CN108623291A - A kind of technique preparing refractory castable for ladle coproduction acid - Google Patents

A kind of technique preparing refractory castable for ladle coproduction acid Download PDF

Info

Publication number
CN108623291A
CN108623291A CN201810713866.5A CN201810713866A CN108623291A CN 108623291 A CN108623291 A CN 108623291A CN 201810713866 A CN201810713866 A CN 201810713866A CN 108623291 A CN108623291 A CN 108623291A
Authority
CN
China
Prior art keywords
ladle
refractory castable
gahnite
acid
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810713866.5A
Other languages
Chinese (zh)
Inventor
陈肖虎
王帅帅
李杰瑞
李名新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou University
Original Assignee
Guizhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou University filed Critical Guizhou University
Priority to CN201810713866.5A priority Critical patent/CN108623291A/en
Publication of CN108623291A publication Critical patent/CN108623291A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101Refractories from grain sized mixtures
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00Sulfur; Compounds thereof
    • C01B17/69Sulfur trioxide; Sulfuric acid
    • C01B17/74Preparation
    • C01B17/76Preparation by contact processes
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206Magnesium oxides or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C04B2235/3222Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)

Abstract

The present invention provides a kind of techniques preparing refractory castable for ladle coproduction acid, include the following steps:Raw material are made in ardealite, red mud, additive and modifying agent mixed grinding, is sent into kiln and roasts to obtain clinker;Clinker is dissolved out, and carries out being separated by solid-liquid separation isolated solution and prepares aluminium oxide;Aluminium oxide obtained and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, refractory castable for ladle is uniformly mixed to obtain by corundum, hercynite and gahnite are added in mixed powder;Isolated residue is obtained into sulfide through flotation;Sulfuric acid is made in sulfide processing.The present invention, which has, prepares refractory castable for ladle and relieving haperacidity is at low cost, waste residue utilization rate is high, the refractory castable for ladle compressive resistance of preparation is high, heating when permanent Linear change rate is small, bulk density is larger, so that the feature that castable high volume stability is strong, thermal shock resistance is high, resistance to slag is good, simple for process.

