重选

Characteristics of different dry coal beneficiation methods and advantages of air dense medium fluidized bed were introduced in paper.

论文讨论了洁净煤分选技术的意义和现状、各种干法分选方法的特点以及空气重介质流化床选煤技术的优越性。

The latest development of air heavy medium fluidized bed coal separation technology were discussed.

在上个世纪我国就开始了空重介流化床选煤技术的研究，取得了很大的成果。

The paper presents a more detailed discussion of the significance and present situation of coal separation and the latest development of air heavy medium fluidized bed coal separation technology.

详细讨论了选煤的意义和现状以及空气重介质流化床选煤技术目前的发展。

The two kinds of classics are essentially different: the critical reassessment of classics is carried out on the axis of vertical convergence, and the mass selection of classics relies on the connective operation on the axis of horizontal assemblage.

而两种经典化有本质的不同，批评性经典重估，主要是纵聚合轴上的比较选择操作；群选的经典更新，主要是横组合轴上的粘合连接操作。

The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.

本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。

CLf 4 flotation cells for coarse particle ores and BK 201 new frother were applied and the technical transformation was made on the thickening and filtering equipment for flotatlon concentrate s,as a result,the copper recovery was improved by 16.35%.

针对投产初期铜综合回收率低、铜精矿水分大等问题，调整了重、浮选工艺流程，采用了CLF—4型粗颗粒浮选机和BK—201新型起泡剂，并对浮选精矿浓缩－过滤工艺设备进行了技术改造，使铜回收率提高16.35个百分点。

Main products: liquid quantitative filling machine, automatic weight sorting machine, automatic packing machine, automatic batching systems,°scales, various types of explosion-proof scales, weighing module, a variety of special equipment to transform scales, small loadometer Electronics, Electronics Truck Scale, Electronic Hanging Scale, Scale Labels, hydraulic forklift scale, chemical cylinder scales, electronic scales, electronic weight scale, electronic counting scales, electronic hopper scales, postage scales, nutrition scales, scales such as the human body.

主要产品：液体定量灌装机、重量自动选别机、自动计量包装机、自动配料系统、桶槽秤、各式防爆秤、称重模块、各种特殊设备改装秤、电子小地磅、电子汽车衡、电子吊秤、标签秤、液压叉车秤、化工钢瓶秤、电子天平、电子计重秤、电子计数秤、电子料斗秤、邮资秤、营养秤、人体秤等。

It supply the fruit grading function in high speed and precision for fruit packing system.

称重模块作为电子选果机称重和控制的核心，实现了水果包装系统快速和高精度的分选。

This thesis is related to the research of dynamic response of continuous weighing process of a 38weighing units fruit weighing sorter.

本论文为研究一台具有38个秤重元件的水果重量选别机研究的目的在分析连续秤重过程下的动态响应。

H.M. Cyclones are a variety of the coal cleaning equipment which has been widely applied to the heavy medium separation.

重介质旋流器是当前重介质选煤中广泛应用的分选设备。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