The tap hole is the channel through which the blast furnace tap water passes. Due to the different needs of customers, the refractory materials used in the tap hole are refractory castable and refractory ramming material. The castable used for blast furnace tap hole is aluminum silicon carbide carbon castable, referred to as ASC castable for short. What are the factors that affect the castable price of the blast furnace tap hole?

1. Raw material of castable for the cast iron ditch:

The castable for the cast iron ditch is aluminum silicon carbide carbon castable. The fire-resistant raw materials used are fused corundum or sintered corundum, silicon carbide and raw materials containing carbonaceous components. The ultra-fine powder and composite additives are added. The castable is prepared and evenly mixed according to the formula. When in use, the binder is added to mix the castable with low porosity, dense structure, high strength, erosion resistance, oxidation resistance and high temperature environment Refractory castable with good volume stability and high iron content.

2. Index of castable in the cast ditch:

Different customer needs have different requirements on the castable index of the cast iron ditch. According to the customer's demand, the manufacturer can process the castable with different indexes.

3. Grade of castable for the cast ditch:

As we all know, the grades of refractories used in different environments are also different. For example, the grades of castables used in the main ditch of blast furnace and in the branch ditch and slag ditch of the ditch are different though they are all aluminum silicon carbide carbon castables.

4. Iron flow rate of castable in the tapping ditch:

The quality of the castable for the iron channel is the amount of iron passing. The higher the amount of iron passing, the more cost-effective the enterprise will spend on the castable for the iron channel. The service life of the iron trench contracted by Revo is long, and the iron throughput can reach 80000-120000 tons, which is beyond the reach of other refractory castable manufacturers.

5. Manufacturer of castable for the cast iron ditch:

Due to the different formula used by the manufacturer, the properties of the castable processed by the manufacturer are different. The direct effect is the iron flux, but the iron flux of the castable can only be detected after it is used. Therefore, when choosing the manufacturer of castable for the cast iron trench, it is better to choose the enterprise with strength, cooperation experience and data verification.

With the development of iron making enterprises, refractory materials used in the casting ditch and the casting yard are all selected for contract services. The contractor and refractory manufacturer choose the appropriate refractory materials to be used in the casting ditch or the casting yard. Professional personnel operate the castable produced by the casting material manufacturer, which has good use effect and saves time and effort.

Project Indicators		TC － 1	TC － 2	TC － 3	TC － 4	TC － 5	TC － 6
AL2O3,%		≥ 70	≥ 70	≥ 65	≥ 65	≥ 65	≥ 60
SiC+C , %		≥ 15	≥ 15	≥ 10	≥ 10	≥ 10	≥ 8
bulk density ,g/cm 3		≥ 2.80	≥ 2.80	≥ 2.70	≥ 2.70	≥ 2.60	≥ 2.50
Normal temperature compressive strength, MPa		≥ 15	≥ 15	≥ 15	≥ 15	≥ 15	≥ 15
Flexural strength ,MPa	110 ℃ × 24h	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5
	1450 ℃ × 3h	≥ 8	≥ 8	≥ 8	≥ 8	≥ 8	/
Linear rate of change，%		± 0.5	± 0.5	± 0.5	± 0.5	± 0.5	± 0.5
purpose		Main ditch	Swing groove	Branch Ditch	Slag ditch	Main trench cover	Slag trench cover