CN109868383A - A kind of preparation method of aluminum alloy smelting deslagging agent - Google Patents
A kind of preparation method of aluminum alloy smelting deslagging agent Download PDFInfo
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Abstract
The invention belongs to founding materials preparation technical fields, and in particular to a kind of preparation method of aluminum alloy smelting deslagging agent.The present invention obtains amorphous kaolinite stone powder by feedstock processing of kaolinite, it is mixed to get modified amorphous kaolin particle with sodium metasilicate, finally by ball milling mixing powder, cryolite powder, the mixed grindings such as titanium boron crystalline flour obtain aluminum alloy smelting deslagging agent, kaolinite and the aluminic acid sodium salt of ice crystal interface can improve the interfacial force of ice crystal coating in the present invention, play good heat preservation coverage effect, play the effect that anti-molten drop splashes, the microdilatancy of amorphous kaolinite prepared by the present invention at high temperature can prevent the growth and aggregation of aluminium alloy aluminium tiny crystal grains, it generates hardening constituent silicated aluminum and is evenly distributed in α-Al matrix, to improve the cracking resistance after molten aluminium alloy solidifies, furthermore titanium and boron can be such that alloy grain refines in the titanium boron crystal powder added, improve prepared aluminium alloy toughness, it has a extensive future.
Description
Technical field
The invention belongs to founding materials preparation technical fields, and in particular to a kind of preparation side of aluminum alloy smelting deslagging agent
Method.
Background technique
As the continuous development of China's foundry engieering is reformed, new Casting Equipment and casting technique are constantly applied, greatly
The casting automatic mo(u)lding line of type has also obtained quick popularization and use at home, and the progress of technology is to traditional founding materials
It puts forward new requirements.
Deslagging agent is the auxiliary material in founding materials, is to handle work for scarfing cinder to provide a kind of convenient product.Deslagging agent exists
Melted under 1200 DEG C or more of high-temperature operation, and have caking property, can effectively assemble with the dross of adsorbing metal solution surface and
Slag inclusion, chemical property are stablized, and will not generate secondary pollution to metallic solution, be widely used in Foundry Production.Deslagging agent is also
A lot of other titles, such as: slag-cleaning agent, Slag conglomeration agent, slagging agent, slagging agent.The main function of deslagging agent is to molten iron surface
Slag is assembled and is bonded, and is to handle work for scarfing cinder to provide a kind of convenient product.Simultaneously also have to molten iron surface into
Row covering reduces molten iron temperature loss and prevents the effect of new slag to reduce oxidation.Deslagging agent is casting industry ratio
More important auxiliary material, performance quality are directly related to the cleannes of molten iron, influence the quality of casting.
Deslagging agent has the advantage that (1) viscosity is big, can sufficiently adsorb molten iron surface slag, operates convenient for scarfing cinder；(2)
It is swift in response, expansion is fast, can diffuse to rapidly after sowing and liquid level is completely covered, and saves the slagging-off time；(3) intensity of slagging tap is high, energy
Enough poly- slags are in heaps, facilitate and slag is clawed or chosen；(4) dosage is few, sweeps along iron loss also low；(5) not glutinous packet, wall built-up, does not reduce work
Make intensity；(6) ingredient of casting solution will not be changed；(7) dust is seldom raised when sowing, without getting angry, working environment is friendly, subtracts
Occupational disease risk etc. is suffered from less.Just because of deslagging agent has the above characteristic, so that it is able to large-scale popularization during removing slag
With use.
Original deslagging agent mostly uses rice-straw ash or asbestos plaster, since the production environment of the deslagging agent has badly been eliminated.
