Nanometer zero-valent iron-loaded ceramsite and preparation method thereof

A technology of nano-zero-valent iron and ceramsite, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of high production cost, complicated preparation process and harsh technical parameters of nano-zero-valent iron , to achieve the effects of short reaction cycle, simple raw material composition and low raw material cost

Pending Publication Date: 2022-03-11
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to overcome the problems in the prior art that the preparation

Method used

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  • Nanometer zero-valent iron-loaded ceramsite and preparation method thereof
  • Nanometer zero-valent iron-loaded ceramsite and preparation method thereof
  • Nanometer zero-valent iron-loaded ceramsite and preparation method thereof

Examples

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Example Embodiment

[0036] Example 1

[0037] A kind of loaded nanometer zero-valent iron ceramsite and preparation method thereof, comprising the following steps:

[0038] (1) Dry and screen 45 parts by mass of fluorite tailings, 45 parts by mass of waste glass, 10 parts by mass of kaolin, and 20 parts by mass of blast furnace dust;

[0039] (2) weighing the raw materials after sieving, and mixing in proportion to obtain a mixture;

[0040] (3) Grinding the mixture in a ball mill to obtain a mixed concentrate with a particle size lower than 200 mesh;

[0041] (4) Molding and pressurizing the mixed concentrate;

[0042] (5) Carry out drying treatment to the mold with the charge, the drying temperature is 85°C, and the drying time is 2h;

[0043] (6) The dried green balls are sent to a heating furnace for roasting, and in an inert atmosphere, the temperature is raised to 1100°C at a heating rate of 10°C / min, and heat treatment is carried out for 30 minutes;

[0044] (7) After constant temperat...

Example Embodiment

[0045] Example 2

[0046] A ceramsite loaded with nanometer zero-valent iron and a preparation method thereof, comprising the following steps:

[0047] (1) 40 parts by mass of fluorite tailings, 45 parts by mass of waste glass, 15 parts by mass of kaolin, and 10 parts by mass of blast furnace dust are separately dried and sieved;

[0048] (2) weighing the raw materials after sieving, and mixing in proportion to obtain a mixture;

[0049] (3) Grinding the mixture in a ball mill to obtain a mixed concentrate with a particle size lower than 200 mesh;

[0050] (4) Molding and pressurizing the mixed concentrate;

[0051] (5) Carry out drying treatment to the mold of charging, drying temperature is 80 ℃, drying time is 4h;

[0052] (6) The dried green balls are sent to a heating furnace for roasting, and in an inert atmosphere, the temperature is raised to 1000°C at a heating rate of 10°C / min, and heat treatment is carried out for 40 minutes;

[0053] (7) After constant temperatur...

Example Embodiment

[0054] Example 3

[0055] A kind of loaded nanometer zero-valent iron ceramsite and preparation method thereof, comprising the following steps:

[0056] (1) Dry and screen 50 parts by mass of fluorite tailings, 45 parts by mass of waste glass, 5 parts by mass of kaolin, and 30 parts by mass of blast furnace dust;

[0057] (2) weighing the raw materials after sieving, and mixing in proportion to obtain a mixture;

[0058] (3) Grinding the mixture in a ball mill to obtain a mixed concentrate with a particle size lower than 200 mesh;

[0059] (4) Molding and pressurizing the mixed concentrate;

[0060] (5) Carry out drying treatment to the mold loaded with material, the drying temperature is 100° C., and the drying time is 3 hours;

[0061] (6) The dried green balls are sent to a heating furnace for roasting, and in an inert atmosphere, the temperature is raised to 1200°C at a heating rate of 10°C / min, and heat treatment is carried out for 20 minutes;

[0062] (7) After const...

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Abstract

The invention relates to ceramsite loaded with nanoscale zero-valent iron and a preparation method of the ceramsite, and belongs to the technical field of waste treatment. The preparation method comprises the following steps: uniformly mixing the blast furnace dust and the base material according to the proportion, and grinding to obtain a mixed concentrate; the mass ratio of the base material to the blast furnace dust is 1: (0.1-0.3), and the base material comprises the following raw material components in percentage by mass: 40-50% of fluorite tailings, 40-50% of waste glass and 5-15% of kaolin; and then the mixed concentrate is subjected to die filling and pressure applying, roasting is conducted, and the ceramsite loaded with the nanoscale zero-valent iron is obtained. The nano zero-valent iron with the ceramsite as the load is used as an environmental remediation material, the nano zero-valent iron particles anchored on the matrix can reduce hexavalent chromium in water, the matrix has an adsorption effect on the hexavalent chromium, the nano zero-valent iron and the matrix can generate a primary battery effect, and the degradation effect on the hexavalent chromium is further enhanced.

Description

technical field [0001] The invention relates to the technical field of waste treatment, in particular to ceramsite loaded with nanometer zero-valent iron and a preparation method thereof. Background technique [0002] Waste glass is one of the most difficult components of municipal waste. If waste glass is not recycled, it is not conducive to waste reduction. The cost of collection, transportation and incineration is also high, and the profit of recycling is meager, and it cannot be degraded in landfill. Calculated by one ton, recycling one ton of waste glass can save 720 kilograms of quartz sand, 250 kilograms of soda ash, 60 kilograms of feldspar powder, 10 tons of coal, and 400 degrees of electricity. Therefore, the recycling, harmless and high value-added utilization of waste glass is particularly important. [0003] Blast furnace dust is a powder by-product produced in the ironmaking process in the metallurgical industry. This kind of waste is rich in Fe and C element...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/461C02F1/70C02F101/22
CPCC02F1/283C02F1/46176C02F1/705C02F2101/22
Inventor 赵伟张兴华孙子昂国宏伟闫炳基陈栋李鹏
Owner SUZHOU UNIV
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