Method for preparing high-modulus water glass from iron tailings

A technology of high modulus water glass and iron tailings, applied in the direction of alkali metal silicate, silicate, etc., can solve the problem of low energy consumption, achieve recycling, improve catalytic activity, and improve the degree of comprehensive utilization Effect

Active Publication Date: 2021-02-26
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The method has low energy consumption and simple operation, and solves the environmental and recycling problems of iron tailings, an industrial solid waste.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the catalyst SY-1 adopted is: take 20g of V 2 O 5 , placed in a mixture of 40 mL of benzyl alcohol and 160 mL of isobutanol, refluxed at 150°C for 3 hours, added 5 mL of dispersant polysorbate 80, continued to reflux for 3 hours, and added phosphoric acid dropwise to make the P / V molar ratio 1.5:1, refluxed for 5 hours, filtered, washed, and dried in air at 120 °C to obtain 12 g of catalyst SY-1.

[0025] Activation method of catalyst SY-1: Press the powder of catalyst SY-1 into flakes under the pressure of 0.5MPa, crush the tablets, screen 20-40 mesh particles, and activate them in an air atmosphere at 400°C for 5h.

Embodiment 1

[0027] (1) Add the iron tailings and liquid alkali into the water glass reactor, the mass concentration of the liquid alkali is 10%, the solid-liquid ratio is 1:1, and then the activated catalyst SY-1 is added. The feed ratio is 0.05:1.

[0028] (2) After the reaction kettle was sealed, the temperature of the reaction kettle was raised to 100°C, and the reaction time was 1h.

[0029] (3) After the reaction, the water glass slurry was filtered through a suction filter bottle, and the obtained water glass product had a modulus of 2.56 and a SiO 2 The content is 31.84%, Na 2 The O content was 12.84%, and the density was 1.234 g / mL.

Embodiment 2

[0031] (1) Add the iron tailings and liquid alkali into the water glass reactor, the mass concentration of the liquid alkali is 20%, the solid-liquid ratio is 1:3, and then the activated catalyst SY-1 is added. The feed ratio is 0.1:1.

[0032] (2) After the reaction kettle was sealed, the temperature of the reaction kettle was raised to 240°C, and the reaction time was 2h.

[0033] (3) After the reaction, the water glass slurry was filtered through a suction filter bottle, and the modulus of the obtained water glass product was 2.87, and the SiO 2 The content is 30.69%, Na 2 The O content was 11.04%, and the density was 1.434 g / mL.

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Abstract

The invention aims to improve the utilization rate of waste iron tailings, provides a method for preparing high-modulus water glass from iron tailings, and belongs to the technical field of water glass preparation. The method comprises the steps of 1) adding the iron tailings and liquid alkali into a reaction kettle in proportion, adding an activated catalyst SY-1, and carrying out closed reaction, wherein the catalyst SY-1 is a compound containing vanadium and phosphorus; and 2) filtering the material after the reaction is finished to obtain a liquid, namely, a water glass product with the modulus of 2.5-3.5. The method is low in energy consumption and simple to operate, and solves the environmental and recycling problems of the industrial solid waste iron tailings. The modulus range of the water glass prepared by the method is 2.5-3.5, so that the comprehensive utilization degree of the iron tailings is improved, and a new way is provided for effective utilization of silicon dioxidein the iron tailings.

Description

technical field [0001] The invention belongs to the technical field of water glass preparation, in particular to a method for preparing high modulus water glass by using iron tailings. Background technique [0002] Iron tailings are the particulate solid powder remaining after the ore is crushed, flotation and other processes, and it is an important industrial solid waste. The tailings dam formed by a large number of tailings occupies a large amount of land; at the same time, due to the small particle size, light weight, large surface area of ​​tailings, and easy flow and collapse when stacking , soil pollution, land degradation, desertification, salinization, and ecosystem degradation; tailings contain high levels of harmful substances, and tailings ponds also harm nearby water sources. [0003] At present, the comprehensive utilization rate of tailings in my country is relatively low, and the main utilization direction is the construction field. Therefore, it is necessar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
CPCC01B33/32Y02W30/91
Inventor 刘思彤郭客胡建刘太和徐小革柴青平林岩高源
Owner ANSTEEL GRP MINING CO LTD
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