A kind of engineering sand making method

An engineering and sand-gravel technology, applied in the field of engineering sand making, can solve the problems of difficult sand mica content regulation, insufficient reliability, complicated procedures, etc., and achieve the effects of ensuring particle size uniformity, improving accuracy, and improving accuracy.
CN110668726BActive Publication Date: 2021-12-31STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2021-12-31

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Abstract

The invention discloses a method for engineering sand production, which comprises the following steps: S1, crushing: crushing parent ore to obtain coarse sand and gravel; S2, ball milling: performing ball milling on the obtained coarse sand and gravel to obtain sand and gravel Fine material; S3, screening: screening the obtained sand and gravel fine material to obtain sand and gravel of required specifications; S4, grading: classifying the obtained sand and gravel to obtain sand of different grades; S5, determination of mica content: for each The sand of grade carries out the mensuration of mica content respectively; S6, winnowing: adopt winnowing to remove the mica in the sand of each different grade, the number of times of described winnowing is determined according to the mica content in the sand sample of each grade measured; S7. Secondary determination of mica content: measure again the content of mica in the sand obtained by winnowing. The method of the invention has the advantages of low cost, simple operation, high efficiency and good reliability, can realize precise control of mica content and effectively improve sand quality.
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Description

technical field

[0001] The invention belongs to the technical field of engineering sand making, and in particular relates to a method for engineering sand making. Background technique

[0002] Mica is a rock-forming mineral that presents a hexagonal flaky crystal shape. It is one of the main rock-forming minerals. The mica crystal has a layered structure inside, so it is a flaky crystal, mainly hexagonal flaky crystals. Its characteristics are insulation and High temperature resistance, the most widely used in industry is sericite, which is widely used in coatings, paints and electrical insulation industries. When the mica content in engineering sand exceeds 2%, the work degree loss of concrete made by engineering sand can reach When the mica content in the aggregate reaches 10%, the slump of concrete reaches 100%. Therefore, it is particularly important to control the mica content in engineering sand making.

[0003] However, the current methods of engineering sand product...

Claims

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