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Potassium-salt-ore filling material capable of being pumped at long distance and preparation method of filling material

A long-distance, potash mine technology, applied in the fields of filling, mining equipment, earthwork drilling, etc., can solve problems such as the change of the flow performance of the filling material with time, achieve good economic and social benefits, save costs, The effect of reducing economic pressure

Active Publication Date: 2018-01-16
SINO AGRI INT POTASH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the evaluation index of filling materials in existing patents is only compressive strength, and does not mention the change of flow properties of filling materials over time, and then takes into account the specific changes in the actual pumping or self-flowing performance of filling materials, and In the present invention, it mainly introduces that the bulk solid waste steel slag is mainly used, and a small amount of calcined dolomite powder is added as a composite cement to prepare the filling material. By measuring the change data of the flow expansion degree value and the consistency value of the filling material over time, and Considering factors such as the extension of the downhole pumping distance, the method of preparing filling materials with a longer setting time without adding retarders

Method used

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  • Potassium-salt-ore filling material capable of being pumped at long distance and preparation method of filling material
  • Potassium-salt-ore filling material capable of being pumped at long distance and preparation method of filling material
  • Potassium-salt-ore filling material capable of being pumped at long distance and preparation method of filling material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Activate the steel slag and dolomite with a moisture content below 1%, and grind the steel slag to a specific surface area of ​​460m 2 / kg, the calcination condition of dolomite is calcination temperature 1000 ℃, holding time 8h, the calcined dolomite is ground to -100 mesh content 50%, the steel slag powder and dolomite are mixed evenly according to the ratio of 4:1, obtained cement. After sieving and grinding, the tail salt aggregate has two particle size ranges of +2.5mm and -2.5mm, the weight ratio is 1:1, and the fineness of the fine powder is -100 mesh, accounting for 50%. Under the condition that the amount of cement is 10%, the filling materials with solid concentrations of 70%, 72%, and 75% are configured respectively, and the measured performance parameters are shown in Table 1.

[0029] Main performance indicators of potassium salt ore filling material in Table 1 Example 1

[0030]

Embodiment 2

[0032] The steel slag, fly ash, and blast furnace slag with a moisture content below 1% are mechanically ground and activated in equal proportions, and are respectively ground to a specific surface area of ​​460m 2 / kg, the calcining condition of dolomite is calcining temperature 1000 ℃, holding time 8h, the dolomite after calcining is ground to -100 mesh content 50%, steel slag powder, fly ash, slag, dolomite are pressed 1.9:1.9: Mix evenly at a ratio of 1.9:1 to make a cement. After sieving and grinding, the tail salt aggregate has two particle size ranges of +2.5mm and -2.5mm, the weight ratio is 1:1, and the fineness of the fine powder is -100 mesh, accounting for 50%. Under the condition that the amount of cement is 10%, the fillers with solid concentrations of 70%, 72%, 75%, and 77% are prepared respectively. The measured performance parameters are shown in Table 2.

[0033] Potash salt ore filling main performance index in table 2 embodiment 2

[0034]

Embodiment 3

[0036] The steel slag, calcium carbide slag, and red mud with a moisture content below 1% are mechanically ground and activated at a ratio of 4:1:1, and are respectively ground to a specific surface area of ​​500m 2 / kg, the calcination conditions of light-burned magnesia are calcination temperature 600°C, holding time 10h, the calcined magnesia is ground to -100 mesh content 50%, steel slag powder, carbide slag, red mud, light-burned magnesia are pressed The ratio of 4:1:1:1.5 is mixed evenly to prepare the cement. After sieving and grinding, the tail salt aggregate has two particle size ranges of +2.5mm and -2.5mm, the weight ratio is 1:1, and the fineness of the fine powder is -100 mesh, accounting for 50%. When the total amount of composite cement is 7.5%, 5%, and 2.5%, they are respectively configured as filling materials with solid concentrations of 70% and 75%. The measured performance parameters are shown in Table 3.

[0037] Key performance indicators of potassium s...

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Abstract

The invention discloses a potassium-salt-ore filling material capable of being pumped at a long distance and a preparation method of the filling material, and belongs to the field of environmental protection engineering as well as the field of mining engineering. The preparation method is characterized in that one or more selected from steel slag, fly ash, calcium carbide slag, red mud, blast furnace slag, alkaline slag, granulated electric furnace phosphorus slag and granulated ferrochrome slag is / are activated; mixing are performed with one or more selected from activated calcined dolomite powder, lime powder, light calcined magnesia powder, calcium hydroxide and magnesium cement powder to prepare a composite cementing agent; potassium-salt-ore tailings subjected to partial grinding treatment are used as aggregates; and tail liquid in a potassium-salt-ore tailing pond is adopted to replace water to prepare the filling material. The potassium-salt-ore underground filling material canbe prepared by uniformly stirring 2-15% by weight of the composite cementing agent, 40-70% by weight of the tailing aggregates subjected to particle level treatment and 20-40% by weight of the tail liquid. According to the method provided by the invention, solid wastes such as potassium-salt-ore tail salts, tail liquids and the like which are difficult to comprehensively utilize at present can bemassively utilized, so that the problem that the cement cementing filling cost is high can be solved while the land resources are saved.

Description

technical field [0001] The invention belongs to the field of mining engineering, and particularly relates to an industrial solid waste such as solid waste steel slag, dolomite, potash mine tailing salt, potash mine tailing liquid and the like to produce potash mine filling material. Background technique [0002] With the full development and utilization of mineral resources, on the one hand, it has greatly promoted the development of our country's social economy, but on the other hand, it has caused problems such as environmental pollution. In mines with complex beneficiation process and high beneficiation ratio, tailings discharge, stockpiling and wastewater treatment have become even more difficult problems. In a society where economic development and environmental protection go hand in hand, there is an urgent need for a new method and new technology to achieve a balance between development and environmental protection. In recent years, due to the need to maintain the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32E21F15/00
Inventor 王全金荣振张滨王雪王传锋倪文赵柯马旭明
Owner SINO AGRI INT POTASH CO LTD
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