阅读说明：本技术 一种用钙基膨润土生产钠基膨润土的方法 (Method for producing sodium bentonite by using calcium bentonite ) 是由 李秀明 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种用钙基膨润土生产钠基膨润土的方法,其特征在于：钙基膨润土原矿晾晒至水份为13%-18%,每1000公斤原矿加入20公斤碱,通过搅拌机,搅拌均匀,进入破碎机把大块进行破碎处理,加水搅拌均匀,进入电加热挤压机,挤压机功率300W以上,压料温度为80°以上挤压15-30分钟完成后即可完成改型,膨胀比为1:30。本发明主要适用于将天然改机膨润土通过人工挤压改型为钠基膨润土的一种方式,改型成功后的钠基膨润土适用于涂料、腻子粉等产品中,作为一种黏合剂使用,本发明具有工艺方法简单、添加剂少、成本低、加工快的优点。(The invention discloses a method for producing sodium bentonite by using calcium bentonite, which is characterized by comprising the following steps: drying the calcium-based bentonite raw ore until the water content is 13-18%, adding 20 kg of alkali into each 1000 kg of raw ore, uniformly stirring the raw ore by a stirrer, crushing the large blocks by a crusher, adding water, uniformly stirring the mixture, feeding the mixture into an electric heating extruder, extruding the mixture for 15-30 minutes at the extruder power of over 300W and the pressing temperature of over 80 ℃, and finishing the modification, wherein the expansion ratio is 1: 30. The invention is mainly suitable for a mode of artificially modifying natural modified bentonite into sodium bentonite by extrusion, the successfully modified sodium bentonite is suitable for products such as paint, putty powder and the like and is used as an adhesive.)

1. A method for producing sodium bentonite by using calcium bentonite is characterized in that: the method is realized by the following steps:

1) drying the calcium bentonite raw ore to water content of 13-18%;

2) adding 20 kg of alkali into each 1000 kg of raw ore, and uniformly stirring the raw ore by using a stirrer;

3) crushing the large blocks in a crusher, adding water, stirring uniformly, feeding into an electric heating extruder, extruding for 15-30 minutes at a pressing temperature of more than 80 ℃ under the power of more than 300W, and then finishing modification with an expansion ratio of 1: 30.

2. The method for producing sodium bentonite according to claim 1, wherein: the standard of the water added in the step 3) is 20-25% of the weight of the materials in the step 2).

Technical Field

The invention belongs to the technical field of bentonite in building materials, and particularly relates to a method for producing sodium bentonite by using calcium bentonite.

Background

The amount of the sodium bentonite stored in nature is quite small, so most of the sodium bentonite seen by people is artificially prepared, the sodium bentonite which is prepared by the people is modified by an operation process, and the natural bentonite modified into the sodium bentonite has various modification methods, wherein the modification methods comprise two types of activation methods and a modifier adding method, and the two types of activation methods can realize the modification of the natural bentonite; the activation method mainly comprises an acid activation method, a high-temperature roasting method, a microwave activation method, a salt activation method, a hydrogenation method, a sodium treatment method, an oxidation method, a reduction method and the like, and the modifier addition method mainly comprises an inorganic modification method, an organic modification method, an inorganic/organic composite modification method and the like; the activating method is common, the activating method is to activate the bentonite by using some modified products, generally, the activating method is much simpler than the modifying agent method, and therefore, the activating method is widely used by people at present.

The method generally has the defects of complex process, more additives and high cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a method for producing sodium bentonite by using calcium bentonite, which has the advantages of simple process method, less additives, low cost and quick processing.

In order to realize the purpose, the invention is realized by adopting the following technical scheme: a method for producing sodium bentonite by using calcium bentonite is characterized in that: the method is realized by the following steps:

1) drying the calcium bentonite raw ore to water content of 13-18%;

2) adding 20 kg of alkali into each 1000 kg of raw ore, and uniformly stirring the raw ore by using a stirrer;

3) crushing the large blocks in a crusher, adding water, stirring uniformly, feeding into an electric heating extruder, extruding for 15-30 minutes at a pressing temperature of more than 80 ℃ under the power of more than 300W, and then finishing modification with an expansion ratio of 1: 30.

The method for producing sodium bentonite by using calcium bentonite is characterized by comprising the following steps: the standard of the water added in the step 3) is 20-25% of the weight of the materials in the step 2).

The invention is mainly suitable for a mode of artificially modifying natural modified bentonite into sodium bentonite by extrusion, the successfully modified sodium bentonite is suitable for products such as paint, putty powder and the like and is used as an adhesive.

Detailed Description