CN101285112A - Coating granule magnesium desulfurizer and preparation method thereof - Google Patents
Coating granule magnesium desulfurizer and preparation method thereof Download PDFInfo
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- CN101285112A CN101285112A CNA2008100314291A CN200810031429A CN101285112A CN 101285112 A CN101285112 A CN 101285112A CN A2008100314291 A CNA2008100314291 A CN A2008100314291A CN 200810031429 A CN200810031429 A CN 200810031429A CN 101285112 A CN101285112 A CN 101285112A
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Abstract
The invention discloses coating solid magnesium desulfurizer and a manufacture method thereof; the coating solid magnesium desulfurizer is made of following components in weight percentage: (1) 94 to 97 percent of metal solid magnesium, 1 to 4 percent of magnesia powder, 0.1 to 1.0 percent of graphite powder, 0.5 to 1.5 percent of chloride, 0.1 to 0.5 percentof selenious acid and 0.2 to 0.6 percent of silicone grease; (2) components producing process is as follows: raw material - mix - agitation - response - adding package agent - dry -screen separation - finished product; earthy graphite powder, magnesia, chlorine salt, selenious acid and silicone grease are adopted as the composition and such producing technical solution is adopted as from raw material - mix - agitation - response - adding package agent - dry - screen separation - finished product. The method overcomes such flaws exiting in the prior coating solid magnesium desulfurizer as surface hygroscopicity and agglomeration of the solid magnesium, inconvenience for transportation and storage, lance sticking, jammed and splattering in the process of spraying and blowing, a plurality of used cerium oxide, expensive price, bad effect of formaldehyde on human heath and environment pollution, etc. The coating solid magnesium desulfurizer and the manufacture method are widely applied in molten iron pre-desulphurization and molten steel deepening desulphurization production in steel and iron smelting industry.
Description
Technical field
The present invention relates to a kind of coating granule magnesium desulfurizer that is used for smelting iron and steel industry molten iron pre-desulfurization and the dark desulfurization of molten steel and preparation method thereof, especially a kind of composite coating particles magnesium desulfurizer that contains amorphous graphite powder, magnesium oxide, villaumite, selenous acid and silicone grease series and preparation method thereof.
Background technology
Development of modern industry has proposed higher requirement to Iron And Steel Industry, how to reduce to greatest extent that the content of sulphur has become one of first-selected task in the steelmaking process in the steel, particularly for the production of all very high added value steel grade (as IF steel, senior pipe line steel etc.) of intensity and toughness reguirements.
MAGNESIUM METAL is a kind of very light metal, and ordination number is: 12, and nucleidic mass: 24.305, solid-state lower density is 1.74 * 10
3Kg/cm
3, only be 1/4 of iron, fusing point (651 ℃) and boiling point (1107 ℃) are all very low.Be to exist with gas form under the smelting iron and steel temperature, the solubleness of magnesium in molten iron is very limited, and the magnesium desulfurization degree depends primarily on its solubleness in molten iron, as magnesium is directly added in the molten iron, easily causes molten iron splash even blast.In addition, the easy oxidation of MAGNESIUM METAL, burning are all existing very big difficulty aspect processing, preservation, transportation and the use.Therefore, for using magnesium desulfurizer safely and efficiently, must carry out coating to its surface handles, to guarantee the safe in utilization of it and to prolong its duration of fire resistance in molten iron---make the magnesium that sprays in the molten iron with the highest efficient gasification and dissolve in molten iron, desulphurization reaction efficiently takes place, and reaches most economical desulfurization purpose.
