Method for backfilling reclamation mining pits by weathering type bauxite beneficiation and slurry and red mud generated by smelting

A technology of bauxite and red mud, which is applied in the field of backfilling and reclamation of mining pits with red mud, and the slime produced by smelting, and in the field of beneficiation of bauxite, which can solve the problems of lack of effective disposal measures for red mud and slime. Achieve good ecological benefits, protect the ecological environment, and control the cost of process technology

Active Publication Date: 2020-08-04
GUILIN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is a lack of effective disposal measures for the large stockpiles of red mud and ore mud

Method used

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  • Method for backfilling reclamation mining pits by weathering type bauxite beneficiation and slurry and red mud generated by smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Land reclamation of pit slime and red mud in a bauxite mining area in Pingguo County, Guangxi

[0025] (1) The raw materials are weighed according to the following weight percentage (dry weight): the proportion of ingredients is: 80% of ore slime, 19% of red mud, 0.7% of anhydrous ferric chloride, and 0.3% of gypsum; the pit volume is 5000m 3 , the total material weight (dry weight) is about 9,000 tons; material quality: 13,100 tons of ore slime with a moisture content of 45%, 2,445 tons of red mud with a moisture content of 30%, and 57 tons of anhydrous ferric chloride (powder, purity 98%) , 24.5 tons of 180 mesh gypsum powder (moisture content 2%).

[0026] (2) Use a forklift to level a piece of 30ⅹ30m in the red mud yard 2 The site is used as a place for mixing, stacking and aging red mud to reduce alkali. The specific alkali reduction and mixing steps are as follows: ①Take the load capacity of the transport vehicle in the red mud yard as the basic unit ...

Embodiment 2

[0028] Example 2: Land reclamation of pit slime and red mud in a bauxite mining area in Baise City, Guangxi

[0029] (1) The raw materials are weighed according to the following weight percentage (dry weight): the proportion of ingredients is: 85% of ore slime, 14.1% of red mud, 0.6% of anhydrous ferric chloride, and 0.3% of gypsum; the pit volume is 10000m 3 , the total weight of the material (dry weight) is about 18,000 tons; the quality of the material: 28,333 tons of ore slime with a moisture content of 44%, 3,626 tons of red mud with a moisture content of 30%, and 108 tons of anhydrous ferric chloride (powder, purity 96%) , 54 tons of 180 mesh gypsum powder (moisture content 2%).

[0030] (2) Use a forklift to level a piece of 40ⅹ40m in the red mud yard 2 The site is used as a place for mixing, stacking and aging red mud to reduce alkali. The specific alkali reduction and mixing steps are as follows: ①Take the load capacity of the transport vehicle in the red mud yard a...

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Abstract

The invention discloses a method for backfilling mining pits and mine land reclamation by weathering type bauxite beneficiation and slurry and red mud generated by smelting. Materials are matched according to the following weight percentage (by dry weight): 60%-95% of a slurry, 5%-40% of red mud and a plurality of ferric trichloride (anhydrous); and after the red mud is subjected to mixed stacking, turning and blending and ageing and alkali reduction with ferric trichloride powder, and then the red mud is mixed and blended with the slurry and to be fed to the mining pits for landfilling reclamation. According to the method for backfilling the mining pits and mine land reclamation by the weathering type bauxite beneficiation and slurry and red mud generated by smelting, a natural law of ''where come from and where go back'' is followed, the weathering type bauxite ore washing slurry and the smelting red mud are backfilled into the original mining pits after alkali reduction and blending, old red mud with huge stockpile is digested, a slurry library with large-scale storage is emptied, the hanging environment risk is excluded, the ecological environment is protected, land resources are regenerated, and the sustainable development of a bauxite industry is further facilitated, so that the bauxite industry has good ecological benefits, environment benefits and sustainable economicalbenefits.

Description

technical field [0001] The invention relates to the field of reclamation of weathered bauxite mines, in particular to a method for backfilling and reclamation of mining pits by utilizing ore slime and red mud produced by bauxite ore dressing and smelting. Background technique [0002] Aluminum is the non-ferrous metal with the largest output, and its correlation with the national economy is as high as 91%. A large amount of solid waste such as red mud and beneficiation mud will be generated in the alumina production process. [0003] Red mud has the characteristics of strong alkalinity, high salt content, difficult comprehensive utilization, and high risk of pollutant migration. In recent years, there have been many groundwater and surface water pollution accidents caused by red mud stockpiles in many places in my country. Red mud disposal has become a common problem faced by the international alumina industry. [0004] Bauxite is mostly distributed in karst areas, the ec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00C09K17/02A01B79/00A01B79/02
CPCA01B79/00A01B79/02C09K17/02C09K2101/00E21F15/005
Inventor 成官文解庆林熊林吴海文黎枝肖张正林陈占刚
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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