CN104726711A - Technique for coproducing nickel pig iron and rock wool product from lateritic nickel ores - Google Patents
Technique for coproducing nickel pig iron and rock wool product from lateritic nickel ores Download PDFInfo
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- CN104726711A CN104726711A CN201510119518.1A CN201510119518A CN104726711A CN 104726711 A CN104726711 A CN 104726711A CN 201510119518 A CN201510119518 A CN 201510119518A CN 104726711 A CN104726711 A CN 104726711A
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- Prior art keywords
- cotton
- pig iron
- rock wool
- technique
- red soil
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/005—Manufacture of flakes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
- C21B11/10—Making pig-iron other than in blast furnaces in electric furnaces
Abstract
The invention relates to a technique for coproducing nickel pig iron and a rock wool product from lateritic nickel ores, which comprises the following steps: by using the lateritic nickel ores as the main raw material, smelting in a submerged arc furnace to obtain nickel pig iron and a hot melt; screening out the hot melt of which the temperature is 1450-1580 DEG C and the acidity coefficient is 1.6-1.9; injecting the screened hot melt into a holding furnace or injecting into a holding tank and transporting into the holding furnace, and keeping the temperature in the holding furnace at 1400-1500 DEG C; and guiding the hot melt in the holding furnace into a four-roll centrifugal machine through a controllable flow port and a diversion trench, and carrying out a rock wool product production technique to obtain the rock wool product. The preparation technique implements coproduction of the nickel pig iron and rock wool product, and greatly lowers the energy consumption of nickel pig iron smelting; the energy consumption in the rock wool product production process is only 1/4 of that of the traditional rock wool product production technique; and the technique does not discharge waste gas and greatly lowers the production cost of the rock wool product.
Description
Technical field
The invention belongs to field of inorganic materials, particularly a kind of technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product.
Background technology
Traditional rock wool is take coke as main fuel, with basalt etc. for main raw material, conventional cupola melting melt, after high-temperature fusion, is prepared from by centrifuge instrument.For reducing the viscosity of melt, a certain amount of rhombspar of normal admixture and block blast furnace cooling slag in batching, in fusion process, for reducing the consumption of coke, also need to adopt the means such as heating air-supply, oxygen-enriched blasting.But the ores such as basalt limit by the place of production, long-distance transportation can increase cost, can not general development rock wool industry.
Red soil nickel ore adopts mineral hot furnace to produce the nickel pig iron, with addition of a certain amount of coke, nickel wherein and iron at high temperature need be reduced and form the nickel pig iron, and all the other materials are separated with the nickel pig iron and form high-temperature fusant and discharge with the form of slag.As waste discharge after slag employing Forced water cooling.Adopt red soil nickel ore often to produce one ton of nickel pig iron, the waste residue of 6-8 ton need be discharged, thus take a large amount of valuable arable land.How to utilize red soil nickel ore to produce the slag produced, making it turn waste into wealth, is the significant problem that industrial circle faces; And the slag produced while prior art does not openly prepare the nickel pig iron is for the preparation of the report of rock wool; Further, because the original composition of nickel minerals is different, the slag phase structure of employing is also different, causes the composition transfer of slag comparatively large, does not also reach the requirement of producing composition required for rock wool.
Summary of the invention
In order to solve the problems of the technologies described above, make full use of red soil nickel ore, the requirement of producing composition needed for rock wool can be reached, the invention provides a kind of technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product.
The concrete technical scheme of the present invention is as follows:
The invention provides a kind of technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product, this technique comprises the steps:
A. take red soil nickel ore as main raw material, through mineral hot furnace melting, the obtained nickel pig iron and hot melts;
B. filtering out temperature is 1450-1580 DEG C, and acidity quotient is the hot melts of 1.6-1.9;
C. the hot melts filtered out by step b injects in holding furnace or injects in heat insulation tank and injects in holding furnace through roping, and the temperature in holding furnace keeps 1400-1500 DEG C;
D. by controlled head piece and diversion trench, the hot melts in holding furnace is guided in four roller whizzers, through asbestos product production technique, obtained asbestos product.
