"放猪肉的桶" can be translated as "the bucket for storing pork" or more naturally, "the pork storage bucket".
If you want to be more specific about the type of bucket (e.g., if it's a large, industrial-sized bucket), you might say "the large pork storage bucket" or "the industrial pork storage bucket," depending on the context.
In everyday conversation, "the pork bucket" might also be understood, though it's slightly less precise.