Currently, domestic deslagging agent utilizes natural peral rock, the object of glass substantially using natural peral rock and glass as raw material in the market
Rationality matter removes the gred.Since domestic various regions perlite physical characteristic has larger difference, the expansion fusing in casting iron (steel) water packet
Afterwards, the poly- slag of the melt of formation, effect of skimming are different, this will lead to, and melt property is uncontrollable, slagging-off effect is unstable；In addition, precious
Pearl rock deslagging agent when in use, because the expansion of crystallization water heat can cause explosion, fugitive dust, manufactures slagging-off with natural peral rock
It also needs to be dried at 800 DEG C or less when agent, removes partially crystallizable water, otherwise, when use can cause to burst, and cause environment dirty
Dye influences operator's safety.In addition, deslagging agent is in practical application in addition to deficiency inconvenient for operation in the prior art
Outside, the reaction time is slower, and caking property is poor, is easy to appear slag-off phenomenon.Chinese patent 92105897.7 describes a kind of conjunction
At collection slag agent, it is believed that it is excessive to will appear viscosity when perlite content reaches 80% or more, is easy packet splicing, and it is unclean to turn over packet for dross
The problems such as.A kind of mineral deslagging agent of a kind of SLAX thermal insulation deslagging agent system that country's casting industry uses at present, generally believes effect
It is good, but its price is up to nearly 4000 yuan/ton, undoubtedly increases foundry enterprise expense.
Therefore, find it is a kind of it is cheap, safe and reliable, can the deslagging agent of quick poly- slag have a very important significance.
Summary of the invention
Present invention mainly solves the technical issues of, be perlite deslagging agent for current common deslagging agent, due to domestic each
Ground perlite physical characteristic has larger difference, and the effect that removes the gred in aluminum alloy smelting is unstable, and aluminium alloy toughness produced is owed
It is good, in addition, perlite deslagging agent is when in use, since the expansion of crystallization water heat is easy that molten drop splashing is made also to will affect operator
The defect of safety, provides a kind of preparation method of aluminum alloy smelting deslagging agent.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
The specific preparation step of aluminum alloy smelting deslagging agent are as follows:
Modified amorphous kaolinite particle is mixed with 6061 Al alloy powders, is placed in ball grinder, in turning for 250~300r/min
Lower 1~the 2h of ball milling of speed, collection obtain ball milling mixing powder, take ball milling mixing powder, cryolite powder, titanium boron crystalline flour, sodium nitrate, wood
Powdered carbon mixed grinding crosses 200 meshes and obtains aluminum alloy smelting deslagging agent；
The modified specific preparation step of amorphous kaolinite particle are as follows:
(1) kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, with 450
After 6~8h of~500r/min revolving speed ball milling, 150 meshes are crossed, kaolinite stone powder is obtained；
(2) kaolinite stone powder is placed in tube type resistance furnace, heating melting, melting kaolinite is placed in ice-water bath and is quenched
20~25min obtains amorphous kaolinite, and amorphous kaolin is put into grinding mill processing of milling, is sieved with 100 mesh sieve, amorphous height is obtained
Ridge stone powder；
(3) 5~10min is mixed in sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder, mixed-powder is obtained, by mixed powder
End is placed in ball grinder, the polyglycol solution of mass concentration 20% is added in mixed-powder, with 500~700r/min's
Revolving speed 2~3h of ball milling, obtains ball milling slurry, ball milling slurry is placed in the baking oven that set temperature is 50~80 DEG C, dry 6~
8h obtains modified amorphous kaolinite particle；
The specific preparation step of titanium boron crystalline flour are as follows:
(1) recycle discarded Boron Slag from the iron-smelter using paigeite as raw material, by Boron Slag be put into stone mill grinding 2~
3h, sieving obtain refinement Boron Slag, 400~500g refinement Boron Slag are put into stirred autoclave, heating water bath to 90~95
DEG C, start blender, stirred with the revolving speed of 400~500r/min, 300~400mL mass fraction is added into stirred autoclave
For 85% concentrated sulfuric acid, it is stirred to react 2~3h, obtains boron-rich slurries；
(2) above-mentioned boron-rich slurries are filtered, removes the isolated filtrate of filter residue, 200~300mL mass fraction is added into filtrate
For 20% hydrogen peroxide, mixed oxidization liquid is obtained, titanium chloride is added into mixed oxidization liquid, until mixed oxidization liquid pH to 9~
10, then be filtered, removal hydroxide precipitates to obtain secondary filtrate, secondary filtrate is put into container for evaporation, heat temperature raising
To 80~85 DEG C, it is concentrated by evaporation 4~5h and obtains titanium boron crystalline flour.
