Method for purification of quartz sand ore in physical mode

Abstract

The invention discloses a method for purification of quartz sand ore in a physical mode. The method comprises the following steps that S1, quartz sand ore is coarsely broken by a jaw breaker, finely broken by a sanding machine and then wet-screened by a 60-meshed vibration screen; S2, the quartz sand ore screened by the vibration screen enters a spiral classifier of desliming equipment to be coarsely screened, finely screened by a swaging machine, scavenged and deslimed by a sand washer, and screened by a high-frequency vibration screen in three size ranges; S3, the quartz sand ore of the three size ranges obtained in the S2 enters a shaking table and the swaging machine for deferrization according to needs; S4, flotation is conducted, i.e., a material obtained in the S3 is added with water to be made into slurry with the concentration being 22%-28%, foaming agents are added to the slurry, dilute sulphuric acid is added to the slurry until the pH is equal to 2.8, surface foam is removed, obtained lower solid is dried, and a material A is obtained; and S5, the material A is subjected to magnetic separation in a wet type strong-magnetism magnetic separator and then dried, and therefore the finished quartz sand ore is obtained. The method has the advantages that operation is simple, production cost is low, the purify of the quartz sand ore is high, the iron content is quite small, and the interval of the size ranges of the quartz sand ore is narrow.

Description

technical field [0001] The invention relates to the technical field of preparation of high-purity quartz sand, in particular to a method for purifying quartz sand ore by a physical method. Background technique [0002] High-purity silica is an extremely important optoelectronic material, which is widely used in high-tech fields such as semiconductors, optical fiber communications, lasers and aerospace. With the rapid development of these fields, the requirements for the content of impurities in high-purity silica are more stringent, and the demand for high-purity silica is also increasing. At present, most of the high-purity silica needed in my country depends on imports. Therefore, the use of quartz sand purification technology to obtain high-purity silica is an effective way to meet the demand for high-purity silicon in my country's high-tech fields, and it is of great significance to promote the development of my country's national economy. [0003] Quartz sand contains...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a method for purifying quartz placer by physical method, which has the advantages of simple operation, low production cost, high purity of quartz sand, high iron content, narrow interval of quartz sand grains, etc., avoiding the Environmental protection problems caused by flotation and acid leaching tail water treatment, dust pollution problems caused by quartz sand dry screening and dry grinding