In the existing disclosed patent documentation, as the Chinese patent publication number is that " a kind of manufacture method of iron melt desulfurizing agent-coating granule magnesium " of CN1459510 disclosed various villaumite (sodium-chlor, magnesium chloride, Repone K, calcium chloride, bariumchloride) mixes the back by a certain percentage and in 100 ℃ of water, be dissolved into liquid villaumite, the temperature that places raw material again is in 210 ℃-240 ℃ the rotation still, while rotating liquid villaumite spray on raw material magnesium grain surface, at high temperature dry and make the technical scheme of product, villaumite covers magnesium grain surface in this technical scheme, the moisture absorption very easily, when serious even caking, not only be unfavorable for depositing of product, and in the winding-up process, easily produce stifled rifle, phenomenons such as splash.And for example the Chinese patent publication number be " containing inactivating magnesium desulfurizing agent of rare earth oxide and preparation method thereof " of CN1962889 disclosed be earlier with metal magnesium granule and cerium oxide, the magnesium oxide pulvis is done and is mixed, again with acetic acid, magnesium chloride mixes with water and is made into passivating solution, then passivating solution is poured in the MAGNESIUM METAL of mixed cerium oxide and magnesium oxide pulvis, stirring is till dry materials, make the inactivating magnesium desulfurizing agent that contains rare earth oxide behind the naturally cooling, cerium oxide in this disclosed inactivating magnesium desulfurizing agent is a kind of rare earth oxide, market value costliness (-$30000 unit of Yue Wei $25000 unit is per ton), the cerium oxide consumption is big in this sweetening agent process of preparation, and production cost is high; And the acetic acid in this invention has intensive corrodibility, and it is acid that its aqueous solution is, and easily reacts with MAGNESIUM METAL, the loss Mg content, makes the desulfurization degree reduction.For another example, the Chinese patent publication number be CN1647873's " a kind of deactivating magnesium powder " disclosed be in granular magnesium powder, to add the deactivating magnesium powder that is used for steel desulfurization that fire retardant and binding agent are made, its fire retardant is bath of glass, magnesium hydroxide, fossil meal, rhombspar or its mixture, binding agent is 107 glue, but the deactivating magnesium powder top coat that this invention is prepared comes off easily, be unfavorable for the transportation and the storage of magnesium, and in sweetening process, easily cause splash, contain the formaldehyde that is detrimental to health in the 107 used glue, environmental pollution is serious.Also have, what the Chinese patent publication number was that CN1311070's " composite coating magnesium particles and preparation method thereof " disclose is to be coated with one deck hydrophobizing agent on the surface of metal magnesium granule earlier, on hydrophobizing agent, be coated with one deck fire retardant again, its hydrophobic layer is a rosin, silicone oil, in the lithium hydroxide one or both, flame-retardant layer is a calcium oxide, magnesium oxide, aluminium sesquioxide, Vanadium Pentoxide in FLAKES, silicon-dioxide and composition thereof, but the material of the hydrophobic layer described in this invention can produce secondary influence to molten iron, make the slag that produces in the sweetening process many, the iron loss that thereby making skims causes increases, and the particle magnesium surface coating that this kind method is produced very easily comes off in transportation, easily causes sticking rifle even stifled rifle in the desulfurization use.
Summary of the invention
At above-mentioned situation, the object of the present invention is to provide a kind of coating granule magnesium desulfurizer, it is evenly closely knit, the activated carbon content height in surface both, again long, the good fluidity of duration of fire resistance, and sticking rifle, stifled rifle, not splash in the winding-up process, convenient transportation and storage.Another object of the present invention is to provide a kind of preparation method of coating granule magnesium desulfurizer, and both technology was simple for it, and facility investment is few, and production cost is low, and is easy to operate again, and process period is short, and output is big, the efficient height.
For achieving the above object, a kind of coating granule magnesium desulfurizer, its component and content (weight percentage) are:
Metallic particles magnesium 94%-97% magnesia powder 1%-4%
Graphite Powder 99 0.1%-1.0% villaumite 0.5%-1.5%
Selenous acid 0.1%-0.5% silicone grease 0.2%-0.6%.
For achieving the above object, its further optimized Measures is that component and content (weight percentage) are:
Metallic particles magnesium 95% magnesia powder 3%
Graphite Powder 99 1.0% villaumite 0.5%
Selenous acid 0.1% silicone grease 0.4%.
For achieving the above object, its further optimized Measures is that component and content (weight percentage) are:
Metallic particles magnesium 97% magnesia powder 1%
Graphite Powder 99 0.4% villaumite 1.0%
Selenous acid 0.3% silicone grease 0.3%.