Description

A kind of technique preparing refractory castable for ladle coproduction acid
Technical field
The present invention relates to a kind of techniques preparing refractory castable for ladle coproduction acid, belong to field of metallurgy and chemical engineering.
Background technology
Corundum, hercynite and gahnite are utilized for the existing existing inner lining refractory for ladle As aggregate to improve the intensity of castable refractory, ensure that castable refractory is fast after coated in aluminium melting furnace using magnesium phosphate cement Rapid hardening knot is shaped, and magnesia of the castable at the same time in magnesia powder, magnesium phosphate cement also react generation magnalium with alumina powder Spinelle so improves castable refractory to be combined with corundum, hercynite and gahnite, calcium hexaluminate Resistance to slag.But in the production of existing refractory castable for ladle, added using a large amount of aluminium oxide and other raw materials mostly Work is prepared, and the complex manufacturing technology of existing aluminium oxide, production cost are high, cause price of aluminium oxide expensive, greatly increase The production cost of refractory castable for ladle.
Red mud is to refine the waste generated in alumina process with bauxite.It is in crimson color muddy because it is rich in iron And it gains the name.1 ton of aluminium oxide is often produced, 1.0-2.0 tons of red mud is about generated.The year yield of China's red mud is about 1.0 hundred million tons, is tired out It is about 500,000,000 tons to count volume of cargo in storage.
Ardealite refer in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that generates, main component is sulfuric acid Calcium(CaSO4), content generally can reach 70-90% or so.In addition, ardealite also contains plurality of impurities:Undecomposed phosphorus ore, Phosphoric acid, calcirm-fluoride, iron, aluminium compound, acid non-soluble substance, organic matter of non-washes clean etc..Ardealite is discharged every year about in China 20000000 tons, add up nearly hundred million tons of discharge capacity.For utilization rate of the ardealite in terms of building materials less than 5%, a large amount of gypsum stacks occupy soil Ground seriously pollutes environment.
It is now currently, seldom for the technology of the comprehensive utilization of ardealite and red mud, it is substantially focused on building materials and paves the way Traditional field, which results in the waste of a large amount of high value ingredients in ardealite and red mud, added value is very low.And by ardealite and Red mud comprehensively utilizes come refractory castable for ladle processed, while the technique of coproduction acid, has not been reported.
Goal of the invention
The object of the present invention is to provide a kind of techniques preparing refractory castable for ladle coproduction acid.The present invention has system Standby refractory castable for ladle and relieving haperacidity are at low cost, and waste residue utilization rate is high, the resistance to pressure of refractory castable for ladle of preparation Degree is high, heating when permanent Linear change rate is small, bulk density is larger so that castable high volume stability is strong, thermal shock resistance Feature high, resistance to slag is good, simple for process.
Technical scheme of the present invention
A kind of technique preparing refractory castable for ladle coproduction acid, includes the following steps:
A, ardealite, red mud, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made;
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation;
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying and calcination are washed, aluminium oxide is obtained;
D, aluminium oxide made from step C and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;
E, by residue isolated step B through flotation, sulfide is detached to obtain;
F, the step E sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step A, the red mud is Bayer process Produce the red mud that aluminium oxide generates;The additive is sodium carbonate, sodium sulphate or caustic soda;The modifying agent be anthracite, carbon or Gangue.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step A, in the raw material, phosphorus stone Cream and red mud are according to 1:The ratio of 0.7-2 weight ratios mixes, and additive adding proportion presses contained Na in raw material2O and A12O3+Fe2O3 The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are the 10-25% of raw material total weight.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step A, the kiln is that industry is turned round Kiln, Industry Tunnel Kiln or industrial shaft kiln.
It is in temperature 1000-1350 in step A in the technique above-mentioned for preparing refractory castable for ladle coproduction acid Roasting time 1-2h at DEG C.
It is molten after clinker elder generation water mill in step B in the technique above-mentioned for preparing refractory castable for ladle coproduction acid Go out;It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step C, calcination is in temperature 800- Calcination time 3-5h at 1200 DEG C.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step D, by weight, the iron Water packet with castable refractory include 50-60 parts of aluminium oxide, 30-35 parts of corundum, calcium hexaluminate be 20-25 parts, 30-35 parts of magnesia, 20-25 parts of 20-25 parts of hercynite and gahnite.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step D, the corundum, iron aluminium point are brilliant Stone and gahnite are aggregate, and calcium hexaluminate, magnesia, aluminium oxide are powder.
