RU2000106115A

RU2000106115A - METHOD FOR ENSURING FIRE-RESISTANT PRODUCT PROPERTIES AND INORGANIC FIRE-RESISTANT FIBER

Info

Publication number: RU2000106115A
Application number: RU2000106115/03A
Authority: RU
Inventors: Гари Энтони ДЖАББ
Original assignee: Дзе Морган Крусибл Компани ПЛС
Priority date: 1993-01-15
Filing date: 2000-03-10
Publication date: 2002-03-20

Claims

1. The method of providing refractory properties of the product, comprising the following stages:
a) the choice of a salt-soluble inorganic fiber for which the fiber bar obtained by vacuum casting while holding for 24 hours at a temperature of 1260 ^° C has a shrink of 3.5% or less, and which includes CaO, SiO ₂ and MgO, random impurities, total the amount of which is less than 2 mol. %
and in which
i) the excess amount of SiO ₂ (defined as the calculated amount of SiO ₂ remaining after crystallization of the above components in the form of silicates) exceeds 21.8 mol. %;
ii) the amount of CaO is greater than the amount of MgO;
iii) the calculated diopside / wollastonite ratio is not in the range from the corresponding ratio for E32 to 5.25,
b) associating the salt-soluble refractory fiber in or with the product, and
c) exposing the fiber and the product to a high temperature of at least 1000 ^{° C.} for 24 hours

2. The method according to claim 1, except that the fiber further comprises ZrO ₂ and the amount of CaO is greater than the total amount of MgO plus a double amount of ZrO ₂ .

3. The method according to p. 1 or 2, in which the fiber further comprises less than 0.75 mol. % Al ₂ O ₃ .

4. The method according to p. 3, in which Al ₂ O _{3 is} present in an amount of less than 0.5 mol. %

5. The method according to any one of paragraphs. 1-4, in which random impurities include TiO ₂ in an amount of less than 1.25 mol. %, preferably less than 0.8 mol. %

6. The method according to any one of paragraphs. 1-5, in which random impurities include Na ₂ O in an amount of less than 1.0 wt. %, preferably less than 0.5 wt. %, more preferably less than 0.3 wt. %

7. The method according to any one of paragraphs. 1-6, in which random impurities include Fe ₂ O ₃ in an amount of less than 1.0 wt. %, preferably less than 0.6 wt. %

8. The method according to any one of paragraphs. 1-7, in which the fiber includes approximately mol. %:
CaO - 17.69-20.18
MgO - 7.75-17.22
ZrO ₂ - 0.32-6.19
SiO ₂ - 63.11-66.54
9. The method according to any one of paragraphs. 1-8, in which the fiber includes approximately mol. %:
CaO - 32.59-37.18
MgO - 0.88-2.92
SiO ₃ - 61.6-65.52
10. The method according to any one of paragraphs. 1-9, in which an excess amount of MgO (defined as the amount of MgO, less than the total amount of ZrO ₂ plus Al ₂ O ₃ ) exceeds 10 mol. %

11. The method according to p. 10, in which the excess amount of MgO exceeds 11.2 mol. %

12. The method according to p. 11, in which the excess amount of MgO exceeds 15.25 mol. %

13. Soluble in saline inorganic refractory fiber selected from the group of fibers having a composition, wt. % (see graphic part).