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A method for producing potash ore cemented filling material by using graded tailing salt

A technology of cementing filling and potash mines, which is applied in the field of mining engineering, can solve the problems of tailing salt storage and the inability to recycle brine, and achieve the effects of improving anti-segregation ability, improving mining efficiency, and simple production methods

Active Publication Date: 2020-06-19
SINO AGRI INT POTASH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for producing potash ore cemented filling material by using graded tailing salt, aiming to use sodium chloride tailing salt and magnesium chloride brine produced in the mineral processing process of potash ore as filling material respectively Aggregate and reaction medium, so as to solve the environmental problems caused by the storage of tailing salt and the inability to recycle the brine

Method used

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  • A method for producing potash ore cemented filling material by using graded tailing salt

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Effect test

Embodiment 1

[0023] The sodium chloride content of certain tail salt is 95%, and the maximum particle size is 9mm. Dry the tail salt to a moisture content of 0.6%, sieve it with a 4mm sieve, grind the +4mm tail salt to -0.15mm to 50%, and then mix it with the -4mm tail salt evenly for bone material. The magnesium chloride content in the brine is 32.79%, the potassium chloride content is 0.58%, the sodium chloride content is 1.08%, and the calcium chloride content is 0.13%. The cementing agent is lightly calcined magnesia powder, and the calcination conditions are as follows: a calcination temperature of 600°C, a holding time of 10 hours, and the calcined magnesia is ground to a -100 mesh content of 50%. The tailing salt is mixed with the brine and cementing agent according to the proportion tailing salt: brine: cementing agent = 63%: 35%: 2% and stirred evenly to prepare potash ore cemented filling. The initial fluidity of the produced potash ore cemented filling is 220mm, the fluidity i...

Embodiment 2

[0025] The sodium chloride content of certain tail salt is 95%, and the maximum particle size is 8mm. Dry the tailing salt to a moisture content of 0.8%, use a sieve with a size of 2.5mm to sieve, grind the tailing salt of +2.5mm until the tailing salt of -0.15mm is 45%, and then mix it with the tailing salt of -2.5mm evenly Used as aggregate. The magnesium chloride content in the brine is 32.23%, the potassium chloride content is 0.55%, the sodium chloride content is 1.0%, and the calcium chloride content is 0.12%. The binder is magnesium cement powder. The tailing salt is mixed with brine and cementing agent according to the proportion of tailing salt: brine: cementing agent = 60%: 36.5%: 3.5% and stirred evenly to prepare potash ore cemented filling. The initial fluidity of the produced potash cemented filling is 210mm, the fluidity is 170mm after 1 hour, and the fluidity is 150mm after 2 hours, and the compressive strength can reach 0.92MPa after 28 days of curing.

Embodiment 3

[0027] The sodium chloride content of certain tail salt is 95%, and the maximum particle size is 9mm. Dry the tail salt to a moisture content of 0.5%, use sieves with sizes of 2.5mm and 0.63mm to sieve, grind the tail salt of -2.5mm+0.63mm to -0.15mm to 44%, and then use +2.5 mm and -0.63mm tail salt are mixed evenly and used as aggregate. The magnesium chloride content in the brine is 33.0%, the potassium chloride content is 0.5%, the sodium chloride content is 1.0%, and the calcium chloride content is 0.11%. The cement is calcined dolomite powder that has been calcined in a high-temperature gas-fired shuttle kiln at 1400°C for 8 hours and ground to a particle size of -0.15mm to 45%. The tailing salt is mixed with the brine and cementing agent according to the ratio of tailing salt: brine: cementing agent = 55%: 40%: 5% and stirred evenly to prepare potash ore cemented filler. The initial fluidity of the produced potash cemented filling is 230mm, the fluidity is 200mm after...

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Abstract

The invention provides a method for producing a potassium salt mine cemented filling material by utilizing graded tailing salt, and belongs to the technical field of mining engineering and resource comprehensive utilization. The method comprises the following main steps: drying and screening tailing salt; preparing three different grades of aggregates according to different flowability requirements, wherein a proportion control range of the tailing salt to halogen liquid to a cementing agent is that the potassium salt mine tailing salt to the halogen liquid to the cementing agent is equal to (53 percent to 74.5 percent) : (30 percent to 45 percent) : (0.5 percent to 5 percent); stirring the components in the proportion and evenly mixing to prepare the potassium salt mineral cemented filling material. By using the differently graded potassium salt mine tailing salt, the loss degree of the flowability of the filling material along with time is regulated to adapt to different conveying distances and underground filling production; after the filling material is conserved for 28 days, the compressive strength can be up to 0.5MPa to 2.0MPa. According to the method disclosed by the invention, the problems that wastes such as the potassium salt mine tailing salt and the halogen liquid are difficult to treat and comprehensive utilization is difficult are comprehensively solved; by adjusting the grading of the tailing salt, the potassium salt mine cemented filling material has better conveying performance, the segregation resistant capability of the filling material also can be improved, and the mining efficiency of filling milling is improved.

Description

technical field [0001] The invention relates to the field of mining engineering and the technical field of comprehensive utilization of resources, in particular to a method for producing potash ore cemented filler by using industrial waste such as graded tailing salt and brine as raw materials. Background technique [0002] The cemented filling generally uses crushed stone, river sand or tailing sand or Gobi aggregate as the aggregate, and is mixed with cement or lime cementing material with water to form a slurry or paste, which is transported to the filling by pipeline pumping or gravity flow. Area. The cemented filling material contains a certain proportion of cementitious materials, has high strength and integrity, and has high operational safety. It can improve the recovery rate of ore and the operating efficiency of the stope while meeting various underground support requirements. [0003] Potassium salt is mainly used to make potash fertilizer, which is one of the th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10
CPCC04B28/10C04B2111/00724C04B2201/50C04B18/12C04B22/0033
Inventor 王全金荣振张滨王雪王传锋倪文赵柯王琦
Owner SINO AGRI INT POTASH CO LTD
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