Modified amorphous kaolinite particle and 6061 Al alloy powder mixing mass ratios are 1 ︰ 2, control ball material quality when ball milling
Than for 10 ︰ 1.
Aluminum alloy smelting with deslagging agent each component according to parts by weight, including 20~25 parts of ball milling mixing powder, ice crystal
30~40 parts of powder, 4~5 parts of titanium boron crystalline flour, 10~15 parts of sodium nitrate, 10~12 parts of charcoal powder.
Mechanical milling process control ball material mass ratio is 15 ︰ 1 in (1) in the modified specific preparation step of amorphous kaolinite particle.
Heating melting detailed process in (2) in the modified specific preparation step of amorphous kaolinite particle are as follows: be first heated to
150~200 DEG C, 1~2h of preheating is warming up to 1150~1200 DEG C after the completion of preheating with the rate program of 5~10 DEG C/min,
Melting kaolinite is made in 2~3h of Heat preservation.
Sodium metasilicate and amorphous kaolinite stone powder mixing mass ratio in (3) are modified in the specific preparation step of amorphous kaolinite particle
For 1 ︰ 5, solid-to-liquid ratio is 1 ︰ 7 in ball grinder.
Refinement Boron Slag preferred size obtained in the specific preparation step of titanium boron crystalline flour (1) is 200~300 mesh.
In the specific preparation step of titanium boron crystalline flour (1) when boron-rich slurries filter when control filtering boron-rich slurry temperature be 80~
95 DEG C, boron content in filtrate is made to keep higher.
The beneficial effects of the present invention are:
(1) present invention obtains kaolin powder through broken ball milling, kaolinite stone powder is placed in resistance furnace using kaolinite as raw material
After heating preheating, continue heating and melt kaolinite, is quenched melting kaolin to obtain amorphous kaolinite, ground sieving
Amorphous kaolinite stone powder is obtained, sodium metasilicate and amorphous kaolin powder are mixed to get mixed-powder, by ball milling, are dried to obtain
Modified amorphous kaolinite particle and 6061 Al alloy powder mixing and ball millings etc. are obtained ball milling mixing by modified amorphous kaolin particle
Powder finally is sieved ball milling mixing powder, cryolite powder, titanium boron crystalline flour, sodium nitrate, charcoal powder mixed grinding to obtain aluminium alloy
It smelts and uses deslagging agent, kaolinite belongs to anorthic system structure in the present invention, and the crystallization water is removed after quenching heat treatment, makes its layer
Between exist without cation or hydrone, the kaolinite when smelting aluminium alloy after melting can be effectively removed in aluminium alloy and not melted
Impurity, ice crystal powder can be evenly coated at molten aluminium alloy surface to reducing high temperature fused state lower surface tension,
Kaolinite and the aluminic acid sodium salt of ice crystal interface can improve the interfacial force of ice crystal coating, play good heat preservation covering effect
Fruit makes molten surface maintain higher temperature, guarantees that aluminium alloy is in a liquid state, and convenient for slagging-off, and can absorb the generation of carbon system impurity
Carbon dioxide and water weaken the percussion to molten drop, play the effect that anti-molten drop splashes；
(2) microdilatancy of amorphous kaolinite prepared by the present invention at high temperature can prevent aluminium alloy aluminium tiny crystal grains growth and
Aggregation promotes cenotype nucleation, makes molten aluminium alloy entirety crystal grain refinement, generates hardening constituent silicated aluminum and is evenly distributed on α-Al base
In body, which is used as forming core substrate in α-Al matrix, and the crystal grain in significant refining aluminum alloy tissue improves aluminium alloy
Recrystallization temperature avoids the occurrence of coarse gill shape β phase, so that the cracking resistance after molten aluminium alloy solidifies is improved, it is in addition used
60611 Al alloy powders and content of magnesium in mineral powder it is higher, since magnesium fusing point is lower, can molten aluminium alloy to semisolid into
Melt-flow is filled when exhibition, enables aluminum alloy to that Tissue distribution is more uniform, and titanium and boron can make to close in the titanium boron crystal powder furthermore added
Golden crystal grain refinement, the Refining Mechanism of Ti in the alloy is mainly the peritectic reaction generation α-Al occurred at 665 DEG C of temperature, and B
Refining Mechanism in the alloy is originated from boride particle theory, i.e. B is capable of forming some boride particles in aluminum melt, these
Boride can become the forming core heart of α-Al, play thinning effect to alloy, so that prepared aluminium alloy toughness is improved, application
It has a extensive future.
