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Industrial slag brick making machine

Industrial waste plays an aggregate role in the production of cement bricks. Many industrial wastes can be used to produce cement bricks, including: power plant fly ash, steel mill slag, non-ferrous metal refinery smelting slag, all kinds of mining tailings, electrolytic copper pools, chemical waste gypsum and chemical lime, construction waste brick, construction waste, etc. The chemical composition, mineral composition, harmful substances and positive and side effects of various industrial wastes are not the same, so when using industrial wastes to produce cement bricks, a reasonable formula should be formulated after analyzing the characteristics of various wastes and according to its strength formation mechanism. Some industrial waste slag, after adding an appropriate amount of curing agents and admixtures, can be used alone to make cement bricks: such as the use of fly ash, adding river sand and lime, gypsum, cement and composite admixtures, to produce 28d strength of 31MPa industrial waste cement bricks; For example, in the pretreatment of lead and zinc tailings, adding an appropriate amount of cement and admixtures, to produce not less than MU10 industrial waste cement bricks. Most of the research is to use several industrial waste slag with each other, complementary or synergic advantages: for example, now Qin Jin is more good, fly ash and steel slag combined to make cement bricks, fly ash and steel slag active ingredients in the action of curing agent and admixture can be excited to meet the strength requirements of bricks. The material diameter of fly ash is relatively small, and the single brick lacks the aggregate effect of large particles. The steel slag with a larger particle size distribution can meet this condition, and the resulting production of cement bricks has better performance, such as the use of Baotou steel fly ash and steel slag to produce MU10-MU15 cement bricks. When determining the formula of industrial waste cement brick, not only should the content of waste slag be increased as much as possible, but also should make use of the characteristics of various waste slag itself conducive to the production of cement brick, so as to reduce the amount of additives and admixtures as much as possible, so as to effectively reduce the production cost of brick. The production of industrial waste cement bricks is more commonly used waste residues of the main chemical, mineral.

In addition, some industrial waste is not suitable or can not be used in large quantities for brick making because of its radioactivity, and its radioactivity should be detected before use. Some industrial wastes, such as fly ash, must be pre-treated before use, remove roots and debris, and some need to be ground to the required material diameter before use; For example, the scrap steel slag discharged from the converter needs to go through magnetic separation first, remove the block steel block, and then grind through the wet ball to the required particle size.

The particle size of waste slag determines whether it is necessary to add additional aggregate when producing industrial waste cement bricks. In the mix of industrial waste cement bricks, adding an appropriate amount of aggregate with appropriate particle grading can prevent brick delamination, reduce shrinkage, improve the exhaust performance of the brick during molding, increase the compactness, thereby improving the strength and durability of the brick, and saving the amount of binder and reducing the cost.

There are three kinds of sand as aggregate: river sand, mountain sand and sea sand. Because the mountain sand has a sharp edge and can be better combined with cement, so that the brick has a higher listening strength, so the choice of mountain sand is better. However, sand that can generally be used for building materials can be used for the production of industrial waste cement bricks. In fact, some waste slag itself has the role of aggregate, such as steel slag produced by steel mills, coal gangue, mining tailings and so on.

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