CN110373935B - Preparation method of nickel iron slag inorganic fiber paper pulp - Google Patents
Preparation method of nickel iron slag inorganic fiber paper pulp Download PDFInfo
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- CN110373935B CN110373935B CN201910607717.5A CN201910607717A CN110373935B CN 110373935 B CN110373935 B CN 110373935B CN 201910607717 A CN201910607717 A CN 201910607717A CN 110373935 B CN110373935 B CN 110373935B
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- inorganic fiber
- slag
- ferronickel slag
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
Abstract
The invention provides a preparation method of ferronickel slag inorganic fiber paper pulp, which comprises the following steps: 1. mixing the ferronickel slag slurry with lime, lead oxide and zinc oxide through transmission equipment; 2. calcining the uniformly mixed raw materials in a high-temperature electric melting furnace at high temperature to prepare slurry; 3. adding aluminum silicate into the liquid slurry prepared by calcination, timely pulling out the liquid slurry when the liquid slurry becomes flocculent cotton, and collecting the ferronickel slag inorganic fiber through a cotton collecting machine; 4. cutting the prepared ferronickel slag inorganic fiber, removing slag through a sand settling tank, and adding a softener, paper pulp fiber, a thickening agent, a modifier, a modified thickening agent, a binder and water for pulping; 5. and raising the temperature of the solution, continuously stirring, further removing slag through a desander, and cooling to room temperature to obtain the uniform ferronickel slag inorganic fiber paper pulp. The ferronickel slag inorganic fiber paper pulp obtained by the method has the advantages of superfine property, super-soft property and toughness.
Description
Technical Field
The invention relates to the field of paper pulp and a manufacturing method thereof, in particular to a manufacturing method of ferronickel slag inorganic fiber paper pulp.
Background
In recent years, the annual discharge amount of nickel-iron slag in China exceeds 3000 million tons, and the nickel-iron slag becomes the fourth most smelting slag after iron slag, steel slag and red mud in China. A large amount of ferronickel slag can only be treated as waste, piled or buried in deep sea, which not only occupies land and pollutes environment, but also brings serious challenge to the sustainable development of ferronickel smelting.
According to the statistics of the Chinese papermaking society, the pulp production amount of China in 2017 is 7949 ten thousand tons, and the same ratio is increased by 0.30%. Wherein, the wood pulp is 1050 ten thousand tons, and the wood pulp is increased by 4.48 percent on the same scale; 6302 ten thousand tons of waste paper pulp, which is reduced by 0.43 percent on the same scale; 597 ten thousand tons of non-wood pulp are increased by 1.02 percent. Although part of newly increased wood pulp capacity is put into production in China, compared with huge market demands, the wood pulp capacity in China still cannot meet the demands and mainly depends on import.
At present, most of domestic nickel-iron slag is generated from humus soil type laterite in the process of reducing and smelting ferronickel in an electric furnace, and the main components of the laterite are FeO, MgO and SiO2The minor component being Al2O3、Cr2O3CaO, and the like, belonging to FeO-MgO-SiO ternary slag system.
The demand of paper products in China is huge, the supply of wood pulp raw materials is far from sufficient, and the production of chemical paper pulp by oneself wastes a large amount of water resources and causes serious environmental pollution. Therefore, the invention provides the ferronickel slag inorganic fiber paper pulp, which finds a new way for comprehensively utilizing the ferronickel slag, reduces the cost of paper products, saves wood, reduces resource waste and protects the environment.
Disclosure of Invention
The invention provides a papermaking method using nickel iron slag inorganic fiber paper pulp as a raw material, and aims to solve the problem of shortage of traditional papermaking raw materials.