Specific embodiment
Kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, is controlled
Ball material mass ratio is 15 ︰ 1, after 450~500r/min revolving speed ball milling, 6~8h, crosses 150 meshes, obtains kaolinite stone powder；It will be high
Ridge stone powder is placed in tube type resistance furnace, is heated to 150~200 DEG C, 1~2h is preheated, after the completion of preheating, with 5~10
DEG C/rate program of min is warming up to 1150~1200 DEG C, after 2~3h of Heat preservation, melting kaolinite is placed in ice-water bath and is quenched
20~25min of fire processing obtains amorphous kaolinite, and amorphous kaolin is put into grinding mill processing of milling, sieves with 100 mesh sieve, obtains
Amorphous kaolinite stone powder；It is in mass ratio that 1 ︰ 5 is stirred 5~10min by sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder,
Mixed-powder is obtained, mixed-powder is placed in ball grinder, is 1 ︰ 7 by the polyglycol solution of mass concentration 20% by solid-to-liquid ratio
It is added in mixed-powder, with revolving speed 2~3h of ball milling of 500~700r/min, obtains ball milling slurry, ball milling slurry is placed in and is set
Determine in the baking oven that temperature is 50~80 DEG C, dry 6~8h obtains modified amorphous kaolinite particle；From using paigeite as raw material
Discarded Boron Slag is recycled in iron-smelter, and Boron Slag is put into 2~3h of grinding in stone mill, 200~300 meshes is crossed and is refined
400~500g refinement Boron Slag is put into stirred autoclave by Boron Slag, and heating water bath starts blender to 90~95 DEG C, with
The revolving speed of 400~500r/min stirs, and the concentrated sulfuric acid that 300~400mL mass fraction is 85% is added into stirred autoclave, stirs
2~3h of reaction is mixed, boron-rich slurries are obtained；Above-mentioned boron-rich slurries are filtered, controlling boron-rich slurry temperature when filtering is 80~95 DEG C,
The isolated filtrate of filter residue is removed, the hydrogen peroxide that 200~300mL mass fraction is 20% is added into filtrate, obtains mixed oxidization
Titanium chloride is added into mixed oxidization liquid in liquid, until mixed oxidization liquid pH to 9~10, then be filtered, removal hydroxide is heavy
Shallow lake obtains secondary filtrate, and secondary filtrate is put into container for evaporation, is heated to 80~85 DEG C, is concentrated by evaporation 4~5h and obtains
Titanium boron crystalline flour；With 6061 Al alloy powders in mass ratio it is that 1 ︰ 2 is mixed by above-mentioned modified amorphous kaolinite particle, is placed in ball grinder
In, control ball material mass ratio is 10 ︰ 1,1~2h of ball milling under 250~300r/min revolving speed, and collection obtains ball milling mixing powder,
According to parts by weight, 20~25 parts of ball milling mixing powder, 30~40 parts of cryolite powders, 4~5 parts of titanium boron crystalline flours, 10~15 parts are taken
Sodium nitrate, 10~12 parts of charcoal powder mixed grindings cross 200 meshes and obtain aluminum alloy smelting deslagging agent.
Embodiment 1
The preparation of kaolinite stone powder:
Kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, controls ball material
Mass ratio is 15 ︰ 1, after 450r/min revolving speed ball milling 6h, crosses 150 meshes, obtains kaolinite stone powder.
The preparation of amorphous kaolinite stone powder:
Kaolinite stone powder is placed in tube type resistance furnace, is heated to 150 DEG C, preheats 1h, after the completion of preheating, with 5 DEG C/
The rate program of min is warming up to 1150 DEG C, after Heat preservation 2h, melting kaolinite is placed in ice-water bath and is quenched 20min
Amorphous kaolinite is obtained, amorphous kaolin is put into grinding mill processing of milling, is sieved with 100 mesh sieve, obtains amorphous kaolinite stone powder.
The preparation of modified amorphous kaolinite particle:
In mass ratio it is that 1 ︰ 5 is stirred 5min by sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder, obtains mixed-powder, it will
Mixed-powder is placed in ball grinder, and the polyglycol solution of mass concentration 20% is added to mixed-powder for 1 ︰ 7 by solid-to-liquid ratio
In, with the revolving speed ball milling 2h of 500r/min, ball milling slurry is obtained, ball milling slurry is placed in the baking oven that set temperature is 50 DEG C,
Dry 6h obtains modified amorphous kaolinite particle.
The preparation of boron-rich slurries:
Discarded Boron Slag is recycled from the iron-smelter using paigeite as raw material, Boron Slag is put into stone mill and grinds 2h, mistake
200 meshes obtain refinement Boron Slag, 400g refinement Boron Slag are put into stirred autoclave, heating water bath to 90 DEG C, stir by starting
Device is mixed, is stirred with the revolving speed of 400r/min, the concentrated sulfuric acid that 300mL mass fraction is 85% is added into stirred autoclave, stirring is anti-
2h is answered, boron-rich slurries are obtained.
The preparation of titanium boron crystalline flour:
Above-mentioned boron-rich slurries are filtered, controlling boron-rich slurry temperature when filtering is 80 DEG C, the isolated filtrate of filter residue is removed, to filter
The hydrogen peroxide that 200mL mass fraction is 20% is added in liquid, obtains mixed oxidization liquid, titanium chloride is added into mixed oxidization liquid, directly
It to mixed oxidization liquid pH to 9, then is filtered, removal hydroxide precipitates to obtain secondary filtrate, and secondary filtrate is put into evaporation
In container, 80 DEG C are heated to, 4h is concentrated by evaporation and obtains titanium boron crystalline flour.
The preparation of aluminum alloy smelting deslagging agent:
With 6061 Al alloy powders in mass ratio it is that 1 ︰ 2 is mixed by above-mentioned modified amorphous kaolinite particle, is placed in ball grinder, controls
Ball material mass ratio processed is 10 ︰ 1, the ball milling 1h under 250r/min revolving speed, and collection obtains ball milling mixing powder, according to parts by weight,
Take 20 parts of ball milling mixing powder, 30 parts of cryolite powders, 4 parts of titanium boron crystalline flours, 10 parts of sodium nitrate, 10 parts of charcoal powder mixed grindings, mistake
200 meshes obtain aluminum alloy smelting deslagging agent.
Embodiment 2
The preparation of kaolinite stone powder:
Kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, controls ball material
Mass ratio is 15 ︰ 1, after 470r/min revolving speed ball milling 7h, crosses 150 meshes, obtains kaolinite stone powder.
The preparation of amorphous kaolinite stone powder:
Kaolinite stone powder is placed in tube type resistance furnace, is heated to 170 DEG C, preheats 1h, after the completion of preheating, with 7 DEG C/
The rate program of min is warming up to 1175 DEG C, after Heat preservation 2h, melting kaolinite is placed in ice-water bath and is quenched 23min
Amorphous kaolinite is obtained, amorphous kaolin is put into grinding mill processing of milling, is sieved with 100 mesh sieve, obtains amorphous kaolinite stone powder.
The preparation of modified amorphous kaolinite particle:
In mass ratio it is that 1 ︰ 5 is stirred 7min by sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder, obtains mixed-powder, it will
Mixed-powder is placed in ball grinder, and the polyglycol solution of mass concentration 20% is added to mixed-powder for 1 ︰ 7 by solid-to-liquid ratio
In, with the revolving speed ball milling 2h of 600r/min, ball milling slurry is obtained, ball milling slurry is placed in the baking oven that set temperature is 70 DEG C,
Dry 7h obtains modified amorphous kaolinite particle.
The preparation of boron-rich slurries:
Discarded Boron Slag is recycled from the iron-smelter using paigeite as raw material, Boron Slag is put into stone mill and grinds 2h, mistake
250 meshes obtain refinement Boron Slag, 450g refinement Boron Slag are put into stirred autoclave, heating water bath to 93 DEG C, stir by starting
Device is mixed, is stirred with the revolving speed of 450r/min, the concentrated sulfuric acid that 350mL mass fraction is 85% is added into stirred autoclave, stirring is anti-
2h is answered, boron-rich slurries are obtained.
The preparation of titanium boron crystalline flour:
Above-mentioned boron-rich slurries are filtered, controlling boron-rich slurry temperature when filtering is 87 DEG C, the isolated filtrate of filter residue is removed, to filter
The hydrogen peroxide that 250mL mass fraction is 20% is added in liquid, obtains mixed oxidization liquid, titanium chloride is added into mixed oxidization liquid, directly
It to mixed oxidization liquid pH to 9, then is filtered, removal hydroxide precipitates to obtain secondary filtrate, and secondary filtrate is put into evaporation
In container, 83 DEG C are heated to, 5h is concentrated by evaporation and obtains titanium boron crystalline flour.
The preparation of aluminum alloy smelting deslagging agent:
With 6061 Al alloy powders in mass ratio it is that 1 ︰ 2 is mixed by above-mentioned modified amorphous kaolinite particle, is placed in ball grinder, controls
Ball material mass ratio processed is 10 ︰ 1, the ball milling 1h under 270r/min revolving speed, and collection obtains ball milling mixing powder, according to parts by weight,
Take 23 parts of ball milling mixing powder, 35 parts of cryolite powders, 4 parts of titanium boron crystalline flours, 13 parts of sodium nitrate, 11 parts of charcoal powder mixed grindings, mistake
200 meshes obtain aluminum alloy smelting deslagging agent.
Embodiment 3
The preparation of kaolinite stone powder:
Kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, controls ball material
Mass ratio is 15 ︰ 1, after 500r/min revolving speed ball milling 8h, crosses 150 meshes, obtains kaolinite stone powder.
The preparation of amorphous kaolinite stone powder:
Kaolinite stone powder is placed in tube type resistance furnace, is heated to 200 DEG C, preheats 2h, after the completion of preheating, with 10 DEG C/
The rate program of min is warming up to 1200 DEG C, after Heat preservation 3h, melting kaolinite is placed in ice-water bath and is quenched 25min
Amorphous kaolinite is obtained, amorphous kaolin is put into grinding mill processing of milling, is sieved with 100 mesh sieve, obtains amorphous kaolinite stone powder.
The preparation of modified amorphous kaolinite particle:
In mass ratio it is that 1 ︰ 5 is stirred 10min by sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder, obtains mixed-powder,
Mixed-powder is placed in ball grinder, the polyglycol solution of mass concentration 20% is added to mixed-powder for 1 ︰ 7 by solid-to-liquid ratio
In, with the revolving speed ball milling 3h of 700r/min, ball milling slurry is obtained, ball milling slurry is placed in the baking oven that set temperature is 80 DEG C,
Dry 8h obtains modified amorphous kaolinite particle.
