MLK型立式輥磨機(jī) Vertical Roller Mill

MLK立式輥磨機(jī)應(yīng)用于鋼廠礦渣的制粉系統(tǒng)，也適用于粉磨水泥熟料及其他化工原料。

MLK vertical roller mills are applied in coal pulverizing system of slag in steel works. They can also be used to grind cement clinkers and other chemical raw materials.

礦渣“高細(xì)高摻”技術(shù)是近十年來才研發(fā)的新技術(shù)，北方重工是國內(nèi)目前大型立式輥磨機(jī)的最主要生產(chǎn)廠家，自主開發(fā)創(chuàng)新了多個(gè)規(guī)格的MPS（MLS）立式輥磨機(jī)，包括市場(chǎng)應(yīng)用廣泛的MLS3626立式輥磨機(jī)和國內(nèi)****可日產(chǎn)5000噸的MLS4531立式輥磨機(jī)。北方重工在吸收國內(nèi)外先進(jìn)技術(shù)的基礎(chǔ)上，自主開發(fā)的用于粉磨礦渣的MLK系列立式輥磨機(jī)，解決了“穩(wěn)定料床防止振動(dòng)”、“磨內(nèi)除鐵”、“磨輥和磨盤的磨損”、“高效選粉”等關(guān)鍵技術(shù)難點(diǎn)。

Slag “high fineness and high adulteration” technology is a kind of new technology developed in the recent ten years. Northern Heavy Industry is by far the largest manufacturer of large vertical roller mills in China which has independently developed MPS (MLS) vertical roller mills of many specifications, including MLS3626 vertical roller mills applied widely in the market and MLS4531 vertical roller mills which have the largest production capacity of this type in China (5,000 tons per day). Northern Heavy Industry, on the premise that it absorbs advanced technology from China and overseas, independently developed MLK vertical roller mills used to grind slag, which solves the main technical problems of “stabilizing material bed and preventing vibration”, “deironing in mills”, “abrasion of grinding roller and grinding disc”, and “high-efficiency separation”.

MLK立式輥磨機(jī)的工作原理：

Working Principle

MLK立式輥磨機(jī)屬于外加力型輥盤式磨機(jī)。電動(dòng)機(jī)通過主減速機(jī)驅(qū)動(dòng)磨盤旋轉(zhuǎn)，磨盤的轉(zhuǎn)動(dòng)帶動(dòng)三個(gè)磨輥?zhàn)赞D(zhuǎn)。高爐礦渣經(jīng)喂料裝置進(jìn)入磨機(jī)喂料槽落到磨盤中心；在磨盤回轉(zhuǎn)產(chǎn)生的離心力作用下，礦渣向磨盤邊緣運(yùn)動(dòng)并通過磨輥下部及磨盤襯板上部之間的碾磨區(qū)被碾磨；碾過的物料越過磨盤邊緣的擋料環(huán)，被從噴口環(huán)噴出的熱風(fēng)吹起，進(jìn)入磨機(jī)上方的選粉機(jī)；選粉機(jī)將合格的細(xì)粉選出，粗粉沿返料斗再次回落到磨盤上碾磨；未經(jīng)熱風(fēng)帶走的鐵粉通過外循環(huán)系統(tǒng)時(shí)，由精細(xì)除鐵器分離。

MLK vertical roller mills are applied force roller mills. The motor drives the rotation of millstone through the main reducer. The rotation of millstone drives the autorotation of the three grinding rollers. Blast furnace slag enters the mill feeding trough through feeding device and fall onto the center of millstone. Under the action of centrifugal force produced during the rotation of millstone, the slag moves towards the edge of the millstone and is milled through the milling area between the bottom of grinding roller and the top of millstone lining plate. The milled materials cross the material retaining ring at the edge of millstone, are blown by the hot wind from the nozzle ring, and enter the powder concentrator above the mill. The powder concentrator selects qualified fine powder. The coarse powder falls again onto the millstone for milling along the return hopper. The iron powder not taken away by hot wind is separated by the refined iron remover when passing the circulation system.

MLK立式輥磨機(jī)采用的最新技術(shù)：

Newest technology adopted by MLK vertical roller mill

◆  高效高細(xì)選粉技術(shù)

◆  High-efficiency and Superfine Power Selection Technology

采用最新型的動(dòng)靜態(tài)分離器，它的選粉效率高，旋轉(zhuǎn)葉片轉(zhuǎn)速采用變頻調(diào)速，細(xì)度調(diào)節(jié)范圍寬。為減少分離器旋轉(zhuǎn)葉片的漏風(fēng)量，從而提高選粉效率和穩(wěn)定細(xì)度，我們采用了沈重獨(dú)有的立式輥磨機(jī)分離器風(fēng)壓密封裝置（中國專利號(hào)：200520093439.X），可獲得穩(wěn)定的細(xì)度和產(chǎn)量。

It adopts the newest dynamic and static separator whose powder selection efficiency is high. The rotation speed of rotary vane adopts speed regulation by frequency variation. The adjustment range of fineness is wide. To reduce the air leakage so as to improve the powder selection efficiency and stabilize fineness, we adopt unique wind pressure device of vertical roller mill separator (No. of Chinese patent: 200520093439.X). Stable fineness and output can be realized.

◆  碾磨材料技術(shù)

◆  Grinding Material Technology

磨輥和磨盤瓦采用最新堆焊硬質(zhì)合金材料。采用韓國TECH公司的和英國焊接合金公司（Welding  Alloys  Limited）技術(shù)和焊接材料進(jìn)行表面堆焊硬質(zhì)合金，堆焊表面無龜裂，母材可重復(fù)使用，使用壽命2000~4000h。沈重可隨機(jī)提供自動(dòng)焊接機(jī)，在現(xiàn)場(chǎng)即可對(duì)磨輥和磨盤瓦進(jìn)行修復(fù)堆焊。

Grinding rollers and trays use the newest cemented carbide hardfacing materials. It adopts the technology and welding materials of TECH Company in South Korea and Welding Alloys Limited for hardfacing alloy. The overlaying surface is free from crack. The base materials are reusable whose service life is 2,000 to 4,000 hours. Shenyang Heavy Machinery Group Co., Ltd can provide automatic welding machines and perform hardfacing reparation of grinding rollers and trays.

◆  磨輥強(qiáng)力增壓結(jié)構(gòu)

◆  Grinding Roller High-strength and Pressure-increasing Structure

磨輥和磨盤瓦采用經(jīng)優(yōu)化設(shè)計(jì)的曲率，在對(duì)物料進(jìn)行碾磨過程中自動(dòng)形成增壓區(qū)和高壓粉磨區(qū)，高效地完成粉磨過程。增壓區(qū)的作用是使松散物料迅速壓實(shí)，并完成初破碎和粉磨。物料最終在高壓粉磨區(qū)完成高效粉磨作業(yè)。

Grinding rollers and trays adopt optimally designed curvature. Pressure increasing section and high-pressure grinding section are formed automatically during the process of material grinding to finish grinding with high efficiency. The function of pressure increasing section is to get bulk materials rapidly compressed as well as to finish initial crushing and grinding. The high-efficiency grinding of materials are eventually finished in the high-pressure grinding section.

◆  強(qiáng)力單輥加壓結(jié)構(gòu)

◆  High-strength Single-roller Pressurized Structure

MLK立式磨磨機(jī)磨輥采用單輥加壓結(jié)構(gòu)，每個(gè)磨輥使用獨(dú)立的加壓系統(tǒng)，加壓系統(tǒng)由液壓加壓，液壓系統(tǒng)正常工作壓力約11MPa。磨輥碾磨壓強(qiáng)較水泥原料立磨高一倍以上，以適應(yīng)高細(xì)粉磨的需要。為提高液壓系統(tǒng)的穩(wěn)定性，碾磨區(qū)全部液壓元件采用31.5 MPa產(chǎn)品，可以保證液壓系統(tǒng)運(yùn)行可靠，無滲漏。

The grinding roller of MLK vertical roller mills is of single-roller pressurized structure. Every grinding roller uses independent pressurization system. The pressurized system applies pressure through hydraulic system. The normal operating pressure of hydraulic system is about 11MPa. The milling pressure of grinding roller is more than twice as much as that of cement raw material mill, so as to cater to the requirement of high fine grinding. To improve the stability of hydraulic system, all hydraulic components in milling section are 31.5MPa products which can ensure reliable operation and no leakage of hydraulic system.

◆穩(wěn)定料床防止振動(dòng)結(jié)構(gòu)

◆ Material bed stabilizing and vibration preventing structure

◆磨內(nèi)除鐵結(jié)構(gòu)

◆ Deironing structure in mills

◆噴水穩(wěn)定料層裝置

◆ Water spraying and material bed stabilizing device

技術(shù)參數(shù)

型號(hào)規(guī)格		MLK2250	MLK2650	MLK2900	MLK3250	MLK3450	MLK3750
產(chǎn)量	t/h	30	45	60	75	90	110
功率	kw	1200	1800	2200	2800	3300	4100
名義研磨軌道直徑	mm	2250	2650	2900	3250	3450	3750
比表面積	m2/ kg	≥450
電耗指標(biāo)	kwh/t	≤30
允許原料水分	%	≤18
外循環(huán)量	%	20
分離器功率	kw	75	110	160	200	250	355
碾磨比壓	kN/m2	1200