CN108797202A - A method of utilizing ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard - Google Patents
A method of utilizing ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard Download PDFInfo
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- CN108797202A CN108797202A CN201810712226.2A CN201810712226A CN108797202A CN 108797202 A CN108797202 A CN 108797202A CN 201810712226 A CN201810712226 A CN 201810712226A CN 108797202 A CN108797202 A CN 108797202A
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- red mud
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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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/34—Ignifugeants
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/76—Preparation by contact processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/0693—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process from waste-like raw materials, e.g. fly ash or Bayer calcination dust
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
- C01F7/142—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent with carbon dioxide
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/07—Nitrogen-containing compounds
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/65—Acid compounds
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
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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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
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Abstract
The present invention provides a kind of methods using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, include the following steps：Ardealite, red mud, additive and modifying agent are mixed and ground, raw material are made, be sent into roasting in kiln, clinker is made, water mill dissolution is carried out to clinker, and be separated by solid-liquid separation, sulfuric acid is made in isolated solid roasting post-processing, and isolated liquid adds CO2Thick aluminium hydroxide is obtained, thick aluminium hydroxide is processed to obtain aluminium hydroxide, and environmental protection flame retardant cardboard is made with polyphosphoric acid, phosphoric acid, urea, boric acid, gamma-aminopropyl-triethoxy-silane coupling agent, ethyl alcohol, glacial acetic acid and paper pulp again in aluminium hydroxide.The present invention, which has, comprehensively utilizes ardealite and red mud, reduces environmental pollution, utilization rate is high, and product aluminium hydroxide is the good fire retardant raw material for preparing environmental protection flame retardant cardboard, and the environmental protection flame retardant cardboard of coproduction of the present invention has the characteristics that production cost is low.
Description
Technical field
The present invention relates to a kind of methods using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, belong to chemical metallurgy
Field.
Background technology
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that generates, produce 1 ton of phosphoric acid by-product
About 5 tons of ardealite.Currently, it is about hundred million tons of 1.2-1.4 that ardealite total amount is discharged in the whole world every year, China is about 50,000,000 tons of left sides
The right side accounts for the 25-29% of global year discharge ardealite total amount, this quantity is in increase trend, and domestic ardealite heap high-volume reaches at present
2.5 hundred million tons.Major part enterprise handles ardealite stacking at present, and there is many drawbacks for this.Because ardealite removes main ingredient
For CaSO4·2H2Outside O, also containing there are many other impurity.Institute's fluoride, free phosphoric acid, P in ardealite2O5, phosphate and
The impurity such as arsenic, copper, zinc, iron, manganese, lead, cadmium, mercury, this causes ardealite that can cause largely to pollute.
The pollution waste residue that red mud is discharged when being aluminium industry extraction aluminium oxide, average often produces 1 ton of aluminium oxide, attached
Band generates 1.0~2.0 tons of red muds.China is used as the 4th big alumina producing state of the world, the red mud discharged every year up to tens million of
Ton.The red mud of the alumina producer discharge in Guizhou also has certain radioactivity, the stockyard of large area can only be relied on to stack at present.It accounts for
With a large amount of soils, serious pollution also is caused to environment.On the other hand, Bayer process produces aluminium used when aluminium oxide at present
Native mine alumina silica ratio is low, and the remaining Al amounts in corresponding Bayer red mud are also higher and higher, and the remaining utility value of Bayer red mud is also more
It is high.
Fire retardant papers are that have not burn or the general name of a kind of paper of difficult to burn performance.It has higher strength character and excellent
Flame retardant property.The making of fire retardant papers is to be processed to paper pulp using fire retardant, but show currently, being used as fire retardant papers mostly
The aluminium hydroxide price of one of fire retardant primary raw material persistently increases, and the production cost for directly resulting in fire-retardant cardboard high is asked
Topic.
Now currently, ardealite and red mud bulk deposition, pollute environment, be primarily used to build to the utilization of ardealite and red mud
In terms of building material, but this occupation mode is very low to the added value of ardealite and red mud, the acid and red mud carried secretly in ardealite
The alkali of middle entrainment leads to building materials quality decline, and a large amount of valuable constituents in ardealite and red mud also fail to be utilized effectively.Mesh
The technique of preceding comprehensive utilization ardealite and the sour co-production environmental protection flame retardant cardboard of red mud production, has not been reported.
