阅读说明：本技术 一种水泥助磨剂用糖蜜前处理的方法 (Method for pretreating molasses for cement grinding aid ) 是由 曹智勇 杨志权 余志全 吴中飞 于 2020-07-24 设计创作，主要内容包括：本发明提供了一种水泥助磨剂用糖蜜前处理的方法,解决了现有技术中,糖蜜粘度大,杂质多,从而导致生产成本高的问题。所述糖蜜前处理的方法包括下述步骤：S1、检测糖蜜初产品中的含糖总量；依据所需水泥助磨剂的粘度、糖分以及S1中所得含糖总量计算稀释时水和糖蜜初产品的配比；S3、根据S2中所得配比对糖蜜初产品进行稀释,得到稀释后的糖蜜；S4、将S3中稀释后的糖蜜进行静置过滤,得到糖蜜成品。本发明提供的上述糖蜜前处理的方法,能够降低糖蜜粘度和杂质,从而降低生产成本。(The invention provides a method for pretreating molasses for a cement grinding aid, which solves the problem of high production cost caused by high viscosity and many impurities of molasses in the prior art. The method for pretreating molasses comprises the following steps: s1, detecting the total sugar content in the molasses initial product; calculating the proportion of water and the molasses primary product during dilution according to the viscosity and sugar content of the required cement grinding aid and the total sugar content obtained in S1; s3, diluting the molasses primary product according to the proportion obtained in S2 to obtain diluted molasses; s4, standing and filtering the molasses diluted in the S3 to obtain a molasses finished product. The molasses pretreatment method provided by the invention can reduce the viscosity and impurities of molasses, thereby reducing the production cost.)

1. A method for pretreating molasses for a cement grinding aid is characterized by comprising the following steps: the method comprises the following steps:

s1, detecting the total sugar content in the molasses initial product;

s2, calculating the proportion of water and the molasses primary product during dilution according to the viscosity and sugar of the required cement grinding aid and the total sugar content obtained in the S1;

s3, diluting the molasses primary product according to the proportion obtained in S2 to obtain diluted molasses;

s4, standing and filtering the molasses diluted in the S3 to obtain a molasses finished product.

2. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: the steps S3 and S4 are carried out at the temperature of 5-40 ℃.

3. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: in step S1, the total sugar content is measured by the DNS method.

4. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: in the step S3, the prepared water and the molasses primary product are added into the crystallizer according to the mixture ratio, and stirred and diluted to obtain the diluted molasses.

5. The method for pretreating cement grinding aid by using molasses as claimed in claim 4, wherein the method comprises the following steps: the rotating speed of the stirring is 130-150 r/min, and the time is 5-15 min.

6. The method for pretreating cement grinding aid by using molasses as claimed in claim 5, wherein the method comprises the following steps: the stirring time is 5 minutes at a temperature of 30-40 ℃ and 15 minutes at a temperature of 5-10 ℃.

7. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: in the step S4, the diluted molasses is filtered to obtain the finished molasses.

8. The method for pretreating cement grinding aid by using molasses as claimed in claim 7, wherein the method comprises the following steps: the diluted molasses is required to be left for 10-20 minutes after the stirring is finished.

9. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: the sugar content of the obtained molasses is detected to determine whether the sugar content is 0.98-30%.

10. The method for pretreating cement grinding aid by using molasses as claimed in claim 1, wherein the method comprises the following steps: and (4) performing viscosity detection on the obtained finished molasses to confirm whether the viscosity of the finished molasses is less than 100 mpa.s.

Technical Field

The invention relates to a method for pretreating molasses for a cement grinding aid.

