-06 | 中南大学 | A kind of Iron Ore Matching in Sintering method of red soil nickel ore |
| 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 |
| CN106702149A (en) * | 2016-12-20 | 2017-05-24 | 江苏省冶金设计院有限公司 | System and method for preparing laterite nickel ore oxidized pellets |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102242259A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | Preparation process of low-grade laterite nickel ore oxidized pellet |
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| CN102242259A (en) * | 2011-06-29 | 2011-11-16 | 中南大学 | Preparation process of low-grade laterite nickel ore oxidized pellet |
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