Goal of the invention
The object of the present invention is to provide a kind of methods using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard.This hair
Bright to reduce environmental pollution with ardealite and red mud is comprehensively utilized, utilization rate is high, and product aluminium hydroxide is to prepare environmental protection
The good fire retardant raw material of fire-retardant cardboard, the environmental protection flame retardant cardboard of coproduction of the present invention have the characteristics that production cost is low.
Technical scheme of the present invention
A method of using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, include the following steps：
（1）Ardealite, red mud, additive and modifying agent are mixed and ground, raw material are made, is sent into roasting in kiln, clinker is made,
Water mill dissolution is carried out to clinker, and is separated by solid-liquid separation；
（2）By step（1）The middle obtained precipitation of being separated by solid-liquid separation carries out flotation, isolates sulfide, by the sulfide isolated into
Row roasting, then the flue gas that roasting is generated are absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid are made；
（3）To step（1）CO is added in middle be separated by solid-liquid separation in obtained liquid2It is no longer generated to precipitation, then will be deposited in 100-
It is dried at 120 DEG C, until after moisture is less than 0.5%, obtains thick aluminium hydroxide, be added its 0.1-0.6wt%'s into thick aluminium hydroxide
The dispersant of decolorising agent and 0.05-0.2wt% are ground, and aluminium hydroxide is made；
（4）Polyphosphoric acid, phosphoric acid and urea are mixed, is added in reaction kettle, then adds zinc borate and step（3）It is obtained
Aluminium hydroxide heats, then heat preservation discharges, crushes sieving, adds gamma-aminopropyl-triethoxy-silane coupling agent, second
Alcohol and glacial acetic acid carry out surface modification, obtain composite flame-retardant agent, after mixing with paper pulp by composite flame-retardant agent, copy and shape is made,
Drying is squeezed, environmental-protection flame-retardant cardboard is made.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（1）In, the red mud
The red mud generated for alumina producing Bayer process；The additive is sodium carbonate, sodium sulphate or caustic soda；The modifying agent is smokeless
Coal, carbon or gangue.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（1）In, the raw material
In, ardealite and red mud are according to 1-1.5:The ratio of 1-1.3 weight ratios mixes, and additive adding proportion presses contained Na in raw material2O
And Al2O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are the 12-20% of raw material total weight；Roasting is
The roasting time 0.5-3h at 1050-1400 DEG C of temperature；It is 3-7 that liquid when dissolution, which consolidates volume ratio,:1.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（1）In, the kiln is work
Industry rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（2）In, the roasting
Condition is that sulfide is placed under the oxygen-enriched environment of 40-45%, and 2-5h is roasted at 1000-1200 DEG C.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（3）In, the decolorising agent
For one or more kinds of mixtures in SODIUM PERCARBONATE, sodium perborate or sodium peroxydisulfate；The dispersant is ethyl alcohol or gathers
Ethylene glycol；Using the ball mill of aluminium oxide liner plate, abrasive media is alumina balls, ratio of grinding media to material 6-9 for the grinding：1.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（4）In, by weight
Meter, the environmental-protection flame-retardant cardboard includes 0.5-1 parts of polyphosphoric acid, 0.1-0.5 parts of phosphoric acid, 0.1-0.5 parts of urea, zinc borate 0.5-
2 parts, 2-8 parts of aluminium hydroxide, 0.05-0.1 parts of gamma-aminopropyl-triethoxy-silane coupling agent, 0.03-0.1 parts of ethyl alcohol, glacial acetic acid
0.01-0.05 parts and 60-80 parts of paper pulp.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, by weight, the environmental protection
The fire-retardant cardboard of type includes 0.7 part of polyphosphoric acid, 0.3 part of phosphoric acid, 0.2 part of urea, 0.7 part of zinc borate, 5 parts of aluminium hydroxide, γ-ammonia third
70 parts of 0.08 part of ethyl triethoxy silicane alkane coupling agent, 0.06 part of ethyl alcohol, 0.03 part of glacial acetic acid and paper pulp.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（4）In, it is described to crushed
Sieve was 400 mesh sieve；The temperature of the heating is 170-180 DEG C；The time of the heat preservation is 1-2h；The temperature of the modification is
45-60 DEG C, time 0.5-1.5h.
Method above-mentioned using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, step（4）In, the paper pulp
A concentration of 0.5-2%.
