天水有家新材料公司，厂区建在麦积区社棠镇的工业园区里。生产线旁边就是成片的厂房，完全看不出传统砂石厂那种“晴天一身灰、雨天一身泥”的样子。凝灰岩这种石头，硬度高、脆性大，破碎过程中特别容易产生大量石粉。用传统工艺做出来的机制砂，亚甲蓝值经常超标——说白了就是石粉吸附性太强，拌进混凝土里流动性差、强度上不去。用这种砂修路架桥？工程质量根本没法保证。

西北地区天然砂资源本就匮乏，河砂开采又受到严格限制，工程建设对高品质机制砂的需求越来越迫切。可凝灰岩这块“硬骨头”，谁啃得动？

好的关：怎么把石头“拆”明白

凝灰岩的破碎，难点在于既要破碎效率高，又要保证骨料粒型好。传统弹簧圆锥破对付这种硬岩，往往力不从心——要么产量上不去，要么成品针片状太多。

世邦工业的技术团队给出的方案是HPC系列多缸液压圆锥破碎机。这台设备的核心在于“层压破碎”原理——不是靠蛮力砸碎石头，而是让石料在破碎腔内相互挤压、摩擦。石头跟石头“打架”，出来的骨料粒型更规整，针片状含量大幅降低。

设备采用了主轴固定、偏心套绕主轴旋转的结构设计，配上全液压操控系统和一体式润滑装置，运行起来比传统设备稳得多。现场反馈说，HPC220处理凝灰岩，产量和粒度都让人满意。

第二关：形状不规整，怎么“整形”

圆锥破出来的骨料虽然粒型不错，但要做成高品质机制砂，还得过“整形”这一关。普通制砂机打出来的砂，要么颗粒棱角太多，要么级配不均匀。

世邦工业配的是VSI系列立轴冲击式破碎机。这台设备的巧妙之处在于两种进料模式可以灵活切换——物料进入高速旋转的转子后被充分加速抛出，与周围物料相互撞击，通过“石打石”的原理完成破碎和整形。出来的成品呈立方体，粒形好、级配合理、细度模数可调。

现场用了三台VSI5X1150冲击破，配合振动筛分级筛选，成品砂的颗粒形状得到了明显改善。

第三关：石粉太多，怎么“控”

解决了破碎和整形，最大的难题来了——凝灰岩机制砂的亚甲蓝超标问题。

传统湿法制砂靠水洗除粉，但西北地区水资源紧张，而且水洗后的细砂流失严重，级配反而变差了。干法工艺又面临粉尘扩散的环保压力。

世邦工业的VU塔楼式制砂系统，走的就是干法路线。这套系统采用塔楼式全封闭布置，集制砂、整形、筛分、除粉、级配调整于一体。关键是通过负压除粉技术，把石粉集中收集再利用，既解决了亚甲蓝超标问题，又实现了粉尘零排放。

现场用的VU150塔楼，处理凝灰岩原料，产出的机制砂级配合理、粒型圆润、含粉量可控。用这种砂配制混凝土，流动性好、强度高，还能减少胶凝材料用量。

十年四次迭代，一条线的进化之路

从2014年固定产线落地，到2015年移动站灵活补位，再到2018年VU塔楼升级、2019年智能化技改焕新——十年间四次迭代，这条凝灰岩生产线一步步从“能出砂”变成了“出好砂”。

2019年的智能化改造尤其值得一提。全自动化控制系统上线后，设备运行状态实时监测，产能、能耗、成品品质全部数字化管理。原来需要不少工人盯着的生产线，现在五个人就能搞定。

绿色闭环，不只是说说

如今，这家企业已形成绿色矿山建设、精品机制砂石加工、高性能商品混凝土和预拌砂浆生产、建筑固废资源化利用、物流运输服务及装配式建筑“六位一体”的绿色建材循环产业链。成品骨料一方面供应天水市政道路、桥梁等基建工程，另一方面为本地区高性能混凝土和预拌砂浆生产线提供更好原料。

世邦工业的技术团队多次回访，做设备检修培训、沟通配件供应、收集客户反馈。现场生产承包经理的评价很实在：“设备运行稳定，这么多年了，产能一直没掉过。”

 

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

LIMING brings a large number of high-qualification talents together. Bai Yinghui, general research and development engineer, is a well-known expert in crushing and grinding area who won the youth medal of technology of the state council and receives special government allowance. LIMING owns an experienced service team, offering the customer free design and professional skill training and live guide for installation and debugging. The company's service networks have spread all over the country. Established client files, and mix the traditional door-to-door service with online service together, complementary the advantages. LIMING has won high recognition from clients.

The company mainly manufactures mobile crushers, stationary crushers, sand-making machines, grinding mills and complete plants that are widely used in mining, construction, highway, bridge, coal, chemical, metallurgy, refractory matter, etc. Product quality is life, and scientific innovation is motive power. LIMING got ISO international quality system certification, European Union CE certification and Russian GOST certification. The company has strong research and development strength and innovation.

LIMING machinery research institute was founded in 2005 which is the most powerful comprehensive technological research institute in the domestic mining machinery industry and provides top scientific research platform for professional personnel. Up to now, LIMING has won 10 national patents, 24 national utility model patents and 3 provincial science and technology achievement awards. The company products remain the international leading level by strengthening international exchanges and cooperation all the time, and has won a wide range of international market, such as Russian, Azerbaijan, Kazakhstan, Turkey, Kuwait, South Africa, Egypt, Vietnam, Malaysia, India, Australia, Korea, Canada and European Union,etc. Through more than 30 years' hard work, LIMING's staff built supremacy of credibility, excellent quality, service "LIMING" brand, and has made outstanding contributions to the development of mechanical manufacturing industry for China and the whole world.

现场视频如下：