About Us

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.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

US3325105A - Mineral grinding aids and process of

While the novel additive of the present invention is applicable, as stated above, to all minerals, e.g., iron ore, bauxite, phosphate rock, beryl and cement, for convenience, the use of the...

Cement Grinding Aid - SIKA TECHNOLOGY AG

The invention relates to an aqueous polymer composition which is used in the form of a cement grinding aid and makes it possible to effectively reduce the grinding time and to obtain cements exhibiting excellent characteristics. A cement grinding aid containing a combination of polymer A and known cement grinding aids is also disclosed.

US Patent for Process for grinding waxes using grinding ...

22/11/2011  FIELD OF THE INVENTION. The present invention relates to a process for grinding waxes, especially paraffin waxes using a polyol as a grinding aid, especially a fluidized bed counter-jet mill, to wax powders thus produced and to the use of polyols as a grinding aid for waxes. BACKGROUND OF THE INVENTION

CEMENT GRINDING AID COMPOSITION - Dow Global

The problem addressed by this invention is the provision of cement grinding aid compositions that provide improved efficiency during the grinding of cement. STATEMENT OF INVENTION We have now found that the efficiency of cement grinding can be improved by the addition thereto of a grinding aid composition containing a primary or secondary alkanolamine together with a glycol compound.

Patent Report: US10077211 Cement grinding aids ...

The present invention provides a preparation method of a liquid cement grinding aid prepared with waste antifreeze, including: firstly adding an alkaline solution into waste antifreeze to regulate the pH value to 8-12, adding a certain amount of flocculant, and stirring and standing; separating a small amount of upper-layer oil, then filtering to remove flocculent precipitates, thus obtaining a clear mixed solution

US5131600A - Alkanol amine grinding aids - Google Patents

The efficiency of grinding of silica-containing solids such as mineral ores is improved by the addition of alkanol amines as a grinding aid. Examples of useful amines include diethanol amine,...

Wuhan Huaxuan High - tech Co., Ltd

In the course of the development of 12 years, Wuhan Huaxuan High-tech Co., Ltd has gained impressive achievements in the fields of new-type wall material, concrete admixtures, new type of movable manufacturing equipment of polycarboxylate superplasticizer,and cement grinding aids,etc. The company now owns twelve items of invention patents and passed the eight achievement

Diethanolisopropanolamine 85% in cement grinding aids ...

Diethanolisopropanolamine or DEIPA is a brand new type of cement additives/grinding aid raw material with outstanding test and usage result. DEIPA has a high compatibility along with Triethanolamine (TEA), Triisopropanolamine (TIPA), Alcohol, Amine and fat. During the process of producing an additive, DEIPA can be used by itself or with other materials. Depending on the quality of the cement raw materials,

History of optics - Wikipedia

By grinding his own mirrors, using Newton's rings to judge the quality of the optics for his telescopes, he was able to produce a superior instrument to the refracting telescope, due primarily to the wider diameter of the mirror. In 1671 the Royal Society asked for a demonstration of his reflecting telescope. Their interest encouraged him to publish his notes

What evidence is there of the vision aids people used ...

28/10/2017  Their invention seems to be credited to Abbas ibn Firnas, a 9th century Andalusian polymath. (The two articles making this claim don't seem so well sourced, so take this with a grain of salt. He may have actually invented a process to produce well polished stones.)

US Patent for Process for grinding waxes using grinding ...

22/11/2011  Grinding aids in the form of polyols are used, in particular polyols having 2 to 12, in particular 3 to 7 carbon atoms and, optionally, 1 to 4 ether groups. Polyols within the meaning of the present compound are alcohols having at least two free hydroxy groups, in particular three or four free hydroxyl groups. Especially preferred are trimethylolpropane, ethylene glycol, diethylene glycol ...

Patent Report: US10077211 Cement grinding aids ...

Meanwhile, the cement grinding aid enhancer prepared in the present invention is good in grinding aid performance and low in cost, can greatly improve the yield of cement and the strength of cement at each age, meets the requirements of national standards for cement products and cement grinding aids, and does not influence the durability of concrete. Experimental results show that when 0.03% ...

Leslie A. Jardine Inventions, Patents and Patent ...

16/09/2014  Abstract: The present invention provides cement grinding additive compositions and methods which allow a PVC-safe, powerful, and robust defoaming agent to be uniformly dispersed throughout a broad concentration range while retaining storage stability even in cases wherein the defoaming agent is highly diluted. Exemplary cement grinding additive compositions comprise at

Diethanolisopropanolamine 85% in cement grinding

Diethanolisopropanolamine 85% in cement grinding aids: Certification - category: ... 20 years' development, the company has become a knowledge and technology-intensive economic entity, it has numbers of invention patents and practical patented technology. In 2004, it was identified as Hebei Province high-tech enterprises. Horizon adopt DCS automated production lines, the quality of our ...

A review on mechanical activation and mechanical alloying ...

01/08/2019  Altun et al. (2014, 2015) studied three types of grinding aids (TEA-based and TIPA-based) on the grinding results of dry stirred milling of cement. They proved that TIPA based grinding aid was found to be effective for dry stirred media grinding of cement due to its provided operational benefits and quality improvements (28-days strength with 18.8%) as well as lower specific grinding work ...

Wuhan Huaxuan High - tech Co., Ltd

In the course of the development of 12 years, Wuhan Huaxuan High-tech Co., Ltd has gained impressive achievements in the fields of new-type wall material, concrete admixtures, new type of movable manufacturing equipment of polycarboxylate superplasticizer,and cement grinding aids,etc. The company now owns twelve items of invention patents and passed the eight achievement

What evidence is there of the vision aids ... - Stack Exchange

28/10/2017  What evidence is there of the vision aids people used before the invention of eyeglasses in about 1286? Ask Question Asked 3 years, 7 months ago. Active 8 months ago. Viewed 4k times 24. 7. The Wikipedia article on glasses says ‘scattered evidence exists for use of vision aid devices in Greek and Roman times’ but only cites the example of Nero’s emerald. This article on Magnifying ...

Concrete - Sika

Invention and development of new construction methods place increasing demands on the building materials. Concrete producers face this technological challenge daily alongside other factors such as economy, ecology, raw material and energy costs and logistical complexity. In the duration of the whole construction process, time itself is an increasingly important factor. Sika provides a wide ...

grinding - Traduction en français - exemples anglais ...

L'invention a également pour objet une installation de broyage. A novel grinding mixture useful for preparing a solid-liquid slurry. Nouveau mélange de broyage utile dans la préparation d'une boue solide-liquide. A magnetic fluid grinding cell is disclosed. L'invention se rapporte à une cellule de meulage par fluide magnétique. Technical solutions for ingot and mould grinding. Définition ...

grinding - Translation into French - examples English ...

Translation of "grinding" in French. The invention also relates to a grinding installation. L'invention a également pour objet une installation de broyage. A novel grinding mixture useful for preparing a solid-liquid slurry. Nouveau mélange de broyage utile dans la préparation d'une boue solide-liquide. A magnetic fluid grinding cell is ...