You should use about 0.25 to 0.5 tablespoons of dolomite lime per liter of soil.
Using a fine powdered dolomite, 2.5 - 5 Tablespoons for a 10L planter, for example, would be an approximate dosage range.
However, the exact amount can vary depending on the starting pH of your soil and the target pH you wish to achieve. In most cases, dolomite lime will not raise pH beyond 6.5-7.0 ph in soil but too much can upset the calcium to magnesium ratio in the soil. Over abundance of calcium will lockout most other minerals.
The amount of magnesium and calcium present in "Dolomite" makes it a good source of minerals without driving up the pH to a point where its out of range. Just be careful not to use too much.