A kind of environment-friendly high-life repairing furnace sand and its production method
A production method and environment-friendly technology, which is applied in the field of refractory materials for converter protection in iron and steel smelting, can solve the problems of unsatisfactory thermal shock resistance and oxidation resistance of refractory materials, high labor intensity, and low converter furnace life. Achieve outstanding environmental protection effect, short sintering time and rapid sintering reaction
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Embodiment 1
[0054] Take the repairing sand for a 70-ton converter in a steel plant as an example. The conditions are shown in Table 2:
[0055] Table 2 Production conditions of a 70-ton converter in a steel plant
[0056]
[0057]
[0058] In order to achieve the above purpose, the furnace sand for the converter can be realized through the following technical solutions:
[0059] The 70-ton converter sand is an environmentally friendly and long-life repairing sand, which is prepared from the following raw materials in parts by weight: MS91 dead-burned magnesia: 65 parts, CARBORES F 112M carbon-containing resin powder and ultra-fine carbon black N330. Carbon source: 12 parts, pitch fiber: 0.01 parts, composite fluidizing agent composed of refined naphthalene and allyl polyoxyethylene ether: 2.5 parts, composite sintering agent composed of silicon carbide micropowder and borax: 0.2 parts, metal aluminum powder and Composite antioxidant composed of metal silicon powder: 2.0 parts.
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Embodiment 2
[0071] Take the furnace sand for 300 tons converter in a steel plant as an example. The conditions are shown in Table 3:
[0072] Table 3 Production conditions of a 300-ton converter in a steel plant
[0073] 1
Nominal capacity
210t
2
Furnace ratio
1.0m 3 / t.
3
Average tapping amount
215t
4
Maximum tapping amount
230t
5
Average smelting cycle
45min, of which pure oxygen blowing time: 15min
6
blowing mode
top and bottom blow
7
Tapping temperature
1630~1690℃
8
Final slag alkalinity
2.8~4.0
9
furnace age
10000 furnaces
10
Tapping time
4.5~8min
[0074] In order to achieve the above purpose, the furnace sand for the converter can be realized through the following technical solutions:
[0075] The 300-ton converter sand is an environmentally friendly and long-life repairing sand, which is prepared from the following raw mate...
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