For achieving the above object, the requirement that its further optimized Measures is described component is: metallic particles magnesium is powdery, and its granularity is 14 orders-60 orders, and Mg content is not less than 99%; Carbon content is not less than 80% in the Graphite Powder 99; Mg content is not less than 85% in the magnesia powder; Villaumite is one or both in Repone K, the magnesium chloride; Selenous acid is the strong oxidizer of colourless hexagonal; Silicone grease series coating agent is flame retardant resistance silicone grease or high hydrogeneous silicone grease.
For realizing above-mentioned another purpose, prepare the method for coating granule magnesium desulfurizer, it comprises the steps:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
1. choose raw material, standby;
2. getting metallic particles magnesium revolves in the mixing tank in conical double ribbon;
3. adding granularity in the mixing tank is 300 orders-450 purpose magnesia powder, and 300 orders-450 purpose amorphous graphite powder stirs, and makes the coating particles magnesium compound;
4. get magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 90g/L-100g/L, standby;
5. in above-mentioned magnesium chloride solution, add 0.1-0.5 gram selenous acid and make passivating solution;
6. above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 5-15 minute by 1: 15～1: 30 mixed, make the coating granule magnesium reactant, standby;
7. get the high hydrogeneous silicone grease of 0.2g-0.6g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
8. it is dry under 105 ℃ of-120 ℃ of temperature to contain the silicone grease coating granule magnesium;
9. make the coating granule magnesium finished product through bolting.
The present invention's employing contains amorphous graphite powder, magnesium oxide, villaumite, selenous acid and silicone grease composition composition and takes from the technology of preparing scheme of raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product, it has overcome existing coating granule magnesium desulfurizer and has had magnesium grain the surface easily moisture absorption, caking, inconvenience is deposited and is transported, easily produce in the winding-up process sticking rifle, stifled rifle, splash etc. and cerium oxide consumption big, cost an arm and a leg, formaldehyde influences defectives such as HUMAN HEALTH and contaminate environment.
Compared with prior art, the present invention has following beneficial effect:
(I) not only the surface is evenly closely knit for the coating granule magnesium that makes of the present invention, and metallic particles magnesium does not lose activated carbon content height (greater than 93.5%) in coating procedure; Therefore magnesium consumption low (on average consuming the magnesium amount is 0.387kg/t iron) in sweetening process, desulfurization degree height (average desulfurization degree reaches 90.53%).
(II) the coating granule magnesium duration of fire resistance that makes of the present invention long (being 17s-22s under 1000 ℃ of temperature), good fluidity (IC＜26 ℃), sticking rifle, stifled rifle, not splash in the winding-up process.
(III) the coating granule magnesium humidity resistance that makes of the present invention obviously (hygroscopic water amount＜0.24%) does not produce dust, more helps the transportation and the storage of product.
(IV) production technique of the present invention is simple, small investment of production equipment, and cost is low, and is easy to operate, and process period is short, the production efficiency height, output is big.
The present invention is widely used in during the dark desulfurization of molten iron pre-desulfurization and molten steel is produced in the smelting iron and steel industry.
The present invention is further detailed explanation below in conjunction with embodiment.
