Production Kiln

[Mark C.]

When mixing glaze use a given measurement to weigh the glaze (mixed with water) to get the same results every batch. I use a plastic cylinder with milliliters on a gram scale (digital)

This is basic glaze making . This also gives you consistent results 

[Babs]

Back to John Britt.

Specific gravity methods this time:-))

Hoe you are improving.

[Ilya]

Hello! Please tell me what the ratio of gas / air is necessary to create an oxidizing or reducing environment in the kiln? PL7-APG burners from Sacmi Forni

[Bill Kielb]

@Ilya Oxidation
For natural gas it’s generally 10:1. Stoichiometrically it’s 9.4  cu. ft. of air to 1 cu. ft. of gas. This generally results in about 3% excess air for safety. In a Venturi burner this is very generally 50% primary air and 50% secondary air. This is very tough to measure and if this is a test question for your class then your instructor may be expecting what has been presented and could require general explanation about cu. ft. Of gas through the burner to produce “X” btuh and therefore how many cu. ft. of gas and air do we expect given a specific orifice size.

If this is a production kiln environment then there  should be charts or burner curves relating the gas pressure and percent output as well as potentially the relative firing environment (Oxidation / Reduction) for those burners, that kiln, at specific settings.

Can you provide more context to what you are intending to do and what you are trying to calculate?