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Method for preparing inorganic mineral polymers through lead and zinc mine tailings

A technology of inorganic minerals and polymers, applied in the direction of cement production, etc., can solve the problems of tailings pollution and difficulty in utilization, and achieve the effects of short calcination time, improved activation degree, and low calcination temperature

Inactive Publication Date: 2014-08-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at problems such as tailings pollution and difficulty in utilization, the purpose of the present invention is to provide a method for preparing inorganic mineral polymers from lead-zinc tailings. The activity of the lead-zinc tailings is stimulated by activation treatment, and then a series of Inorganic mineral polymers are finally obtained after treatment, and the obtained inorganic mineral polymers have excellent qualities such as good durability, good sound insulation effect, and good heat insulation performance.

Method used

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  • Method for preparing inorganic mineral polymers through lead and zinc mine tailings
  • Method for preparing inorganic mineral polymers through lead and zinc mine tailings
  • Method for preparing inorganic mineral polymers through lead and zinc mine tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The lead-zinc tailings that the embodiment of the present invention adopts comes from Fujian Jindong mining industry, and main component is SiO 2 38.49%, Fe 2 o 3 19.86%, CaO 14.51%, SO 3 12.62, Al 2 o 3 5.14%, MnO 4.10%, MgO 3.41%;

[0031] The metakaolin used in the embodiments of the present invention has a whiteness value of 90-95%, a loss on ignition <0.25%, a pH value of 6-7, a water content of ≤0.3%, and a residue of 325 mesh <0.4%;

[0032] The modulus of the sodium silicate solution that the embodiment of the present invention adopts is 2.8, Na 2 O content is 11.6%, SiO 2 The content is 39.8%;

[0033] The NaOH used in the embodiments of the present invention is an analytically pure reagent, a white flaky solid with a solid content of not less than 96%;

[0034] The main equipment used in the embodiment of the present invention is a high-temperature resistance furnace, an electric blast drying oven, an electronic hydraulic pressure testing machine, ...

Embodiment 2

[0045] The inorganic mineral polymer prepared in Example 1 is mixed with 2.25g sodium lauryl sulfate and 1g stearic acid, poured into the test mold immediately, the mixture expands immediately, and the expansion ends within 10 minutes, followed by exotherm after 25 minutes The reaction starts to harden, and it is formed after 60 minutes. After 24 hours, it is demoulded, and then put into a curing box for curing. After 28 days, it is taken out to obtain a foamed inorganic mineral polymer test piece.

[0046] After testing, the strength of the foamed inorganic mineral polymer test block in this embodiment can reach up to 3.5MPa, and the thermal conductivity can reach 0.056w / m??k. The foamed inorganic mineral polymer test piece of this example was dried at 100°C for 1 hour, and the test piece was intact; then the test piece was calcined at 500°C and 1000°C for 2 hours, although a little Cracking, volume shrinkage and mass change rate are larger than those at 500°C, but there is n...

Embodiment 3

[0048] The inorganic mineral polymer prepared in Example 1 is mixed with 22.5g of hydrogen peroxide, 2g of polyvinyl alcohol and 6g of deionized water and then poured into the test mold. After expansion molding, the mold is demoulded in 24 hours, and then put into the curing box for curing. After 28 days Take out and obtain the foamed inorganic mineral polymer test piece.

[0049] The foaming principle of hydrogen peroxide is as follows:

[0050] 2H 2 o 2 ﹦2H 2 O+O 2 ↑;

[0051] Polyvinyl alcohol can act as a surfactant in the system, which can make the gas produced by hydrogen peroxide better contact the slurry and maintain a good pore structure; the water flux of the porous material prepared without deionized water is 0, judging that hydrogen peroxide can only form independent closed pores, and adding deionized water can create small interconnected pores connecting these closed pores, and the size of the pores can be adjusted by adjusting the amount of deionized water a...

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Abstract

The invention discloses a method for preparing inorganic mineral polymers through lead and zinc mine tailings. The method includes the steps that activating treatment is carried out on the lead and zinc mine tailings through the wet-process alkalize calcination, alkali-activator is added for inorganic polymerization reaction after metakaolin and sand are added and stirred, the inorganic mineral polymers of a net structure are formed, and a foaming agent and a foam stabilizer can be added into the obtained inorganic mineral polymers to be further prepared into foamed inorganic mineral polymers. The obtained finished inorganic mineral polymers are good in durability, have good high temperature heat insulating property, will not release poisonous substances even when exposed in flame, and can be used for backfill and sealing after a mine is mined, building materials and other aspects. Not only can the stacking problem of the lead and zinc mine tailings be effectively solved and environmental pollution be reduced, but also a new path is developed for developing and utilizing waste lead and zinc mine tailings in China, a new exploration direction is provided for relevant research on recycling of tailings, and the method has a great significance to energy conservation, emission reduction, environmental protection, waste utilization and creation of the environment-friendly society.

Description

technical field [0001] The invention belongs to the field of resource recycling, and in particular relates to a method for preparing inorganic mineral polymers from lead-zinc tailings. Background technique [0002] The development of mineral resources plays an important role in the country's economic construction, but it also brings serious negative effects to the environment. For example, a large amount of solid waste such as tailings and waste rocks generated in mine development occupies land, pollutes, destroys ecological environment, causing various geological disasters. But from another point of view, tailings still contain a large number of useful components, which have high utilization value, but have not been well utilized due to technical limitations. Therefore, the rational use of tailings resources is of great significance to the sustainable development of our country. [0003] The domestic use of lead-zinc tailings is mainly to use tailings as raw materials for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147
CPCY02P40/10
Inventor 印万忠曹阳王少怀
Owner FUZHOU UNIV
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