The preparation of boron-rich slurries:
Discarded Boron Slag is recycled from the iron-smelter using paigeite as raw material, Boron Slag is put into stone mill and grinds 3h, mistake
300 meshes obtain refinement Boron Slag, 500g refinement Boron Slag are put into stirred autoclave, heating water bath to 95 DEG C, stir by starting
Device is mixed, is stirred with the revolving speed of 500r/min, the concentrated sulfuric acid that 400mL mass fraction is 85% is added into stirred autoclave, stirring is anti-
3h is answered, boron-rich slurries are obtained.
The preparation of titanium boron crystalline flour:
Above-mentioned boron-rich slurries are filtered, controlling boron-rich slurry temperature when filtering is 95 DEG C, the isolated filtrate of filter residue is removed, to filter
The hydrogen peroxide that 300mL mass fraction is 20% is added in liquid, obtains mixed oxidization liquid, titanium chloride is added into mixed oxidization liquid, directly
It to mixed oxidization liquid pH to 10, then is filtered, removal hydroxide precipitates to obtain secondary filtrate, and secondary filtrate is put into evaporation
In container, 85 DEG C are heated to, 5h is concentrated by evaporation and obtains titanium boron crystalline flour.
The preparation of aluminum alloy smelting deslagging agent:
With 6061 Al alloy powders in mass ratio it is that 1 ︰ 2 is mixed by above-mentioned modified amorphous kaolinite particle, is placed in ball grinder, controls
Ball material mass ratio processed is 10 ︰ 1, the ball milling 2h under 300r/min revolving speed, and collection obtains ball milling mixing powder, according to parts by weight,
Take 25 parts of ball milling mixing powder, 40 parts of cryolite powders, 5 parts of titanium boron crystalline flours, 15 parts of sodium nitrate, 12 parts of charcoal powder mixed grindings, mistake
200 meshes obtain aluminum alloy smelting deslagging agent.
Comparative example 1: it is essentially identical with the preparation method of example 1, it has only the difference is that modified amorphous kaolinite is not added
Grain.
Comparative example 2: it is essentially identical with the preparation method of example 2, it has only the difference is that titanium boron crystalline flour is not added.
Comparative example 3: the deslagging agent of Guangzhou company production.
Aluminum alloy smelting produced by the present invention is detected with the deslagging agent in deslagging agent and comparative example, testing result is such as
Shown in table 1:
By the deslagging agent in aluminum alloy smelting deslagging agent produced by the present invention and comparative example, add respectively according to the 5% of molten aluminum weight
Enter molten aluminum, molten aluminum is sufficiently stirred using stirring rod, 5min is stirred to react at 720~760 DEG C, filter out dross later, completes aluminium
Purification detects effect of slagging tap.
1 performance measurement result of table
From the data in table 1, it can be seen that aluminum alloy smelting deslagging agent produced by the present invention, with unfailing performance height, separating capacity is strong, makes
It is standby to facilitate, using the advantages that simple, cheap, the extensive application in terms of aluminum anodizing.
