應(yīng)用方案主頁 > 新聞中心 > 應(yīng)用方案 > 內(nèi)蒙古包頭磁鐵礦破碎選礦技改，破碎段影響大
一、項(xiàng)目背景與技術(shù)挑戰(zhàn)
包頭磁鐵礦地處內(nèi)蒙古核心礦區(qū)，礦石硬度f=12-14，磁性鐵含量35%-45%，屬于典型的中低品位磁鐵礦。原400t/h生產(chǎn)線長期面臨以下技術(shù)瓶頸：
破碎環(huán)節(jié)：現(xiàn)有設(shè)備難以適應(yīng)高硬度礦石，襯板磨損快（壽命僅450小時(shí)），圓錐破主軸故障率高；
分級效率：-13mm合格粒級占比不足65%，磨礦能耗超標(biāo)；
金屬回收率：整體回收率僅72%，較行業(yè)先進(jìn)水平低8-10個(gè)百分點(diǎn)。
二、系統(tǒng)性改造方案
（一）破碎系統(tǒng)升級
粗碎工段：配置C6X145顎式破碎機(jī)
采用重型鍛造主軸（Φ220mm）
V型破碎腔設(shè)計(jì)，嚙角優(yōu)化至22°
雙向液壓調(diào)整系統(tǒng)（調(diào)節(jié)速度3mm/s）
處理能力提升至650t/h
中細(xì)碎工段：HST250圓錐破組合
三層液壓保護(hù)系統(tǒng)（清腔/過鐵/過載）
主軸轉(zhuǎn)速自適應(yīng)控制（200-350rpm可調(diào)）
智能襯板磨損監(jiān)測（精度±2mm）
配備專用除鐵裝置（磁場強(qiáng)度12000Gs）
（二）分級工藝創(chuàng)新
預(yù)篩分系統(tǒng)：S5X3075-3T高頻篩
篩分效率η≥92%
采用聚氨酯篩網(wǎng)（壽命3000小時(shí)）
振幅/頻率在線調(diào)節(jié)
返料控制系統(tǒng)：
實(shí)現(xiàn)-20mm粒級預(yù)先分級
中碎循環(huán)負(fù)荷穩(wěn)定在35%-45%
細(xì)碎閉路循環(huán)量降低28%
三、關(guān)鍵技術(shù)突破
磁鐵礦專用破碎腔型設(shè)計(jì)
破碎比優(yōu)化至4.8:1
過鐵保護(hù)響應(yīng)時(shí)間≤80ms
節(jié)能降耗技術(shù)
實(shí)施峰谷電價(jià)優(yōu)化策略
液壓系統(tǒng)節(jié)能改造（節(jié)電15%）
四、運(yùn)行成效與經(jīng)濟(jì)指標(biāo)
技術(shù)指標(biāo)：
處理能力：穩(wěn)定480t/h（超設(shè)計(jì)20%）
產(chǎn)品粒度：-13mm占比≥90%
金屬回收率：82.5%（提升10.5%）
噸礦電耗：5.8kWh（降低33%）
經(jīng)濟(jì)效益：
年增鐵精粉12萬噸
設(shè)備維護(hù)成本降低210萬元/年
綜合效益提升37%
環(huán)保指標(biāo)：
粉塵濃度≤8mg/m³
噪聲級≤75dB(A)
項(xiàng)目成果已在山西、河北等地推廣，累計(jì)創(chuàng)造經(jīng)濟(jì)效益超3億元。下一步將開展5G+智能礦山建設(shè)，打造無人化選礦示范工程。
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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.
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