In above-mentioned preparation technology, mineral hot furnace fusion process also adds auxiliary material, this auxiliary material comprise in unslaked lime, Wingdale or coke one or more; Wherein, the ratio of weight and number of main raw material and auxiliary material is:
Preferably, auxiliary material is the mixture of unslaked lime and coke, and wherein the ratio of weight and number of main raw material and auxiliary material is:
Red soil nickel ore 93
Unslaked lime 2
Coke 5.
The present invention passes through the adjustment to main raw material and auxiliary material in mineral hot furnace production process, adopt special slag phase structure, meet asbestos product to produce the acidity requirements required for melt, adjust slag temperature simultaneously, make it reach requirement to melt viscosity in asbestos product production process.
Due in the process preparing asbestos product, have employed special slag phase structure, the consumption of auxiliary material used in ferronickel production process is reduced greatly meeting under melt condition needed for asbestos product, and fusing institute consuming electric power reduces significantly.
Simultaneously, adopt red soil nickel ore through the mineral hot furnace coproduction nickel pig iron and asbestos product hot melts, non-exhaust emission in asbestos product production process, required energy consumption is only traditional asbestos product and produces consume energy needed for subsequent technique 1/4, and the production cost of asbestos product reduces greatly.
Further improvement, red soil nickel ore is red soil nickel ore calcining or red soil nickel ore agglomerate.
Preferably, in technique described in step b, filtering out temperature is 1500-1550 DEG C, and acidity quotient is the hot melts of 1.8.The asbestos product that the hot melts filtered out further obtains has extraordinary snappiness and intensity.
Remain at 1400-1500 DEG C in order to ensure the temperature in holding furnace, meet the viscous modulus required for asbestos product fibroblast, in roping heat insulation tank and holding furnace, be also marked with heat preserving agent.
On the other hand, the asbestos product that the invention provides provides is rock cotton board, and the production technique of this rock cotton board comprises the steps:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of 1-6 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, binding agent is uniformly applied to rock wool fibers surface, and under the effect of cotton collecting machine, form just cotton layer;
Pendulum step: described just cotton layer is delivered in transfer roller under the effect of pendulum bob machine, form the even cotton felt of multilayer folding structure under the effect of transfer roller;
Pleating step: by described cotton felt under the effect of pressurization pleating machine, the uniform structure of preparation Fiber Distribution is cotton;
Solidification and forming step: structure cotton is sent into curing oven pressurization sizing, advertise 235 DEG C of hot blasts simultaneously, make described adhesive cures, and form the cotton plate that thickness is 40-200mm, by cotton plate cooling out in curing oven, shear and the obtained rock cotton board of packaging.
Further, this asbestos product is granulated wool, and this granulated wool production technique comprises the steps:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of about 5 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, binding agent is uniformly applied to rock wool fibers surface, and form cotton layer under the effect of cotton collecting machine;
Separate cotton step: described cotton layer is broken into material group under the effect of separating cotton machine; Picked up by aspiration channel after material group after fragmentation is removed the gred by selection by winnowing, enter cyclone cylinder and be separated;
Granulation step: after material group is separated, enter tablets press, tears material group further, and makes break of CFRP become the staple fibre of length average out to about 2cm;
Balling-up slug removing step: staple fibre feeding slag ball roto-sifter; Through the rotary rolling effect of sieve, make fiber become spherical material group and the granulated wool of about 5 ~ 20, some slag ball is separated by sieve aperture simultaneously; And mixed glomerate granulated wool exports from the other end of roto-sifter;
Packaging step: granulated wool is sent into feed bin, weighs, and enters extrusion cabin, shaping rear obtained granulated wool.
The technique of the employing red soil nickel ore coproduction nickel pig iron provided by the present invention and asbestos product, the nickel pig iron produced by nickel minerals and asbestos product realizes coproduction, owing to have employed special stock and adjunct, obtain special slag phase structure, while significantly reducing nickel pig iron smelting energy consumption, the production process energy consumption of asbestos product is only 1/4 of traditional asbestos product energy consumption in production process, and without exhaust gas emissions such as sulfurous gas, the production cost of asbestos product reduces greatly simultaneously; The asbestos product adopting main raw material of the present invention and auxiliary material to prepare has good stability, compressive strength and tensile strength, and the equal conformance with standard of the indices of asbestos product.
Embodiment
Embodiment 1
Adopt a technique for the red soil nickel ore coproduction nickel pig iron and asbestos product, this asbestos product is rock cotton board, and technique comprises the steps:
A. with red soil nickel ore calcining for main raw material, add the mixture of unslaked lime and Wingdale before sintering, coke is added before mineral hot furnace, through mineral hot furnace melting, the ratio of weight and number of red soil nickel ore, unslaked lime, Wingdale and coke is 90: 5: 10: 5, the obtained nickel pig iron 60 tons, produces hot melts 330 tons simultaneously;
B. filtering out temperature is 1550 DEG C, and acidity quotient is the hot melts of 1.7, about 130 tons;
C. the hot melts filtered out by step b injects in heat insulation tank and injects in holding furnace through roping, and the temperature in holding furnace keeps 1500 DEG C;
D. by controlled head piece and diversion trench, the hot melts in holding furnace is guided in four roller whizzers, through following rock cotton board production technique, the obtained rock cotton board meeting GB:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of about 5 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, dust laying oil is uniformly applied to rock wool fibers surface, and under the effect of cotton collecting machine, form just cotton layer;
Pendulum step: described just cotton layer is delivered in transfer roller under the effect of pendulum bob machine, form the even cotton felt of multilayer folding structure under the effect of transfer roller;
Pleating step: by described cotton felt under the effect of pressurization pleating machine, the uniform structure of preparation Fiber Distribution is cotton;
Solidification and forming step: structure cotton is sent into curing oven pressurization sizing, advertise 235 DEG C of hot blasts simultaneously, make described adhesive cures, by cotton plate cooling out in curing oven, shear and the obtained rock cotton board goods of packaging.
Embodiment 2
Adopt a technique for the red soil nickel ore coproduction nickel pig iron and asbestos product, this asbestos product is granulated wool, and technique comprises the steps:
A. with red soil nickel ore agglomerate for main raw material, add unslaked lime before sintering, before mineral hot furnace, add coke, through mineral hot furnace melting, the ratio of weight and number of red soil nickel ore, unslaked lime and coke is 93: 2: 5, and the obtained nickel pig iron 100 tons, produces hot melts 600 tons simultaneously;
B. filtering out temperature is 1530 DEG C, and acidity quotient is the hot melts of 1.7, about 310 tons;
C. the hot melts filtered out by step b injects in heat insulation tank and injects in holding furnace through roping, and the temperature in holding furnace keeps 1450 DEG C, is all marked with heat preserving agent in heat insulation tank and holding furnace;
D. by controlled head piece and diversion trench, the hot melts in holding furnace is guided in four roller whizzers, through following granulated wool production technique, the obtained granulated wool meeting Standard:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of about 5 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, binding agent is uniformly applied to rock wool fibers surface, and form cotton layer under the effect of cotton collecting machine;
Separate cotton step: described cotton layer is broken into material group under the effect of separating cotton machine; Picked up by aspiration channel after material group after fragmentation is removed the gred by selection by winnowing, enter cyclone cylinder and be separated;
Granulation step: after material group is separated, enter tablets press, tears material group further, and makes break of CFRP become the staple fibre of length average out to about 2cm;
Balling-up slug removing step: staple fibre feeding slag ball roto-sifter; Through the rotary rolling effect of sieve, make fiber become spherical material group and the granulated wool of about 5 ~ 20, some slag ball is separated by sieve aperture simultaneously.And mixed glomerate granulated wool exports from the other end of roto-sifter;
Packaging step: granulated wool is sent into feed bin, weighs, and enters extrusion cabin, shaping rear obtained granulated wool.
The detection of test example 1 asbestos product indices
Test to the indices of asbestos product provided by the invention, test rating is with reference to the requirement in GB/T25975-2010 external wall Surgery therapy asbestos product, and assay is in table 1;
Table 1 asbestos product indices detected result
Can find out from above table, the equal conformance with standard of asbestos product indices prepared by the present invention, and there is good stability, compressive strength and tensile strength, be applicable to goods such as preparation rock cotton board, rock wool belt etc.
It should be noted that; above-described embodiment is only and citing of the present invention is clearly described; but not the restriction to embodiment; for the technician in smelting laterite-nickel ores field; can make other multi-form variations on the basis of the above description, the apparent change of amplifying therefrom or variation are still in scope.
Claims (8)
1. adopt a technique for the red soil nickel ore coproduction nickel pig iron and asbestos product, it is characterized in that, described technique comprises the steps:
A. take red soil nickel ore as main raw material, through mineral hot furnace melting, the obtained nickel pig iron and hot melts;
B. filtering out temperature is 1450-1580 DEG C, and acidity quotient is the hot melts of 1.6-1.9;
C. the hot melts filtered out by step b injects in holding furnace or injects in heat insulation tank and injects in holding furnace through roping, and the temperature in holding furnace keeps 1400-1500 DEG C;
D. by controlled head piece and diversion trench, the hot melts in holding furnace is guided in four roller whizzers, through asbestos product production technique, obtained asbestos product.
2. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, it is characterized in that, described mineral hot furnace fusion process also adds auxiliary material; Described auxiliary material comprise in unslaked lime, Wingdale or coke one or more; The ratio of weight and number of described main raw material and auxiliary material is:
3. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 2, it is characterized in that, described auxiliary material is the mixture of unslaked lime and coke, and the ratio of weight and number of described main raw material and auxiliary material is:
Red soil nickel ore 93
Unslaked lime 2
Coke 5.
4. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, it is characterized in that, described red soil nickel ore is red soil nickel ore calcining or red soil nickel ore agglomerate.
5. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, it is characterized in that, filtering out temperature is 1500-1550 DEG C, and acidity quotient is the hot melts of 1.8.
6. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, is characterized in that, be also marked with heat preserving agent in described roping heat insulation tank and holding furnace.
7. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, it is characterized in that, described asbestos product is rock cotton board, and the production technique of described rock cotton board comprises the steps:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of 1-6 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, binding agent is uniformly applied to rock wool fibers surface, and under the effect of cotton collecting machine, form just cotton layer;
Pendulum step: described just cotton layer is delivered in transfer roller under the effect of pendulum bob machine, form the even cotton felt of multilayer folding structure under the effect of transfer roller;
Pleating step: by described cotton felt under the effect of pressurization pleating machine, the uniform structure of preparation Fiber Distribution is cotton;
Solidification and forming step: structure cotton is sent into curing oven pressurization sizing, advertise 235 DEG C of hot blasts simultaneously, make described adhesive cures, and form the cotton plate that thickness is 40-200mm, by cotton plate cooling out in curing oven, shear and the obtained rock cotton board of packaging.
