Composited desulfurizer for KR, preparation method and application thereof
A desulfurizer and surface modifier technology, applied in the field of iron and steel metallurgy and steelmaking, can solve the problems of high consumption of desulfurizers, poor slag removal effect, and low utilization rate of desulfurizers, so as to solve adverse effects, reduce the consumption of desulfurizers, The effect of reducing sulfur content
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Embodiment 1
[0038] The composite desulfurizer includes lime powder, fluorite powder and surface modifier, and its mass composition ratio is: lime powder: fluorite powder: surface modifier = 8.8:0.8:0.5. The lime powder is lime powder with a CaO content of 84%, an S content of 0.09%, and an activity of 300; the fluorite powder is a fluorite powder with a CaF2 content of 80% and an S≤0.1%; the surface modifier For polymer silane, such as Japan's MMCA:
[0039]
[0040] Where X is an alkoxysilyl group; Y is a reactive organic functional group such as an epoxy group or a hydroxyl group; Z is a group having good compatibility with organic substances such as a polyether or an alkyl group. This type of modifier can change the structure according to the needs, so that it has some unique properties. Therefore, in addition to the function of conventional silane coupling agent, it also has the function of inorganic-organic interface adhesion aid, which can endow composite materials with unique h...
Embodiment 2
[0043]Composite desulfurizer, including lime powder, fluorite powder and surface modifier, its mass composition ratio is: lime powder: fluorite powder: surface modifier=9.2:0.9:0.3. The lime powder is lime powder with a CaO content of 85%, an S content of 0.09%, and an activity of 320; the fluorite powder is a CaF2 content of 82%, and S≤0.1%; the surface modifier The acid and alkali resistant surface modifier is prepared by using the method in CN1544136 ("Preparation Method of Acid and Alkali Resistant Surface Modifier").
[0044] The preparation method of the composite desulfurizer is as follows: pre-crushing lime with a CaO content of 85%, an S content of 0.09%, and an activity degree of 320; adding a surface modifier for passivation treatment, and using a Raymond machine to process the lime To the particle size within 3mm, and complete the desulfurization agent passivation treatment in the process. Then add fluorite powder with a CaF2 content of 82% in a certain proportion...
Embodiment 3
[0046] The composite desulfurizer includes lime powder, fluorite powder and surface modifier, and its mass composition ratio is: lime powder: fluorite powder: surface modifier=9.0:1.0:0.7. The lime powder is a lime powder with a CaO content of 88%, an S content of 0.08%, and an activity of 310; the fluorite powder is a CaF2 content of 83%, and an S≤0.1% fluorite powder; the surface modifier It is a fluorine-containing silane-based surface modifier. Fluorine-containing silane-based surface modifiers can impart lubricity, water resistance, and anti-fouling properties to the surface of the material because of the introduction of different amounts of fluorine into the hydrophobic group. At the same time, they have a strong affinity for fluorine-containing resins, and are expected to be used as fluorine-containing resins. For bottom coating, such as KBM-7103, KBM-7803.
[0047] The preparation method of the composite desulfurizer is as follows: pre-crushing lime with a CaO content...
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