The present invention is by by ardealite and red mud reaction, recombination, making utility.The net reaction of principle is：
CaSO4（Ardealite）+Na2O·SiO2·Al2O3（Red mud）→Na2O·Al2O3+CaO·SiO2↓+[sulphur]
From the reaction equation it is found that with the SiO in the CaO and red mud in ardealite2Generate calcium orthosilicate（CaO·SiO2↓）Afterwards, it obtains
To soluble fabulous sodium aluminate（Na2O·Al2O3）.[sulphur] in reaction equation refers to adding modifying agent technique by raw material, is generated
Metal sulfide, main component FeS；After leaching the sodium aluminate in clinker, obtained sediment flotation can be obtained
FeS。
Advantageous effect
1, the present invention is comprehensively utilized using ardealite and red mud as key reaction raw material, is adding a certain amount of additive and modification
It being roasted after agent mixed grinding, water mill leaches, and each component can be extracted respectively recycling by then carrying out being separated by solid-liquid separation,
In largely consumption ardealites and while red mud, ardealite and red mud bulk deposition problem can be alleviated, and reduce ardealite and red
Pollution of the mud to environment.
2, trade waste ardealite and red mud are equipped with modifying agent by the present invention, additive comprehensively utilizes, after roasting
Through being separated by solid-liquid separation after water mill dissolves out, basis metal sulfide, meta-aluminate and the silicate formed in roasting process
Ingredient is clearly demarcated, can individually extract, and treatment process is simple, low in raw material price, and which greatly enhances the attached of ardealite and red mud
It is value added.
3, the present invention is carried out by being roasted after ardealite, red mud, additive and modifying agent mixed grinding, then after water mill dissolution
It is separated by solid-liquid separation, obtained product component is clearly demarcated, can individually extract, and effectively raises the comprehensive utilization of ardealite and red mud
Rate.
4, the present invention uses ardealite, red mud and certain additive, modifying agent as raw material, is roasted, after roasting
Intermediate product be free of organic matter, be especially advantageous for the extraction of later stage each useful component, especially obtained from separation of solid and liquid
Aluminium hydroxide, after decolorising agent and dispersant processing, purity can reach 99% or more, be prepare environmental protection flame retardant cardboard good
Good fire retardant raw material.
5, the present invention utilizes obtained aluminium hydroxide after industrial residue phosphogypsum and red mud addition modifying agent and additive, technique
Simply, and primary raw material is of low cost, greatly reduces the price of product aluminium hydroxide, can for producing environmental protection flame retardant cardboard
Its production cost is greatly lowered, and the fire-retardant of the environmental protection flame retardant cardboard, smoke-suppressing are excellent, and Halogen, nontoxic, has very high
Market value.
Performance test
Flame-retardant smoke inhibition experiment is carried out to the environmental protection flame retardant cardboard obtained by embodiment 1, embodiment 2 and embodiment 3, is obtained real in table 1
Test data.
As it can be seen from table 1 the environmental protection flame retardant cardboard obtained by the embodiment of the present invention 1, embodiment 2 and embodiment 3, oxygen
Index reaches 28% or more fire retardant level, is above the fire-retardant cardboard that magnalium talcum or magnesium hydroxide additive amount are 50%；
Its total smoke release is also below the fire-retardant cardboard that magnalium talcum or magnesium hydroxide additive amount are 50%, and test result may indicate that
The environmental protection flame retardant cardboard of the present invention has preferable flame-retardant smoke inhibition effect.