In the technique above-mentioned for preparing refractory castable for ladle coproduction acid, in step D, a diameter of 2- of the corundum 3mm, a diameter of 1-1.5mm of gahnite, a diameter of 0.1-0.5mm of gahnite.
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, Obtain soluble fabulous sodium aluminate(Na2O·Al2O3).[sulphur] in reaction equation refers to by raw material doping and modification Agent technique, the metal sulfide of generation;After leaching the sodium aluminate in clinker, obtained sediment flotation be can be obtained into metal sulphur Compound.
Advantageous effect
1, the present invention and is added after additive and modifying agent by using ardealite and red mud as raw material, in high-temperature roasting Technique under obtain the clinker of main silicate-containing, aluminate and sulfide, and the main component of the aluminate is sodium aluminate, will Sodium aluminate it is water-soluble go out after may be recovered, and after solid residue flotation, obtain sulfide, sulfuric acid prepared using sulfide,
Aluminium oxide is prepared by the sodium aluminate of recycling, aluminium oxide and other raw materials are prepared into refractory castable for ladle, due to Mainly using ardealite and red mud as raw material in entire technique, add other a small amount of substances, therefore, greatly reduce relieving haperacidity and The cost input of refractory castable for ladle.The utilization rate for also greatly increasing ardealite and waste red mud residues, to alleviate phosphorus stone Cream and red mud have important contribution to the pollution of environment.
2, the present invention by raw material by roasting after, obtained ingredient is clearly demarcated, aluminium mainly with aluminic acid na form exist, profit The characteristic of water is highly soluble in sodium aluminate, can be simple and quick be isolated and be used to prepare aluminium oxide, by aluminium oxide with it is other Raw material prepares refractory castable for ladle, refractory castable for ladle compressive resistance is high, heating when permanent Linear change rate it is small, Bulk density is larger so that castable high volume stability is strong, thermal shock resistance is high, and resistance to slag is good, and foundry ladle fire resisting Castable is at low cost.
3, the present invention obtains after the solid residue flotation in technique sulfide, sulfuric acid, relieving haperacidity is prepared using sulfide Cost it is low, acid-making process is simple.
Further to prove that the effect of the present invention, inventor have done following experiment.
1, the experiment of refractory castable for ladle
Inventor is respectively to the refractory castable for ladle in following five groups of embodiments, using existing magnesium phosphate cement by iron Water packet is shaped with castable refractory, and carries out performance detection, and testing result is shown in Table 1;
It is obtained by 1 refractory castable for ladle testing result table analysis of the present invention of table, foundry ladle fire resisting of the invention is poured Material feeding compressive resistance is high, and permanent Linear change rate is small when heating, larger in 1500 DEG C of compressive resistance height, bulk densities, has good Volume stability so that castable high volume stability is strong, thermal shock resistance is high, and resistance to slag is good.
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 kind of technique preparing refractory castable for ladle coproduction acid, steps are as follows:
A, ardealite, Bayer red mud, sodium carbonate and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature Clinker is made in roasting time 1.5h at 1000 DEG C of degree;Wherein, ardealite and Bayer red mud are according to 1:The ratio of 0.7 weight ratio is mixed It closes, sodium carbonate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, it is anthracitic mixed Composition and division in a proportion example is the 10% of raw material total weight;
B, clinker made from step A is consolidated into volume ratio as 4 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation;
C, by residue isolated step B through flotation, sulfide is detached to obtain;
D, the step C sulfide isolated is placed under 30% oxygen-enriched environment, 5h is roasted at 800 DEG C, roast the flue gas of generation After vanadic anhydride catalysis reaction, is absorbed using the concentrated sulfuric acid, sulfuric acid is made;
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying is washed, calcination time 5h obtains aluminium oxide at 800 DEG C of temperature;
F, aluminium oxide made from step E and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;Wherein by weight, the molten iron Packet castable refractory include 50 parts of aluminium oxide, 30 parts of corundum, calcium hexaluminate be 20 parts, 30 parts of magnesia, 20 parts of hercynite With 20 parts of gahnite;The wherein described corundum, hercynite and gahnite are aggregate, calcium hexaluminate, magnesia, oxidation Aluminium is powder;A diameter of 2-3mm of corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。
Embodiment 2:A kind of technique preparing refractory castable for ladle coproduction acid, steps are as follows:
A, ardealite, Bayer red mud, sodium sulphate and carbon are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature Clinker is made in roasting time 2h at 1200 DEG C;Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1 weight ratio mixes, caustic soda Adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:The mixed proportion of 1 addition, carbon is that raw material are total The 15% of weight;
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation;
C, by residue isolated step B through flotation, sulfide is detached to obtain;