Background

Molasses, a by-product of sugar manufacturing processes. It is dark brown, liquid, poor in fluidity and high in viscosity, and its components are slightly different according to different sugar-making raw materials and processing conditions. The molasses is a raw material with wide application, and can be used in the industries of fermentation, breeding feed, food, medicine, building materials, plastic and the like. In addition to being processed into various fermentation products (alcohol, monosodium glutamate, citric acid, lysine, yeast and the like), cane molasses is also used for producing antibiotics, riboflavin, caramel pigment and the like, and is also commonly used as a feed additive or directly used for cultivation. In recent years, molasses is also developed and utilized as an auxiliary raw material in the building material industry and the steelmaking industry, and the molasses is mainly applied to grinding aids, lignin, water reducers and calcium saccharified because of more impurities such as ash, colloidal substances and the like, more harmful microorganisms and easy fermentation due to heat.

The molasses is a sugar-making by-product, is low in cost and sufficient in supply, and when the molasses is used as a grinding aid, electricity is saved by 17-20%, the strength of cement at each age is improved, the workability of the cement is improved, the setting time is adjusted, grinding particles are uniform, and the problem of grinding aid of slag cement existing for a long time is solved.

However, as an inexpensive sugar-making by-product, there are also the following disadvantages in use:

the molasses has high viscosity and is difficult to flow in winter, when the component content is high, the molasses is difficult to directly enter a grinding aid production kettle through a pipeline, and the molasses can be added into a reaction kettle through a container after being transferred from the container;

because the sugar-making byproduct has low utilization value and is not subjected to any filtration during shipment, the sugar-making byproduct contains more impurities and insoluble substances, and is easy to cause: the motor rotor is damaged, and obvious precipitation and floating impurities appear in the grinding aid product.

After the product with high molasses content is used, a thicker insoluble precipitate layer is easily formed at the bottom of the storage tank, so that a supplier needs to artificially clean the storage tank of a customer at irregular intervals, and large funds and manpower are consumed.

Because of different raw material fluctuations of the sugar manufacturing process, the molasses produced by the same manufacturer has larger content fluctuation, and products produced by the same manufacturer often have unstable quality and are adjusted, so that the grinding-aid use effect of cement manufacturers is directly influenced.

Disclosure of Invention

The invention aims to provide a method for pretreating molasses for a cement grinding aid, which aims to solve the problems of high viscosity, more impurities and high cost when the existing molasses is used in the production technology of the cement grinding aid. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a method for pretreating molasses for a cement grinding aid, which comprises the following steps:

s1, detecting the total sugar content in the molasses initial product;

s2, calculating the proportion of water and the molasses primary product during dilution according to the viscosity and sugar of the required cement grinding aid and the total sugar content obtained in the S1;

s3, diluting the molasses primary product according to the proportion obtained in S2 to obtain diluted molasses;

s4, standing and filtering the molasses diluted in the S3 to obtain a molasses finished product.

Further, the steps S3 and S4 are carried out at a temperature of 5-40 ℃.

Further, in step S1, the detection of the total sugar content is performed by using the DNS method.

Further, in the step S3, the prepared water and the molasses primary product are added into the crystallizer according to the mixture ratio, and stirred and diluted to obtain the diluted molasses.

Further, the rotation speed of the stirring is 130-150 rpm, and the time is 5-15 min.

Further, the stirring time is 5 minutes at a temperature of 30 to 40 ℃ and 15 minutes at a temperature of 5 to 10 ℃.

Further, in the step S4, the diluted molasses is filtered to obtain the finished molasses.

Further, the diluted molasses should be left to stand for 10-20 minutes after the completion of the stirring.

Further, detecting the sugar content of the obtained molasses product to determine whether the sugar content is 0.98-30%; and (4) performing viscosity detection on the obtained finished molasses to confirm whether the viscosity of the finished molasses is less than 100 mpa.s.

Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:

(1) according to the method for pretreating the cement grinding aid by using molasses, provided by the invention, water with a specific proportion is added for dilution, so that the viscosity is reduced, the pipeline transportation is facilitated, and the production speed and efficiency are improved.

(2) The method for pretreating the cement grinding aid by using molasses provided by the invention filters in a standing filtering mode, so that impurities in the molasses are fully reduced, the quality of the molasses is improved, and the cost is reduced.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

First, preparation example: