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

Phosphogypsum as a construction material - ScienceDirect

10/11/2017  Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer. • PG can be reused as a construction material. • Including PG in the matrix reduced its workability, density and mechanical strength. • Including PG in the matrix increased

Utilization of phosphogypsum as raw and calcined material ...

01/08/2008  It was reported that these blocks have sufficient strength for their use in general building construction. The enormous volume of unused phosphogypsum can be re-used by combining fly ash and Portland cement in the building industry. However, environmental concerns have developed in the past 10 years due to the presence of radionuclides in phosphogypsum. This material contains

A Review of Effective Utilization of Waste Phosphogypsum ...

Phosphogypsum can be used as separate building material or as admixture in concrete, cement mortar, pop, stabilizer or in combination with other waste material. IV AcknowledgmentAuthors are thank full to Rashtriya Chemical and Fertilizers for their valuable guidance and necessary support. Authors are also thank full to Dept. of Civil Engineering Government college of Engineering karad for providing such

EPA Approves Use of Phosphogypsum in Road

14/10/2020  In countries where reuse is practiced – such as road building, construction material, fertilizer, and landfill cover – up to 20% of annual phosphogypsum production is diverted from stacking to other uses. While the approval of TFI’s request does not mean that phosphogypsum will become widespread in roads, it allows state and local governments to investigate the opportunity to use phosphogypsum

Effect of Phosphogypsum on the Properties of Portland ...

01/01/2017  Treated phosphogypsum can be used as an ingredient of plaster [6, 7, 8]. The most important and motivating use of phosphogypsum could be in the construction industry. In the manufacturing process of cement, phosphogypsum could be used as a replacement of natural gypsum which plays the role of a set retarder [9, 10], or to reduce the clinkerization temperature [11]. Study also conducted with weathered (stored in open air) phosphogypsum

A Review of Effective Utilization of Waste

Phosphogypsum can be used as separate building material or as admixture in concrete, cement mortar, pop, stabilizer or in combination with other waste material. IV AcknowledgmentAuthors are thank full to Rashtriya Chemical and Fertilizers for their valuable guidance and necessary support. Authors are also thank full to Dept. of Civil Engineering Government college of Engineering karad for ...

what are the uses of phosphogypsum in construction

Use of phosphogypsum in road construction - ResearchGate . PG has also been used in the stabilized road bases in the civil engineering [10 11] and to modify the pH and calcium content of soil in agriculture [12]. Especially... Get Price. ADVANTAGES AND DISADVANTAGES OF USING ... 13 Nov 2009 ... Keywords: Phosphogypsum natural radioactivity building materials cement alternative uses ...

A new civil engineering material: normal temperature ...

02/01/2021  Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer industry. Approximately 5 tonnes of PG are generated for per ton of phosphoric acid production. The accumulation of PG occupies huge amounts of land resources and results in serious environmental risks. In this study, a new civil engineering building material product, normal temperature-modified PG-embedded filler ...

Enginering Advantages of Waste-Phosphogypsum in Con ...

Dinesh W Gawatre Civil Engineering Dept., P.R.M.I.T R Badnera, Anjangaon Bari Road, Badnera - 444701, ... use of phosphogypsum in partial replacement of cement in concrete shows more application in construction area. Major solid wastes and their potential use in construction materials Growth of population, increasing urbanization, and rising stand-ards of living due to technological ...

Laboratory Study of Phosphogypsum, Stabilizers, and ...

However, since the 1980s, many studies have focused on the use of PG since it has a low radioactive emanation rate in civil engineering applications, such as in soil stabilization (Degirmenci et al. 2007; James and Pandian 2014; James et al. 2014), pavement layers (Lloyd Jr. 1985; Conklin 1992), the cement industry (Altun and Sert 2004), brickmaking (Yang et al. 2009), and concrete (Smadi et ...

Low-Carbon Sustainable Composites from Waste

2 天前  It was claimed from a Brasil study that the recycling PG can be used as building materials due to there is no additional health risk from the radioactivity perspective . Similarly, a recent study from Serbia reported that the average activity concentration of 226 Ra, 232 Th, and 40 K of PG samples was 600 ± 28 Bq kg −1 , 3.2 ± 0.3 Bq kg −1 , and 47 ± 16 Bq kg −1 , respectively.