Embodiment
Embodiment 1
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 94% magnesia powder 4%
Graphite Powder 99 0.1% villaumite 1.5%
Selenous acid 0.2% silicone grease 0.2%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 94 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 4g granularity in the mixing tank is 300 purpose magnesia powders, and the 0.1g granularity is 300 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get the 1.5g magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 90g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.2 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 5 minutes by 1: 15 mixed, make the coating granule magnesium reactant, standby;
(7) get the high hydrogeneous silicone grease of 0.2g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 105 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 2
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 95% magnesia powder 3%
Graphite Powder 99 1.0% villaumite 0.5%
Selenous acid 0.1% silicone grease 0.4%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 95 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 3g granularity in the mixing tank is 350 purpose magnesia powders, and the 1.0g granularity is 350 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get the 0.5g magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 93g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.1 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 7 minutes by 1: 20 mixed, make the coating granule magnesium reactant, standby;
(7) get the high hydrogeneous silicone grease of 0.4g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 110 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 3
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 96% magnesia powder 2%
Graphite Powder 99 0.2% villaumite 0.7%
Selenous acid 0.5% silicone grease 0.6%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 96 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 2g granularity in the mixing tank is 400 purpose magnesia powders, and the 0.2g granularity is 400 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get the 0.7g magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 96g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.5 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 9 minutes by 1: 25 mixed, make the coating granule magnesium reactant, standby;
(7) get the high hydrogeneous silicone grease of 0.6g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 115 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 4
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 97% magnesia powder 1%
Graphite Powder 99 0.4% villaumite 1.0%
Selenous acid 0.3% silicone grease 0.3%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 97 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 1g granularity in the mixing tank is 450 purpose magnesia powders, and the 0.4g granularity is 450 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get the 1.0g magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 100g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.3 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 11 minutes by 1: 30 mixed, make the coating granule magnesium reactant, standby;
(7) get the high hydrogeneous silicone grease of 0.3g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 120 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 5
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 94% magnesia powder 4%
Graphite Powder 99 0.1% villaumite 1.5%
Selenous acid 0.2% silicone grease 0.2%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 94 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 4g granularity in the mixing tank is 300 purpose magnesia powders, and the 0.1g granularity is 300 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get 0.75g magnesium chloride, 0.75g Repone K in container, add water and be mixed with the magnesium chloride solution that concentration is 90g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.2 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound are reacted 12 clocks by 1: 15 mixed, make the coating granule magnesium reactant, standby;
(7) get 0.2g flame retardant resistance silicone grease and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 105 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 6
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 95% magnesia powder 3%
Graphite Powder 99 1.0% villaumite 0.5%
Selenous acid 0.1% silicone grease 0.4%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 95 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 3g granularity in the mixing tank is 350 purpose magnesia powders, and the 1.0g granularity is 350 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get 0.25g magnesium chloride, 0.25g Repone K in container, add water and be mixed with the magnesium chloride solution that concentration is 93g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.1 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 13 minutes by 1: 20 mixed, make the coating granule magnesium reactant, standby;
(7) get 0.4g flame retardant resistance silicone grease and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 110 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 7
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 96% magnesia powder 2%
Graphite Powder 99 0.2% villaumite 0.7%
Selenous acid 0.5% silicone grease 0.6%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 96 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 2g granularity in the mixing tank is 400 purpose magnesia powders, and the 0.2g granularity is 400 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get 0.35g magnesium chloride, 0.35g Repone K in container, add water and be mixed with the magnesium chloride solution that concentration is 96g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.5 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 14 minutes by 1: 25 mixed, make the coating granule magnesium reactant, standby;
(7) get 0.6g flame retardant resistance silicone grease and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 115 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Embodiment 8
The component of A, coating granule magnesium desulfurizer and content (weight percentage) are:
Metallic particles magnesium 97% magnesia powder 1%
Graphite Powder 99 0.4% villaumite 1.0%
Selenous acid 0.3% silicone grease 0.3%.
The step of B, preparation coating granule magnesium desulfurizer:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
(1) choose above-mentioned raw materials, standby;
(2) getting metallic particles magnesium 97 restrains in conical double ribbon and revolves in the mixing tank;
(3) adding the 1g granularity in the mixing tank is 450 purpose magnesia powders, and the 0.4g granularity is 450 purpose amorphous graphite powder, stirs, and makes the coating particles magnesium compound;
(4) get 0.5g magnesium chloride, 0.5g Repone K in container, add water and be mixed with the magnesium chloride solution that concentration is 100g/L, standby;
(5) in above-mentioned magnesium chloride solution, add 0.3 gram selenous acid and make passivating solution;
(6) above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 15 minutes by 1: 30 mixed, make the coating granule magnesium reactant, standby;
(7) get 0.3g flame retardant resistance silicone grease and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
(8) will contain silicone grease coating granule magnesium drying under 120 ℃ of temperature;
(9) make the coating granule magnesium finished product through bolting.
Each component in the foregoing description requires: metallic particles magnesium is powdery, and its granularity is 14 orders-60 orders, and Mg content is not less than 99%; Carbon content is not less than 80% in the Graphite Powder 99; Mg content is not less than 85% in the magnesia powder; Villaumite is one or both in Repone K, the magnesium chloride; Selenous acid is the strong oxidizer of colourless hexagonal; Silicone grease series coating agent is flame retardant resistance silicone grease or high hydrogeneous silicone grease.
