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A kind of method using barium hydroxide and silicic acid to prepare gelled material

A technology of barium hydroxide and cementitious materials, applied in the field of cementitious materials, can solve problems such as environmental pollution and toxicity, and achieve the effects of high strength and large specific gravity

Active Publication Date: 2021-10-26
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

Due to the certain toxicity of barium-containing waste residue, it will cause great pollution to the environment, and it is also very cautious to deal with it at home and abroad.

Method used

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  • A kind of method using barium hydroxide and silicic acid to prepare gelled material
  • A kind of method using barium hydroxide and silicic acid to prepare gelled material

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Embodiment Construction

[0019] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0020] Such as figure 1 Shown, a kind of method that uses barium hydroxide and silicic acid to prepare gelled material, the steps are as follows:

[0021] (1) Take by weighing 157.735g barium hydroxide, place in deionized water, fully stir and dissolve with a glass rod; the chemical composition of barium hydroxide is as follows: analytical formula Ba(OH) 2 ·8H 2 O, Ba(OH) 2 ·8H 2 O content ≥ 98%, barium impurity content ≤ 1%;

[0022] (2) According to the Ba:Si molar ratio of 1:1, weigh 39.05g of silicic acid, place it in deionized water, stir and dissolve it fully with a glass rod; a total of 300g of deionized water is used in the two steps. The chemical composition of silicic acid is as follows: maximum content of impurity: non-volatile matter 0.20%, loss on ignition 20-28%, chloride 0.005%, sulfate 0.02%, iron 0.005%, based on Pb, heavy ...

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Abstract

A kind of method that uses barium hydroxide and silicic acid to prepare gelling material, barium hydroxide and silicic acid are respectively dissolved in deionized water according to the molar ratio of 1:1, then mixed and stirred in a sealed container, constant temperature water bath, suction filtration, After drying, the hydrated barium silicate gel material is obtained. Barium silicate cement has high early strength and high density. It can be used to prepare heavy concrete with good uniformity and compactness. In addition to the physical properties of ordinary concrete, it also has a specific gravity. It can be used for radioactive radiation combined with biological protection and high temperature or sulfate corrosion, and it can also be used for long-term storage of low-level radioactive waste. The invention can replace the method of firing barite and clay to obtain clinker, and adding an appropriate amount of gypsum to grind together to form barium silicate cement. The sol-gel method does not require calcining, and has more economic benefits.

Description

technical field [0001] The invention belongs to the technical field of gelling materials, in particular to a method for preparing gelling materials by using barium hydroxide and silicic acid. Background technique [0002] With the development of the chemical industry and production, the amount of barium-containing waste and barium slag is increasing year by year. Because barium-containing waste residue has certain toxicity and will cause great pollution to the environment, it is also very cautious to deal with it at home and abroad. Barium-containing waste slag can not only be used as a mineralizer to improve cement strength and cement performance to a certain extent, but also can be used to prepare hydrated barium silicate cement, which has high early strength and high density, and can be formulated into uniform and dense cement. Good heavy concrete. In order to control costs, save resources, save energy and make waste, it has been used in building materials to a certain ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/06C04B7/36
CPCC04B7/06C04B7/36
Inventor 宋强王倩张军胡亚茹
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY