1. The comprehensive utilization technology and process of feldspar minerals The main deposits of feldspar are pegmatite, weathered granite , fine-grained rock (semi-weathered granite), in addition to feldspar pottery, potassic rhyolite, and snake rhyolite associated albite, nepheline diorite white granite and the like. Depending on the type of feldspar deposit and the nature of the ore, different methods of beneficiation are required. Generally, the crushing and grinding is carried out after the hand picking, and then the iron mineral is removed by magnetic separation. In recent years, with the reduction of rich feldspar mines and the development of comprehensive recovery of feldspar technology in other mines, more complicated sorting operations such as re-election, electric selection and flotation have been introduced to remove associated minerals such as quartz and mica . To obtain a feldspar concentrate rich in potassium and sodium and to recycle high quality products.
According to the ore nature of the feldspar mine, the general selection process principle is as follows:
(1) High-quality feldspar produced in pegmatite: hand selection → crushing → grinding (or water milling) → classification.
(2) Feldspar in weathered granite: crushing→grinding→grading→flotation (except iron and mica)→flotation (separation of quartz and feldspar).
(3) Feldspar in fine-grained rock (generally containing mica, sometimes containing iron): crushing → grinding → screening → magnetic separation.
(4) feldspar sand mine: water elution mud → sieving (or flotation separation quartz, etc.).
2. Development and production examples (1) Shandong Xintai Changshi Mine The mine is located in the east stone shed and the north of the stone shed in Yangliu Township, Xintai County, Shandong Province. The deposit is a metamorphic schist system, and the ore is mainly potassium feldspar (blocky). ), also contains albite, quartz, muscovite and so on.
Due to its good quality of raw ore, Xintai feldspar mine can be industrially demanded only by hand selection in the mine or by powdering after crushing and grinding (water milling). The processing process of mineral processing is as follows: [next]

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(3) Yunnan Gejiu Changshi Mine The mine is located in Baimazhai, Gejiu City, Yunnan Province. The main minerals in the ore include kaolin (0.9mm), quartz (>1.2mm), and biotite (<1.2mm). .
The Gejiu feldspar mine was built in the early 1970s. The granite magneto-electric concentrating plant with dry grinding and dry selection process separates the three minerals of feldspar, quartz and mica to obtain feldspar concentrate. The process is as follows:

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The specifications of the old feldspar mineral products are as follows:

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(4) Hubei Changshi Mine The main mineral components of the ore are: micro-plagioclase (39.9%), albite (19.6%), quartz (32.8%), mica (7.8%, mainly muscovite), and A small amount of schist debris (1.5%), garnet (0.08%) and continuous minerals (2.31%).
The semi-industrial test process of Hubei Changshi Mine is as follows:

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