Coating granule magnesium desulfurizer of the present invention/embodiment 1-8/ physicochemical property table 1.
| Title | Activated carbon content % | Cl -Content/% | 1000 ℃ of following duration of fire resistance/s | Angle of repose (IC)/° | Hygroscopic water amount % |
| Embodiment 1 | 93.57 | 1.15 | 17 | 26 | 0.21 |
| Embodiment 2 | 94.25 | 1.09 | 17 | 26 | 0.20 |
| Embodiment 3 | 95.03 | 0.98 | 18 | 25 | 0.20 |
| Embodiment 4 | 95.82 | 1.10 | 20 | 25 | 0.18 |
| Embodiment 5 | 93.60 | 1.20 | 19 | 26 | 0.22 |
| Embodiment 6 | 94.49 | 1.10 | 19 | 26 | 0.21 |
| Embodiment 7 | 95.25 | 1.05 | 21 | 25 | 0.22 |
| Embodiment 8 | 96.08 | 1.15 | 22 | 25 | 0.24 |
Coating granule magnesium desulfurizer of the present invention at steel mill's desulfurization record on probation as following table 2.
| Melting number | Iron water amount T | Initial sulphur/% | Target sulphur % | Terminal point sulphur % | Sweetening agent add-on/kg | Consumption magnesium amount (kg/t iron) | Desulfurization degree % |
| 1060827 | 86 | 0.045 | 0.005 | 0.005 | 30.62 | 0.356 | 88.89 |
| 1060828 | 88 | 0.046 | 0.005 | 0.005 | 35.20 | 0.400 | 89.13 |
| 1060829 | 88 | 0.045 | 0.005 | 0.003 | 33.96 | 0.386 | 93.33 |
| 1060830 | 88 | 0.046 | 0.010 | 0.003 | 37.22 | 0.423 | 93.48 |
| 1060831 | 78 | 0.048 | 0.010 | 0.005 | 31.25 | 0.401 | 89.58 |
| 1060832 | 85 | 0.070 | 0.010 | 0.007 | 29.78 | 0.350 | 90.00 |
| 1060833 | 86 | 0.053 | 0.010 | 0.005 | 36.12 | 0.420 | 90.57 |
| 1060834 | 76 | 0.065 | 0.010 | 0.007 | 27.36 | 0.360 | 89.23 |
| On average | 0.387 | 90.53 |
Claims (5)
1, a kind of coating granule magnesium desulfurizer, its component and content (weight percentage) are:
Metallic particles magnesium 94%-97% magnesia powder 1%-4%
Graphite Powder 99 0.1%-1.0% villaumite 0.5%-1.5%
Selenous acid 0.1%-0.5% silicone grease 0.2%-0.6%.
2, coating granule magnesium desulfurizer according to claim 1, its component and content (weight percentage) are:
Metallic particles magnesium 95% magnesia powder 3%
Graphite Powder 99 1.0% villaumite 0.5%
Selenous acid 0.1% silicone grease 0.4%.
3, coating granule magnesium desulfurizer according to claim 1, its component and content (weight percentage) are:
Metallic particles magnesium 97% magnesia powder 1%
Graphite Powder 99 0.4% villaumite 1.0%
Selenous acid 0.3% silicone grease 0.3%.
4, according to claim 1 or 2 or 3 described coating granule magnesium desulfurizers, it is characterized in that the requirement of described component is: metallic particles magnesium is powdery, and its granularity is 14 orders-60 orders, and Mg content is not less than 99%; Carbon content is not less than 80% in the Graphite Powder 99; Mg content is not less than 85% in the magnesia powder; Villaumite is one or both in Repone K, the magnesium chloride; Selenous acid is the strong oxidizer of colourless hexagonal; Silicone grease series coating agent is flame retardant resistance silicone grease or high hydrogeneous silicone grease.
