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Method for preparing high belite sulphoaluminate clinker from lithium slag

A technology of special sulfoaluminate and lithium slag is applied in the field of building materials, which can solve the problems of low calcination temperature and achieve the effect of low calcination temperature and broad promotion prospects.

Active Publication Date: 2021-11-26
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to aim at the deficiency of above-mentioned background technology, provide a kind of method that utilizes lithium slag to prepare high belite sulfoaluminate clinker, this method can fully utilize the sulfur element in lithium slag simultaneously, can not cause The problem of environmental pollution, and the calcination temperature is low

Method used

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  • Method for preparing high belite sulphoaluminate clinker from lithium slag
  • Method for preparing high belite sulphoaluminate clinker from lithium slag
  • Method for preparing high belite sulphoaluminate clinker from lithium slag

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Embodiment 1

[0024] A method for preparing high belite sulfoaluminate clinker by utilizing lithium slag, comprising the steps of:

[0025] (1) Take the dried calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron raw materials and grind them to 200-500 mesh respectively, then grind the calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron The high-energy raw materials are mixed with the mass ratio of 50:30:12:4:4 to obtain a mixture. After adding 5% water to the mixture, it is added to a high-energy ball mill for high-energy ball milling (the rotating speed of the high-energy ball mill is 500r / min, the time is 15min), to obtain raw meal;

[0026] (2) After pressing the raw material into pieces, put it in a box-type resistance furnace with microwave function, first raise the temperature to 850°C at a rate of 15°C / min, keep it warm for 0.5h, and then increase the temperature at a rate of 15°C / min Raise the rate ...

Embodiment 2

[0030] A method for preparing high belite sulfoaluminate clinker by utilizing lithium slag, comprising the steps of:

[0031] (1) Take the dried calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron raw materials and grind them to 200-500 mesh respectively, then grind the calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron The high-energy raw materials are mixed with a mass ratio of 55:30:5:5:5 to obtain a mixture. After adding 7% water to the mixture, the mixture is added to a high-energy ball mill for high-energy ball milling (the speed of the high-energy ball mill is 400r / min, the time is 30min), to obtain raw meal;

[0032] (2) After the raw material is pressed into pieces, it is placed in a box-type resistance furnace with microwave function, and the temperature is raised to 900 °C at a rate of 10 °C / min. Raise to 1150°C, microwave-assisted heat preservation for 15 minutes, microwave frequ...

Embodiment 3

[0035] A method for preparing high belite sulfoaluminate clinker by utilizing lithium slag, comprising the steps of:

[0036] (1) Take the dried calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron raw materials and grind them to 200-500 mesh respectively, then grind the calcareous raw materials, lithium slag, aluminum raw materials, gypsum raw materials and iron The high-energy raw materials are mixed with the mass ratio of 55:35:4:3:3 to obtain a mixture, after adding water accounting for 8% of the mixture in the mixture, it is added to a high-energy ball mill for high-energy ball milling (the rotating speed of the high-energy ball mill is 600r / min, the time is 40min), to obtain raw meal;

[0037] (2) After the raw material is pressed into pieces, it is placed in a box-type resistance furnace with microwave function, and the heating rate is raised to 950 °C at a rate of 10 °C / min, and after 1 hour of heat preservation, the heating ra...

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Abstract

The invention relates to a method for preparing a high belite sulphoaluminate clinker by using lithium slag, which comprises the following steps: respectively grinding dried calcium raw material, lithium slag, aluminum raw material, gypsum raw material and iron raw material to 200-500 meshes, mixing the components according to the mass ratio of (45-60):(25-35):(5-20):(1-5):(1-10), adding water accounting for 5-10% of the mixture, carrying out high-energy ball milling to obtain a raw material, pressing the raw material into sheets, and heating the raw material to 800-950 DEG C at the heating rate of 5-15 DEG C / min, preserving heat for 0.5-1 hour, heating the raw material to 1100-1200 DEG C at the heating rate of 5-15 DEG C / min, preserving heat for 1-30 minutes under the assistance of microwaves, quenching the calcined product to room temperature, and grinding the calcined product to obtain the product. Compared with the prior art, the method can make full use of main elements of the lithium slag, is low in calcination temperature, and has the characteristics of environmental protection, low carbon and low energy consumption.

Description

technical field [0001] The invention relates to a method for preparing high belite sulfoaluminate clinker by using lithium slag as a raw material, belonging to the technical field of building materials. Background technique [0002] Lithium slag is a solid waste produced during the extraction of lithium carbonate from the sulfuric acid spodumene industry, and its main components are oxides of silicon, aluminum, calcium, sulfur, etc. At present, nearly ten tons of lithium slag will be produced in the domestic production of one ton of lithium carbonate products by sulfuric acid method. A large amount of lithium slag is usually disposed of by landfill or open-air stacking, which not only occupies space, but also will be lost with wind and rain, polluting the environment. How to effectively utilize waste lithium slag, turn waste into treasure, and create economic and social benefits for enterprises has become a major problem that relevant production enterprises need to solve urg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/345C04B7/42C04B7/40C04B7/46
CPCC04B7/1535C04B7/3453C04B7/40C04B7/425C04B7/424C04B7/421C04B7/46Y02P40/10
Inventor 崔群张伟栋王海燕张林李南平葛建敏
Owner NANJING TECH UNIV