Low-Carbon Sustainable Composites from Waste Phosphogypsum ...

2 天前  3 School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, ... phosphogypsum; building materials; composites; recycling; environmental impact 1. Introduction PG is a by-product of industrial phosphoric acid production. For every ton of phos-phoric acid produced, 4–5 tons of PG will be produced [1,2]. At present, the output of PG is increasing rapidly at the rate of ...

Phosphogypsum - an overview ScienceDirect Topics

Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or ‘wet process’, in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium sulfate, mainly in dihydrate form (CaSO 4 2H 2 O):

Application of phosphogypsum in soil stabilization ...

01/09/2007  Additives such as fly ash and phosphogypsum can be added to the soil–lime and soil–cement mixtures to further enhance the properties of the stabilized soil. In the present study, an industrial by-product phosphogypsum has been used with cement and fly ash as a chemical stabilization material to improve the engineering properties of selected soils. Phosphogypsum (PG)

Seismic Behaviour of Cast-In-Situ Phosphogypsum

The acidity of phosphogypsum can be integrated with CaO, which can reduce the solubility and dissolution rate of β-CaSO 4 0.5H 2 O, and extend the setting time of phosphogypsum by retarder. The reduction of free water can be achieved by water reducing agent. It is proposed that the quality ratio of raw materials is as follows: 80% phosphogypsum, 17% phosphorus slag powder, 3% CaO, 2%

what are the uses of phosphogypsum in construction

Use of phosphogypsum in road construction - ResearchGate . PG has also been used in the stabilized road bases in the civil engineering [10 11] and to modify the pH and calcium content of soil in agriculture [12]. Especially... Get Price. ADVANTAGES AND DISADVANTAGES OF USING ... 13 Nov 2009 ... Keywords: Phosphogypsum natural radioactivity building materials cement alternative uses ...

Enginering Advantages of Waste-Phosphogypsum in Con ...

Dinesh W Gawatre Civil Engineering Dept., P.R.M.I.T R Badnera, Anjangaon Bari Road, Badnera - 444701, ... use of phosphogypsum in partial replacement of cement in concrete shows more application in construction area. Major solid wastes and their potential use in construction materials Growth of population, increasing urbanization, and rising stand-ards of living due to technological ...

Laboratory Study of Phosphogypsum, Stabilizers, and ...

However, since the 1980s, many studies have focused on the use of PG since it has a low radioactive emanation rate in civil engineering applications, such as in soil stabilization (Degirmenci et al. 2007; James and Pandian 2014; James et al. 2014), pavement layers (Lloyd Jr. 1985; Conklin 1992), the cement industry (Altun and Sert 2004), brickmaking (Yang et al. 2009), and concrete (Smadi et ...

Effect of Phosphogypsum on the Properties of Portland Cement

aDepartment of Civil Engineering, Chittagong University of Engineering Technology, ... Treated phosphogypsum can be used as an ingredient of plaster[6, 7, 8]. The most important and motivating use of phosphogypsum could be in the construction industry. In the manufacturing process of cement, phosphogypsum could be used as a replacement of natural gypsum which plays the role of a set

USABILITY OF FLY ASH AND PHOSPHOGYPSUM IN

USABILITY OF FLY ASH AND PHOSPHOGYPSUM IN MANUFACTURING OF BUILDING PRODUCTS ... Department of Architecture, Balikesir **Balikesir University, Engineering and Architecture Faculty, Deparment of Civil Engineering, Balikesir Received Date : 03.08.2006 ABSTRACT In this study, the class-C fly ash, lime and phosphogypsum were used with water to produce fly ash-lime-phosphogypsum

Phosphogypsum - an overview ScienceDirect Topics

Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or ‘wet process’, in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium sulfate, mainly in dihydrate form (CaSO 4 2H 2 O):

Low-Carbon Sustainable Composites from Waste

2 天前  Phosphogypsum (PG) is an industrial waste from the production of phosphoric acid and phosphate fertilizer. Disposal and landfill of PG pose significant environmental problems due to its hazardous components. Although many researchers have explored the possibility of PG recycling, challenges still exist before it can be high-effectively reused. In particular, a great deal of recent

Refinement of waste phosphogypsum from Prahovo,

Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering - Volume 55 Issue 1

Seismic Behaviour of Cast-In-Situ Phosphogypsum

The acidity of phosphogypsum can be integrated with CaO, which can reduce the solubility and dissolution rate of β-CaSO 4 0.5H 2 O, and extend the setting time of phosphogypsum by retarder. The reduction of free water can be achieved by water reducing agent. It is proposed that the quality ratio of raw materials is as follows: 80% phosphogypsum, 17% phosphorus slag powder, 3% CaO, 2%

What are Eco-Friendly Building Materials used in ...