D, the step C sulfide isolated is placed under 35% oxygen-enriched environment, 4h is roasted at 900 DEG C, roast the flue gas of generation After vanadic anhydride catalysis reaction, is absorbed using the concentrated sulfuric acid, sulfuric acid is made;
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying is washed, calcination time 4h obtains aluminium oxide at 1000 DEG C of temperature;
F, aluminium oxide made from step E and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;Wherein by weight, the molten iron Packet castable refractory include 60 parts of aluminium oxide, 30 parts of corundum, calcium hexaluminate be 25 parts, 30 parts of magnesia, 25 parts of hercynite With 20 parts of gahnite;The wherein described corundum, hercynite and gahnite are aggregate, calcium hexaluminate, magnesia, oxidation Aluminium is powder;A diameter of 2-3mm of corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。
Embodiment 3:A kind of technique preparing refractory castable for ladle coproduction acid, steps are as follows:
A, ardealite, Bayer red mud, caustic soda and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature Clinker is made in roasting time 1.5h at 1300 DEG C;Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1.3 weight ratios mixes, Sodium carbonate adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixing ratio of gangue Example is the 20% of raw material total weight;
B, clinker made from step A is consolidated into volume ratio as 6 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation;
C, by residue isolated step B through flotation, sulfide is detached to obtain;
D, the step C sulfide isolated is placed under 45% oxygen-enriched environment, 3h is roasted at 1000 DEG C, roast the cigarette of generation Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made;
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying is washed, calcination time 3h obtains aluminium oxide at 1100 DEG C of temperature;
F, aluminium oxide made from step E and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;Wherein by weight, the molten iron Packet castable refractory include 55 parts of aluminium oxide, 32 parts of corundum, calcium hexaluminate be 22 parts, 32 parts of magnesia, 23 parts of hercynite With 20 parts of gahnite;The wherein described corundum, hercynite and gahnite are aggregate, calcium hexaluminate, magnesia, oxidation Aluminium is powder;A diameter of 2-3mm of corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。
Embodiment 4:A kind of technique preparing refractory castable for ladle coproduction acid, steps are as follows:
A, ardealite, Bayer red mud, sodium carbonate and gangue are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature Clinker is made in roasting time 1h at 1350 DEG C of degree;Wherein, ardealite and Bayer red mud are according to 1:The ratio of 1.6 weight ratios mixes, Caustic soda adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of gangue It is the 25% of raw material total weight;
B, clinker made from step A is consolidated into volume ratio as 5 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation;
C, by residue isolated step B through flotation, sulfide is detached to obtain;
D, the step C sulfide isolated is placed under 45% oxygen-enriched environment, 3h is roasted at 1200 DEG C, roast the cigarette of generation Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made;
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying is washed, calcination time 3h obtains aluminium oxide at 1200 DEG C of temperature;
F, aluminium oxide made from step E and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;Wherein by weight, the molten iron Packet castable refractory include 50 parts of aluminium oxide, 32 parts of corundum, calcium hexaluminate be 22 parts, 30 parts of magnesia, 23 parts of hercynite With 25 parts of gahnite;The wherein described corundum, hercynite and gahnite are aggregate, calcium hexaluminate, magnesia, oxidation Aluminium is powder;A diameter of 2-3mm of corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。
Embodiment 5:A kind of technique preparing refractory castable for ladle coproduction acid, steps are as follows:
A, ardealite, Bayer red mud, sodium sulphate and anthracite are mixed and is ground and raw material are made, be sent into industrial rotary kiln in temperature Clinker is made in roasting time 2h at 1200 DEG C of degree;Wherein, ardealite and Bayer red mud are according to 1:The ratio of 2 weight ratios mixes, and burns Alkali adding proportion presses contained Na in raw material2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, anthracitic mixed proportion are The 20% of raw material total weight;
B, clinker made from step A is consolidated into volume ratio as 4 with liquid:1 carries out water mill dissolution, and is separated by solid-liquid separation;
C, by residue isolated step B through flotation, sulfide is detached to obtain;
D, the step C sulfide isolated is placed under 50% oxygen-enriched environment, 4h is roasted at 1100 DEG C, roast the cigarette of generation Gas is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made;
E, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying is washed, calcination time 5h obtains aluminium oxide at 1200 DEG C of temperature;
F, aluminium oxide made from step E and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;Wherein by weight, the molten iron Packet castable refractory include 50 parts of aluminium oxide, 35 parts of corundum, calcium hexaluminate be 25 parts, 35 parts of magnesia, 25 parts of hercynite With 25 parts of gahnite;The wherein described corundum, hercynite and gahnite are aggregate, calcium hexaluminate, magnesia, oxidation Aluminium is powder;A diameter of 2-3mm of corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。

