JC/T 925-2003 Sintered AZS bricks for glass kilns

Sintered bricks for glass kilns AZS Bricks

1 Scope

This standard specifies the grades, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificates of sintered bricks for glass kilns. AZS This standard applies to sintered bricks for glass kilns.

Bricks AZS Normative references

2 The clauses of the following documents become clauses of this standard through reference in this standard. For dated reference documents, only the edition cited applies. For undated reference documents, the latest edition of the referenced document (including any amendments) applies.

GB/T 2997-2000 Test methods for bulk density, apparent porosity and true porosity of dense shaped refractory products ( GB/T 4984 Chemical analysis methods for fused alumina refractory materials ) GB/T 5072 Test methods for compressive strength at room temperature of dense shaped refractory products

YB/T 3701995 Test method for refractories load softening temperature Non-differential temperature rise method

GB/T 7321-1987 Sampling regulations for testing of dense shaped refractory products GB/T 10325-2001 Acceptance rules for sampling of shaped refractory products

GB/T 10326–2001 Inspection methods for dimensions, appearance and section of refractory products GB/T 16546-1996 Packaging, marking, transportation and storage of shaped refractory products

JC/T 639–1996 Test method for gas bubble evolution rate of refractory materials for glass kilns JC/T 805-1987(1996) Test method for corrosion resistance of refractory materials for glass melting furnaces under static conditions  ( JC/T 808-1987(1996) Test method for alkali resistance of aluminosilicate refractory castables )

YB/T 376.1-1995 Test method for thermal shock resistance of refractory products (water quenching method) 3 Classification

Products are divided into AZS16 and AZS32 according to the range of zirconia content. Three grades

4 Technical requirements 4.1 The physicochemical properties of the products shall conform to the provisions of Table 1.

4.2 The dimensional tolerances and appearance of the products shall conform to the provisions of Table 2. Table 1 Physicochemical indicators of products

Item Index

Chemical composition ZrO

Fe O

≤0.5 Physical properties )

Bulk density, g/cm

≥2.70 ≥2.80 、AZS20、 ≤23.20 Apparent porosity %

Compressive strength, MPa

Load softening temperature, T

(℃)

5 Test Methods

5.1 Sample preparation shall be carried out according to the provisions of GB/T 7321.

5.2 Chemical composition shall be tested according to the provisions of GB/T 4984.

5.3 Bulk density and apparent porosity shall be tested according to the provisions of GB/T 2997.

5.4 Compressive strength shall be tested according to the provisions of GB/T 5072.

5.5 Load softening temperature shall be tested according to the provisions of YB/T 370.

5.6 Thermal shock resistance shall be tested according to the provisions of YB/T 376.1.

5.7 Bubble precipitation rate shall be tested according to the provisions of JC/T 639.

5.8 Resistance to glass liquid erosion shall be tested according to the provisions of JC/T 805.

5.9 Alkali resistance shall be tested according to the provisions of JC/T 808.

5.10 Dimensional deviation and appearance quality of products shall be tested according to the provisions of GB/T 10326.

6 Inspection Rules

6.1 Bricks are batched in batches of 50 tons. Batches less than 50 tons are batched according to the actual quantity.

6.2 Sampling and acceptance shall be carried out according to GB/T 10325. When the sample is a special-shaped product, the sample for the thermal shock stability test in the destructive test shall be selected from the straight standard bricks of the same material.

6.3 The sampling plan for size and appearance shall be carried out according to the provisions of Table 3. Let y be the number of non-conforming items in the sample size (n). If y≤c, the entire batch of products is a qualified batch; if y>c, the entire batch of products is a non-conforming batch.

6.4 Samples for destructive testing shall be drawn from samples that have passed the appearance inspection. Chemical composition, bulk density, apparent porosity, room temperature compressive strength, and load softening starting temperature are the assessment indicators, and their average values shall meet the provisions of Table 1. If any item fails the first inspection, a reinspection is allowed for that item. During the reinspection, a double quantity of test samples can be randomly selected from the batch of products for reinspection of the non-conforming items. If the average value meets the requirements of Table 1, it is judged as a qualified batch; otherwise, it is judged as a non-conforming batch.

7 Packaging, Marking, Transportation, Storage and Quality Certificate

7.1 Marking, packaging, transportation and storage shall be carried out according to GB/T 16546.

7.2 A quality certificate shall be attached when the bricks leave the factory. The quality certificate shall include: supplier name, demander name, contract number, production date, product name, standard number, brand, batch number, size, appearance and physicochemical indicators, etc.

Sintered AZS bricks for glass kilns

1 Range

This standard specifies the grades, technical requirements, test methods, inspection rules and marks, packaging, transportation and storage and quality certificates of sintered AZS bricks for glass kilns.

This standard is applicable to sintered AZS bricks for glass kilns.

2 Normative reference documents

The terms in the following documents become terms of this Standard by reference to this Standard. All subsequent amendments (excluding errata) or revisions to dated citations are not applicable to this Standard; however, parties to an agreement under this Standard are encouraged to explore the use of the most recent version of these documents. For undated references, the latest version of the document applies to this standard.

GB/T 2997-2000 Test method for bulk density, apparent porosity and true porosity of dense shaped refractory products

GB/T 4984 Hao corundum refractory chemical analysis method

GB/T 5072 formized refractory products test method for compressive strength at room temperature

YB/T 3701995 Test method for Load softening temperature of refractory products (non-differential rising temperature method)

GB/T 7321-1987 Dense shaped refractory products test sample preparation requirements

GB/T 10325-2001 Rules for sampling acceptance of shaped refractory products

GB/T 10326–2001 Method for inspection of size, appearance and section of refractory products

GB/T 16546-1996 Packaging, marking, transportation and storage of shaped refractory products

JC/T 639–1996 Test method for bubble precipitation rate of refractory materials for glass kilns

JC/T 805-1987(1996) Test method for resistance to liquid glass attack under static conditions of refractories used in glass melting kilns

JC/T 808-1987(1996) Test method for alkali resistance of silica-alumina refractory castables

YB/T 376.1-1995 Test method for thermal shock resistance of refractory products “Water quench cooling method”

3 Categories

Products are divided into AZS16, AZS20, AZS32 three grades according to the oxidation error content range

4 Technical Requirements

4.1 The physical and chemical properties of the product shall comply with the provisions of Table 1.

4.2 The permissible size deviation and appearance of the product shall comply with the provisions of Table 2.

5 Test methods

5.1 Sample preparation shall be carried out according to GB/T 7321.

5.2 Chemical composition shall be tested according to GB/T 4984.

5.3 Bulk density and apparent porosity shall be tested according to GB/T 2997.

5.4 The compressive strength shall be tested according to GB/T 5072.

5.5 The load softening temperature shall be tested according to YB/T 370.

5.6 Thermal shock stability shall be tested according to YB/T 376.1.

5.7 The bubble precipitation rate shall be tested according to JC/T 639.

5.8 Resistance to liquid glass erosion shall be tested according to JC/T 805.

5.9 Alkaline resistance shall be tested according to JC/T 808.

5.10 The dimensional deviation and appearance quality of the product shall be inspected according to the provisions of GB/T 10326.

6 Inspection Rules

6.1 Bricks shall be made in batches of 50 tons, and those less than 50 tons shall be made in batches according to the actual quantity.

6.2 Sampling and acceptance shall be carried out according to GB/T 10325. When the sample is a deformed product, the sample of thermal shock stability test in destructive inspection shall be selected from the straight standard brick of the same material.

6.3 The sampling scheme for dimensions and appearance is carried out as specified in Table 3. Set the number of unqualified in sample size (n) as y, if y≤c, the whole batch of products is qualified; If y>c, the whole batch of products is unqualified.

6.4 Samples for destructive inspection shall be selected from samples qualified for appearance inspection. Chemical composition, bulk density, apparent porosity, compressive strength at room temperature, and initial temperature of softening under load shall be the assessment indicators, and their average indicators shall comply with the provisions of Table 1. If there are unqualified items in the first inspection, it is allowed to re-inspect the item. During the re-inspection, double the number of test samples can be randomly selected from the batch of products to conduct the re-inspection of the unqualified items. If the average value meets the requirements of Table 1, it is awarded as the qualified batch; otherwise, it is awarded as the unqualified batch.

7 Packing, marking, transportation, storage and quality certificate

7.1 Marking, packing, transportation and storage shall be carried out in GB/T 16546.

7.2 Bricks are delivered with a quality certificate, which shall include supplier name, demander name, contract number, production date, product name, standard number, brand number, batch number, size, appearance, physical and chemical index, etc.