Claims (8)
1. a kind of preparation method of aluminum alloy smelting deslagging agent, it is characterised in that specific preparation step are as follows:
Modified amorphous kaolinite particle is mixed with 6061 Al alloy powders, is placed in ball grinder, in turning for 250~300r/min
Lower 1~the 2h of ball milling of speed, collection obtain ball milling mixing powder, take ball milling mixing powder, cryolite powder, titanium boron crystalline flour, sodium nitrate, wood
Powdered carbon mixed grinding crosses 200 meshes and obtains aluminum alloy smelting deslagging agent；
The specific preparation step of modification amorphous kaolinite particle are as follows:
(1) kaolinite is taken, places it in and is broken into fragment in hydraulic breaker, kaolinite fragment is placed in ball grinder, with 450
After 6~8h of~500r/min revolving speed ball milling, 150 meshes are crossed, kaolinite stone powder is obtained；
(2) kaolinite stone powder is placed in tube type resistance furnace, heating melting, melting kaolinite is placed in ice-water bath and is quenched
20~25min obtains amorphous kaolinite, and amorphous kaolin is put into grinding mill processing of milling, is sieved with 100 mesh sieve, amorphous height is obtained
Ridge stone powder；
(3) 5~10min is mixed in sodium metasilicate and above-mentioned gained amorphous kaolinite stone powder, mixed-powder is obtained, by mixed powder
End is placed in ball grinder, the polyglycol solution of mass concentration 20% is added in mixed-powder, with 500~700r/min's
Revolving speed 2~3h of ball milling, obtains ball milling slurry, ball milling slurry is placed in the baking oven that set temperature is 50~80 DEG C, dry 6~
8h obtains modified amorphous kaolinite particle；
The specific preparation step of titanium boron crystalline flour are as follows:
(1) recycle discarded Boron Slag from the iron-smelter using paigeite as raw material, by Boron Slag be put into stone mill grinding 2~
3h, sieving obtain refinement Boron Slag, 400~500g refinement Boron Slag are put into stirred autoclave, heating water bath to 90~95
DEG C, start blender, stirred with the revolving speed of 400~500r/min, 300~400mL mass fraction is added into stirred autoclave
For 85% concentrated sulfuric acid, it is stirred to react 2~3h, obtains boron-rich slurries；
(2) above-mentioned boron-rich slurries are filtered, removes the isolated filtrate of filter residue, 200~300mL mass fraction is added into filtrate
For 20% hydrogen peroxide, mixed oxidization liquid is obtained, titanium chloride is added into mixed oxidization liquid, until mixed oxidization liquid pH to 9~
10, then be filtered, removal hydroxide precipitates to obtain secondary filtrate, secondary filtrate is put into container for evaporation, heat temperature raising
To 80~85 DEG C, it is concentrated by evaporation 4~5h and obtains titanium boron crystalline flour.
2. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: described changes
Property amorphous kaolinite particle and 6061 Al alloy powder mixing mass ratios be 1 ︰ 2, control ball material mass ratio is 10 ︰ 1 when ball milling.
3. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: the aluminium
Alloy smelting with deslagging agent each component according to parts by weight, including 20~25 parts of ball milling mixing powder, 30~40 parts of cryolite powder,
4~5 parts of titanium boron crystalline flour, 10~15 parts of sodium nitrate, 10~12 parts of charcoal powder.
4. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: described changes
Property the specific preparation step of amorphous kaolinite particle in (1) mechanical milling process control ball material mass ratio be 15 ︰ 1.
5. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: institute
Heating melting detailed process in (2) in the specific preparation step of modification amorphous kaolinite particle stated are as follows: be first heated to
150~200 DEG C, 1~2h of preheating is warming up to 1150~1200 DEG C after the completion of preheating with the rate program of 5~10 DEG C/min,
Melting kaolinite is made in 2~3h of Heat preservation.
6. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: described changes
Property the specific preparation step of amorphous kaolinite particle in (3) sodium metasilicate and amorphous kaolinite stone powder mixing mass ratio be 1 ︰ 5, ball milling
Solid-to-liquid ratio is 1 ︰ 7 in tank.
7. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: the titanium
Refinement Boron Slag preferred size obtained in the specific preparation step of boron crystalline flour (1) is 200~300 mesh.
8. a kind of preparation method of aluminum alloy smelting deslagging agent according to claim 1, it is characterised in that: the titanium
When boron-rich slurries filter, boron-rich slurry temperature is 80~95 DEG C when control filtering in the specific preparation step of boron crystalline flour (1), makes to filter
Boron content is kept higher in liquid.
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| CN115341154A (en) * | 2022-09-21 | 2022-11-15 | 南通瑞泰针业有限公司 | High-toughness and high-strength sewing machine needle |
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