Claims (10)

1. a kind of technique preparing refractory castable for ladle coproduction acid, which is characterized in that include the following steps:
A, ardealite, red mud, additive and modifying agent are mixed and is ground and raw material are made, be sent into roasting in kiln, clinker is made;
B, clinker made from step A is dissolved out, and is separated by solid-liquid separation;
C, CO is added into solution isolated step B2It is no longer generated to white precipitate, it is clear after then filtering out white precipitate Drying and calcination are washed, aluminium oxide is obtained;
D, aluminium oxide made from step C and calcium hexaluminate, magnesia mixed grinding are obtained into mixed powder, it is rigid by being added in mixed powder Beautiful, hercynite and gahnite are uniformly mixed to obtain refractory castable for ladle;
E, by residue isolated step B through flotation, sulfide is detached to obtain;
F, the step E sulfide isolated is placed under the oxygen-enriched environment of 30-50%, 3-5h is roasted at 800-1200 DEG C, roasted The flue gas of generation is absorbed using the concentrated sulfuric acid after vanadic anhydride catalysis reaction, sulfuric acid is made.
2. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step A In, the red mud is the red mud that alumina producing Bayer process generates;The additive is sodium carbonate, sodium sulphate or caustic soda;Institute It is anthracite, carbon or gangue to state modifying agent.
3. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step A In, in the raw material, ardealite and red mud are according to 1:The ratio of 0.7-2 weight ratios mixes, and additive adding proportion presses raw material In contained Na2O and A12O3+Fe2O3The molecular proportion of summation is 1:1 addition, the mixed proportion of modifying agent are the 10- of raw material total weight 25%。
4. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step A In, the kiln is industrial rotary kiln, Industry Tunnel Kiln or industrial shaft kiln.
5. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step A In, it is the roasting time 1-2h at 1000-1350 DEG C of temperature.
6. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step B In, it is dissolved out after clinker elder generation water mill;It is 4-6 that liquid when dissolution, which consolidates volume ratio,:1.
7. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step C In, calcination is the calcination time 3-5h at 800-1200 DEG C of temperature.
8. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step D In, by weight, the refractory castable for ladle is comprising 50-60 parts of aluminium oxide, 30-35 parts of corundum, calcium hexaluminate 20-25 parts of 20-25 parts, 30-35 parts of magnesia, 20-25 parts of hercynite and gahnite.
9. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step D In, the corundum, hercynite and gahnite are aggregate, and calcium hexaluminate, magnesia, aluminium oxide are powder.
10. the technique according to claim 1 for preparing refractory castable for ladle coproduction acid, it is characterised in that:Step D In, a diameter of 2-3mm of the corundum, a diameter of 1-1.5mm of gahnite, a diameter of 0.1- of gahnite 0.5mm。
CN201810713866.5A 2018-07-03 2018-07-03 A kind of technique preparing refractory castable for ladle coproduction acid Pending CN108623291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810713866.5A CN108623291A (en) 2018-07-03 2018-07-03 A kind of technique preparing refractory castable for ladle coproduction acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810713866.5A CN108623291A (en) 2018-07-03 2018-07-03 A kind of technique preparing refractory castable for ladle coproduction acid

Publications (1)

Publication Number Publication Date
CN108623291A true CN108623291A (en) 2018-10-09

Family

ID=63689439

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810713866.5A Pending CN108623291A (en) 2018-07-03 2018-07-03 A kind of technique preparing refractory castable for ladle coproduction acid

Country Status (1)