In order to achieve the purpose, the technical scheme of the invention is as follows:
s1, preparing ferronickel slag inorganic fiber, wherein the preparation process comprises the following steps:
s11, mixing the ferronickel slag slurry with lime, lead oxide and zinc oxide;
s12, calcining the slag slurry mixed in the S11 at high temperature to prepare slurry;
s13, adding aluminum silicate into the liquid slurry prepared by calcination, drawing out the liquid slurry when the liquid slurry becomes flocculent cotton, and collecting ferronickel slag inorganic fibers;
s2, preparing the ferronickel slag inorganic fiber paper pulp, wherein the preparation process comprises the following steps:
chopping the ferronickel slag inorganic fiber prepared in the step S1, and adding a softener, paper pulp fibers, a thickener, a modifier, a modified thickener, a binder and water for pulping;
and S3, raising the temperature of the slurry prepared in the S2, continuously stirring, further removing slag, and cooling to room temperature to obtain the nickel-iron slag inorganic fiber paper pulp.
80-85 wt% of the ferronickel slag slurry, 10-15 wt% of lime, 0.5-3.5 wt% of lead oxide and 4-7 wt% of zinc oxide in step S11;
the calcination temperature of the high-temperature electric melting furnace in S12 is 1800-2200 ℃, and the time is 30-60 min;
the proportion of the aluminum silicate in the S13 in the mixed slurry is 0.03-0.1 wt%;
the mass ratio of each component in S2 is 1-6% of the softening agent, 0.1-10% of the pulp fiber, 0.05-0.5% of the thickening agent, 0.05-0.2% of the modifying agent, 0.3-1.2% of the modifying thickening agent, 1-4% of the binder and the balance of water;
the solution in the S3 is heated to 80 +/-5 ℃ and stirred for 1-2 h.
Wherein, in the step S1, the diameter of the nickel-iron slag inorganic fiber is 1-3 μm, the length is 3-10cm, in the step S2, the nickel-iron slag inorganic fiber is cut into sections of 3-6mm, the deslagging is to remove the non-melted nickel-iron slag particles in the nickel-iron slag inorganic fiber, and the nickel-iron slag particles are returned to the furnace to be melted and drawn again.
Wherein, the softening agent in step S2 is one or a mixture of several of water-based polyurethane resin, polyvinyl acetate, water-based epoxy resin, melamine solution and polyacrylic acid.
Wherein, the paper pulp fiber in the step S2 is a mixture of plant fiber and nickel-iron slag inorganic fiber, and the mixing mass ratio of the two mixtures is 3-7: 7-3.
Wherein, the binder in step S2 is one or a mixture of several of polyvinyl alcohol, epoxy resin, methacrylate binder, and the like.
Wherein, the thickener in the step S2 is one of cellulose thickener, polyacrylate and associated polyurethane thickener.
Wherein, the modifier in the step S2 is one or a mixture of several of sodium hydroxide, calcium hydroxide and calcium carbonate.
Wherein, the modified thickener in the step S2 is one or a mixture of more of oxidized starch, cationic starch, anionic starch, dialdehyde starch and phosphate starch.
Wherein, the plant fiber in the step S2 is wood fiber, leaf fiber and waste paper.
The invention has the following advantages: the laterite-nickel-iron slag prepared by the method is analyzed completely, and the main chemical component of the laterite-nickel-iron slag is SiO2：52.15％，Al2O3：4.77％，Fe2O3: 5.5%, CaO: 32.71%, MgO: 4.42 percent, and the like, and because of the characteristics of high calcium and low magnesium, the fiber has the advantages of superfine, super-soft and toughness, and can be used for preparing various paper products such as white board paper, printing paper, copy paper and the like, and all indexes can well reach corresponding national standards.
Sensory fiber softness evaluation method: the softness of the fibers contains a number of indicators, the combined effect of which is assessed by hand touch: the touch was repeated 5 times for each fiber sample, and the average was the softness of the sample. The results are shown in four grades 1, 2, 3, 4, with increasing softness, and the "+" and "-" signs of the numeric suffix indicating a lesser or greater strength.
| Ordinary fiber | Nickel iron slag fiber | |
| Grade of hand feel | 1+ | 3 |
At present, no technology for making paper by using nickel-iron slag fibers exists in the market, and the paper product prepared by the method and the paper prepared by the prior art in the market are detected, so that the breaking resistance, the tensile strength and the tearing strength of the paper product produced by the method are improved.
| Plain paper | Ferronickel slag fiber paper | |
| Burst (KPa) | 182.7 | 196.5 |
| Tensile Strength (N/M) | 2167.8 | 2985.9 |
| Tearing strength of 4 sheets (mN) | 2494.4 | 2576.0 |
The invention adopts the electric melting furnace to produce the ferronickel inorganic fiber, and compared with the prior art, the invention does not need to burn coal, thereby saving energy and effectively solving the problem of environmental pollution. The method is suitable for industrial large-scale production, has no pollutant discharge in the whole process of slurry manufacture, reduces the papermaking cost and has obvious significance for protecting forest resources.
Detailed Description
Example 1
1. Preparation of ferronickel slag inorganic fiber
Uniformly mixing 80 wt% of nickel-iron slag, 10 wt% of lime, 1.5 wt% of lead oxide, 6 wt% of zinc oxide and the like according to a proportion, conveying the mixture to a high-temperature electric melting furnace, heating to 1800 ℃, and calcining at high temperature for 60min to prepare slurry. The calcined slurry flows to a variable-frequency high-speed centrifugal wire drawing machine through the bottom of the electric melting furnace, 0.05 wt% of aluminum silicate is added to timely pull out the slurry when the slurry becomes flocculent cotton, and the nickel iron slag inorganic fiber is collected through a cotton collecting machine.
2. Preparation of ferronickel slag inorganic fiber paper pulp
Cutting the ferronickel slag inorganic fibers into sections of 3mm, removing slag through a sand settling tank, removing unfused ferronickel slag particles in the ferronickel slag inorganic fibers, directly returning the ferronickel slag particles to the furnace, and remelting and drawing the wire. And preparing the slurry according to the following mass ratio:
2% of aqueous polyurethane resin, 3% of waste paper, 7% of ferronickel slag inorganic fiber, 0.2% of hydroxyethyl cellulose, 0.05% of sodium hydroxide, 0.5% of cationic starch, 3% of epoxy resin and the balance of water. And continuously stirring the solution at 80 +/-5 ℃ for 2 hours, further removing slag by a desander, and cooling to room temperature to obtain uniform ferronickel slag inorganic fiber paper pulp.
The diameter of the prepared nickel iron slag fiber is 2-3 mu m, the length is 3-10cm, and the prepared nickel iron slag fiber belongs to fine fiber.
3. Preparation of paper products
And conveying the ferronickel slag inorganic fiber paper pulp to a paper machine, and drying a semi-finished product prepared after paper making to prepare a paper product.
Example 2
1. Preparation of ferronickel slag inorganic fiber
Uniformly mixing 80 wt% of nickel-iron slag, 12 wt% of lime, 1 wt% of lead oxide, 5 wt% of zinc oxide and the like in proportion, conveying the mixture to a high-temperature electric melting furnace, heating the mixture to 2000 ℃, and calcining the mixture at high temperature for 50min to prepare slurry. The calcined slurry flows to a variable-frequency high-speed centrifugal wire drawing machine through the bottom of the electric melting furnace, 0.05 wt% of aluminum silicate is added to timely pull out the slurry when the slurry becomes flocculent cotton, and the nickel iron slag inorganic fiber is collected through a cotton collecting machine.