5, prepare the method for the described coating granule magnesium desulfurizer of claim 1, it comprises the steps:
I, technical process
Raw material-mixing-stirring-reaction-adding coating agent-drying-screening-finished product;
II, composition operation steps
1. choose raw material, standby;
2. getting metallic particles magnesium revolves in the mixing tank in conical double ribbon;
3. adding granularity in the mixing tank is 300 orders-450 purpose magnesia powder, and 300 orders-450 purpose amorphous graphite powder stirs, and makes the coating particles magnesium compound;
4. get magnesium chloride in container, add water and be mixed with the magnesium chloride solution that concentration is 90g/L-100g/L, standby;
5. in above-mentioned magnesium chloride solution, add 0.1-0.5 gram selenous acid and make passivating solution;
6. above-mentioned passivating solution and above-mentioned coating particles magnesium compound were reacted 5-15 minute by 1: 15～1: 30 mixed, make the coating granule magnesium reactant, standby;
7. get the high hydrogeneous silicone grease of 0.2g-0.6g and add above-mentioned coating granule magnesium reactant, stir, make and contain the silicone grease coating granule magnesium;
8. it is dry under 105 ℃ of-120 ℃ of temperature to contain the silicone grease coating granule magnesium;
9. make the coating granule magnesium finished product through bolting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810031429A CN100588721C (en) | 2008-06-02 | 2008-06-02 | Coating granule magnesium desulfurizer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810031429A CN100588721C (en) | 2008-06-02 | 2008-06-02 | Coating granule magnesium desulfurizer and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101285112A true CN101285112A (en) | 2008-10-15 |
| CN100588721C CN100588721C (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810031429A Expired - Fee Related CN100588721C (en) | 2008-06-02 | 2008-06-02 | Coating granule magnesium desulfurizer and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031336A (en) * | 2010-11-29 | 2011-04-27 | 湖南斯瑞摩科技有限公司 | Particle magnesium desulfurizer/particle magnesium alloy desulfurizer based on magnesium, magnesium alloy and waste materials thereof and preparation method |
| CN102248172A (en) * | 2010-05-18 | 2011-11-23 | 辽宁丰华有色金属集团有限公司 | Method for producing coating particle magnesium |
| CN102888493A (en) * | 2011-07-18 | 2013-01-23 | 江苏正达炉料有限公司 | Preparation method of passivation magnesium |
| CN102108431B (en) * | 2009-12-24 | 2013-06-05 | 营口东邦冶金设备耐材有限公司 | Composite-coating granular magnesium desulfurizer |
| CN114277209A (en) * | 2021-12-27 | 2022-04-05 | 江苏正达炉料有限公司 | Preparation method of passivated granular magnesium |
| CN115612788A (en) * | 2021-07-13 | 2023-01-17 | 郑州富斯鼎新材料有限公司 | Slag remover for steel casting and preparation method thereof |
-
2008
- 2008-06-02 CN CN200810031429A patent/CN100588721C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108431B (en) * | 2009-12-24 | 2013-06-05 | 营口东邦冶金设备耐材有限公司 | Composite-coating granular magnesium desulfurizer |
| CN102248172A (en) * | 2010-05-18 | 2011-11-23 | 辽宁丰华有色金属集团有限公司 | Method for producing coating particle magnesium |
| CN102031336A (en) * | 2010-11-29 | 2011-04-27 | 湖南斯瑞摩科技有限公司 | Particle magnesium desulfurizer/particle magnesium alloy desulfurizer based on magnesium, magnesium alloy and waste materials thereof and preparation method |
| CN102031336B (en) * | 2010-11-29 | 2012-06-20 | 湖南斯瑞摩科技有限公司 | Particle magnesium desulfurizer/particle magnesium alloy desulfurizer based on magnesium, magnesium alloy and waste materials thereof and preparation method |
| CN102888493A (en) * | 2011-07-18 | 2013-01-23 | 江苏正达炉料有限公司 | Preparation method of passivation magnesium |
| CN115612788A (en) * | 2021-07-13 | 2023-01-17 | 郑州富斯鼎新材料有限公司 | Slag remover for steel casting and preparation method thereof |
| CN114277209A (en) * | 2021-12-27 | 2022-04-05 | 江苏正达炉料有限公司 | Preparation method of passivated granular magnesium |
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| Publication number | Publication date |
|---|---|
| CN100588721C (en) | 2010-02-10 |
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