Hard to say it. China has plenty of iron ore inventory right now, probably equivalent to 9 months of import from Brazil. The steel market is sliding and lot of plants are cutting output. It's called post Olympic contraction.
Brazil ore accounts for about 22% of Chinese import, or about 12% of overall consumption. They really don't have to yield in short term.
The steel market is the key. If the steel price is good, everybody can be happy. Otherwise, everybody wants to squeeze the profit from other parties in the chain, especially the shippers.