Preparation method of lead-zinc ore tailing sand filling body cementing material

A technology of tailings sand and lead-zinc ore, which is applied in the field of mine filling, can solve the problems of long coagulation time, short coagulation time and high strength, and achieve the effect of improving various performances

Active Publication Date: 2020-05-08
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High concentration, poor fluidity, but short coagulation time, high strength after coagulation; low concentration, good fluidity, but long coagulation time, low strength after coagulation
This contradictory problem is the pain point of the current lead-zinc tailings ultra-fine tailings sand backfill slurry preparation, and it is also a difficulty that needs to be solved urgently

Method used

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  • Preparation method of lead-zinc ore tailing sand filling body cementing material
  • Preparation method of lead-zinc ore tailing sand filling body cementing material
  • Preparation method of lead-zinc ore tailing sand filling body cementing material

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Experimental program
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Effect test

Embodiment

[0082] 1. POSS spray treatment

[0083] Use a cyclone classifier to divide the tailings produced by mineral processing into two types of tailings: one is tailings sand (CT: coarse tailings) with 50% of particles larger than 100 μm; the other is tailings powder with more than 50% of particles smaller than 100 μm (FT: finetailings). The tailings powder less than 100 μm obtained in the second part is used as ultrafine tailings sand.

[0084] After testing, the XRF analysis results of the main oxide components of the selected ultra-fine tailings sand are shown in Table 2.

[0085] Table 2 Composition of tailings sand

[0086] Oxide MgO Al 2 o 3

SiO 2

SO 3

CaO Fe 2 o 3

loss Content (wt%) 2.69 4.88 20.11 8.66 28.41 5.68 27.61

[0087] It can be seen from Table 2 that the oxide composition of tailings sand is also mainly Al 2 o 3 , SiO 2 , CaO, Fe 2 o 3 and SO 3 , higher loss on ignition. The phase analysis of the t...

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Abstract

The invention discloses a preparation method of a lead-zinc ore tailing sand filling body cementing material. The preparation method of the lead-zinc ore tailing sand filling body cementing material comprises the following steps: 1) spraying a polyhedral oligomeric silsesquioxane solution onto lead-zinc ore tailing sands with the particle size of below 100 [mu]m, and then precipitating to obtain modified tailing sands; and 2) mixing the modified tailing sands, cement, a polycarboxylate admixture and water to prepare the lead-zinc ore tailing sand filling body cementing material. The treatmentmethod ensures the good fluidity of the lead-zinc ore superfine tailing sand filling body cementing material, and effectively controls the setting time of a filling body, and the strength of the set filling body can also meet the filling requirement.

Description

technical field [0001] The invention relates to the technical field of mine filling, in particular to a preparation method of a gelling material for a lead-zinc ore tailings sand filling body. Background technique [0002] In my country, although the types of metal mineral resources are relatively complete, 80% of them are low-grade ores and associated ores, and a large amount of tailings will be generated during the mining process. Metal mine tailings are mostly secondary resources containing trace metal minerals and a large amount of non-metallic minerals. The characteristics of metal mine tailings are small particles, large quantities, residual trace metal minerals and even some harmful components. In my country, the average grade of the most widely used iron ore is less than 30%, and the remaining 70% will become tailings; and lead, zinc and other minerals will also produce more than 90% of tailings after the mineral processing process mine. The large and continuous acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B28/04
CPCC04B20/1051C04B28/04C04B2111/00017C04B2111/00724C04B2201/50C04B18/12C04B24/2694
Inventor 李鹏龚炜庭齐泽心
Owner WUHAN UNIV OF TECH
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