CASES

The AHK (R) slurry pump is applied to the feed pump in the cow head trench area of jinniu co., LTD

Date：2017-05-02 Views:1166

一、Project background

The expansion project of niu tou gou mining area, jinniu co., LTD., golden bull, China, is a gold mine with a new daily processing capacity of 3000t/d. The company's original ore is gold ore, and the company's products are the quality gold. Technological process: the design of the whole mud cyanide - carbon - carbonized process. Among them: three sections of closed-circuit process; Grinding: two closed-circuit processes; Separation process: cyanide leaching - coal slurry adsorption - desorption electrolysis - gold - mud smelting process。

二、Problem solving

In the working condition of the cyclone feeding pump, the particle size is very large and the concentration of pulp is very large. Due to the large and super large domestic mines in recent years towards the development of its production and processing scale is several times in the past, it puts forward higher requirements on slurry pump, such as: large flow, long life, high reliability. At present, foreign enterprises are doing better in this field, including grinding grading and tailing transportation. Our company for the working condition, research and development of a new generation of high wear-resistant AHK series slurry pump is designed for viscous abrasiveness slurry large particles in the slurry pump, double pump shell structure, flow components materials such as metal and elastomer, can provide the best strength, durability and combination, and is suitable for the working condition of wear and tear "the strongest。

三、The solution

Number	Name	Application	Working condition	Technical parameters	Choose the product	Remark
1	A cyclone feeding pump	A pulp used to deliver a flow-type ball mill to a segment of a cyclone. The slurry pump and the swirler form the slurry grading system, and the slurry is divided into fine sand and coarse sand, and the fine sand slurry enters the lower work, and the coarse sand returns the overflow type ball mill.	Gold mine, hardness f = 8 ~ 12, pulp weight concentration: Cw = 50 ~ 55%, d90 = 2mm, ore density 2.67 t/m3, slurry ratio: 1.455 t/m3	Flow: Q = 700m3 / h, yangcheng: h = 50m	250/200st-ahk, n = 775rpm, eta = 71 %, NPSHr = 5.5 m, supporting 6/250kw motor, CR belt transmission, S01 material for overflow components, shaft seal: auxiliary impeller + packing seal.
2	Two stage cyclone feeding pump	It is used to transport the slurry of the overflow ball mill to the two-segment cyclone. The slurry pump and the swirler form the slurry grading system, and the slurry is divided into fine sand and coarse sand, and the fine sand slurry enters the lower work, and the coarse sand returns the overflow type ball mill.	Pulp weight concentration: Cw = 30 ~ 40%, d90 = 0.15mm, ore density 2.67t/m3, slurry ratio: 1.333 t/m3	Flow: Q = 800m3 / h, lift: h = 45m	250/200st-ahk (R), n = 760rpm, eta = 71%, NPSHr = 6m, complete with 6/250kw motor, CR belt transmission, natural rubber + qt500-7 material for overflow components, shaft seal: secondary impeller +
Product advantage	1, the series slurry pump is single stage single suction horizontal centrifugal pump, double shell design standards according to JB/T8096 > < centrifugal slurry pump, is applicable to transport strong abrasion, high concentration of slurry, conveying solid-liquid mixture temperature can reach 100 ℃, the biggest concentration of slurry delivery for: volume concentration CV 30% or less; The weight of the CW is less than 65%. This type of pump can also realize multi-level series use according to user demand. The transmission form mainly focuses on belt transmission; 2. The overflow parts can be interchangeable wear-resistant metal lining or rubber lining, which can be used to select materials with high cost performance in accordance with the user's working conditions; 3. Shaft seal can be sealed with packing seal, auxiliary impeller, packing seal or mechanical seal; 4, spit export position according to user requirements according to 45 °, installation using rotating eight different point of view, in order to meet the needs of different users site installation; 5, the level of open thin oil self-lubricating bracket component, bracket with large oil tank design, for the medium temperature higher than 80 ℃ and equipped with high-power motor working condition, bracket cover cooling chamber structure, ensure the bearing under the condition of low temperature operation for a long time, make the pump long-term reliable operation; 6. The axial adjustment structure of the bracket components shall be designed to ensure the minimum clearance between the pump impeller and the front retaining plate, so as to reduce the volume loss and make the pump run effectively for a long time.

Application effect

Through the early stage of the project with the owner, design institutes, construction unit and communication for many times, sanlian pump industry to the project owner provides a set of complete and reliable cyclone feed slurry transportation solutions.

The scheme to solve the similar products at home and abroad of the hydraulic efficiency is low, bearing the heat, shaft seal leakage, short life of bearing, adopting CFD analysis software, to the optimization design of hydraulic parts, hydraulic performance than similar domestic products performance efficiency on average three percent; By referring to a series of patented technologies and structural innovations, the problems of bearing heat, shaft seal leakage and short bearing life of similar products at home and abroad are solved. A cyclone feed pump flow components with wear-resisting alloy material and casting CAE analysis software effectively, make the flow components service life can reach 2 to 3 months, two stage cyclone feed pump and thickener before feeding pump, over-current components using natural wear-resisting rubber, make the flow components service life can reach four to six months. Similar condition of the same trade in the domestic, our company chooses the slurry pump flow components has been greatly improved, service life of equipment maintenance cost reduced by 20%, the product quality and site construction of the project owner and guidance services to be highly satisfaction evaluation, won the praise of the owner and design institute.