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As the sediment of rivers and lakes is no longer allowed to be salvaged, it has created another world of machine-made sand. However, machine-made sand is faced with such a link as sand washing, which will wash out a large amount of soil; With the accumulation of time day by day, the sand washing mud has brought serious negative effects on the sand washing site and the environment. It has become the object of special attention in the environmental impact assessment and management, and has become the bottleneck for the further development of each sand washing site.

In the early stage, the treatment methods of sand washing mud are landfill and open stacking, some of which are used for road paving, and a considerable part of which are used for firing bricks or other ceramic products; However, with the passage of time and the continuous strict requirements of the environmental impact assessment, there is no place for landfill and landfill, and it is not allowed to stack and landfill at will.

The next way to wash sand and mud is to make unburned bricks, press them with static pressure brick machine and hydraulic brick machine, and then maintain them. Making unburned bricks can solve the problem of washing sand and mud, but it is not a good solution. The main problems are: 1. Ensure that the sand and mud are dry; 2. High cost in drying process; 3. Mud brick itself is relatively heavy and cannot be used for floor building; 4. The product is relatively simple and difficult to sell. It is precisely because of the above problems and the many problems arising from this problem that the road of making non burning bricks with sand washing mud is not very smooth.

With the continuous appeal of market demand, in order to better wash the sand and mud, Mr. Liu and his team of Quanzhou Yihong brick machine decided to make foamed bricks by mixing a certain proportion of blowing agent, cement, accelerator and other materials from the wet molding process. The comparative analysis of using foamed bricks and making unburned bricks is as follows:

The advantages are as follows: ① the sand washing mud does not need to be dried, which saves the drying cost and site; ② Foamed brick is relatively light, with the same volume, only about one fifth of the weight of mud solid brick, so it can be used for high-rise buildings; ③ It can be cut according to the actual brick size requirements; ④ Mud foamed brick has the function of fire prevention.

Disadvantages: ① the processing capacity is relatively low; ② Need to invest more mold costs; ③ It is difficult to form automatic assembly line production.

Everything has its advantages and disadvantages. It depends on the angle from which you analyze the problem. The mature application of sand washing mud foamed brick is also a manifestation of technological development, which broadens the treatment channel of sand washing mud and the source of bricks for building materials. Our team will not stop at this point in the research of mud brick making, but will intensify the research and strive to make greater breakthroughs in the treatment of sand washing mud as soon as possible.

As a matter of fact, I have long proposed a relatively centralized treatment plan for the treatment of sand washing mud, that is, unified planning, combined with more powerful forces, strive to develop market demand and meet market demand, so as to better produce products that are seamlessly connected with the market, combine production with sales, and make solid waste resources better, more reasonable and non wasteful.

There may be a better way to make bricks with water washed sand mud, which is still waiting for our development. The existing scheme of making mud free burning bricks from sand washing mud has not stopped there, and mud foamed bricks have just risen, so we need to encourage each other. Friends of the sand washing plant, as well as friends and scholars who are interested in mud brick making and solid waste brick making can also contact Mr. Liu of Yihong brick machine in Quanzhou, and let us work together to study this topic in depth!