为破解高新技术产业产值规模小、企业创新发展动能不足等问题，近年来，嵩明县将高新技术企业培育 作为推动产业转型升级、增强区域创新能力的核心抓手，坚持"一企一策"，构建"科技型中小企业—高 新技术培育入库企业—高新技术企业"梯度成长通道，充分发挥财政奖补资金、税收优惠、研发费用补 助等政策叠加效应，一大批像凯瑞特这样的创新型企业茁壮成长。2025年，嵩明县高新技术企业累计总 数预计达103家，新增评审通过户数排名昆明市第一。 嵩明县科工信局开展高频次企业走访、政策宣传、专题培训，鼓励企业加大技术研发投入、积极申报高 新技术企业，不断提升企业创新主体地位和创新能力。"我们坚持在科技项目申报、创新平台建设、人 才引进等方面给予优先支持，形成认定有奖励、成长有支持的良好生态，确保高新技术企业引得进、认 得上、留得住、发展好。"县科工信局副局长姚珀介绍。 今年2月，工作人员在入企调研中发现，昆明嘉鼎博实新材料科技有限公司在申报高新技术企业时欠缺 科技成果转化能力。嵩明县科工信局立刻牵线搭桥，促成该公司与云南城市建设学院达成产学研长期合 作协议，公司科技成果转化能力得到增强。9月，公司顺利通过高新技术企业评审，企业负责人高 ...

Crushing and Screening Stage - The initial step involves selecting high-purity, low-gray particles from larger ore types like quartzite, followed by crushing using jaw or cone crushers, ensuring the desired particle size through a closed-loop system with vibrating screens [2] - The crushed product is then processed in a sand-making machine to obtain quartz sand of specific granularity [2] Grinding Stage - Quartz sand grinding typically employs a single-stage or two-stage overflow ball mill, with the second stage forming a closed-loop cycle with a spiral classifier or hydrocyclone to ensure the required fineness [3] Beneficiation Stage - To achieve high-purity industrial quartz sand, further purification processes are necessary after obtaining quartz sand of a certain granularity, including washing, classification, scrubbing, magnetic separation, flotation, and acid leaching [4] - Washing and classification are essential to remove clay and impurities, as the quality of quartz sand decreases with smaller particle sizes [4] - Scrubbing utilizes mechanical force to remove iron films or adhering impurities from quartz particles, followed by separation of finer particles using a hydrocyclone [4] - Magnetic separation effectively removes weakly magnetic impurities like hematite and biotite, using wet permanent magnetic drum separators for weak magnetic and high-gradient magnetic separators for strong magnetic separation [4] - Flotation aims to remove non-magnetic impurities such as feldspar and mica, with HF commonly used as an activator in the process [5] - Acid leaching exploits the solubility properties of quartz to separate and purify it, as quartz is nearly insoluble in common acids except for HF [5] - Microbial leaching is an emerging technique that uses specific microorganisms to remove iron films from quartz sand, showing promising results in laboratory settings but requiring further industrial research [5]