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A method for backfilling and reclamation of mining pits by utilizing the ore slime and red mud produced by bauxite ore dressing and smelting
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A technology of bauxite and red mud, which is applied to the slime produced by smelting, red mud backfilling and reclamation of mining pits, and the use of bauxite in the field of beneficiation 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: 2021-09-24
GUILIN UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology
[0006] There is a lack of effective disposal measures for the large stockpiles of red mud and ore mud
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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 reclamation of mine land by utilizing ore slime and red mud produced by weathering bauxite ore dressing and smelting. The material ratio is as follows by weight percentage (dry weight): 60% to 95% of ore slime, 5% to 40% of red mud, and some ferric chloride (anhydrous); Turn over and mix, age and reduce alkali, then mix with ore slime, mix evenly, and send it to the pit for landfill reclamation. The present invention follows the natural law of "where to come from and where to go", and backfills the weathered bauxite washing mud and smelting red mud into the original mine pit after alkali reduction and mixing to digest the huge amount of piles. The old red mud stored, cleared the large-scale storage of ore mud, and eliminated the high environmental risk, which not only protects the ecological environment, but also regenerates land resources, and is also conducive to the sustainable development of the bauxite industry, so that it has a good Ecological benefits, environmental benefits and sustainable economic benefits.
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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