2. Preparation of ferronickel slag inorganic fiber paper pulp
Cutting the ferronickel slag inorganic fibers into sections of 3mm, removing slag through a sand settling tank, removing unfused ferronickel slag particles in the ferronickel slag inorganic fibers, directly returning the ferronickel slag particles to the furnace, and remelting and drawing the wire. And preparing the slurry according to the following mass ratio:
4% of polyvinyl acetate, 5% of wood fiber, 5% of ferronickel slag inorganic fiber, 0.2% of polyacrylate, 0.05% of calcium hydroxide, 0.5% of oxidized starch, 2% of polyvinyl alcohol and the balance of water. And continuously stirring the solution for 1.5h at the temperature of 80 +/-5 ℃, further removing slag through a desander, and cooling to room temperature to obtain uniform ferronickel slag inorganic fiber paper pulp.
The diameter of the prepared nickel iron slag fiber is 2-3 mu m, the length is 3-10cm, and the prepared nickel iron slag fiber belongs to fine fiber.
3. Preparation of paper products
And conveying the ferronickel slag inorganic fiber paper pulp to a paper machine, and drying a semi-finished product prepared after paper making to prepare a paper product.
Example 3
1. Preparation of ferronickel slag inorganic fiber
Uniformly mixing 80 wt% of nickel-iron slag, 12 wt% of lime, 0.5 wt% of lead oxide, 7 wt% of zinc oxide and the like according to a proportion, conveying the mixture to a high-temperature electric melting furnace, heating the mixture to 2200 ℃, and calcining the mixture at high temperature for 30min to prepare slurry. The calcined slurry flows to a variable-frequency high-speed centrifugal wire drawing machine through the bottom of the electric melting furnace, 0.05 wt% of aluminum silicate is added to timely pull out the slurry when the slurry becomes flocculent cotton, and the nickel iron slag inorganic fiber is collected through a cotton collecting machine.
2. Preparation of ferronickel slag inorganic fiber paper pulp
Cutting the ferronickel slag inorganic fibers into sections of 3mm, removing slag through a sand settling tank, removing unfused ferronickel slag particles in the ferronickel slag inorganic fibers, directly returning the ferronickel slag particles to the furnace, and remelting and drawing the wire. And preparing the slurry according to the following mass ratio:
6% of melamine liquid, 6% of leaf fiber, 4% of ferronickel slag inorganic fiber, 0.1% of polyurethane thickener, 0.15% of calcium carbonate, 0.5% of phosphate starch, 1% of methacrylate and the balance of water. And continuously stirring the solution for 1.5h at the temperature of 80 +/-5 ℃, further removing slag through a desander, and cooling to room temperature to obtain uniform ferronickel slag inorganic fiber paper pulp.
The diameter of the prepared nickel iron slag fiber is 2-3 mu m, the length is 3-10cm, and the prepared nickel iron slag fiber belongs to fine fiber.
3. Preparation of paper products
And conveying the ferronickel slag inorganic fiber paper pulp to a paper machine, and drying a semi-finished product prepared after paper making to prepare a paper product.
The fine fibers of the fibers also have great influence on the brittleness of the paper, and the fine fibers of the fibers are beneficial to the dispersion of the stress of the paper, can reduce the brittleness of the paper and improve the toughness.
The ferronickel slag is analyzed completely, and the main chemical component of the ferronickel slag is SiO2：52.15％，Al2O3：4.77％，Fe2O3: 5.5%, CaO: 32.71%, MgO: 4.42 percent, and the prepared laterite-nickel iron slag fiber paper has the characteristics of superfine property, super-soft property and toughness due to the characteristic of high calcium and low magnesium.
