If I'm reading fiction or something that's not too heavy, I tend to read at 800 - 1200wpm. Anything technical or with oddly shaped sentences/paragraphs slows me down to 600 - 800wpm. I'm not sure how many pages/hour that is, but I can finish off a 400 page novel in a couple of hours if I'm not distracted or interrupted.
I can only suggest what techniques work for me; I never intended to turn into a speed reader and can't recall perfectly the process of becoming one (I was mad about books as a kid/teenager and read novels very regularly from about the age of seven). But anyway, I don't subvocalise the words as I read, although I just realised I do as I write lol. I also ignore all the little words, like conjunctions and articles. My brain just seems to skip over them and focus on the nouns and verbs. Depending on the length of the paragraph (this doesn't work if it's huge), I look at the block of words and take in the order of nouns and verbs to 'see' the information being presented. That is, I don't 'read' left-to-write; it's more like observing a picture.
Also, I tend to subconsciously force myself to maintain/improve my reading speed quite frequently, by being aware of how long I'm spending on a book or article and setting a deadline for when I want to be finished then speeding up to make sure I meet it. This is a result of me not really being able to justify the time I spend reading books and articles 'for fun' instead of studying or working.