求翻译：在油酸钠体系中，除石英外，磁铁矿、赤铁矿、菱铁矿、白云石在一定的pH值范围内均具有较好的可浮性。-104+74μm、-74+43μm最适合浮选，-18μm粒级的矿物可浮性是最差的。是什么意思？

Sodium oleate system, in addition to quartz, magnetite, hematite, siderite, dolomite within a certain range of ph value were better floating. -104 +74 Μm, -74 +43 μm for flotation-18μm grain size mineral floatability is the worst.

In the oil in the system of sodium hyaluronate, quartz, magnetite, Mitsubishi-grained hematite that iron ore, dolomite, and at a certain value range pH has a better can float. - + 74 104 - 74 µm, 43 µM + the most suitable for flotation, and -18 µm particles of the mineral can float level, is the wor

In the sodium oleate system, besides the quartz, the magnetite, the hematite, the siderite, the dolomite has the good floatability in certain pH value scope.-104+74 μm, - 74+43 μm most suits the flotation process, - 18μm the grade mineral floatability is worst.

In the system of sodium oleate, not including quartz, magnetite, hematite, siderite and dolomite are good within a certain range of pH values of float. -104+74 μ m, -74+43 μ m is best for flotation,-size-18 μ m floatability of minerals are the worst.

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