The authors suggest that 1) out-side price taxes be imposed on users of ironmineral products provided they have the capability of paying;
在铁矿产品用户有承担能力的前提下征收矿产品价外税；
2
The leaching process is controlled by mixed steps:the surface chemical reaction and the diffusion passing through the silicon and ironmineral phases.
浸出过程属于混合控制，即表面化学反应与通过不溶硅、铁矿物相的扩散为过程的控制步骤。
3
There are very high efficiency and benefits in the heavy haul railways which are suitable for large amount transport of mass bulk goods, especially for ironmineral, coal etc.