Low-creep azorite indecomposable overflow brick and preparation method thereof

Abstract

The invention relates to a low-creep azorite indecomposable overflow brick and a preparation method thereof. The brick comprises the following raw materials in percentage by weight: 99.40-99.85% of azorite powder and 0.15-0.60% of ilmenite powder. The product prepared by the method provided by the invention is high in volume density and extremely low in apparent porosity, significantly reduces the high-temperature bending creep rate of an azorite material, and has an extremely-low foaming index to liquid crystal glass; and the preparation method is small in added quantity of a sintering aid, does not cause decomposition of azorite during firing, is simple and easy to implement, is scientific and reasonable, and is convenient for large-scale industrial production.

Description

technical field

[0001] The invention relates to an overflow brick with low creep and no decomposition of zircon and a preparation method thereof, belonging to the technical field of refractory materials. Background technique

[0002] At present, the overflow bricks used in the manufacture of liquid crystal glass by the overflow method are all made of zircon. During use, the overflow bricks bear the weight of themselves and the glass liquid at 1000-1200 ° C, and bending creep will occur after long-term use. , which is specifically manifested in the fact that the height of the middle part of the overflow brick is reduced below the height of the support end, resulting in the inability to form a glass substrate with uniform thickness. In order to solve the problem of denser sintering of overflow bricks and further reducing the creep rate, the prior art provides various solutions.

[0003] Chinese Patent Publication No. CN1657499A discloses a creep-resistant zircon refractory ma...

Examples

Embodiment 1

[0058] The raw material zircon powder 1# includes the following components in mass percentage:

[0059] Al 2 o 3 0.39%, Fe 2 o 3 0.05%, CaO 0.02%, MgO 0.00%, K 2 O is 0.01%, Na 2 O is 0.01%, SiO 2 32.9%, TiO 2 0.12%, P 2 o 5 0.15%, ZrO 2 was 66.1%.

[0060] The raw material ilmenite powder 1# median diameter ≤ 3μm, including the following components in mass percentage: TiO 2 is 49.5wt%, FeO is 36.5wt%, Fe 2 o 3 9.8%, Al 2 o 3 1.07%, SiO 2 0.82% for CaO, 0.62% for CaO, and 0.75% for MgO.

[0061] The above-mentioned raw materials are all commercially available commodities.

[0062] The content of each raw material in this embodiment is shown in Table 1.

[0063] A method for preparing an overflow brick with low creep and zircon that does not decompose, comprising the following steps:

[0064] 1) Prepare batch materials according to zircon powder and ilmenite powder;

[0065] 2) The batch material is wet-grinded and spray-granulated to form granulated powder,...

Embodiment 2

[0072] The raw material zircon powder 1# used is the same as that in Example 1; the median diameter of the raw material ilmenite powder 2# used is ≤1 μm, and the chemical composition is TiO 2 is 51.8wt%, FeO is 38.9wt%, Fe 2 o 3 4.0%, Al 2 o 3 1.42%, SiO 2 0.92% for CaO, 0.06% for CaO, and 0.17% for MgO.

[0073] The preparation method of the zircon sintered product described in Example 2 is the same as that of Example 1, and the mass ratio of the raw materials used and the parameters in the preparation process are shown in Table 1.

Embodiment 3-12

[0074] The raw material zircon powder 2# used in embodiment 3-12 comprises the following components in mass percentage:

[0075] Al 2 o 3 0.08%, Fe 2 o 3 0.04%, CaO 0.02%, MgO 0.00%, K 2 O is 0.01%, Na 2 O is 0.01%, SiO 2 33.1%, TiO 2 0.08%, P 2 o 5 0.11%, ZrO 2 was 66.4%.

[0076] The preparation method of zirconite sintered products described in Examples 3-12 is the same as that of Example 1, the mass ratio of raw materials used in Examples 2-7, and the parameters in the preparation process are shown in Table 1; The ratio of raw materials and the parameters in the preparation process are shown in Table 2.

[0077] The detection method in Examples 2-12 is the same as that in Example 1, and the detection data of Examples 1-7 are shown in Table 3; the detection data of Examples 8-12 are shown in Table 4.

technical field

[0001] The invention relates to an overflow brick with low creep and no decomposition of zircon and a preparation method thereof, belonging to the technical field of refractory materials. Background technique

[0002] At present, the overflow bricks used in the manufacture of liquid crystal glass by the overflow method are all made of zircon. During use, the overflow bricks bear the weight of themselves and the glass liquid at 1000-1200 ° C, and bending creep will occur after long-term use. , which is specifically manifested in the fact that the height of the middle part of the overflow brick is reduced below the height of the support end, resulting in the inability to form a glass substrate with uniform thickness. In order to solve the problem of denser sintering of overflow bricks and further reducing the creep rate, the prior art provides various solutions.

[0003] Chinese Patent Publication No. CN1657499A discloses a creep-resistant zircon refractory ma...

Examples

Embodiment 1

[0058] The raw material zircon powder 1# includes the following components in mass percentage:

[0059] Al 2 o 3 0.39%, Fe 2 o 3 0.05%, CaO 0.02%, MgO 0.00%, K 2 O is 0.01%, Na 2 O is 0.01%, SiO 2 32.9%, TiO 2 0.12%, P 2 o 5 0.15%, ZrO 2 was 66.1%.

[0060] The raw material ilmenite powder 1# median diameter ≤ 3μm, including the following components in mass percentage: TiO 2 is 49.5wt%, FeO is 36.5wt%, Fe 2 o 3 9.8%, Al 2 o 3 1.07%, SiO 2 0.82% for CaO, 0.62% for CaO, and 0.75% for MgO.

[0061] The above-mentioned raw materials are all commercially available commodities.

[0062] The content of each raw material in this embodiment is shown in Table 1.

[0063] A method for preparing an overflow brick with low creep and zircon that does not decompose, comprising the following steps:

[0064] 1) Prepare batch materials according to zircon powder and ilmenite powder;

[0065] 2) The batch material is wet-grinded and spray-granulated to form granulated powder,...

Embodiment 2

[0072] The raw material zircon powder 1# used is the same as that in Example 1; the median diameter of the raw material ilmenite powder 2# used is ≤1 μm, and the chemical composition is TiO 2 is 51.8wt%, FeO is 38.9wt%, Fe 2 o 3 4.0%, Al 2 o 3 1.42%, SiO 2 0.92% for CaO, 0.06% for CaO, and 0.17% for MgO.

[0073] The preparation method of the zircon sintered product described in Example 2 is the same as that of Example 1, and the mass ratio of the raw materials used and the parameters in the preparation process are shown in Table 1.

Embodiment 3-12

[0074] The raw material zircon powder 2# used in embodiment 3-12 comprises the following components in mass percentage:

[0075] Al 2 o 3 0.08%, Fe 2 o 3 0.04%, CaO 0.02%, MgO 0.00%, K 2 O is 0.01%, Na 2 O is 0.01%, SiO 2 33.1%, TiO 2 0.08%, P 2 o 5 0.11%, ZrO 2 was 66.4%.

[0076] The preparation method of zirconite sintered products described in Examples 3-12 is the same as that of Example 1, the mass ratio of raw materials used in Examples 2-7, and the parameters in the preparation process are shown in Table 1; The ratio of raw materials and the parameters in the preparation process are shown in Table 2.

[0077] The detection method in Examples 2-12 is the same as that in Example 1, and the detection data of Examples 1-7 are shown in Table 3; the detection data of Examples 8-12 are shown in Table 4.

Images