A kind of fire-free permeable brick with fine mud tailings and its preparation method
A technology of permeable bricks and fine-grained tailings, which is applied in the field of solid waste recycling, can solve problems such as environmental hazards and the inability to effectively utilize fine-grained tailings, achieve excellent water permeability and mechanical properties, and solve environmental problems and mine safety problem effect
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[0046] The preparation process of the fine mud tailings solid waste burn-free permeable brick comprises the following steps:
[0047] Step 1. Granulation treatment
[0048] The fine-grained tailings, tailings curing agent and polymer emulsion or solution are mixed and granulated to obtain granulated tailings, wherein the mass fraction of fine-grained tailings is 75-85%, and the mass fraction of tailings curing agent The fraction is 15-25%, and the high molecular polymer emulsion or solution is 15-25% externally, which accounts for 15-25% of the sum of fine-grained tailings and tailings curing agent in the batching.
[0049] The fine-grained tailings mentioned above are produced after beneficiation of iron ore fine-grained tailings, gold ore fine-grained tailings, and copper ore fine-grained tailings, and among the fine-grained tailings, tailings with a particle size below -300 mesh account for more than 70%. The above-mentioned tailings curing agent is a persulfate slag cemen...
Embodiment 1
[0066] combine image 3 , the preparation process of the fine mud tailings solid waste burn-free permeable bricks in this embodiment includes the following steps:
[0067] (1) Tailings can be granulated and modified ingredients
[0068] The raw materials used for the fine tailings particles in this embodiment to be granulated and modified are: fine tailings, tailings curing agent, polymer solution, the mass fraction of fine tailings in the batching, 75%; tailings The mass fraction of the ore curing agent is 25%; the high molecular polymer solution is 15% externally mixed, which accounts for 15% of the sum of the mass of the fine-grained tailings and the tailings curing agent in the batching.
[0069] Specifically, the fine-grained tailings of the present embodiment are hematite (red ore) fine-grained tailings, and tailings with a particle size below -300 mesh in the tailings account for 90%; the tailings curing agent of the present embodiment is persulfuric acid Salt slag ce...
Embodiment 2
[0078] combine figure 1 , the preparation process of the fine mud tailings solid waste burn-free permeable bricks in this embodiment includes the following steps:
[0079] (1) Tailings can be granulated and modified ingredients
[0080] The raw materials used for granulating and modifying the fine tailings particles in this embodiment are: fine tailings, tailings curing agent, high molecular polymer solution, the mass fraction of fine tailings in the batching, 80%; tailings The mass fraction of the ore curing agent is 20%; the high molecular polymer PEG solution is 20% externally added, which accounts for 20% of the sum of the mass of the fine-grained tailings and the tailings curing agent in the batching.
[0081] The fine-grained tailings of the present embodiment are copper tailings, and in the copper tailings, tailings with particle sizes below -300 mesh account for 90%; the tailings solidifying agent of the present embodiment is persulfate slag cement, and the sulfate wh...
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Abstract
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