Specific implementation mode
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
The embodiment of the present invention
Embodiment 1：A method of using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, steps are as follows：
（1）Ardealite, red mud, sodium sulphate and carbon are mixed and ground, raw material are made, in raw material, ardealite and red mud are according to 1:
The ratio of 1.3 weight ratios mixes, and sodium sulphate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:
1 addition, the mixed proportion of carbon are the 12% of raw material total weight to be sent into roasting in industrial shaft kiln, and calcination temperature is 1050 DEG C, when roasting
Between be 3h, clinker is made, water mill dissolution is carried out to clinker, and is separated by solid-liquid separation, it is 3 that liquid, which consolidate volume ratio, when separation:1；
（2）By step（1）The middle obtained precipitation that is separated by solid-liquid separation carries out flotation, isolates sulfide, the sulfide isolated is set
Under 40% oxygen-enriched environment, 5h is roasted at 1000 DEG C, the flue gas of generation is roasted after vanadic anhydride catalysis reaction, uses
The concentrated sulfuric acid is absorbed, and sulfuric acid is made；
（3）To step（1）CO is added in middle be separated by solid-liquid separation in obtained liquid2It is no longer generated to precipitation, then will be deposited in 100 DEG C
Lower drying, until moisture obtains thick aluminium hydroxide less than after 0.5%, be added into thick aluminium hydroxide its 0.1wt% sodium perborate and
The ethyl alcohol of 0.05wt% is ground, and grinding is using the ball mill of aluminium oxide liner plate, and abrasive media is alumina balls, and ratio of grinding media to material is
6：1, aluminium hydroxide is made；
（4）By weight, step is taken（3）8 parts of aluminium hydroxide obtained, then take 1 part of polyphosphoric acid, 0.5 part of phosphoric acid, urea 0.5
Part, 2 parts of zinc borate, 0.1 part of gamma-aminopropyl-triethoxy-silane coupling agent, 0.1 part of ethyl alcohol, 0.05 part of glacial acetic acid and paper pulp 80
Part is used as raw material, first mixes polyphosphoric acid, phosphoric acid and urea, is added in reaction kettle, then adds aluminium hydroxide and boric acid
Zinc is heated to 180 DEG C, keeps the temperature 2h, then discharges, and crushed 400 mesh sieve, adds gamma-aminopropyl-triethoxy-silane coupling
Agent, ethyl alcohol and glacial acetic acid carry out surface modification, and modification temperature is 60 DEG C, and modification time 1.5h obtains composite flame-retardant agent, will be compound
Fire retardant is added in a concentration of 0.5% paper pulp after mixing, copies and cardboard is made, and squeezes drying, and environmental-protection flame-retardant is made
Cardboard.
Embodiment 2：A method of using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, steps are as follows：
（1）Ardealite, red mud, sodium sulphate and carbon are mixed and ground, raw material are made, in raw material, ardealite and red mud are according to 1.5:
The ratio of 1 weight ratio mixes, and sodium sulphate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1
Addition, the mixed proportion of carbon are the 20% of raw material total weight to be sent into roasting in industrial shaft kiln, and calcination temperature is 1400 DEG C, when roasting
Between be 0.5h, clinker is made, water mill dissolution is carried out to clinker, and is separated by solid-liquid separation, it is 7 that liquid, which consolidate volume ratio, when separation:1；
（2）By step（1）The middle obtained precipitation that is separated by solid-liquid separation carries out flotation, isolates sulfide, the sulfide isolated is set
Under 45% oxygen-enriched environment, 2h is roasted at 1200 DEG C, the flue gas of generation is roasted after vanadic anhydride catalysis reaction, uses
The concentrated sulfuric acid is absorbed, and sulfuric acid is made；
（3）To step（1）CO is added in middle be separated by solid-liquid separation in obtained liquid2It is no longer generated to precipitation, then will be deposited in 120 DEG C
Lower drying, until moisture obtains thick aluminium hydroxide less than after 0.5%, be added into thick aluminium hydroxide its 0.6wt% sodium perborate and
The ethyl alcohol of 0.2wt% is ground, and using the ball mill of aluminium oxide liner plate, abrasive media is alumina balls, ratio of grinding media to material 9 for grinding：
1, aluminium hydroxide is made；
（4）By weight, step is taken（3）2 parts of aluminium hydroxide obtained, then take 0.5 part of polyphosphoric acid, 0.1 part of phosphoric acid, urea
0.1 part, 0.5 part of zinc borate, 0.05 part of gamma-aminopropyl-triethoxy-silane coupling agent, 0.03 part of ethyl alcohol, 0.01 part of glacial acetic acid and
60 parts of paper pulp is used as raw material, first mixes polyphosphoric acid, phosphoric acid and urea, is added in reaction kettle, then adds aluminium hydroxide
And zinc borate, 170 DEG C are heated to, 1h is kept the temperature, then discharges, 400 mesh sieve is crushed, adds gamma-aminopropyl-triethoxy silicon
Alkane coupling agent, ethyl alcohol and glacial acetic acid carry out surface modification, and modification temperature is 45 DEG C, and modification time 0.5h obtains composite flame-retardant agent,
Composite flame-retardant agent is added in a concentration of 2% paper pulp after mixing, copies and cardboard is made, squeezes drying, environment-friendly type is made
Fire-retardant cardboard.
Embodiment 3：A method of using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, steps are as follows：
（1）Ardealite, red mud, sodium sulphate and carbon are mixed and ground, raw material are made, in raw material, ardealite and red mud according to
1.25:The ratio of 1.15 weight ratios mixes, and sodium sulphate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecule of summation
Than being 1:The mixed proportion of 1 addition, carbon is roasting in the industrial shaft kiln of 16% feeding of raw material total weight, and calcination temperature is 1200 DEG C,
Roasting time is 1.5h, and clinker is made, and carries out water mill dissolution to clinker, and is separated by solid-liquid separation, and liquid consolidates volume ratio and is when separation
5:1；
（2）By step（1）The middle obtained precipitation that is separated by solid-liquid separation carries out flotation, isolates sulfide, the sulfide isolated is set
Under 42% oxygen-enriched environment, 3h is roasted at 1100 DEG C, the flue gas of generation is roasted after vanadic anhydride catalysis reaction, uses
The concentrated sulfuric acid is absorbed, and sulfuric acid is made；
（3）To step（1）CO is added in middle be separated by solid-liquid separation in obtained liquid2It is no longer generated to precipitation, then will be deposited in 110 DEG C
Lower drying, until moisture obtains thick aluminium hydroxide less than after 0.5%, be added into thick aluminium hydroxide its 0.3wt% sodium perborate and
The ethyl alcohol of 0.1wt% is ground, and using the ball mill of aluminium oxide liner plate, abrasive media is alumina balls, ratio of grinding media to material 7 for grinding：
1, aluminium hydroxide is made；
（4）By weight, step is taken（3）5 parts of aluminium hydroxide obtained, then take 0.7 part of polyphosphoric acid, 0.3 part of phosphoric acid, urea
0.2 part, 0.7 part of zinc borate, 0.08 part of gamma-aminopropyl-triethoxy-silane coupling agent, 0.06 part of ethyl alcohol, 0.03 part of glacial acetic acid and
70 parts of paper pulp is used as raw material, first mixes polyphosphoric acid, phosphoric acid and urea, is added in reaction kettle, then adds aluminium hydroxide
And zinc borate, 175 DEG C are heated to, 1.5h is kept the temperature, then discharges, 400 mesh sieve is crushed, adds gamma-aminopropyl-triethoxy
Silane coupling agent, ethyl alcohol and glacial acetic acid carry out surface modification, and modification temperature is 53 DEG C, and modification time 1h obtains composite flame-retardant agent,
Composite flame-retardant agent is added in a concentration of 1% paper pulp after mixing, copies and cardboard is made, squeezes drying, environment-friendly type is made
Fire-retardant cardboard.
Claims (10)
1. a kind of method using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, which is characterized in that include the following steps：
（1）Ardealite, red mud, additive and modifying agent are mixed and ground, raw material are made, is sent into roasting in kiln, clinker is made,
Water mill dissolution is carried out to clinker, and is separated by solid-liquid separation；
（2）By step（1）The middle obtained precipitation of being separated by solid-liquid separation carries out flotation, isolates sulfide, by the sulfide isolated into
Row roasting, then the flue gas that roasting is generated are absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid are made；
（3）To step（1）CO is added in middle be separated by solid-liquid separation in obtained liquid2It is no longer generated to precipitation, then will be deposited in 100-
It is dried at 120 DEG C, until after moisture is less than 0.5%, obtains thick aluminium hydroxide, be added its 0.1-0.6wt%'s into thick aluminium hydroxide
The dispersant of decolorising agent and 0.05-0.2wt% are ground, and aluminium hydroxide is made；
（4）Polyphosphoric acid, phosphoric acid and urea are mixed, is added in reaction kettle, then adds zinc borate and step（3）It is obtained
Aluminium hydroxide heats, then heat preservation discharges, crushes sieving, adds gamma-aminopropyl-triethoxy-silane coupling agent, second
Alcohol and glacial acetic acid carry out surface modification, obtain composite flame-retardant agent, after mixing with paper pulp by composite flame-retardant agent, copy and shape is made,
Drying is squeezed, environmental-protection flame-retardant cardboard is made.
2. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（1）In, the red mud is the red mud that alumina producing Bayer process generates；The additive is sodium carbonate, sodium sulphate
Or caustic soda；The modifying agent is anthracite, carbon or gangue.
3. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（1）In, in the raw material, ardealite and red mud are according to 1-1.5:The ratio of 1-1.3 weight ratios mixes, additive
Adding proportion presses contained Na in raw material2O and Al2O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are made a living
Expect the 12-20% of total weight；Roasting is the roasting time 0.5-3h at 1050-1400 DEG C of temperature；Liquid when dissolution consolidates volume ratio
3-7:1。
4. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（1）In, the kiln is industrial rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
5. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（2）In, the condition of the roasting is that sulfide is placed under the oxygen-enriched environment of 40-45%, is roasted at 1000-1200 DEG C
Burn 2-5h.
6. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（3）In, the decolorising agent is one or more kinds of mixing in SODIUM PERCARBONATE, sodium perborate or sodium peroxydisulfate
Object；The dispersant is ethyl alcohol or polyethylene glycol；Using the ball mill of aluminium oxide liner plate, abrasive media is aluminium oxide for the grinding
Ball, ratio of grinding media to material 6-9：1.
7. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（4）In, by weight, the environmental-protection flame-retardant cardboard includes 0.5-1 parts of polyphosphoric acid, 0.1-0.5 parts of phosphoric acid, urine
0.1-0.5 parts plain, 0.5-2 parts of zinc borate, 2-8 parts of aluminium hydroxide, gamma-aminopropyl-triethoxy-silane coupling agent 0.05-0.1
Part, 0.03-0.1 parts of ethyl alcohol, 0.01-0.05 parts of glacial acetic acid and 60-80 parts of paper pulp.
8. the method according to claim 7 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：By weight, the environmental-protection flame-retardant cardboard includes 0.7 part of polyphosphoric acid, 0.3 part of phosphoric acid, 0.2 part of urea, zinc borate 0.7
Part, 5 parts of aluminium hydroxide, 0.08 part of gamma-aminopropyl-triethoxy-silane coupling agent, 0.06 part of ethyl alcohol, 0.03 part of glacial acetic acid and paper
70 parts of slurry.
9. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（4）In, described pulverize and sieve was 400 mesh sieve；The temperature of the heating is 170-180 DEG C；The time of the heat preservation
For 1-2h；The temperature of the modification is 45-60 DEG C, time 0.5-1.5h.
10. the method according to claim 1 using ardealite and red mud relieving haperacidity coproduction environmental protection flame retardant cardboard, feature exists
In：Step（4）In, a concentration of 0.5-2% of the paper pulp.
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|---|---|---|---|---|
| CN101413054A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Technology for comprehensively utilizing high ferro aluminiferous material |
| CN101891224A (en) * | 2010-06-29 | 2010-11-24 | 河南煤业化工集团有限责任公司 | Method for producing alumina and white carbon black by utilizing red mud and flyash |
| US20110046241A1 (en) * | 2009-08-24 | 2011-02-24 | Keizer Timothy S | Calcium based carrier particles |
| CN105331799A (en) * | 2015-10-20 | 2016-02-17 | 山东建筑大学 | Integrated calcination method for dealkalization and magnetization of Bayer process red mud |
| CN105776150A (en) * | 2014-12-23 | 2016-07-20 | 中国科学院过程工程研究所 | Method for cooperative activation of fly ash and decomposition of gypsum for recovery of sulfur resource |
| CN106868916A (en) * | 2017-02-21 | 2017-06-20 | 浙江科技学院 | A kind of environmental-protection flame-retardant cardboard and preparation method thereof |
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2018
- 2018-07-03 CN CN201810712226.2A patent/CN108797202B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413054A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Technology for comprehensively utilizing high ferro aluminiferous material |
| US20110046241A1 (en) * | 2009-08-24 | 2011-02-24 | Keizer Timothy S | Calcium based carrier particles |
| CN101891224A (en) * | 2010-06-29 | 2010-11-24 | 河南煤业化工集团有限责任公司 | Method for producing alumina and white carbon black by utilizing red mud and flyash |
| CN105776150A (en) * | 2014-12-23 | 2016-07-20 | 中国科学院过程工程研究所 | Method for cooperative activation of fly ash and decomposition of gypsum for recovery of sulfur resource |
| CN105331799A (en) * | 2015-10-20 | 2016-02-17 | 山东建筑大学 | Integrated calcination method for dealkalization and magnetization of Bayer process red mud |
| CN106868916A (en) * | 2017-02-21 | 2017-06-20 | 浙江科技学院 | A kind of environmental-protection flame-retardant cardboard and preparation method thereof |
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