Kaolin-based curing agent as well as preparation method and application thereof

A kaolin and curing agent technology, applied in the field of inorganic chemical industry, can solve the problems of limited application and promotion, high manufacturing and use costs, and achieve the effects of fewer types of raw materials, improved mechanical properties, and improved bonding properties

Pending Publication Date: 2022-04-26
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the raw material for its preparation is high-quality alumina or aluminum hydroxide, and fine powder raw materials such as zirconia, copper oxide, and magnesia need to be used in the application process, its manufacturing and use costs are very high, which limits its application. and promotion

Method used

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  • Kaolin-based curing agent as well as preparation method and application thereof
  • Kaolin-based curing agent as well as preparation method and application thereof
  • Kaolin-based curing agent as well as preparation method and application thereof

Examples

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preparation example Construction

[0033] The present invention provides the preparation method of kaolin-based solidifying agent described in above-mentioned technical scheme, comprises the following steps:

[0034] (1) Preheating after mixing kaolin and water to obtain a suspension;

[0035] (2) Mix the suspension obtained in the step (1) with the phosphoric acid solution to react to obtain a kaolin-based curing agent.

[0036] In the invention, kaolin and water are mixed and then preheated to obtain a suspension.

[0037] In the present invention, when the particle size of the kaolin does not meet the requirement, the present invention preferably ball mills the kaolin before mixing. In the present invention, there is no special limitation on the specific operation of the ball milling. It is sufficient to adopt the conventional ball milling process in the field to make the particle size of the kaolin meet the requirements.

[0038] In the present invention, the mixing is preferably performed under stirring co...

Embodiment 1

[0062] A kaolin-based curing agent, prepared from the following raw materials in parts by mass: 100 parts of kaolin, 80 parts of phosphoric acid solution, and 150 parts of water; the kaolin is kaolin concentrate, and the Al 2 o 3 Grade ≥ 35%; the mass percentage of the kaolin with a particle size of -0.074mm ≥ 95%; the mass concentration of the phosphoric acid solution is 72%;

[0063] The preparation method of described kaolin-based curing agent consists of the following steps:

[0064] (1) After kaolin and water are stirred and mixed, preheat to 110°C by means of electromagnetic heating to obtain a suspension;

[0065] (2) Heating the phosphoric acid solution to 50°C by means of pipeline heating, and then adding the phosphoric acid solution dropwise to the suspension in the step (1) under stirring conditions to react to obtain a kaolin-based curing agent; the reaction The temperature is 110°C, and the reaction time is 75-90min.

Embodiment 2

[0067] A kaolin-based curing agent, prepared from the following raw materials in parts by mass: 100 parts of kaolin, 95 parts of phosphoric acid solution, 150 parts of water, and other conditions are the same as in Example 1.

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Abstract

The invention provides a kaolin-based curing agent as well as a preparation method and application thereof, and belongs to the technical field of inorganic chemical industry. The invention provides a kaolin-based curing agent. The kaolin-based curing agent is prepared from the following raw materials in parts by mass: 100 parts of kaolin, 80-250 parts of a phosphoric acid solution and 100-500 parts of water. According to the invention, kaolin is used as a base material, aluminosilicate components in kaolin are fully utilized and reacted with phosphoric acid, and silica gel and aluminum dihydrogen phosphate or aluminum monohydrogen phosphate with relatively strong cementing performance are prepared, so that the bonding performance of the curing agent is improved, and the service life of the curing agent is prolonged. After mixing with solid waste, the mechanical property of a solidified body can be greatly improved; meanwhile, silica gel and aluminum dihydrogen phosphate or aluminum monohydrogen phosphate can play a good role in curing radioactive substances, and after the curing agent is mixed with radioactive solid waste, the radioactivity of the product is greatly reduced, so that the product is more environment-friendly; the curing agent has few raw material types, so that the preparation process of the curing agent is simple.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical industry, in particular to a kaolin-based curing agent and its preparation method and application. Background technique [0002] Tailings and tailings are solid wastes discharged by the mining industry. After the raw ore enters the concentrator and undergoes crushing, grinding and sorting operations, the tailings and tailings are discharged in the state of slurry. A small concentrator with a daily processing capacity of 100 tons can discharge more than 80-90 tons of tailings per day. Solid waste often contains a large amount of chemicals and harmful substances, the source of which is the addition of flotation chemicals and metal elements in the ore during the beneficiation process, common chloride, xanthate, black medicine, pine oil, copper ions, lead ions, Zinc ions, arsenic, phenol mercury, etc. may also be present in individual cases, which are harmful to human body, livestock, fish...

Claims

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Application Information

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IPC IPC(8): C04B12/04C04B12/02
CPCC04B12/04C04B12/022C04B12/027
Inventor 黄萍萍罗明亮刘永李向阳赵天吉冯鸿伟张杰文鑫海胡志涛谢宇鹏
Owner NANHUA UNIV
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