1. Physical and chemical indexes:

   Item/Grade	Fire clay brick				High alumina brick
   	SK-30	SK-32	SK-34	SK-35	SK-36	SK-37	SK-38	SK-40
   AL2O3% (≥)	30	35	38	45	55	65	70	82
   Fe2O3% (≤)	2.5	2.5	2.0	2.0	2.0	2.0	2.0	2.0
   Refractoriness(SK)	30	32	34	35	36	37	38	40
   Refractoriness under load, 0.2MPa, °C (≥)	1250	1300	1360	1420	1450	1480	1530	1600
   Apparent porosity (%)	22-26	20-24	20-22	18-20	20-23	20-23	20-22	18-20
   Bulk density (g/cm³)	1.9-2.0	1.95-2.1	2.1-2.2	2.15-2.22	2.25-2.4	2.3-2.5	2.4-2.6	2.5-2.7
   Cold crushing strength ,MPa (≥)	20	25	30	40	45	50	60	70

The High Pressure Resistance Fireclay Bric is comparable to that of silica bricks, up to 1690~1730℃, but the softening temperature under load is more than 200℃ lower than that of silica bricks.

In addition to the high refractory mullite crystals, the clay bricks also contain nearly half of the low melting point amorphous glass phase.

In the temperature range of 0~1000℃, the volume of High Pressure Resistance Fireclay Brick expands uniformly as the temperature rises.

The linear expansion curve is approximately a straight line, and the linear expansion rate is 0.6%~0.7%, which is only about half of that of silica bricks.

When the temperature reaches 1200 ℃ and then continue to rise, its volume will start to shrink from the maximum expansion.

The residual shrinkage of High Pressure Resistance Fireclay Brick leads to the loosening of mortar joints in masonry, which is a major disadvantage of clay bricks.

When the temperature exceeds 1200°C, the low melting point substances in the High Pressure Resistance Fireclay Brick gradually melt, and the particles are tightly pressed against each other due to surface tension, resulting in volume shrinkage.

Production practice in China has proved that before crushing, high-aluminum clinker is strictly sorted and classified, and stored in tiers.

The use of bauxite clinker and combined clay fin grinding method can improve product quality.

Competitive Advantage:

1. Competitive Price. Make the products competitive in your market.

2. Abundant Experience. Prevent cracks and twist in bricks.

3. Different Moulds. Save mould fees for you.

4. Strict Quality Control. Meet clients’ quality requirement.

5. Large stocks. Guarantee prompt delivery.

6. Professional Packing. Avoid damage and secure the goods in transportation

Features

1. as high acid resistance
2. Low water absorption
3. Oxidation at room temperature is not easy
5. High pressure resistance
6. Easy to clean
7. Strong acid and alkali corrosion resistance (parameter>99.8)
8. Convenient for installation
9. Uniform gas and liquid distribution
10. Reliable structure and chemical stability
11. Long service life, more than 3 years warranty
12. High Working temperature: 1650-1720C
13. Accurate size, small Tolerance

Zhengzhou Annec CO., Ltd. was founded in 2003, and has been a NASDAQ listed corporation since 2011 with ticker identification ANNC. Annec had become the industrial leader within China in the areas of refractory production, Engineering for hot blast stove of blast furnace, and capability for EPC project. Annec has its own Provincial Enterprise Technology Center and Top Combustion Hot Blast Stove Research Centre, Annec (Beijing) Engineering & Technology Co., Ltd and four Manufacturers for Refractories. The annual output of different type of refractories can reach 150 thousand tons, and undertaken capability of more than 10 turnkey projects for hot blast stove.

Annec is a national hi-tech company, and is accredited with ISO9001:2008 quality control system standards, ISO12001:2004 environmental control system standards, and GB/T28001-2011 HAZOPS. Annec has set up a thorough and effective management system with practical considerations for her employees and community, and is persistent in promoting employee self-value and product quality. With these efforts, Annec was awarded the prestigious 2012 Zhengzhou Mayor Quality Prize.