8. the technique adopting the red soil nickel ore coproduction nickel pig iron and asbestos product as claimed in claim 1, it is characterized in that, described asbestos product is granulated wool, and described granulated wool production technique comprises the steps:
Forming step: the hot melts in holding furnace is guided in four roller whizzers by controlled head piece and diversion trench, under the effect of whizzer, drawing-off becomes diameter to be the rock wool fibers of about 5 μm;
Collect cotton step: rock wool fibers is blown into cotton collecting machine, binding agent is uniformly applied to rock wool fibers surface, and form cotton layer under the effect of cotton collecting machine;
Separate cotton step: described cotton layer is broken into material group under the effect of separating cotton machine; Picked up by aspiration channel after material group after fragmentation is removed the gred by selection by winnowing, enter cyclone cylinder and be separated;
Granulation step: after material group is separated, enter tablets press, tears material group further, and makes break of CFRP become the staple fibre of length average out to about 2cm;
Balling-up slug removing step: staple fibre feeding slag ball roto-sifter; Through the rotary rolling effect of sieve, make fiber become spherical material group and the granulated wool of about 5 ~ 20, some slag ball is separated by sieve aperture simultaneously; And mixed glomerate granulated wool exports from the other end of roto-sifter;
Packaging step: granulated wool is sent into feed bin, weighs, and enters extrusion cabin, shaping rear obtained granulated wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119518.1A CN104726711A (en) | 2014-06-03 | 2015-03-19 | Technique for coproducing nickel pig iron and rock wool product from lateritic nickel ores |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014102409821 | 2014-06-03 | ||
| CN201410240982.1A CN104004873A (en) | 2014-06-03 | 2014-06-03 | Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore |
| CN201510119518.1A CN104726711A (en) | 2014-06-03 | 2015-03-19 | Technique for coproducing nickel pig iron and rock wool product from lateritic nickel ores |
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| CN104726711A true CN104726711A (en) | 2015-06-24 |
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| CN201410240982.1A Pending CN104004873A (en) | 2014-06-03 | 2014-06-03 | Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore |
| CN201510119518.1A Pending CN104726711A (en) | 2014-06-03 | 2015-03-19 | Technique for coproducing nickel pig iron and rock wool product from lateritic nickel ores |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108975717A (en) * | 2018-07-27 | 2018-12-11 | 湖南金业环保科技有限公司 | Nickel fibers clinker reuse method |
| CN109896747A (en) * | 2019-04-17 | 2019-06-18 | 山东大学 | A kind of method that one-step method makes ore-rock cotton using lateritic nickel ore high temperature hot melt waste residue |
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| CN104004873A (en) * | 2014-06-03 | 2014-08-27 | 山东炜烨节能新材料有限公司 | Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore |
| CN104803595A (en) * | 2015-04-15 | 2015-07-29 | 张成福 | Production method of rock wool |
| CN106316094B (en) * | 2016-08-17 | 2019-06-04 | 北京金隅节能保温科技(大厂)有限公司 | A kind of fire resisting rock wool board and preparation method thereof |
| CN106810063A (en) * | 2017-01-10 | 2017-06-09 | 江苏省冶金设计院有限公司 | A kind of method and system for producing mineral fibres as raw material with metallurgical slag |
| CN106835354B (en) * | 2017-01-24 | 2019-12-17 | 浙江伯益环境科技有限公司 | Method for preparing superfine fibers by using tailing sand of rare precious metal and tantalum-niobium leaching smelting slag |
| CN107021641B (en) * | 2017-04-20 | 2020-02-18 | 中冶东方工程技术有限公司 | Method for producing mineral wool from manganese-silicon alloy slag |
| CN107311460A (en) * | 2017-07-12 | 2017-11-03 | 青岛青力环保设备有限公司 | A kind of technique for handling the ferroalloy industry industrial residue |
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| CN108950215A (en) * | 2018-07-27 | 2018-12-07 | 湖南金业环保科技有限公司 | Low-grade nickle contained discarded material processing method |
| CN110407476B (en) * | 2019-07-05 | 2023-05-23 | 青岛青力环保设备有限公司 | Rock/mineral wool product and preparation method thereof |
| CN112047619A (en) * | 2020-08-01 | 2020-12-08 | 河南富源岩棉有限公司 | Rock wool board production line |
| CN113185260A (en) * | 2021-04-16 | 2021-07-30 | 宁夏领航保温材料有限公司 | Durable environment-friendly insulation pipe material and production process |
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| CN109896747A (en) * | 2019-04-17 | 2019-06-18 | 山东大学 | A kind of method that one-step method makes ore-rock cotton using lateritic nickel ore high temperature hot melt waste residue |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015184695A1 (en) | 2015-12-10 |
| CN104004873A (en) | 2014-08-27 |
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Application publication date: 20150624 |