I suggested some edits which were rejected yesterday. Since then, I am not able to suggest anymore edits. I wonder, how can I lift this ban?
From this post on Meta.SE:
You [can be] banned from suggesting edits, either automatically because a large number of recent suggested edits by you were rejected, a moderator manually banned you, or you triggered the anonymous insta-ban filter.
It appears that you fall under the first of these categories, "a large number of recent suggested edits by you were rejected." This ban will last for seven days, after which you will be able to suggest edits again like normal.
The formula used to mete out edit bans can be found here:
When deciding on whether we should ban or not, we now look at your last 7 days of activity.
(rejects - (approvals / 3)) >= 5, you will be auto-banned.
Looking at your recent suggestions, it appears that you have 2 approved suggestions and 5 rejections. Interestingly, this doesn't fit the formula:
5-(2/3) == 4.333. Perhaps the formula has changed since 2011, when that post was made.