Country Link
CN (1) CN108623291A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111792927A (en) * 2019-04-09 2020-10-20 宝山钢铁股份有限公司 Low-heat-conduction refractory brick for ladle working lining and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103396128A (en) * 2013-07-25 2013-11-20 浙江锦诚耐火材料有限公司 Casting method of aluminum melting furnace
WO2013176447A1 (en) * 2012-05-23 2013-11-28 스키너스 주식회사 Hybrid foundation structure, and method for building same
CN104311069A (en) * 2014-10-09 2015-01-28 宁夏天纵泓光余热发电技术有限公司 Refractory castable for ladles
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013176447A1 (en) * 2012-05-23 2013-11-28 스키너스 주식회사 Hybrid foundation structure, and method for building same
CN103396128A (en) * 2013-07-25 2013-11-20 浙江锦诚耐火材料有限公司 Casting method of aluminum melting furnace
CN104311069A (en) * 2014-10-09 2015-01-28 宁夏天纵泓光余热发电技术有限公司 Refractory castable for ladles
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111792927A (en) * 2019-04-09 2020-10-20 宝山钢铁股份有限公司 Low-heat-conduction refractory brick for ladle working lining and preparation method thereof

Similar Documents

Publication Publication Date Title
CN101914673B (en) Sodium-translated roasting method of vanadium minerals
CN108752005A (en) The technique that a kind of ardealite and red mud prepare composite ceramic material co-producing sulfuric acid
CN108623291A (en) A kind of technique preparing refractory castable for ladle coproduction acid
CN104961473B (en) A kind of method for producing outlet content of MgO rich forsterite sand less than 70%
CN108793815A (en) A kind of technique of ardealite and red mud relieving haperacidity coproduction concrete accelerator
CN109836128A (en) Utilize the haydite and preparation method thereof of aggregate sandstone tailing production
CN105063362B (en) Preparation method for active nickel iron residues
CN108751966A (en) A kind of technique of ardealite and the hard heat-insulated plate coproduction acid of red mud furnace lining
CN108623293A (en) The technique that a kind of ardealite and red mud prepare high white pottery ceramic material coproduction acid
CN108546096A (en) A kind of technique of ardealite and red mud preparation high tenacity ceramic nozzle material coproduction acid
CN108794024A (en) The technique that a kind of ardealite and low product bauxite prepare saggar repair materials coproduction acid
CN108658112A (en) It is a kind of with the technique of ardealite and red mud aluminium coproduction urea-base compound fertilizer
CN108706554A (en) A kind of technique of ardealite and red mud relieving haperacidity coproduction Machine press carbon-free lining brick for steel ladles
CN108484174A (en) A kind of technique using ardealite and red mud relieving haperacidity coproduction porous silicon carbide ceramic
CN108558374A (en) A kind of technique of ardealite and coal ash for manufacturing High-abrasion-resisthigh-temperature-resceramic high-temperature-resceramic ceramic coproduction acid
CN108706550A (en) A kind of technique of ardealite and red mud refractory plate coproduction acid
CN108706555A (en) A kind of technique of ardealite and low product bauxite ceramic cutting tool material coproduction acid
CN108751141A (en) A kind of method of ardealite and red mud relieving haperacidity coproduction modified phosphate binder
CN108751144A (en) A kind of technique of ardealite and low product bauxite overfiring-proof coating coproduction acid
CN108623295A (en) A kind of technique preparing insulating brick coproduction acid
CN108751954A (en) A kind of technique of ardealite and flyash relieving haperacidity coproduction pressure-and heat-resistance ceramic material
CN108793954A (en) A kind of technique preparing domestic ceramics mud coproduction acid
CN108946681A (en) A kind of technique preparing wear-resisting silicon nitride ceramic material coproduction acid
CN108795008A (en) A kind of technique of ardealite and flyash relieving haperacidity coproduction heat-proof combustion-resistant ABS/PC alloys
CN108706553A (en) A kind of technique of ardealite and coal ash for manufacturing glass bending modular brick coproduction acid

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20181009

RJ01 Rejection of invention patent application after publication