The invention adopts the electric melting furnace to produce the ferronickel inorganic fiber, and compared with the prior art, the invention does not need to burn coal, thereby saving energy and effectively solving the problem of environmental pollution. At present, no technology for making paper by using nickel-iron slag fibers exists in the market, and the paper product prepared by the method and the paper prepared by the prior art in the market are detected, so that the breaking resistance, the tensile strength and the tearing strength of the paper product produced by the method are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. A preparation method of ferronickel slag inorganic fiber paper pulp is characterized by comprising the following preparation processes:
s1, preparing ferronickel slag inorganic fiber, wherein the preparation process comprises the following steps:
s11, mixing the ferronickel slag slurry with lime, lead oxide and zinc oxide;
s12, calcining the slag slurry mixed in the S11 at high temperature to prepare slurry;
s13, adding aluminum silicate into the liquid slurry prepared by calcination, drawing out the liquid slurry when the liquid slurry becomes flocculent cotton, and collecting ferronickel slag inorganic fibers;
s2, preparing the ferronickel slag inorganic fiber paper pulp, wherein the preparation process comprises the following steps: chopping the ferronickel slag inorganic fiber prepared in the step S1, and adding a softener, paper pulp fibers, a thickener, a modifier, a modified thickener, a binder and water for pulping;
s3, raising the temperature of the slurry prepared in the S2, continuously stirring, further removing slag, and cooling to room temperature to obtain nickel-iron slag inorganic fiber paper pulp;
wherein the proportion of each component in S11 is 80-85 wt% of the ferronickel slag slurry, 10-15 wt% of the lime, 0.5-3.5 wt% of the lead oxide and 4-7 wt% of the zinc oxide;
the calcination temperature of the high-temperature electric melting furnace in S12 is 1800-2200 ℃, and the time is 30-60 min;
the proportion of the aluminum silicate in the S13 in the mixed slurry is 0.03-0.1 wt%;
the mass ratio of each component in S2 is 1-6% of the softening agent, 0.1-10% of the pulp fiber, 0.05-0.5% of the thickening agent, 0.05-0.2% of the modifying agent, 0.3-1.2% of the modifying thickening agent, 1-4% of the binder and the balance of water;
in the S3, the slurry is heated to 80 +/-5 ℃ and stirred for 1-2 h;
s1, cutting the ferronickel slag inorganic fibers into sections of 3-6mm, wherein the diameter of the ferronickel slag inorganic fibers is 1-3 mu m, the length of the ferronickel slag inorganic fibers is 3-10cm, deslagging is to remove non-melted ferronickel slag particles in the ferronickel slag inorganic fibers, and returning the ferronickel slag particles to a furnace for re-melting and wire drawing.
2. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 1, wherein the softener is one or a mixture of several of water-based polyurethane resin, polyvinyl acetate, water-based epoxy resin, melamine liquid and polyacrylic acid.
3. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 1, wherein the pulp fiber is a mixture of plant fiber and nickel-iron slag inorganic fiber, and the mixing mass ratio of the two mixtures is 3-7: 7-3.
4. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 1, wherein the binder is one or a mixture of polyvinyl alcohol, epoxy resin and methacrylate binder.
5. The method of claim 1, wherein the thickener is one of a cellulose thickener, a polyacrylate, and an associative polyurethane thickener.
6. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 1, wherein the modifier is one or a mixture of sodium hydroxide, calcium hydroxide and calcium carbonate.
7. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 1, wherein the modified thickening agent is one or a mixture of more of oxidized starch, cationic starch, anionic starch and phosphate starch.
8. The method of claim 7, wherein the oxidized starch comprises dialdehyde starch.
9. The method for preparing the nickel-iron slag inorganic fiber pulp according to claim 3, wherein the plant fiber is wood fiber, leaf fiber or waste paper.
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| CN113882178B (en) * | 2021-06-28 | 2024-04-16 | 南京钢铁股份有限公司 | Method for improving thickness of bobbin base paper |
| CN113550169A (en) * | 2021-06-28 | 2021-10-26 | 南京钢铁股份有限公司 | Production method for making paper pulp by using slag mineral wool |
| CN113445353A (en) * | 2021-07-01 | 2021-09-28 | 南京钢铁股份有限公司 | Method for manufacturing low-cost novel environment-friendly paper |
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| CN114214865A (en) * | 2021-10-13 | 2022-03-22 | 南京钢铁股份有限公司 | Production method for proportioning and pulping inorganic cotton raw materials |
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