­Reduce material use ­These are energy efficient and also help reduce the dead load of a building. e.g. Ferrocement ­ Durability Life Span Material that are exceptionally durable, or require low maintenance e.g PVC pipes. Materials can be eco-friendly based on how they perform. Use of certain material or techniques can reduce the amount of material required. Durability – The longer the ...

what are the uses of phosphogypsum in construction

Use of phosphogypsum in road construction - ResearchGate . PG has also been used in the stabilized road bases in the civil engineering [10 11] and to modify the pH and calcium content of soil in agriculture [12]. Especially... Get Price. ADVANTAGES AND DISADVANTAGES OF USING ... 13 Nov 2009 ... Keywords: Phosphogypsum natural radioactivity building materials cement alternative uses ...

Reclamation, reconstruction, and reuse of

Phosphogypsum, a by-product of phosphate fertilizer production, is a material that has potential for use in road building and other construction uses. Engineering properties of a number of phosphogypsum containing products are described and experimental programs to demonstrate applications are reported.

Effect of Phosphogypsum on the Properties of Portland Cement

aDepartment of Civil Engineering, Chittagong University of Engineering Technology, ... Treated phosphogypsum can be used as an ingredient of plaster[6, 7, 8]. The most important and motivating use of phosphogypsum could be in the construction industry. In the manufacturing process of cement, phosphogypsum could be used as a replacement of natural gypsum which plays the role of a set

Study on the Properties of Waste Apatite Phosphogypsum

11/05/2018  Hence, apatite PG can be used for the production of binding plaster. Lanthanide extraction tests from apatite phosphogypsum utilizing sulphuric acid have shown the efficiency level to be at about 50% in relation to Ln 2 0 3 content in the initial raw material. Viability of the investment will be decided by the economy and the price of raw ...

Low-Carbon Sustainable Composites from Waste

2 天前  Phosphogypsum (PG) is an industrial waste from the production of phosphoric acid and phosphate fertilizer. Disposal and landfill of PG pose significant environmental problems due to its hazardous components. Although many researchers have explored the possibility of PG recycling, challenges still exist before it can be high-effectively reused. In particular, a great deal of recent

Seismic Behaviour of Cast-In-Situ Phosphogypsum

The acidity of phosphogypsum can be integrated with CaO, which can reduce the solubility and dissolution rate of β-CaSO 4 0.5H 2 O, and extend the setting time of phosphogypsum by retarder. The reduction of free water can be achieved by water reducing agent. It is proposed that the quality ratio of raw materials is as follows: 80% phosphogypsum, 17% phosphorus slag powder, 3% CaO, 2%

EFFECT OF CALCINED PHOSPHOGYPSUM IN PORTLAND

1PG Student, Dept. of Civil Engineering, Mar Athanasius College of Engineering, Kerala, ... calcined products, it can be used as partial replacement of cement PG could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. Besides, the industrial and urban management systems are generating solid wastes, and most often ...

Effect of Phosphogypsum and Fly ash on the CBR and UCS of ...

Phosphogypsum and fly ash 20%. additional increase in ratio of Phosphogypsum the C.B.R. value decreases. The maximum value of U.C.S. is also at 5% Phosphogypsum and fly ash 20%. Experiment results show Phosphogypsum and fly ash enhances the strength properties of soil along with use of economical materials and also solves

Refinement of waste phosphogypsum from Prahovo,

Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering - Volume 55 Issue 1

Filling Materials Based on Hemihydrate Phosphogypsum

04/04/2020  1 School of Civil and Resources Engineering, University of Science and Technology Beijing, ... By-product phosphogypsum can be divided into dihydrate phosphogypsum and hemihydrate phosphogypsum according to di erent production technology of wet process phosphoric acid. Dihydrate phosphogypsum can only be used as aggregate in mine filling [34–36]. This