Sources

Can kodshim kalim be eaten when there is no altar? Abaye proved from a braita of Rabbi Yishmael that they cannot be eaten. Rabbi Yirmia raised a difficulty against Abaye from a contradiction between braitot, resolving it in a way that one would conclude that kodshim kalim could be eaten even without an altar. However, Ravina provides an alternative resolution to the contradiction, and the Gemara brings another.

Rav Huna says in the name of Rav that the altar in the Tabernacle of Shilo was made of stone. However, a difficulty is raised against this from a braita that explains that the fire of Moshe's copper altar continued until the time of Shlomo. They resolve it by saying that Rav Huna held by a different tannaitic opinion. Alternatively, one can explain that the fire could have still been on Moshe's altar, even though they were using the stone altar. If so, what was the fire used for? The Gemara suggests two possible answers.

A Mishna is brought which says that the altar in the time of the Second Temple was expanded to be larger than the one in the First Temple, from 28x28 cubits to 32x32. Why? Rav Yosef suggests it was expanded as they needed more space. Ravin explained it based on a Mishna in Middot that described the addition of the shitin, two holes that were added for the libations.